BRC

User Manual: brc

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F BRAKES
A

SECTION

BRAKE CONTROL SYSTEM

CONTENTS
ABS
PRECAUTIONS .......................................................... 5
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER” .................................................................. 5
Precautions for Brake System .................................. 5
Precautions When Using CONSULT-II ..................... 5
CHECK POINTS FOR USING CONSULT-II ......... 5
Precautions for Brake Control .................................. 6
Precautions for CAN System ................................... 6
Wiring Diagrams and Trouble Diagnosis .................. 7
PREPARATION ........................................................... 8
Special Service Tool ................................................. 8
Commercial Service Tools ........................................ 8
SYSTEM DESCRIPTION ............................................ 9
System Components ................................................ 9
ABS Function ........................................................... 9
EBD Function ........................................................... 9
Fail-Safe Function .................................................... 9
ABS/EBD SYSTEM ............................................... 9
Hydraulic Circuit Diagram ...................................... 10
CAN COMMUNICATION ...........................................11
System Description .................................................11
TROUBLE DIAGNOSIS ............................................ 12
How to Perform Trouble Diagnoses for Quick and
Accurate Repair ..................................................... 12
INTRODUCTION ................................................. 12
WORK FLOW ...................................................... 13
CLARIFY CONCERN .......................................... 14
EXAMPLE OF DIAGNOSIS SHEET ................... 14
Component Parts and Harness Connector Location... 15
Schematic .............................................................. 16
Wiring Diagram — ABS — ..................................... 17
Basic Inspection ..................................................... 21
BRAKE FLUID LEVEL, FLUID LEAK, AND
BRAKE PAD INSPECTION ................................. 21
POWER SYSTEM TERMINAL LOOSENESS
AND BATTERY INSPECTION ............................ 21
ABS WARNING LAMP INSPECTION ................. 21
Warning Lamp and Indicator Timing ...................... 22
Revision: February 2006

Control Unit Input/Output Signal Standard ............. 22
REFERENCE VALUE FROM CONSULT-II ......... 22
CONSULT-II Function (ABS) .................................. 24
CONSULT-II BASIC OPERATION PROCEDURE
... 24
SELF-DIAGNOSIS .............................................. 25
DATA MONITOR ................................................. 27
ACTIVE TEST ..................................................... 28
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ITEMS ........................................................................ 30
Wheel Sensor System ............................................ 30
ABS Control Unit Inspection ................................... 31
Solenoid Valve System Inspection ......................... 32
Actuator Motor, Motor Relay, and Circuit Inspection... 33
ABS Control Unit Power and Ground Systems
Inspection ............................................................... 34
CAN Communication System Inspection ................ 34
TROUBLE DIAGNOSES FOR SYMPTOMS ............ 35
ABS Works Frequently ........................................... 35
Unexpected Pedal Action ....................................... 36
Long Stopping Distance .......................................... 37
ABS Does Not Work ............................................... 37
Pedal Vibration or ABS Operation Noise ................ 37
ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On ........................................ 38
ABS Warning Lamp Stays On When Ignition Switch
Is Turned On ........................................................... 38
WHEEL SENSORS ................................................... 39
Removal and Installation ........................................ 39
REMOVAL ........................................................... 39
INSTALLATION ................................................... 39
SENSOR ROTOR ..................................................... 40
Removal and Installation ........................................ 40
FRONT ................................................................ 40
REAR (C200) ...................................................... 40
REAR (M226) ...................................................... 40
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)... 41
Removal and Installation ........................................ 41
REMOVAL ........................................................... 41
INSTALLATION ................................................... 42

BRC-1

2005 Xterra

BRC

ABLS/ABS
PRECAUTIONS ......................................................... 43
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER” ................................................................. 43
Precautions for Brake System ................................ 43
Precautions When Using CONSULT-II ................... 43
CHECK POINTS FOR USING CONSULT-II ........ 43
Precautions for Brake Control ................................ 44
Precautions for CAN System .................................. 44
Wiring Diagrams and Trouble Diagnosis ................ 45
PREPARATION ......................................................... 46
Special Service Tool ............................................... 46
Commercial Service Tools ...................................... 46
SYSTEM DESCRIPTION .......................................... 47
System Components .............................................. 47
ABS Function .......................................................... 48
EBD Function ......................................................... 48
ABLS Function ........................................................ 48
Fail-Safe Function .................................................. 48
ABS/EBD SYSTEM ............................................. 48
ABLS SYSTEM .................................................... 48
Hydraulic Circuit Diagram ....................................... 49
CAN COMMUNICATION ........................................... 50
System Description ................................................. 50
TROUBLE DIAGNOSIS ............................................ 51
How to Perform Trouble Diagnoses for Quick and
Accurate Repair ...................................................... 51
INTRODUCTION ................................................. 51
WORK FLOW ...................................................... 52
CLARIFY CONCERN .......................................... 53
EXAMPLE OF DIAGNOSIS SHEET .................... 53
Component Parts and Harness Connector Location... 54
Schematic ............................................................... 55
Wiring Diagram — ABLS — ................................... 56
Basic Inspection ..................................................... 60
BRAKE FLUID LEVEL, FLUID LEAK, AND
BRAKE PAD INSPECTION ................................. 60
POWER SYSTEM TERMINAL LOOSENESS
AND BATTERY INSPECTION ............................. 60
ABS WARNING LAMP AND SLIP INDICATOR
LAMP INSPECTION ............................................ 60
Warning Lamp and Indicator Timing ....................... 61
Control Unit Input/Output Signal Standard .............. 61
REFERENCE VALUE FROM CONSULT-II ......... 61
CONSULT-II Function (ABS) .................................. 64
CONSULT-II BASIC OPERATION PROCEDURE
... 64
SELF-DIAGNOSIS .............................................. 65
DATA MONITOR .................................................. 68
ACTIVE TEST ..................................................... 70
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ITEMS ........................................................................ 72
Wheel Sensor System Inspection ........................... 72
Engine System Inspection ...................................... 73
ABS/ABLS Control Unit Inspection ......................... 74
Solenoid and Change-Over Valve System Inspection .......................................................................... 74
Revision: February 2006

Actuator Motor, Motor Relay, and Circuit Inspection...75
Stop Lamp Switch System Inspection .....................76
ABS/ABLS Control Unit Power and Ground Systems Inspection .......................................................77
Brake Fluid Level Switch System Inspection ..........78
Pressure Sensor System Inspection .......................78
CAN Communication System Inspection ................80
TROUBLE DIAGNOSES FOR SYMPTOMS .............81
ABS Works Frequently ............................................81
Unexpected Pedal Action ........................................82
Long Stopping Distance ..........................................83
ABS Does Not Work ...............................................83
Pedal Vibration or ABS Operation Noise ................83
ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On .........................................84
ABS Warning Lamp Stays On When Ignition Switch
Is Turned On ...........................................................84
WHEEL SENSORS ...................................................85
Removal and Installation .........................................85
REMOVAL ............................................................85
INSTALLATION ....................................................85
SENSOR ROTOR ......................................................86
Removal and Installation .........................................86
FRONT .................................................................86
REAR (C200) .......................................................86
REAR (M226) .......................................................86
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY) ...87
Removal and Installation .........................................87
REMOVAL ............................................................87
INSTALLATION ....................................................88

VDC/TCS/ABS
PRECAUTIONS .........................................................89
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER” .................................................................89
Precautions for Brake System ................................89
Precautions When Using CONSULT-II ...................89
CHECK POINTS FOR USING CONSULT-II ........89
Precautions for Brake Control .................................90
Precautions for CAN System ..................................91
Wiring Diagrams and Trouble Diagnosis .................91
PREPARATION .........................................................92
Special Service Tool ................................................92
Commercial Service Tools ......................................92
SYSTEM DESCRIPTION ...........................................93
System Components ...............................................93
ABS Function ..........................................................94
EBD Function ..........................................................94
TCS Function ..........................................................94
VDC Function ..........................................................94
Fail-Safe Function ...................................................94
ABS/EBD SYSTEM ..............................................95
VDC/TCS SYSTEM .............................................95
Hydraulic Circuit Diagram .......................................95
CAN COMMUNICATION ...........................................96
System Description .................................................96

BRC-2

2005 Xterra

TROUBLE DIAGNOSIS ............................................ 97
How to Perform Trouble Diagnoses for Quick and
Accurate Repair ..................................................... 97
INTRODUCTION ................................................. 97
WORK FLOW ...................................................... 98
CLARIFY CONCERN .......................................... 99
EXAMPLE OF DIAGNOSIS SHEET ................... 99
Component Parts and Harness Connector Location. 100
Schematic ............................................................ 101
Wiring Diagram — VDC — ................................... 102
Basic Inspection ................................................... 109
BRAKE FLUID LEVEL, FLUID LEAK, AND
BRAKE PAD INSPECTION ............................... 109
POWER SYSTEM TERMINAL LOOSENESS
AND BATTERY INSPECTION .......................... 109
ABS WARNING LAMP, SLIP INDICATOR LAMP
AND VDC OFF INDICATOR LAMP INSPECTION. 109
For Fast and Accurate Diagnosis ..........................110
PRECAUTIONS FOR DIAGNOSIS ....................110
Warning Lamp and Indicator Timing ..................... 111
Control Unit Input/Output Signal Standard ............ 111
REFERENCE VALUE FROM CONSULT-II ........ 111
CONSULT-II Function (ABS) .................................114
CONSULT-II BASIC OPERATION PROCEDURE
..114
SELF-DIAGNOSIS .............................................115
DATA MONITOR ................................................118
ACTIVE TEST ................................................... 121
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ITEMS ..................................................................... 123
Wheel Sensor System Inspection ........................ 123
Engine System Inspection .................................... 124
ABS/TCS/VDC Control Unit Inspection ................ 125
Steering Angle Sensor System ............................ 125
Yaw Rate/Side/Decel G Sensor System Inspection. 127
Solenoid and VDC Change-Over Valve System
Inspection ............................................................. 129
Actuator Motor, Motor Relay, and Circuit Inspection. 130
Stop Lamp Switch System Inspection .................. 131
ABS/TCS/VDC Control Unit Power and Ground
Systems Inspection .............................................. 132
Brake Fluid Level Sensor System Inspection ....... 133
Pressure Sensor System Inspection .................... 133
Steering Angle Sensor Safe Mode Inspection ...... 134
CAN Communication System Inspection ............. 135
Inspection For Self-diagnosis Result "ST ANGLE
SEN SIGNAL" ...................................................... 135
Inspection For Self-diagnosis Result "DECEL G
SEN SET" ............................................................. 136
VDC OFF Indicator lamp Does Not Illuminate ..... 136
Component Inspection ......................................... 136
VDC OFF SWITCH ........................................... 136
TROUBLE DIAGNOSES FOR SYMPTOMS .......... 137
ABS Works Frequently ......................................... 137
Unexpected Pedal Action ..................................... 138
Long Stopping Distance ....................................... 139
ABS Does Not Work ............................................. 139
Pedal Vibration or ABS Operation Noise ............. 139
ABS Warning Lamp Does Not Come On When IgniRevision: February 2006

tion Switch Is Turned On ...................................... 140
ABS Warning Lamp Stays On When Ignition Switch
Is Turned On ......................................................... 140
Vehicle Jerks During TCS/VDC Activation ........... 141
ON-VEHICLE SERVICE .......................................... 142
Adjustment of Steering Angle Sensor Neutral Position ........................................................................ 142
WITH CONSULT-II ............................................ 142
WITHOUT CONSULT-II ..................................... 142
Calibration of Decel G Sensor .............................. 142
WHEEL SENSORS ................................................. 144
Removal and Installation ...................................... 144
REMOVAL ......................................................... 144
INSTALLATION ................................................. 144
SENSOR ROTOR ................................................... 145
Removal and Installation ...................................... 145
FRONT .............................................................. 145
REAR (C200) .................................................... 145
REAR (M226) .................................................... 145
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY). 146
Removal and Installation ...................................... 146
REMOVAL ......................................................... 146
INSTALLATION ................................................. 147
STEERING ANGLE SENSOR ................................ 148
Removal and Installation ...................................... 148
G SENSOR .............................................................. 149
Removal and Installation ...................................... 149
REMOVAL ......................................................... 149
INSTALLATION ................................................. 149

HDC/HSA/VDC/TCS/ABS

BRC

PRECAUTIONS ...................................................... 150
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER” ............................................................... 150
Precautions for Brake System .............................. 150
Precautions When Using CONSULT-II ................. 150
CHECK POINTS FOR USING CONSULT-II ...... 150
Precautions for Brake Control .............................. 151
Precautions for CAN System ................................ 152
Wiring Diagrams and Trouble Diagnosis .............. 152
PREPARATION ....................................................... 153
Special Service Tool ............................................. 153
Commercial Service Tools .................................... 153
SYSTEM DESCRIPTION ........................................ 154
System Components ............................................ 154
ABS Function ........................................................ 155
EBD Function ....................................................... 155
TCS Function ........................................................ 155
VDC Function ....................................................... 155
HDC Function ....................................................... 155
HSA Function ....................................................... 156
Fail-Safe Function ................................................ 156
ABS/EBD SYSTEM ........................................... 156
HDC/HSA SYSTEM .......................................... 156
VDC/TCS SYSTEM ........................................... 156
Hydraulic Circuit Diagram ..................................... 157

BRC-3

2005 Xterra

CAN COMMUNICATION ......................................... 158
System Description ............................................... 158
TROUBLE DIAGNOSIS .......................................... 159
How to Perform Trouble Diagnoses for Quick and
Accurate Repair .................................................... 159
INTRODUCTION ............................................... 159
WORK FLOW .................................................... 160
CLARIFY CONCERN ........................................ 161
EXAMPLE OF DIAGNOSIS SHEET .................. 161
Component Parts and Harness Connector Location. 162
Schematic ............................................................. 163
Wiring Diagram — VDC — ................................... 164
Basic Inspection ................................................... 171
BRAKE FLUID LEVEL, FLUID LEAK, AND
BRAKE PAD INSPECTION ............................... 171
POWER SYSTEM TERMINAL LOOSENESS
AND BATTERY INSPECTION ........................... 171
ABS WARNING LAMP, SLIP INDICATOR LAMP,
VDC OFF INDICATOR LAMP AND HDC INDICATOR LAMP INSPECTION ............................. 171
For Fast and Accurate Diagnosis ......................... 172
PRECAUTIONS FOR DIAGNOSIS ................... 172
Warning Lamp and Indicator Timing ..................... 173
Control Unit Input/Output Signal Standard ............ 173
REFERENCE VALUE FROM CONSULT-II ....... 173
CONSULT-II Function (ABS) ................................ 177
CONSULT-II BASIC OPERATION PROCEDURE
. 177
SELF-DIAGNOSIS ............................................ 178
DATA MONITOR ................................................ 181
ACTIVE TEST ................................................... 184
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ITEMS ...................................................................... 187
Wheel Sensor System Inspection ......................... 187
Engine System Inspection .................................... 188
ABS/TCS/VDC Control Unit Inspection ................ 189
Steering Angle Sensor System ............................. 189
Yaw Rate/Side/Decel G Sensor System Inspection. 191
Solenoid and VDC Change-Over Valve System
Inspection ............................................................. 193
Actuator Motor, Motor Relay, and Circuit Inspection. 194
Stop Lamp Switch System Inspection .................. 195
ABS/TCS/VDC Control Unit Power and Ground
Systems Inspection .............................................. 196
Brake Fluid Level Sensor System Inspection ....... 197
Active Booster System Inspection ........................ 198
Pressure Sensor System Inspection .................... 199

Revision: February 2006

Steering Angle Sensor Safe Mode Inspection ...... 202
CAN Communication System Inspection .............. 202
Inspection For Self-diagnosis Result "ST ANGLE
SEN SIGNAL" ....................................................... 203
Inspection For Self-diagnosis Result "DECEL G
SEN SET" ............................................................. 203
VDC OFF Indicator lamp Does Not Illuminate ...... 203
Component Inspection .......................................... 204
VDC OFF SWITCH ............................................ 204
HDS SWITCH .................................................... 204
TROUBLE DIAGNOSES FOR SYMPTOMS ........... 205
ABS Works Frequently .......................................... 205
Unexpected Pedal Action ...................................... 206
Long Stopping Distance ........................................ 207
ABS Does Not Work ............................................. 207
Pedal Vibration or ABS Operation Noise .............. 207
ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On ....................................... 208
ABS Warning Lamp Stays On When Ignition Switch
Is Turned On ......................................................... 208
Vehicle Jerks During TCS/VDC Activation ............ 209
Stop Lamp Relay Inspection ................................. 210
HDC Switch Inspection ......................................... 210
ON-VEHICLE SERVICE .......................................... 212
Adjustment of Steering Angle Sensor Neutral Position ........................................................................ 212
WITH CONSULT-II ............................................. 212
WITHOUT CONSULT-II ..................................... 212
Calibration of Decel G Sensor .............................. 212
WHEEL SENSORS ................................................. 214
Removal and Installation ....................................... 214
REMOVAL .......................................................... 214
INSTALLATION .................................................. 214
SENSOR ROTOR .................................................... 215
Removal and Installation ....................................... 215
FRONT ............................................................... 215
REAR ................................................................. 215
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY) .216
Removal and Installation ....................................... 216
REMOVAL .......................................................... 216
INSTALLATION .................................................. 217
STEERING ANGLE SENSOR ................................. 218
Removal and Installation ....................................... 218
G SENSOR .............................................................. 219
Removal and Installation ....................................... 219
REMOVAL .......................................................... 219
INSTALLATION .................................................. 219

BRC-4

2005 Xterra

PRECAUTIONS
[ABS]

PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”

EFS005U1

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along B
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front C
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Manual.
D
WARNING:
●
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer.
E
●
Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
BRC
●
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
G

Precautions for Brake System

EFS005KN

CAUTION:
●
Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS" for recommended brake fluid.
●
Never reuse drained brake fluid.
●
Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is
splashed on painted areas, wash it away with water immediately.
●
To clean or wash all parts of master cylinder and disc brake caliper, use clean brake fluid.
●
Never use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic
system.
●
Use flare nut wrench when removing and installing brake
tube.
●
If a brake fluid leak is found, the part must be disassembled
without fail. Then it has to be replaced with a new one if a
defect exists.
●
Turn the ignition switch OFF and remove the connector of
the ABS actuator and electric unit (control unit) or the battery terminal before performing the work.
●
Always torque brake lines when installing.
●
Burnish the brake contact surfaces after refinishing or
SBR686C
replacing rotors, after replacing pads, or if a soft pedal
occurs at very low mileage.
Refer to BR-27, "BRAKE BURNISHING PROCEDURE" (front disc brake) or BR-32, "BRAKE BURNISHING PROCEDURE" (rear disc brake).
WARNING:
●
Clean brake pads and shoes with a waste cloth, then wipe with a dust collector.

Precautions When Using CONSULT-II

EFS005KO

When connecting CONSULT-II to data link connector, connect them through CONSULT-II CONVERTER.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.

CHECK POINTS FOR USING CONSULT-II
1.

Has CONSULT-II been used without connecting CONSULT-II CONVERTER on this vehicle?
● If YES, GO TO 2.

Revision: February 2006

BRC-5

2005 Xterra

PRECAUTIONS
[ABS]
If NO, GO TO 5.
Is there any indication other than indications relating to CAN communication system in the self-diagnosis
results?
● If YES, GO TO 3.
● If NO, GO TO 4.
Based on self-diagnosis results unrelated to CAN communication, carry out the inspection.
Malfunctions may be detected in self-diagnosis depending on control units carrying out CAN communication. Therefor, erase the self-diagnosis results.
Diagnose CAN communication system. Refer to LAN-21, "CAN COMMUNICATION" .
●

3.
4.
5.

Precautions for Brake Control
●
●
●
●
●

●
●
●

EFS005KP

During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.
During HDC operation, a mechanical noise may be heard. This is normal.
Just after starting vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check.
Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
When an error is indicated by ABS or another warning lamp, collect all necessary information from customer (what symptoms are present under what conditions) and check for simple causes before starting
diagnosis. Besides electrical system inspection, check brake booster operation, brake fluid level, and fluid
leaks.
If incorrect tire sizes or types are installed on the vehicle or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.
If there is a radio, antenna or related wiring near control module, ABS function may have a malfunction or
error.
If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits or improper wiring.

Precautions for CAN System
●
●
●
●

EFS005KQ

Do not apply voltage of 7.0V or higher to terminal to be measured.
Maximum open terminal voltage of tester in use must be less than 7.0V.
Before checking harnesses, turn ignition switch OFF and disconnect battery negative cable.
Area to be repaired must be soldered and wrapped with tape.
Make sure that fraying of twisted wire is within 110 mm (4.33 in).

PKIA0306E

Revision: February 2006

BRC-6

2005 Xterra

PRECAUTIONS
[ABS]
●

Do not make a bypass connection to repaired area. (If the circuit
is bypassed, characteristics of twisted wire will be lost.)

C
PKIA0307E

Wiring Diagrams and Trouble Diagnosis

D
EFS005KR

When you read wiring diagrams, refer to the following:
●
GI-16, "How to Read Wiring Diagrams".
●
PG-4, "POWER SUPPLY ROUTING CIRCUIT".
When you perform trouble diagnosis, refer to the following:
●
GI-12, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES".
●
GI-28, "How to Perform Efficient Diagnosis for an Electrical Incident".

BRC

Revision: February 2006

BRC-7

2005 Xterra

PREPARATION
[ABS]

PREPARATION
Special Service Tool

PFP:00002
EFS005KS

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name

Description

—
(J-45741)
ABS active wheel sensor tester

Checking operation of ABS active wheel
sensors

WFIA0101E

205-D002
(
—
)
Bearing splitter

Removing axle shaft bearing

ZZA0700D

Commercial Service Tools

EFS005KT

Tool name

Description

1. Flare nut crowfoot
2. Torque wrench

Removing and installing brake piping
a: 10mm (0.39 in)/12mm (0.47 in)

S-NT360

Revision: February 2006

BRC-8

2005 Xterra

SYSTEM DESCRIPTION
[ABS]

SYSTEM DESCRIPTION
System Components

PFP:00000

A
EFS005KU

BRC

WFIA0360E

ABS Function
●

●
●
●
●
●

EFS005KV

The Anti-Lock Brake System detects wheel revolution while braking and improves handling stability during
sudden braking by electrically preventing wheel lockup. Maneuverability is also improved for avoiding
obstacles.
If the electrical system malfunctions, the Fail-Safe function is activated, the ABS becomes inoperative and
the ABS warning lamp turns on.
The electrical system can be diagnosed using CONSULT-II.
During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.
Just after starting the vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check.
Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.

EBD Function
●

●
●
●
●

EFS005KW

Electronic Brake Distribution is a function that detects subtle slippages between the front and rear wheels
during braking, and it improves handling stability by electronically controlling the brake fluid pressure
which results in reduced rear wheel slippage.
If the electrical system malfunctions, the Fail-Safe function is activated, the EBD and ABS become inoperative, and the ABS warning lamp and brake warning lamp are turned on.
The electrical system can be diagnosed using CONSULT-II.
During EBD operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.
Just after starting the vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check.

Fail-Safe Function

EFS005KX

CAUTION:
If the Fail-Safe function is activated, perform the Self Diagnosis for ABS system.

BRC-9

2005 Xterra

SYSTEM DESCRIPTION
[ABS]
1.
2.

For ABS malfunction, only the EBD is operative and the condition of the vehicle is the same condition of
vehicles without ABS system.
For EBD malfunction, the EBD and ABS become inoperative, and the condition of the vehicle is the same
as the condition of vehicles without ABS or EBD system.

Hydraulic Circuit Diagram

EFS005KY

WFIA0369E

Inlet solenoid valve

Outlet solenoid valve

Reservoir

Pump

Motor

Inlet valve

Outlet valve

Bypass check valve

Damper

10. Pressure switch

Revision: February 2006

BRC-10

2005 Xterra

CAN COMMUNICATION
[ABS]

CAN COMMUNICATION
System Description

PFP:23710

A
EFS005KZ

Refer to LAN-21, "CAN COMMUNICATION" .
B

BRC

Revision: February 2006

BRC-11

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]

TROUBLE DIAGNOSIS
How to Perform Trouble Diagnoses for Quick and Accurate Repair

PFP:00000
EFS005L0

INTRODUCTION
The ABS system has an electronic control unit to control major functions. The control unit accepts input signals from sensors and controls actuator operation. It is also important to check for conventional
problems such as air leaks in the booster or lines, lack of brake fluid,
or other problems with the brake system.
It is much more difficult to diagnose a problem that occurs intermittently rather than continuously. Most intermittent problems are
caused by poor electrical connections or faulty wiring. In this case,
careful checking of suspicious circuits may help prevent the replacement of good parts.
A visual check only may not find the cause of the problem, so a road
test should be performed.
Before undertaking actual checks, take just a few minutes to talk with
a customer who approaches with an ABS complaint. The customer
is a very good source of information on such problems, especially
intermittent ones. Through the talks with the customer, find out what
symptoms are present and under what conditions they occur.
Start your diagnosis by looking for “conventional” problems first. This
is one of the best ways to troubleshoot brake problems on an ABS
equipped vehicle. Also check related Service Bulletins for information.

SEF233G

SEF234G

Revision: February 2006

BRC-12

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]
WORK FLOW
A

BRC

LFIA0197E

Revision: February 2006

BRC-13

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]
CLARIFY CONCERN
●

●

A customer's description of a vehicle concern may vary depending on the individual. It is important to clarify the customer's concern.
Ask the customer about what symptoms are present under what
conditions. Use this information to reproduce the symptom while
driving.
It is also important to use the diagnosis sheet to understand
what type of trouble the customer is having.

SBR339B

EXAMPLE OF DIAGNOSIS SHEET

WFIA0226E

Revision: February 2006

BRC-14

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]

Component Parts and Harness Connector Location

EFS005L1

BRC

WFIA0361E

Revision: February 2006

BRC-15

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]

Schematic

EFS005L2

WFWA0229E

Revision: February 2006

BRC-16

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]

Wiring Diagram — ABS —

EFS005L3

BRC

WFWA0230E

Revision: February 2006

BRC-17

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]

WFWA0231E

Revision: February 2006

BRC-18

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]
A

BRC

WFWA0232E

Revision: February 2006

BRC-19

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]

WFWA0233E

Revision: February 2006

BRC-20

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]

Basic Inspection

EFS005L4

A
Check fluid level in the brake fluid reservoir. If fluid level is low, add fluid.
Check the brake piping and around the ABS actuator and electric unit (control unit) for leaks. If there is
B
leaking or seeping fluid, check the following items.
● If ABS actuator and electric unit (control unit) connection is loose, tighten the piping to the specified
torque and recheck for leaks.
C
● If there is damage to the connection flare nut or ABS actuator and electric unit (control unit) threads,
replace the damaged part and recheck for leaks.
● When there is fluid leaking or seeping from a fluid connection, use a clean cloth to wipe off the fluid and
recheck for leaks. If fluid is still seeping out, replace the damaged part. If the fluid is leaking at the ABS D
actuator and electric unit (control unit), replace the ABS actuator and electric unit (control unit) assembly.
CAUTION:
E
The ABS actuator and electric unit (control unit) cannot be disassembled and must be replaced
as an assembly.
Check the brake pads for excessive wear.
BRC

BRAKE FLUID LEVEL, FLUID LEAK, AND BRAKE PAD INSPECTION
1.
2.

POWER SYSTEM TERMINAL LOOSENESS AND BATTERY INSPECTION
Make sure the battery positive cable, negative cable and ground connection are not loose. In addition, make
sure the battery is sufficiently charged.

ABS WARNING LAMP INSPECTION
1.

2.
3.

Make sure ABS warning lamp turns on for approximately 2 seconds when the ignition switch is turned ON.
If it does not, check CAN communications. If there are no errors with the CAN communication system,
check the combination meter. Refer to DI-4, "COMBINATION METERS" .
Make sure the lamp turns off approximately 2 seconds after the ignition switch is turned ON. If the lamp
does not turn off, conduct self-diagnosis.
Make sure ABS warning lamp turns off approximately 2 seconds after the engine is started. If ABS warning lamp has not turned off 10 seconds after the engine has been started, conduct self-diagnosis of the
ABS actuator and electric unit (control unit).
After conducting the self-diagnosis, be sure to erase the error memory. Refer to BRC-24, "CONSULT-II
Function (ABS)" .

Revision: February 2006

BRC-21

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]

Warning Lamp and Indicator Timing

EFS005L5

ABS
warning lamp

Remarks

When the ignition switch is OFF

–

After the ignition switch is turned ON for approx. 1 second

–

After the ignition switch is turned ON for approx. 2 seconds

–

Condition

ABS malfunction

Lamp goes off approx. 2 seconds after the
engine is started.

–

When the ABS actuator and electric unit (control unit) is malfunctioning (power supply or
ground malfunction).

X: ON
—: OFF

Control Unit Input/Output Signal Standard

EFS005L6

REFERENCE VALUE FROM CONSULT-II
CAUTION:
The display shows the control unit calculation data, so a normal value might be displayed even in the
event the output circuit (harness) is open or short circuited.
Data monitor
Monitor item

Display content
Condition

FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSOR

Wheel speed

BATTERY VOLT

Battery voltage supplied to ABS actuator
and electric unit (control unit)

CRANKING SIG

Cranking status

STOP LAMP SW

Stop lamp switch operation

ABS WARN LAMP

ABS warning lamp ON
condition (Note 2)

EBD WARN LAMP

MOTOR RELAY

ACTUATOR RLY

EBD warning lamp status

Operation status of
motor and motor relay

Actuator relay operation status

Revision: February 2006

Reference value in
normal operation

Vehicle stopped

0 [km/h (MPH)]

Vehicle running (Note 1)

Almost in accordance with speedometer display
(within ±10%)

Ignition switch ON

10 to 16V

Cranking

Not cranking

OFF

Brake pedal depressed

Brake pedal not depressed

OFF

ABS warning lamp ON

ABS warning lamp OFF

OFF

When EBD warning lamp is on

When EBD warning lamp is off

OFF

Ignition switch ON or running
(ABS not activated)

OFF

Ignition switch ON or engine
running (ABS activated)

Vehicle stopped (Ignition
switch ON)

OFF

Vehicle stopped (Engine running)

BRC-22

Note: Error inspection
checklist

BRC-30, "Wheel Sensor
System"

BRC-34, "ABS Control
Unit Power and Ground
Systems Inspection"
—

—
BRC-38, "ABS Warning
Lamp Does Not Come
On When Ignition Switch
Is Turned On"
BRC-34, "CAN Communication System Inspection"
BRC-33, "Actuator Motor,
Motor Relay, and Circuit
Inspection"

BRC-33, "Actuator Motor,
Motor Relay, and Circuit
Inspection"

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]
Data monitor
Monitor item

FR LH IN SOL
FR LH OUT SOL
FR RH IN SOL
FR RH OUT SOL
REAR IN SOL
REAR OUT SOL

ABS SIGNAL
EBD SIGNAL

ABS FAIL SIG
EBD FAIL SIG

Display content

Solenoid valve operation

Signal status

Fail signal status

Condition

Reference value in
normal operation

Actuator (solenoid) is active
(“ACTIVE TEST” with CONSULT-II) or actuator relay is
inactive (in fail-safe mode).

When actuator (solenoid) is
not active and actuator relay is
active (ignition switch ON).

OFF

ABS active
EBD active

ABS not active
EBD not active

OFF

ABS fail
EBD fail

ABS normal
EBD normal

OFF

Note: Error inspection
checklist

B
BRC-32, "Solenoid Valve
System Inspection"

D
ABS system
EBD system

E
ABS system
EBD system

BRC

Revision: February 2006

BRC-23

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]

CONSULT-II Function (ABS)

EFS005L7

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
ABS diagnostic mode
WORK SUPPORT
SELF-DIAG RESULTS
DATA MONITOR

Description
Supports inspection and adjustments. Commands are transmitted to the ABS actuator and electric
unit (control unit) for setting the status suitable for required operation, input/output signals are
received from the ABS actuator and electric unit (control unit) and received data is displayed.
Displays ABS actuator and electric unit (control unit) self-diagnosis results.
Displays ABS actuator and electric unit (control unit) input/output data in real time.

CAN DIAG SUPPORT MNTR

The result of transmit/receive diagnosis of CAN communication can be read.

ACTIVE TEST

Operation of electrical loads can be checked by sending drive signal to them.

FUNCTION TEST
ECU PART NUMBER

Conducted by CONSULT-II instead of a technician to determine whether each system is "OK" or
"NG".
ABS actuator and electric unit (control unit) part number can be read.

CONSULT-II BASIC OPERATION PROCEDURE
1.
2.

Turn ignition switch OFF.
Connect CONSULT-II and CONSULT-II CONVERTER to the
data link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II
CONVERTER, malfunctions might be detected in self-diagnosis depending on control unit which carries out CAN
communication.
Turn ignition switch ON.

BBIA0538E

Touch “START (NISSAN BASED VHCL)”.

BCIA0029E

Touch “ABS” in the “SELECT SYSTEM” screen.
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link
Connector (DLC) Circuit" .

BCIA0030E

Revision: February 2006

BRC-24

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]
6.

Select the required diagnostic location from the “SELECT DIAG
MODE” screen.
For further information, see the CONSULT-II Operation Manual.

C
BCIA0031E

SELF-DIAGNOSIS
Description
If an error is detected in the system, the ABS warning lamp will turn on. In this case, perform self-diagnosis as
follows:

Operation Procedure
1.
2.

Turn ignition switch OFF.
BRC
Connect CONSULT-II and CONSULT-II CONVERTER to the data link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be G
detected in self-diagnosis depending on control unit which carries out CAN communication.

3.
4.
5.

Turn ignition switch ON.
Start engine and drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
After stopping the vehicle, with the engine running, touch “START (NISSAN BASED VHCL)”, “ABS”,
“SELF-DIAG RESULTS” in order on the CONSULT-II screen.
CAUTION:
If “START (NISSAN BASED VHCL)” is touched immediately after starting the engine or turning on
the ignition switch, “ABS” might not be displayed in the SELECT SYSTEM screen. In this case,
repeat the operation from step 1.
6. The self-diagnostic results are displayed. (If necessary, the self-diagnostic results can be printed out by
touching “PRINT”.)
● When “NO DTC IS DETECTED” is displayed, check the ABS warning lamp.
7. Conduct the appropriate inspection from the display item list, and repair or replace the malfunctioning
component.
8. Start engine and drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
CAUTION:
● When a wheel sensor “short-circuit” is detected, if the vehicle is not driven at 30 km/h (19 MPH)
for at least 1 minute, the ABS warning lamp will not turn off even if the malfunction is repaired.
9. Turn ignition switch OFF to prepare for erasing the memory.
10. Start the engine and touch “START (NISSAN BASED VHCL)”, “ABS”, “SELF-DIAG RESULTS”, “ERASE”
in order on the CONSULT-II screen to erase the error memory.
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link Connector (DLC) Circuit" .
CAUTION:
If the error memory is not erased, re-conduct the operation from step 5.
11. For the final inspection, drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute and
confirm that the ABS warning lamp is off.

Revision: February 2006

BRC-25

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]
Display Item List
Self-diagnostic item

Malfunction detecting condition

Check system

FR LH SENSOR 1
[C1104]

Circuit of front LH wheel sensor is open, shorted or sensor power
voltage is unusual.

RR RH SENSOR 1
[C1101]

Circuit of rear RH wheel sensor is open, shorted or sensor power
voltage is unusual.

FR RH SENSOR 1
[C1103]

Circuit of front RH wheel sensor is open, shorted or sensor power
voltage is unusual.

RR LH SENSOR 1
[C1102]

Circuit of rear LH wheel sensor is open, shorted or sensor power
voltage is unusual.

FR LH SENSOR 2
[C1108]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

RR RH SENSOR 2
[C1105]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

FR RH SENSOR 2
[C1107]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

RR LH SENSOR 2
[C1106]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

ABS SENSOR
[C1115]

Wheel sensor input is abnormal.

BATTERY VOLTAGE
[ABNORMAL]
[C1109]

ABS actuator and electric unit (control unit) power voltage is too
low.

BRC-34, "ABS Control
Unit Power and Ground
Systems Inspection"

CONTROLLER FAILURE
[C1110]

Internal malfunction of ABS actuator and electric unit (control
unit)

BRC-31, "ABS Control
Unit Inspection"

PUMP MOTOR (Note 3)
[C1111]

During actuator motor operation with ON, when actuator motor
turns OFF or when control line for actuator motor relay is open.
During actuator motor operation with OFF, when actuator motor
turns ON or when control line for relay is shorted to ground.

G-SENSOR
[C1113]

G-sensor is malfunctioning.

FR LH IN ABS SOL
[C1120]

Circuit of front LH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

FR LH OUT ABS SOL
[C1121]

Circuit of front LH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

FR RH IN ABS SOL
[C1122]

Circuit of front RH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

FR RH OUT ABS SOL
[C1123]

Circuit of front RH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

R-EV
[C1190]

Circuit of rear IN ABS solenoid is open or shorted, or control line
is open or shorted to power supply or ground.

R-AV
[C1191]

Circuit of rear OUT ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

ACTUATOR RLY
[C1140]

ABS actuator relay or circuit malfunction.

Revision: February 2006

BRC-26

BRC-30, "Wheel Sensor
System" (Note 1)

BRC-33, "Actuator
Motor, Motor Relay, and
Circuit Inspection"
BRC-31, "ABS Control
Unit Inspection"

BRC-32, "Solenoid Valve
System Inspection"

BRC-33, "Actuator
Motor, Motor Relay, and
Circuit Inspection"

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]
Self-diagnostic item
VARIANT CODING
[C1170]

CAN COMM CIRCUIT
[U1000]

Malfunction detecting condition

Check system
BRC-31, "ABS Control
Unit Inspection"

V coding is not malfunctioning.
●

CAN communication line is open or shorted.

●

ABS actuator and electric unit (control unit) internal malfunction

●

Battery voltage for ECM is suddenly interrupted for approximately 0.5 second or more.

BRC-34, "CAN Communication System Inspection" (Note 2)

Note 1. If wheel sensor 2 for each wheel is indicated, check ABS actuator and electric unit (control unit) power
supply voltage in addition to wheel sensor circuit check.
Note 2. If multiple malfunctions are detected including CAN communication line [U1000], perform diagnosis for
CAN communication line first.
Note 3: "ACTUATOR RLY" on the CONSULT-II self-diagnosis results indicates the malfunction of the actuator
motor relay or circuit.

DATA MONITOR
Operation Procedure
1.

3.
4.

After turning OFF the ignition switch, connect CONSULT-II and the CONSULT-II CONVERTER to the data BRC
link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be G
detected in self-diagnosis depending on control unit which carries out CAN communication.
Touch “START (NISSAN BASED VHCL)”, “ABS”, “DATA MONITOR” in order on the CONSULT-II screen.
H
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link Connector (DLC) Circuit" .
CAUTION:
When “START (NISSAN BASED VHCL)” is touched immediately after starting the engine or turning
on the ignition switch, “ABS” might not be displayed in the SELECT SYSTEM screen. In this case,
I
repeat the operation from step 2.
Return to the SELECT MONITOR ITEM screen, and touch “ECU INPUT SIGNALS”, “MAIN SIGNALS” or
“SELECTION FROM MENU”. Refer to the following information.
J
When “START” is touched, the data monitor screen is displayed.

Display Item List
Item
(Unit)

Data monitor item selection
ECU INPUT
SIGNALS

MAIN
SIGNALS

SELECTION
FROM MENU

Remarks

FR RH SENSOR
(km/h, MPH)

Wheel speed calculated by front RH
wheel sensor signal is displayed.

FR LH SENSOR
(km/h, MPH)

Wheel speed calculated by front LH
wheel sensor signal is displayed.

RR RH SENSOR
(km/h, MPH)

Wheel speed calculated by rear RH
wheel sensor signal is displayed.

RR LH SENSOR
(km/h, MPH)

Wheel speed calculated by rear LH
wheel sensor signal is displayed.

BATTERY VOLT
(V)

Voltage supplied to ABS actuator
and electric unit (control unit) is displayed.

STOP LAMP SW
(ON/OFF)

Stop lamp switch (ON/OFF) status
is displayed.

ABS WARN LAMP
(ON/OFF)

–

ABS warning lamp (ON/OFF) status
is displayed.

EBD WARN LAMP

–

Brake warning lamp (ON/OFF) status is displayed.

FR LH IN SOL
(ON/OFF)

–

Front LH IN ABS solenoid (ON/
OFF) status is displayed.

Revision: February 2006

BRC-27

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]
Item
(Unit)

Data monitor item selection
Remarks

ECU INPUT
SIGNALS

MAIN
SIGNALS

SELECTION
FROM MENU

FR LH OUT SOL
(ON/OFF)

–

Front LH OUT ABS solenoid (ON/
OFF) status is displayed.

FR RH IN SOL
(ON/OFF)

–

Front RH IN ABS solenoid (ON/
OFF) status is displayed.

FR RH OUT SOL
(ON/OFF)

–

Front RH OUT ABS solenoid (ON/
OFF) status is displayed.

REAR IN SOL
(ON/OFF)

–

Rear IN ABS solenoid (ON/OFF)
status is displayed.

REAR OUT SOL
(ON/OFF)

–

Rear OUT ABS solenoid (ON/OFF)
status is displayed.

MOTOR RELAY
(ON/OFF)

–

ABS motor relay signal (ON/OFF)
status is displayed.

ACTUATOR RLY
(ON/OFF)

–

ABS actuator relay signal (ON/
OFF) status is displayed.

ABS FAIL SIG
(ON/OFF)

–

ABS fail signal (ON/OFF) status is
displayed.

EBD FAIL SIG
(ON/OFF)

–

EBD fail signal (ON/OFF) status is
displayed.

EBD SIGNAL
(ON/OFF)

–

EBD operation (ON/OFF) status is
displayed.

ABS SIGNAL
(ON/OFF)

–

ABS operation (ON/OFF) status is
displayed.

CRANKING SIG

–

The input state of the key SW
START position signal is displayed.

×: Applicable
–: Not applicable

ACTIVE TEST
CAUTION:
●
Do not perform active test while driving.
●
Make sure to completely bleed air from the brake system.
●
The ABS and brake warning lamps turn on during the active test.

Operation Procedure
1.

2.
3.
4.

Connect the CONSULT-II and CONSULT-II CONVERTER to the data link connector and start the engine.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
Touch “START (NISSAN BASED VHCL)” on the display screen.
Touch “ABS”.
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link Connector (DLC) Circuit" .
Touch “ACTIVE TEST”.

Revision: February 2006

BRC-28

2005 Xterra

TROUBLE DIAGNOSIS
[ABS]
5.
6.

The SELECT TEST ITEM screen is displayed.
Touch necessary test item.

C
LBR379

7.
8.

With the “MAIN SIGNALS” display selected, touch “START”.
The Active Test screen will be displayed, so conduct the following test.
E

Solenoid Valve Operation Chart
ABS solenoid valve

ABS solenoid valve (ACT)

Operation
UP

KEEP

DOWN

ACTUATOR UP

ACTUATOR KEEP

FR RH SOL
FR RH ABS SOLENOID (ACT)

FR RH IN SOL

OFF

FR RH OUT SOL

OFF

ON*

OFF

FR LH SOL
FR LH ABS SOLENOID (ACT)

FR LH IN SOL

OFF

FR LH OUT SOL

OFF

ON*

OFF

REAR IN SOL

OFF

REAR OUT SOL

OFF

ON*

OFF

REAR SOL

*: ON for 1 to 2 seconds after the touch, and then OFF

NOTE:
●
If active test is performed with brake pedal depressed, pedal stroke may change. This is normal.
●
“TEST IS STOPPED” is displayed approximately 10 seconds after operation starts.
●
After “TEST IS STOPPED” is displayed, to perform test again, repeat Step 6.

Touch “ON” and “OFF” on the screen. Check that ABS motor relay
operates as shown in table below.
ON

OFF

ABS actuator relay

ABS motor relay

OFF

NOTE:
●
If active test is performed with brake pedal depressed, pedal
stroke may change. This is normal.
●
“TEST IS STOPPED” is displayed approximately 10 seconds
after operation starts.

Revision: February 2006

ABS Motor

Operation

BRC

BRC-29

SFIA0593E

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABS]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Wheel Sensor System

PFP:00000
EFS005L8

INSPECTION PROCEDURE

1. CONNECTOR INSPECTION
Disconnect the ABS actuator and electric unit (control unit) connector E125 and wheel sensor of malfunctioning code.
Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace as necessary. Refer to BRC-41, "Removal and Installation" .

2. CHECK WHEEL SENSOR OUTPUT SIGNAL
1.
2.

Connect ABS active wheel sensor tester (J-45741) to wheel sensor using appropriate adapter.
Turn on the ABS active wheel sensor tester power switch.
NOTE:
The green POWER indicator should illuminate. If the POWER indicator does not illuminate, replace the
battery in the ABS active wheel sensor tester before proceeding.
3. Spin the wheel of the vehicle by hand and observe the red SENSOR indicator on the ABS active wheel
sensor tester. The red SENSOR indicator should flash on and off to indicate an output signal.
NOTE:
If the red SENSOR indicator illuminates but does not flash, reverse the polarity of the tester leads and
retest.
Does the ABS active wheel sensor tester detect a signal?
YES >> GO TO 3.
NO
>> Replace the wheel sensor. Refer to BRC-39, "Removal and Installation" .

3. CHECK TIRES
Check for inflation pressure, wear and size of each tire.
Are tire pressure and size correct and is tire wear within specifications?
YES >> GO TO 4.
NO
>> Adjust tire pressure or replace tire(s).

4. CHECK WHEEL BEARINGS
Check wheel bearing axial end play. Refer to FAX-5, "WHEEL BEARING INSPECTION" , RAX-6, "Rear Axle
Bearing" (C200) or RAX-18, "Rear Axle Bearing" (M226).
OK or NG
OK
>> GO TO 5.
NG
>> Repair or replace as necessary. Refer to FAX-5, "Removal and Installation" , RAX-12, "Removal
and Installation" (C200) or RAX-23, "Removal and Installation" (M226).

5. CHECK WIRING HARNESS FOR SHORT CIRCUIT
1.
2.

Disconnect ABS actuator and electric unit (control unit) connector and wheel sensor connector of malfunction code No.
Check resistance between wheel sensor harness connector terminals and ground.
Continuity should not exist.

OK or NG
OK
>> GO TO 6.
NG
>> Repair the circuit.
WFIA0343E

Revision: February 2006

BRC-30

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABS]

6. CHECK WIRING HARNESS FOR OPEN CIRCUIT

Check continuity between ABS actuator and electric unit (control unit) harness connector and wheel sensor
harness connector.
ABS actuator and
electric unit (control unit)

Wheel sensor

Connector

Terminal

Connector

45
Front LH

33
E125

Rear LH

C11

2
2

42
Rear RH

Terminal

1
E117

37
36

Continuity
1

E18

34
Front RH

Wheel sensor

Yes

1
2

C10

BRC

Continuity should exist.
OK or NG
OK
>> Replace the ABS actuator and electric unit (control unit). Refer to BRC-41, "Removal and Installation" .
NG
>> Repair the circuit.

ABS Control Unit Inspection

EFS005L9

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK

Check self-diagnosis results.
J

Self-diagnosis results
CONTROLLER FAILURE
G-SENSOR

VARIANT CODING

Is the above displayed in the self-diagnosis display items?
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-41, "Removal and Installation"
.
NO
>> Inspection End.

Revision: February 2006

BRC-31

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABS]

Solenoid Valve System Inspection

EFS005LA

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Self-diagnosis results
FR LH IN ABS SOL
FR LH OUT ABS SOL
FR RH IN ABS SOL
FR RH OUT ABS SOL
R-EV
R-AV

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION
1. Disconnect ABS actuator and electric unit (control unit) connector E125.
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace as necessary.

3.
1.

CHECKING SOLENOID POWER AND GROUND
Check voltage between ABS actuator and electric unit (control
unit) harness connector E125 and body ground.
ABS actuator and electric
unit (control unit) harness
connector E125
32

Body
ground
—

Measured
value
(Approx.)
12V

WFIA0195E

Check resistance between ABS actuator and electric unit (control unit) harness connector E125 and body ground.
ABS actuator and electric
unit (control unit) harness
connector E125
16
47

Body
ground
—
—

Measured
value Ω
(Approx.)
0Ω
0Ω

OK or NG
OK
>> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-41, "Removal and Installation" .
NG
>> Repair the circuit.

Revision: February 2006

BRC-32

WFIA0196E

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABS]

Actuator Motor, Motor Relay, and Circuit Inspection

EFS005LB

INSPECTION PROCEDURE

1. CHECKING SELF-DIAGNOSIS RESULTS
B

Check self-diagnosis results.
Self-diagnosis results

PUMP MOTOR
ACTUATOR RLY

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION

1. Disconnect ABS actuator and electric unit (control unit) connector E125.
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace as necessary.

3.
1.

BRC

CHECKING ABS MOTOR AND MOTOR RELAY POWER SYSTEM
H

Check voltage between ABS actuator and electric unit (control
unit) harness connector E125 and ground.
ABS actuator and electric
unit (control unit) harness
connector E125
1

Body
ground
—

Measured
value
(Approx.)
12V

K
WFIA0209E

Check resistance between ABS actuator and electric unit (control unit) connector E125 and ground.
ABS actuator and electric
unit (control unit)
harness connector E125
16
47

Body
ground
—
—

Measured
value
(Approx.)
0Ω
0Ω

OK or NG
OK
>> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-41, "Removal and Installation" .
NG
>> Repair the circuit.

Revision: February 2006

BRC-33

WFIA0196E

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABS]

ABS Control Unit Power and Ground Systems Inspection

EFS005LC

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Self-diagnosis results
BATTERY VOLTAGE

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION
1. Disconnect the ABS actuator and electric unit (control unit) connector E125.
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace as necessary.

3. ABS CONTROL UNIT POWER AND GROUND CIRCUIT INSPECTION
Measure the voltage and continuity between the ABS actuator and electric unit (control unit) harness connector E125 and ground.
Signal name

ABS actuator and electric unit
(control unit)
harness connector E125

Power supply
Ground

1
32
16
47

Body
ground

Measured value

—

Battery voltage (Approx. 12V)

—

Continuity should exist.

OK or NG
OK
>> Check the battery for loose terminals, low voltage, etc. Repair as necessary.
NG
>> Repair the circuit.

CAN Communication System Inspection

EFS005LD

INSPECTION PROCEDURE

1. CHECK CONNECTOR
1.

Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector and check
the terminals for deformation, disconnection, looseness, and so on. If there is a malfunction, repair or
replace the terminal.
2. Reconnect connector to perform self-diagnosis.
Is "CAN COMM CIRCUIT" displayed in self-diagnosis display items?
YES >> Print out the self-diagnostic results, and refer to LAN-21, "CAN COMMUNICATION" .
NO
>> Connector terminal is loose, damaged, open, or shorted.

Revision: February 2006

BRC-34

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[ABS]

TROUBLE DIAGNOSES FOR SYMPTOMS
ABS Works Frequently

PFP:99999

A
EFS005LE

1. CHECK WARNING LAMP ACTIVATION

Make sure warning lamp remains off while driving.
OK or NG
OK
>> GO TO 2.
NG
>> Carry out self-diagnosis. Refer to BRC-25, "SELF-DIAGNOSIS" .

2. CHECK WHEEL SENSORS
Check the following.
●
Wheel sensor mounting for looseness
●
Wheel sensors for physical damage
●
Wheel sensor connectors for terminal damage or loose connections
●
Sensor rotor and mount for physical damage (rear only)
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace as necessary.

BRC

3. CHECK FRONT AND REAR AXLES

Check front and rear axles for excessive looseness. Refer to FAX-5, "WHEEL BEARING INSPECTION" ,
RAX-6, "Rear Axle Bearing" (C200) or RAX-18, "Rear Axle Bearing" (M226).
OK or NG
OK
>> GO TO 4.
NG
>> Repair as necessary.

4. CHECK BRAKE FLUID PRESSURE
Check brake fluid pressure distribution.
Refer to BRC-21, "Basic Inspection" .
Is brake fluid pressure distribution normal?
YES >> Inspection End.
NO
>> Perform Basic Inspection. Refer to BRC-21, "Basic Inspection" .

Revision: February 2006

BRC-35

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[ABS]

Unexpected Pedal Action

EFS005LF

1. CHECK WARNING LAMP ACTIVATION
Make sure warning lamp remains off while driving.
OK or NG
OK
>> GO TO 2.
NG
>> Carry out self-diagnosis. Refer to BRC-25, "SELF-DIAGNOSIS" .

2. CHECK BRAKE PEDAL STROKE
Check brake pedal stroke.
Is brake pedal stroke excessive?
YES >> Perform Basic Inspection. Refer to BRC-21, "Basic
Inspection" .
NO
>> GO TO 3.

SBR540A

3. CHECK CONNECTOR AND BRAKING PERFORMANCE
1.
2.

Disable ABS by disconnecting ABS actuator and electric unit (control unit) connector.
Drive vehicle and check brake operation.
NOTE:
● Stopping distance may be longer than vehicles without ABS when road condition is slippery.
● Driving the vehicle with the ABS actuator and electric unit (control unit) disconnected may induce DTCs
in electrical control units using CAN communication. After the inspection, clear all DTCs. Refer to LAN21, "CAN COMMUNICATION" .
OK or NG
OK
>> GO TO 4.
NG
>> Perform Basic Inspection. Refer to BRC-21, "Basic Inspection" .

4. CHECK WHEEL SENSORS
Check the following.
●
Wheel sensor mounting for looseness
●
Wheel sensors for physical damage
●
Wheel sensor connectors for terminal damage or loose connections
OK or NG
OK
>> Check ABS actuator and electric unit (control unit) connector terminals for deformation, disconnection, looseness or damage. Reconnect ABS actuator and electric unit (control unit) harness
connector. Then retest.
NG
>> Repair or replace as necessary.

Revision: February 2006

BRC-36

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[ABS]

Long Stopping Distance

EFS005LG

1. CHECK BASE BRAKING SYSTEM PERFORMANCE
1.
2.

Disable ABS by disconnecting ABS actuator and electric unit (control unit) connector.
Drive vehicle and check brake operation.
NOTE:
● Stopping distance may be longer than vehicles without ABS when road condition is slippery.
● Driving the vehicle with the ABS actuator and electric unit (control unit) disconnected may induce DTCs
in electrical control units using CAN communication. After the inspection, clear all DTCs. Refer to LAN21, "CAN COMMUNICATION" .
OK or NG
OK
>> Go to BRC-35, "ABS Works Frequently" .
NG
>> Perform Basic Inspection. Refer to BRC-21, "Basic Inspection" .

ABS Does Not Work

EFS005LH

BRC

CAUTION:
The ABS does not operate when the vehicle speed is 10 km/h (6 MPH) or less.

1. CHECK WARNING LAMP ACTIVATION
Turn ignition switch ON and check for warning lamp activation.
●
Warning lamp should activate for approximately 2 seconds after turning the ignition switch ON.
OK or NG
OK
>> Carry out self-diagnosis. Refer to BRC-25, "SELF-DIAGNOSIS" .
NG
>> Go to BRC-38, "ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On" .

Pedal Vibration or ABS Operation Noise

EFS005LI

NOTE:
During ABS activation, pedal vibration may be felt and a noise may be heard. This is normal and does not indicate a malfunction.

1. CHECK SYMPTOM
L

1. Apply brake.
2. Start engine.
Does the symptom occur only when engine is started?
YES >> Carry out self-diagnosis. Refer to BRC-25, "SELF-DIAGNOSIS" .
NO
>> GO TO 2.

2. RECHECK SYMPTOM
Does the symptom occur only when electrical equipment switches (such as headlamps) are turned on?
YES
NO

>> Check for radio, antenna or related wiring that is routed too close to the ABS actuator and electric
unit (control unit) and reroute as necessary.
>> Go to BRC-35, "ABS Works Frequently" .

Revision: February 2006

BRC-37

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[ABS]

ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On

EFS005LJ

1. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) FUSES
Check 30A fusible link n and 40A fusible link l for ABS actuator and electric unit (control unit). For fusible link
layout, refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK
>> GO TO 2.
NG
>> If fusible link is blown, be sure to eliminate cause of problem before replacing.

2. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY CIRCUITS
1.

Disconnect ABS actuator and electric unit (control unit) connector.
2. Check voltage between ABS actuator and electric unit (control
unit) connector terminal 1 and ground and terminal 32 and
ground.
Does battery voltage exist?
YES >> GO TO 3.
NO
>> Repair harness or connectors between fusible link and
ABS actuator and electric unit (control unit).
WFIA0199E

3. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check continuity between ABS actuator and electric unit (control
unit) connector terminal 16 and ground and terminal 47 and ground.
Does continuity exist?
YES >> Replace ABS actuator and electric unit (control unit).
Refer to BRC-41, "Removal and Installation" .
NO
>> Repair harness or connectors between ABS actuator
and electric unit (control unit) and ground.

WFIA0196E

ABS Warning Lamp Stays On When Ignition Switch Is Turned On

EFS005LK

1. CARRY OUT SELF-DIAGNOSIS
Carry out self-diagnosis. Refer to BRC-25, "SELF-DIAGNOSIS" .
Are malfunctions detected in self-diagnosis?
YES >> Refer to BRC-26, "Display Item List" .
NO
>> Refer to DI-28, "WARNING LAMPS" .

Revision: February 2006

BRC-38

2005 Xterra

WHEEL SENSORS
[ABS]

WHEEL SENSORS
Removal and Installation

PFP:47910

A
EFS005LL

BRC

G
WFIA0339E

Front wheel sensor

Rear wheel sensor (C200)

Rear wheel sensor (M226)

REMOVAL
1.

Remove wheel sensor mounting screw(s).
● When removing the front wheel sensor, first remove the disc rotor to gain access to the front wheel sensor mounting bolt. Refer to BR-23, "Removal and Installation of Brake Caliper and Disc Rotor" .
Pull out the sensor, being careful to turn it as little as possible.
CAUTION:
● Be careful not to damage sensor edge and sensor rotor teeth.
● Do not pull on the sensor harness.
Disconnect wheel sensor harness electrical connector, then remove harness from mounts.

INSTALLATION
●

–
–

–

●

Before installing wheel sensors,
Inspect wheel sensor assembly and replace if damaged.
Clean wheel sensor hole and mounting surface with brake cleaner and a lint-free shop rag. Be careful that
dirt and debris do not enter the axle.
Install a new wheel sensor O-ring, then apply a coat of suitable grease to the O-ring and mounting hole.
Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS" .
Installation is in the reverse order of removal.

Revision: February 2006

BRC-39

2005 Xterra

SENSOR ROTOR
[ABS]

SENSOR ROTOR
Removal and Installation

PFP:47970
EFS005LM

FRONT
The wheel sensor rotors are built into the wheel hubs and are not removable. If damaged, replace wheel hub
and bearing assembly. Refer to FAX-5, "Removal and Installation" .

REAR (C200)
Removal and Installation
It is necessary to disassemble the rear axle to replace the sensor rotor. Perform the axle shaft assembly
removal procedure to replace sensor rotor. Refer to RAX-7, "Removal and Installation" .

REAR (M226)
Removal
1.

Remove axle shaft assembly. Refer to RAX-19, "Removal and Installation" .
NOTE:
It is necessary to disassemble the rear axle to replace the sensor rotor.
Pull the sensor rotor of off the axle shaft using Tool and a press.
Tool number

: 205-D002 (

—

)

Installation
1.

Install new sensor rotor on axle shaft using a suitable length
steel tube and a press. Make sure sensor rotor is fully seated.
CAUTION:
Do not reuse the old sensor rotor.
Install axle shaft assembly. Refer to RAX-7, "Removal and
Installation" (C200), or RAX-19, "Removal and Installation"
(M226).
CAUTION:
Do not reuse the axle oil seal. The axle oil seal must be
replaced every time the axle shaft assembly is removed
from the axle shaft housing.

Revision: February 2006

BRC-40

WFIA0341E

2005 Xterra

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
[ABS]

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Removal and Installation

PFP:47660

A
EFS005LN

BRC

WFIA0388E

To rear

To front left

To front right

From the master cylinder secondary
side

From the master cylinder primary
side

ABS actuator and electric unit (control unit)

Harness connector

Grommet

Collar

REMOVAL
1.
2.
3.

4.
5.

Disconnect the negative battery terminal.
Drain the brake fluid. Refer to BR-9, "Drain and Refill" .
Disconnect the actuator harness from the ABS actuator and electric unit (control unit).
CAUTION:
● To remove the brake tubes, use a flare nut wrench to prevent the flare nuts and brake tubes from
being damaged.
● Be careful not to splash brake fluid on painted areas.
Disconnect the brake tubes.
Remove three bolts and then the ABS actuator and electric unit (control unit).

Revision: February 2006

BRC-41

2005 Xterra

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
[ABS]
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
To install, use a flare nut wrench (commercial service tool).
●
Always tighten brake tubes to specification when installing. Refer to BR-11, "BRAKE PIPING AND
HOSE" .
●
Never reuse drained brake fluid.
●
After installation of the ABS actuator and electric unit (control unit), refill brake system with new
brake fluid. Then bleed the air from the system. Refer to BR-10, "Bleeding Brake System" .

Revision: February 2006

BRC-42

2005 Xterra

PRECAUTIONS
[ABLS/ABS]

PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”

EFS005U2

Precautions for Brake System

EFS005LP

Precautions When Using CONSULT-II

EFS005LQ

CHECK POINTS FOR USING CONSULT-II
1.

Has CONSULT-II been used without connecting CONSULT-II CONVERTER on this vehicle?
● If YES, GO TO 2.

Revision: February 2006

BRC-43

2005 Xterra

PRECAUTIONS
[ABLS/ABS]
If NO, GO TO 5.
Is there any indication other than indications relating to CAN communication system in the self-diagnosis
results?
● If YES, GO TO 3.
● If NO, GO TO 4.
Based on self-diagnosis results unrelated to CAN communication, carry out the inspection.
Malfunctions may be detected in self-diagnosis depending on control units carrying out CAN communication. Therefor, erase the self-diagnosis results.
Diagnose CAN communication system. Refer to LAN-21, "CAN COMMUNICATION" .
●

3.
4.
5.

Precautions for Brake Control
●
●
●
●
●

●
●
●

EFS005LR

Precautions for CAN System
●
●
●
●

EFS005LS

PKIA0306E

Revision: February 2006

BRC-44

2005 Xterra

PRECAUTIONS
[ABLS/ABS]
●

Do not make a bypass connection to repaired area. (If the circuit
is bypassed, characteristics of twisted wire will be lost.)

C
PKIA0307E

Wiring Diagrams and Trouble Diagnosis

D
EFS005LT

BRC

Revision: February 2006

BRC-45

2005 Xterra

PREPARATION
[ABLS/ABS]

PREPARATION
Special Service Tool

PFP:00002
EFS005LU

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name

Description

—
(J-45741)
ABS active wheel sensor tester

Checking operation of ABS active wheel
sensors

WFIA0101E

205-D002
(
—
)
Bearing splitter

Removing axle shaft bearing

ZZA0700D

Commercial Service Tools

EFS005LV

Tool name

Description

1. Flare nut crowfoot
2. Torque wrench

Removing and installing brake piping
a: 10mm (0.39 in)/12mm (0.47 in)

S-NT360

Revision: February 2006

BRC-46

2005 Xterra

SYSTEM DESCRIPTION
[ABLS/ABS]

SYSTEM DESCRIPTION
System Components

PFP:00000

A
EFS005LW

BRC

WFIA0362E

Revision: February 2006

BRC-47

2005 Xterra

SYSTEM DESCRIPTION
[ABLS/ABS]

ABS Function
●

●
●
●
●
●

EFS005LX

EBD Function
●

●
●
●
●

EFS005LY

ABLS Function
●

●
●

EFS005LZ

Active brake limited slip is a function to improve vehicle traction. Spinning of the drive wheels is detected
by the ABS actuator and electric unit (control unit) using inputs from the wheel speed sensors. If wheel
spin occurs, the ABLS system brakes the spinning wheel which distributes the driving power to the other
drive wheel.
The SLIP indicator lamp turns on to inform the driver of ABLS operation.
During ABLS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.

Fail-Safe Function

EFS005M0

CAUTION:
If the Fail-Safe function is activated, perform the Self Diagnosis for ABS/ABLS system.

ABS/EBD SYSTEM
In case of an electrical malfunction with the ABS, the ABS warning lamp will turn on. In case of an electrical
malfunction with the EBD system, the brake warning lamp and ABS warning lamp will turn on.
The system will revert to one of the following conditions of the Fail-Safe function.
1. For ABS malfunction, only the EBD is operative and the condition of the vehicle is the same condition of
vehicles without ABS/ABLS system.
2. For EBD malfunction, the EBD and ABS become inoperative, and the condition of the vehicle is the same
as the condition of vehicles without ABS/ABLS or EBD system.

ABLS SYSTEM
In case of an ABLS system malfunction, the SLIP indicator lamp will turn on. The condition of the vehicle is the
same as the condition of vehicles without ABS/ABLS system.

Revision: February 2006

BRC-48

2005 Xterra

SYSTEM DESCRIPTION
[ABLS/ABS]

Hydraulic Circuit Diagram

EFS005M1

BRC

J
WFIA0363E

Revision: February 2006

BRC-49

2005 Xterra

CAN COMMUNICATION
[ABLS/ABS]

CAN COMMUNICATION
System Description

PFP:23710
EFS005M2

Refer to LAN-21, "CAN COMMUNICATION" .

Revision: February 2006

BRC-50

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]

TROUBLE DIAGNOSIS
How to Perform Trouble Diagnoses for Quick and Accurate Repair

PFP:00000

A
EFS005M3

INTRODUCTION
The ABS/ABLS system has an electronic control unit to control major
functions. The control unit accepts input signals from sensors and
controls actuator operation. It is also important to check for conventional problems such as air leaks in the booster or lines, lack of
brake fluid, or other problems with the brake system.
It is much more difficult to diagnose a problem that occurs intermittently rather than continuously. Most intermittent problems are
caused by poor electrical connections or faulty wiring. In this case,
careful checking of suspicious circuits may help prevent the replacement of good parts.
A visual check only may not find the cause of the problem, so a road
test should be performed.
Before undertaking actual checks, take just a few minutes to talk with
a customer who approaches with an ABS/ABLS complaint. The customer is a very good source of information on such problems, especially intermittent ones. Through the talks with the customer, find out
what symptoms are present and under what conditions they occur.
Start your diagnosis by looking for “conventional” problems first. This
is one of the best ways to troubleshoot brake problems on an ABS/
ABLS equipped vehicle. Also check related Service Bulletins for
information.

SEF233G

BRC

H
SEF234G

Revision: February 2006

BRC-51

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]
WORK FLOW

WFIA0364E

Revision: February 2006

BRC-52

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]
CLARIFY CONCERN
●

●

SBR339B

EXAMPLE OF DIAGNOSIS SHEET
E

BRC

WFIA0365E

Revision: February 2006

BRC-53

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]

Component Parts and Harness Connector Location

EFS005M4

WFIA0366E

Revision: February 2006

BRC-54

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]

Schematic

EFS005M5

BRC

WFWA0234E

Revision: February 2006

BRC-55

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]

Wiring Diagram — ABLS —

EFS005M6

WFWA0235E

Revision: February 2006

BRC-56

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]
A

BRC

WFWA0236E

Revision: February 2006

BRC-57

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]

WFWA0237E

Revision: February 2006

BRC-58

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]
A

BRC

WFWA0238E

Revision: February 2006

BRC-59

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]

Basic Inspection

EFS005M7

BRAKE FLUID LEVEL, FLUID LEAK, AND BRAKE PAD INSPECTION
1.
2.

Check fluid level in the brake fluid reservoir. If fluid level is low, add fluid.
Check the brake piping and around the ABS actuator and electric unit (control unit) for leaks. If there is
leaking or seeping fluid, check the following items.
● If ABS actuator and electric unit (control unit) connection is loose, tighten the piping to the specified
torque and recheck for leaks.
● If there is damage to the connection flare nut or ABS actuator and electric unit (control unit) threads,
replace the damaged part and recheck for leaks.
● When there is fluid leaking or seeping from a fluid connection, use a clean cloth to wipe off the fluid and
recheck for leaks. If fluid is still seeping out, replace the damaged part. If the fluid is leaking at the ABS
actuator and electric unit (control unit), replace the ABS actuator and electric unit (control unit) assembly.
CAUTION:
The ABS actuator and electric unit (control unit) cannot be disassembled and must be replaced
as an assembly.
Check the brake pads for excessive wear.

ABS WARNING LAMP AND SLIP INDICATOR LAMP INSPECTION
1.

2.
3.

Make sure ABS warning lamp and SLIP indicator lamp turn on for approximately 2 seconds when the ignition switch is turned ON. If they do not, check CAN communications. If there are no errors with CAN communication system, check combination meter. Refer to DI-4, "COMBINATION METERS" .
Make sure the lamps turn off approximately 2 seconds after the ignition switch is turned ON. If the lamps
do not turn off, conduct self-diagnosis.
Make sure ABS warning lamp turns off approximately 2 seconds after the engine is started. If ABS warning lamp has not turned off 10 seconds after the engine has been started, conduct self-diagnosis of the
ABS actuator and electric unit (control unit).
After conducting the self-diagnosis, be sure to erase the error memory. Refer to BRC-64, "CONSULT-II
Function (ABS)" .

Revision: February 2006

BRC-60

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]

Warning Lamp and Indicator Timing

EFS005M8

A
ABS
warning lamp

SLIP
indicator lamp

Remarks

When the ignition switch is OFF

—

After the ignition switch is turned ON
for approx. 1 second

—

After the ignition switch is turned ON
for approx. 2 seconds

—

Lamp goes off approx. 2 seconds
after ignition switch is turned ON.

Condition

ABS/ABLS malfunction

When the ABS actuator and electric
unit (control unit) is malfunctioning
(power supply or ground malfunction).

ABLS malfunction

—

Only ABLS is malfunctioning (ABS
still functioning).

X: ON
—: OFF

BRC

Control Unit Input/Output Signal Standard

EFS005M9

N POSI SIG

P POSI SIG

Display content

PNP switch signal ON/
OFF condition

R POSI SIG

PNP switch signal ON/
OFF condition

SLCT LVR POSI

PNP switch signal ON/
OFF condition

GEAR

A/T gear position

FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSOR

Wheel speed

ACCEL POS SIG

Open/close condition
of throttle valve (linked
with accelerator pedal).

Revision: February 2006

Condition

Reference value in
normal operation

Note: Error inspection
checklist

A/T shift position = N position

A/T shift position = other than
N position

OFF

A/T shift position P position

A/T shift position = other than
P position

OFF

A/T shift position R position

A/T shift position = other than
R position

OFF

A/T shift position = N or P position

A/T shift position = other than
N or P positions

OFF

1st gear

2nd gear

3rd gear

4th gear

5th gear

Vehicle stopped

0 [km/h (MPH)]

Vehicle running (Note 1)

Almost in accordance with speedometer display
(within ±10%)

BRC-72, "Wheel Sensor
System Inspection"

Accelerator pedal not
depressed (ignition switch is
ON)

Depress accelerator pedal
(ignition switch is ON)

BRC-80, "CAN Communication System Inspection"

0 to 100%

BRC-61

J
BRC-80, "CAN Communication System Inspection"

—

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]
Data monitor
Monitor item

2WD/4WD

Display content

Drive axle

ENGINE SPEED

With engine running

BATTERY VOLT

Battery voltage supplied to ABS actuator
and electric unit (control unit)

CRANKING SIG

Cranking status

STOP LAMP SW

ABS WARN LAMP

MOTOR RELAY

ACTUATOR RLY

SLIP LAMP

EBD WARN LAMP

FR LH IN SOL
FR LH OUT SOL
FR RH IN SOL
FR RH OUT SOL
RR RH IN SOL
RR RH OUT SOL
RR LH IN SOL
RR LH OUT SOL

CV1
CV2
SV1
SV2

DECEL G-SEN

Stop lamp switch operation
ABS warning lamp ON
condition (Note 2)

Operation status of
motor and motor relay

Actuator relay operation status

SLIP indicator lamp
status (Note 3)

EBD warning lamp status

Solenoid valve operation

Switch-over valve status

Longitudinal acceleration detected by Decel
G-Sensor

Revision: February 2006

Condition

Reference value in
normal operation

2WD model

2WD

4WD model

4WD

With engine stopped

0 rpm

Engine running

Almost in accordance with
tachometer display

Ignition switch ON

10 to 16V

Cranking

Not cranking

OFF

Brake pedal depressed

Brake pedal not depressed

OFF

ABS warning lamp ON

ABS warning lamp OFF

OFF

Ignition switch ON or running
(ABS not activated)

OFF

Ignition switch ON or engine
running (ABS activated)

Vehicle stopped (Ignition
switch ON)

OFF

Vehicle stopped (Engine running)

When SLIP indicator lamp is
ON

When SLIP indicator lamp is
OFF

OFF

When EBD warning lamp is
ON

When EBD warning lamp is
OFF

OFF

Actuator (solenoid) is active
(“ACTIVE TEST” with CONSULT-II) or actuator relay is
inactive (in fail-safe mode).

When actuator (solenoid) is
not active and actuator relay is
active (ignition switch ON).

OFF

When actuator (switch-over
valve) is active (“ACTIVE
TEST” with CONSULT-II) or
actuator relay is inactive (when
in fail-safe mode).

When actuator (switch-over
valve) is not active and actuator relay is active (ignition
switch ON).

OFF

Vehicle stopped

Approx. 0 G

Vehicle running

-1.7 to 1.7 G

Note: Error inspection
checklist

—

BRC-73, "Engine System
Inspection"
BRC-77, "ABS/ABLS
Control Unit Power and
Ground Systems Inspection"
—
BRC-76, "Stop Lamp
Switch System Inspection"
—

BRC-75, "Actuator Motor,
Motor Relay, and Circuit
Inspection"

BRC-80, "CAN Communication System Inspection"

BRC-74, "Solenoid and
Change-Over Valve System Inspection"

—

BRC-62

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]
Data monitor
Monitor item

PRESS SENSOR

FLUID LEV SW

ABS SIGNAL
EBD SIGNAL
TCS SIGNAL

ABS FAIL SIG
EBD FAIL SIG
TCS FAIL SIG

Display content

Brake fluid pressure
detected by pressure
sensor

ON/OFF status of
brake fluid level switch

Signal status

Fail signal status

Condition
Do not step on the Brake pedal
(When ignition switch is ON)

Reference value in
normal operation
Approx. 0 bar

B
—

Step on the Brake pedal
(When ignition switch is ON)

-40 to 300 bar

When brake fluid level switch
ON

When brake fluid level switch
OFF

OFF

ABS active
EBD active
TCS active

ABS not active
EBD not active
TCS not active

OFF

ABS fail
EBD fail
TCS fail

ABS normal
EBD normal
TCS normal

Note: Error inspection
checklist

C
BRC-78, "Brake Fluid
Level Switch System
Inspection"

ABS system
EBD system
TCS system

BRC
ABS system
EBD system
TCS system

OFF

Revision: February 2006

BRC-63

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]

CONSULT-II Function (ABS)

EFS005MA

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
ABS diagnostic mode
WORK SUPPORT
SELF-DIAG RESULTS
DATA MONITOR

CAN DIAG SUPPORT MNTR

The result of transmit/receive diagnosis of CAN communication can be read.

ACTIVE TEST

Operation of electrical loads can be checked by sending drive signal to them.

FUNCTION TEST
ECU PART NUMBER

Conducted by CONSULT-II instead of a technician to determine whether each system is "OK" or
"NG".
ABS actuator and electric unit (control unit) part number can be read.

CONSULT-II BASIC OPERATION PROCEDURE
1.
2.

BBIA0538E

Touch “START (NISSAN BASED VHCL)”.

BCIA0029E

Touch “ABS” in the “SELECT SYSTEM” screen.
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link
Connector (DLC) Circuit" .

BCIA0030E

Revision: February 2006

BRC-64

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]
6.

Select the required diagnostic location from the “SELECT DIAG
MODE” screen.
For further information, see the CONSULT-II Operation Manual.

C
BCIA0031E

SELF-DIAGNOSIS
Description
If an error is detected in the system, the ABS warning lamp will turn on. In this case, perform self-diagnosis as
follows:

Operation Procedure
1.
2.

3.
4.
5.

Revision: February 2006

BRC-65

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]
Display Item List
Self-diagnostic item

Malfunction detecting condition

Check system

FR LH SENSOR 1
[C1104]

Circuit of front LH wheel sensor is open, shorted or sensor power
voltage is unusual.

RR RH SENSOR 1
[C1101]

Circuit of rear RH wheel sensor is open, shorted or sensor power
voltage is unusual.

FR RH SENSOR 1
[C1103]

Circuit of front RH wheel sensor is open, shorted or sensor power
voltage is unusual.

RR LH SENSOR 1
[C1102]

Circuit of rear LH wheel sensor is open, shorted or sensor power
voltage is unusual.

FR LH SENSOR 2
[C1108]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

RR RH SENSOR 2
[C1105]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

FR RH SENSOR 2
[C1107]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

RR LH SENSOR 2
[C1106]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

ABS SENSOR
[C1115]

Wheel sensor input is abnormal.

STOP LAMP SW
[C1116]

Stop lamp switch or circuit malfunction.

BRC-76, "Stop Lamp
Switch System Inspection"

DECEL G SEN SET
[C1160]

ABS decel sensor adjustment is incomplete.

BRC-74, "ABS/ABLS
Control Unit Inspection"

Revision: February 2006

BRC-66

BRC-72, "Wheel Sensor
System Inspection"
(Note 1)

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]
Self-diagnostic item

Malfunction detecting condition

FR LH IN ABS SOL
[C1120]

Circuit of front LH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

FR LH OUT ABS SOL
[C1121]

Circuit of front LH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

RR RH IN ABS SOL
[C1126]

Circuit of rear RH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

RR RH OUT ABS SOL
[C1127]

Circuit of rear RH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

FR RH IN ABS SOL
[C1122]

Circuit of front RH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

FR RH OUT ABS SOL
[C1123]

Circuit of front RH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

RR LH IN ABS SOL
[C1124]

Circuit of rear LH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

RR LH OUT ABS SOL
[C1125]

Circuit of rear LH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

CV1
[C1164]

Front side switch-over solenoid valve (cut valve) is open or
shorted, or control line is open or shorted to power supply or
ground.

CV2
[C1165]

Rear side switch-over solenoid valve (cut valve) is open or
shorted, or control line is open or shorted to power supply or
ground.

SV1
[C1166]

Front side switch-over solenoid valve (suction valve) is open or
shorted, or control line is open or shorted to power supply or
ground.

SV2
[C1167]

Rear side switch-over solenoid valve (suction valve) is open or
shorted, or control line is open or shorted to power supply or
ground.

PUMP MOTOR (Note 3)
[C1111]

Check system

BRC-74, "Solenoid and
Change-Over Valve System Inspection"

BRC

J
BRC-75, "Actuator
Motor, Motor Relay, and
Circuit Inspection"

BATTERY VOLTAGE
[ABNORMAL]
[C1109]

ABS actuator and electric unit (control unit) power voltage is too
low.

BRC-77, "ABS/ABLS
Control Unit Power and
Ground Systems Inspection"

G-SENSOR
[C1113]

Longitudinal G-sensor is malfunctioning, or signal line of longitudinal G-sensor is open or shorted.

BRC-74, "ABS/ABLS
Control Unit Inspection"

CONTROLLER FAILURE
[C1110]

Internal malfunction of ABS actuator and electric unit (control
unit)

BRC-74, "ABS/ABLS
Control Unit Inspection"

BR FLUID LEVEL LOW
[C1155]

Brake fluid level drops or circuit between ABS actuator and electric unit (control unit) and brake fluid level switch is open or
shorted.

BRC-78, "Brake Fluid
Level Switch System
Inspection"

ENGINE SIGNAL 1
[C1130]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ENGINE SIGNAL 2
[C1131]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ENGINE SIGNAL 6
[C1136]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ACTUATOR RLY
[C1140]

ABS actuator relay or circuit malfunction.

Revision: February 2006

BRC-67

BRC-73, "Engine System Inspection"

BRC-75, "Actuator
Motor, Motor Relay, and
Circuit Inspection"

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]
Self-diagnostic item

Malfunction detecting condition

Check system

PRESS SEN CIRCUIT
[C1142]

ABS pressure sense circuit malfunction.

BRC-78, "Pressure Sensor System Inspection"

VARIANT CODING
[C1170]

V coding is not malfunctioning.

BRC-74, "ABS/ABLS
Control Unit Inspection"

ABS DIFLOCK CONTROLLER
NG
[C1187]

Differential lock controller malfunction.

BRC-80, "CAN Communication System Inspection"

CAN COMM CIRCUIT
[U1000]

●

CAN communication line is open or shorted.

●

ABS actuator and electric unit (control unit) internal malfunction

●

Battery voltage for ECM is suddenly interrupted for approximately 0.5 second or more.

BRC-80, "CAN Communication System Inspection" (Note 2)

Note 1: If wheel sensor 2 for each wheel is indicated, check ABS actuator and electric unit (control unit) power supply voltage in addition
to wheel sensor circuit check.
Note 2: If multiple malfunctions are detected including CAN communication line [U1000], perform diagnosis for CAN communication line
first.

DATA MONITOR
Operation Procedure
1.

3.
4.

After turning OFF the ignition switch, connect CONSULT-II and the CONSULT-II CONVERTER to the data
link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
Touch “START (NISSAN BASED VHCL)”, “ABS”, “DATA MONITOR” in order on the CONSULT-II screen.
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link Connector (DLC) Circuit" .
CAUTION:
When “START (NISSAN BASED VHCL)” is touched immediately after starting the engine or turning
on the ignition switch, “ABS” might not be displayed in the SELECT SYSTEM screen. In this case,
repeat the operation from step 2.
Return to the SELECT MONITOR ITEM screen, and touch “ECU INPUT SIGNALS”, “MAIN SIGNALS”, or
“SELECTION FROM MENU”. Refer to the following information.
When “START” is touched, the data monitor screen is displayed.

Display Item List
Data monitor item selection
Item
(Unit)

Remarks

ECU INPUT
SIGNALS

MAIN
SIGNALS

SELECTION
FROM MENU

GEAR

Gear position judged by PNP
switch signal is displayed.

FR RH SENSOR
(km/h, MPH)

Wheel speed calculated by front
RH wheel sensor signal is displayed.

FR LH SENSOR
(km/h, MPH)

Wheel speed calculated by front LH
wheel sensor signal is displayed.

RR RH SENSOR
(km/h, MPH)

Wheel speed calculated by rear RH
wheel sensor signal is displayed.

RR LH SENSOR
(km/h, MPH)

Wheel speed calculated by rear LH
wheel sensor signal is displayed.

BATTERY VOLT
(V)

Voltage supplied to ABS actuator
and electric unit (control unit) is displayed.

N POSI SIG

–

Shift position judged by PNP switch
signal.

Revision: February 2006

BRC-68

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]
Item
(Unit)

Data monitor item selection
ECU INPUT
SIGNALS

MAIN
SIGNALS

SELECTION
FROM MENU

Remarks

P POSI SIG

–

Shift position judged by PNP switch
signal.

ACCEL POS SIG
(%)

–

Throttle valve open/close status
judged by CAN communication signal is displayed.

ENGINE SPEED
(rpm)

Engine speed judged by CAN communication signal is displayed.

STOP LAMP SW
(ON/OFF)

Stop lamp switch (ON/OFF) status
is displayed.

ABS WARN LAMP
(ON/OFF)

–

ABS warning lamp (ON/OFF) status
is displayed.

SLIP LAMP
(ON/OFF)

–

SLIP indicator lamp (ON/OFF) status is displayed.

FR LH IN SOL
(ON/OFF)

–

Front LH IN ABS solenoid (ON/
OFF) status is displayed.

FR LH OUT SOL
(ON/OFF)

–

Front LH OUT ABS solenoid (ON/
OFF) status is displayed.

RR RH IN SOL
(ON/OFF)

–

Rear RH IN ABS solenoid (ON/
OFF) status is displayed.

RR RH OUT SOL
(ON/OFF)

–

Rear RH OUT ABS solenoid (ON/
OFF) status is displayed.

FR RH IN SOL
(ON/OFF)

–

Front RH IN ABS solenoid (ON/
OFF) status is displayed.

FR RH OUT SOL
(ON/OFF)

–

Front RH OUT ABS solenoid (ON/
OFF) status is displayed.

RR LH IN SOL
(ON/OFF)

–

Rear LH IN ABS solenoid (ON/
OFF) status is displayed.

RR LH OUT SOL
(ON/OFF)

–

Rear LH OUT ABS solenoid (ON/
OFF) status is displayed.

MOTOR RELAY
(ON/OFF)

–

ABS motor relay signal (ON/OFF)
status is displayed.

ACTUATOR RLY
(ON/OFF)

–

ABS actuator relay signal (ON/
OFF) status is displayed.

CV1
(ON/OFF)

–

Front side switch-over solenoid
valve (cut valve) (ON/OFF) status is
displayed.

CV2
(ON/OFF)

–

Rear side switch-over solenoid
valve (cut-valve) (ON/OFF) status
is displayed.

SV1
(ON/OFF)

–

Front side switch-over solenoid
valve (suction valve) (ON/OFF) status is displayed.

SV2
(ON/OFF)

–

Rear side switch-over solenoid
valve (suction valve) (ON/OFF) status is displayed.

TCS FAIL SIG
(ON/OFF)

–

TCS fail signal (ON/OFF) status is
displayed.

ABS FAIL SIG
(ON/OFF)

–

ABS fail signal (ON/OFF) status is
displayed.

EBD FAIL SIG
(ON/OFF)

–

EBD fail signal (ON/OFF) status is
displayed.

Revision: February 2006

BRC-69

2005 Xterra

BRC

TROUBLE DIAGNOSIS
[ABLS/ABS]
Item
(Unit)

Data monitor item selection
Remarks

ECU INPUT
SIGNALS

MAIN
SIGNALS

SELECTION
FROM MENU

FLUID LEV SW
(ON/OFF)

–

Brake fluid level switch (ON/OFF)
status is displayed.

EBD SIGNAL
(ON/OFF)

–

EBD operation (ON/OFF) status is
displayed.

ABS SIGNAL
(ON/OFF)

–

ABS operation (ON/OFF) status is
displayed.

TCS SIGNAL
(ON/OFF)

–

TCS operation (ON/OFF) status is
displayed.

EBD WARN LAMP

–

Brake warning lamp (ON/OFF) status is displayed.

SLCT LVR POSI

Shift position judged by PNP switch
signal.

R POSI SIG

–

Shift position judged by PNP switch
signal.

2WD/4WD

–

It recognizes on software whether it
is 2WD and whether it is in 4WD
state.

PRESS SENSOR

–

Brake pressure detected by pressure sensor is displayed.

CRANKING SIG

–

The input state of the key SW
START position signal is displayed.

DECEL G-SEN

Longitudinal acceleration detected
by decel G-sensor is displayed.

×: Applicable
–: Not applicable

ACTIVE TEST
CAUTION:
●
Do not perform active test while driving.
●
Make sure to completely bleed air from the brake system.
●
The ABS and brake warning lamps turn on during the active test.

Operation Procedure
1.

2.
3.
4.
5.
6.

LBR379

Revision: February 2006

BRC-70

2005 Xterra

TROUBLE DIAGNOSIS
[ABLS/ABS]
7.
8.

With the “MAIN SIGNALS” display selected, touch “START”.
The Active Test screen will be displayed, so conduct the following test.

Solenoid Valve Operation Chart
ABS solenoid valve

ABS solenoid valve (ACT)

Operation
UP

KEEP

DOWN

ACTUATOR UP

ACTUATOR KEEP

FR RH SOL
FR RH ABS SOLENOID (ACT)

FR RH IN SOL

OFF

FR RH OUT SOL

OFF

ON*

OFF

FR LH SOL
FR LH ABS SOLENOID (ACT)

FR LH IN SOL

OFF

FR LH OUT SOL

OFF

ON*

OFF

RR RH SOL
RR RH ABS SOLENOID (ACT)

RR RH IN SOL

OFF

RR RH OUT SOL

OFF

ON*

OFF

RR LH SOL
RR LH ABS SOLENOID (ACT)

RR LH IN SOL

OFF

RR LH OUT SOL

OFF

ON*

OFF

RR RH IN SOL

OFF

RR RH OUT SOL

OFF

ON*

OFF

RR LH IN SOL

OFF

RR LH OUT SOL

OFF

ON*

OFF

REAR SOL

BRC

*: ON for 1 to 2 seconds after the touch, and then OFF

ABS Motor
Touch “ON” and “OFF” on the screen. Check that ABS motor relay
operates as shown in table below.
Operation

OFF

ABS actuator relay

ABS motor relay

OFF

NOTE:
●
If active test is performed with brake pedal depressed, pedal
stroke may change. This is normal.
●
“TEST IS STOPPED” is displayed approximately 10 seconds
after operation starts.

Revision: February 2006

BRC-71

M
SFIA0593E

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABLS/ABS]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Wheel Sensor System Inspection

PFP:00000
EFS005MB

INSPECTION PROCEDURE

2. CHECK WHEEL SENSOR OUTPUT SIGNAL
1.
2.

5. CHECK WIRING HARNESS FOR SHORT CIRCUIT
1.
2.

OK or NG
OK
>> GO TO 6.
NG
>> Repair the circuit.
WFIA0343E

Revision: February 2006

BRC-72

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABLS/ABS]

6. CHECK WIRING HARNESS FOR OPEN CIRCUIT

Check continuity between ABS actuator and electric unit (control unit) harness connector E125 and the malfunctioning wheel sensor harness connector E18, E117, C10, or C11.
ABS actuator and
electric unit (control unit)

Wheel sensor

Connector

Terminal

Connector

45
Front LH

33
E125

Rear LH

C11

2
2

42
Rear RH

Terminal

1
E117

37
36

Continuity
1

E18

34
Front RH

Wheel sensor

Yes

1
2

C10

BRC

Continuity should exist.
OK or NG
OK
>> Replace the ABS actuator and electric unit (control unit). Refer to BRC-87, "Removal and Installation" .
NG
>> Repair the circuit.

Engine System Inspection

EFS005MC

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK

Check self-diagnosis results.
J

Self-diagnosis results
ENGINE SIGNAL 1
ENGINE SIGNAL 2

ENGINE SIGNAL 6

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. ENGINE SYSTEM INSPECTION

1. Perform ECM self-diagnosis and repair as necessary.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis again.
OK or NG
OK
>> Inspection End.
NG
>> Repair or replace as necessary.

Revision: February 2006

BRC-73

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABLS/ABS]

ABS/ABLS Control Unit Inspection

EFS005MD

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Self-diagnosis results
CONTROLLER FAILURE
DECEL G SEN SET
G-SENSOR
VARIANT CODING

Is the above displayed in the self-diagnosis display items?
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-87, "Removal and Installation"
.
NO
>> Inspection End.

Solenoid and Change-Over Valve System Inspection

EFS005ME

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Self-diagnosis results
FR LH IN ABS SOL
FR LH OUT ABS SOL
RR RH IN ABS SOL
RR RH OUT ABS SOL
FR RH IN ABS SOL
FR RH OUT ABS SOL
RR LH IN ABS SOL
RR LH OUT ABS SOL
CV 1
CV 2
SV 1
SV 2

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

Revision: February 2006

BRC-74

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABLS/ABS]

3.
1.

CHECKING SOLENOID POWER AND GROUND

Check voltage between ABS actuator and electric unit (control
unit) harness connector E125 and body ground.
ABS actuator and electric
unit (control unit) harness
connector E125
32

Body
ground
—

Measured
value
(Approx.)
12V

D
WFIA0195E

Check resistance between ABS actuator and electric unit (control unit) harness connector E125 and body ground.
ABS actuator and electric
unit (control unit) harness
connector E125
16
47

Body
ground
—
—

Measured
value Ω
(Approx.)
0Ω
0Ω

OK or NG
OK
>> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-87, "Removal and Installation" .
NG
>> Repair the circuit.

Actuator Motor, Motor Relay, and Circuit Inspection

BRC

WFIA0196E

I
EFS005MF

INSPECTION PROCEDURE

1. CHECKING SELF-DIAGNOSIS RESULTS

Check self-diagnosis results.
K

Self-diagnosis results
PUMP MOTOR

ACTUATOR RLY

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

Revision: February 2006

BRC-75

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABLS/ABS]

3.
1.

CHECKING ABS MOTOR AND MOTOR RELAY POWER SYSTEM
Check voltage between ABS actuator and electric unit (control
unit) harness connector E125 and body ground.
ABS actuator and electric
unit (control unit) harness
connector E125
1

Measured
value
(Approx.)
12V

Body
ground
—

WFIA0209E

Check resistance between ABS actuator and electric unit (control unit) connector E125 and body ground.
ABS actuator and electric
unit (control unit)
harness connector E125
16
47

Measured
value Ω
(Approx.)
0Ω
0Ω

Body
ground
—
—

OK or NG
OK
>> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-87, "Removal and Installation" .
NG
>> Repair the circuit.

Stop Lamp Switch System Inspection

WFIA0196E

EFS005MG

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Self-diagnosis results
STOP LAMP SW

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION
1.

Disconnect the ABS actuator and electric unit (control unit) connector E125 and stop lamp switch connector E38.
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace as necessary.

Revision: February 2006

BRC-76

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABLS/ABS]

3. STOP LAMP SWITCH INSPECTION

Check the voltage between the ABS actuator and electric unit (control unit) harness connector E125 terminal 41 and body ground.
B

Brake pedal depressed

: Battery voltage
(approx. 12V)
Brake pedal not depressed : Approx. 0V

OK or NG
OK
>> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-87, "Removal and Installation" .
NG
>> Refer to LT-81, "STOP LAMP" .

D
WFIA0198E

ABS/ABLS Control Unit Power and Ground Systems Inspection

EFS005MH

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK

BRC

Check self-diagnosis results.
Self-diagnosis results

BATTERY VOLTAGE

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION

1. Disconnect the ABS actuator and electric unit (control unit) connector E125.
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace as necessary.

3. ABS/ABLS CONTROL UNIT POWER AND GROUND CIRCUIT INSPECTION
Measure the voltage and continuity between the ABS actuator and electric unit (control unit) harness connector E125 and body ground.
Signal name

ABS actuator and electric unit
(control unit)
harness connector E125

Power supply
Ground

1
32
16
47

Body
ground

Measured value

—

Battery voltage (Approx. 12V)

—

Continuity should exist.

OK or NG
OK
>> Check the battery for loose terminals, low voltage, etc. Repair as necessary.
NG
>> Repair the circuit.

Revision: February 2006

BRC-77

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABLS/ABS]

Brake Fluid Level Switch System Inspection

EFS005MI

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
1.
2.

Check the brake reservoir tank fluid level. If the level is low, add brake fluid.
Erase the self-diagnosis results and check the self-diagnosis results.
Self-diagnosis results
BR FLUID LEVEL LOW

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION
1.

Disconnect the ABS actuator and electric unit (control unit) connector E125 and brake fluid level switch
connector E21.
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace as necessary.

3. CHECK THE HARNESS BETWEEN THE BRAKE FLUID LEVEL SWITCH AND THE ABS ACTUATOR
AND ELECTRIC UNIT (CONTROL UNIT)
Check the continuity between the brake fluid level switch harness connector E21 and the ABS actuator and
electric unit (control unit) harness connector E125.
ABS actuator and electric unit
(control unit) harness connector
E125

Brake fluid level switch harness
connector E21

Continuity

Yes

Ground

Yes

OK or NG
OK
>> Perform self-diagnosis again. If the same results appear, replace ABS actuator and electric unit
(control unit). Refer to BRC-87, "Removal and Installation" .
NG
>> Repair the circuit.

Pressure Sensor System Inspection

EFS005MJ

INSPECTION PROCEDURE

1. DISPLAY SELF DIAGNOSIS RESULTS
Check self-diagnosis results.
Self-diagnosis results
PRESS SEN CIRCUIT

Is the above displayed in the self-diagnosis display items?
YES or NO
YES >> GO TO 2.
NO
>> Inspection End.

Revision: February 2006

BRC-78

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABLS/ABS]

2. CONNECTOR INSPECTION

1.
2.

Turn the ignition switch OFF.
Disconnect the front pressure sensor connector E31 and ABS actuator and electric unit (control unit) connector E125 and inspect the terminals for deformation, disconnection, looseness, or damage.
OK or NG
OK
>> GO TO 3.
NG
>> Repair connector.

3. FRONT PRESSURE SENSOR CIRCUIT INSPECTION
1.

Measure the continuity between the ABS actuator and electric unit (control unit) harness connector E125
and front pressure sensor harness connector E31.
ABS actuator and electric unit
(control unit) harness connector
E125

Front pressure sensor harness connector E31

Continuity
BRC

Yes
G

Measure the continuity between the ABS actuator and electric unit (control unit) harness connector E125
and body ground.
H

ABS actuator and electric unit
(control unit) harness connector
E125

Body ground

Continuity
I

18
19

—

No
J

20
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness or connector.

4. FRONT PRESSURE SENSOR INSPECTION
1.
2.

Reconnect the front pressure sensor and ABS actuator and electric unit (control unit) connectors.
Use "DATA MONITOR" to check if the status of "PRESS SENSOR" is normal.
Condition
When brake pedal is depressed
When brake pedal is released

Data monitor display (Approx.)
PRESS SENSOR
Positive value
0 bar

OK or NG
OK
>> Inspection End.
NG
>> Replace front pressure sensor.

Revision: February 2006

BRC-79

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[ABLS/ABS]

CAN Communication System Inspection

EFS005MK

INSPECTION PROCEDURE

1. CHECK CONNECTOR
1.

Revision: February 2006

BRC-80

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[ABLS/ABS]

TROUBLE DIAGNOSES FOR SYMPTOMS
ABS Works Frequently

PFP:99999

A
EFS005ML

1. CHECK WARNING LAMP ACTIVATION

Make sure warning lamp remains off while driving.
OK or NG
OK
>> GO TO 2.
NG
>> Carry out self-diagnosis. Refer to BRC-65, "SELF-DIAGNOSIS" .

BRC

3. CHECK FRONT AND REAR AXLES

4. CHECK BRAKE FLUID PRESSURE
Check brake fluid pressure distribution.
Refer to BRC-60, "Basic Inspection" .
Is brake fluid pressure distribution normal?
YES >> Inspection End.
NO
>> Perform Basic Inspection. Refer to BRC-60, "Basic Inspection" .

Revision: February 2006

BRC-81

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[ABLS/ABS]

Unexpected Pedal Action

EFS005MM

1. CHECK WARNING LAMP ACTIVATION
Make sure warning lamp remains off while driving.
OK or NG
OK
>> GO TO 2.
NG
>> Carry out self-diagnosis. Refer to BRC-65, "SELF-DIAGNOSIS" .

2. CHECK BRAKE PEDAL STROKE
Check brake pedal stroke.
Is pedal stroke excessive?
YES >> Perform Basic Inspection. Refer to BRC-60, "Basic
Inspection" .
NO
>> GO TO 3.

SBR540A

3. CHECK CONNECTOR AND BRAKING PERFORMANCE
1.
2.

Revision: February 2006

BRC-82

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[ABLS/ABS]

Long Stopping Distance

EFS005MN

1. CHECK BASE BRAKING SYSTEM PERFORMANCE
1.
2.

Disable ABS by disconnecting ABS actuator and electric unit (control unit) connector.
Drive vehicle and check brake operation.
NOTE:
● Stopping distance may be longer than vehicles without ABS when road condition is slippery.
● Driving the vehicle with the ABS actuator and electric unit (control unit) disconnected may induce DTCs
in electrical control units using CAN communication. After the inspection, clear all DTCs. Refer to LAN21, "CAN COMMUNICATION" .
OK or NG
OK
>> Go to BRC-81, "ABS Works Frequently" .
NG
>> Perform Basic Inspection. Refer to BRC-60, "Basic Inspection" .

ABS Does Not Work

EFS005MO

BRC

CAUTION:
The ABS does not operate when the vehicle speed is 10 km/h (6 MPH) or less.

1. CHECK WARNING LAMP ACTIVATION
Turn ignition switch ON and check for warning lamp activation.
●
Warning lamp should activate for approximately 2 seconds after turning the ignition switch ON.
OK or NG
OK
>> Carry out self-diagnosis. Refer to BRC-65, "SELF-DIAGNOSIS" .
NG
>> Go to BRC-84, "ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On" .

Pedal Vibration or ABS Operation Noise

EFS005MP

NOTE:
During ABS activation, pedal vibration may be felt and a noise may be heard. This is normal and does not indicate a malfunction.

1. CHECK SYMPTOM
L

1. Apply brake.
2. Start engine.
Does the symptom occur only when engine is started?
YES >> Carry out self-diagnosis. Refer to BRC-65, "SELF-DIAGNOSIS" .
NO
>> GO TO 2.

2. RECHECK SYMPTOM
Does the symptom occur only when electrical equipment switches (such as headlamps) are turned on?
YES
NO

>> Check for radio, antenna or related wiring that is routed too close to the ABS actuator and electric
unit (control unit) and reroute as necessary.
>> Go to BRC-81, "ABS Works Frequently" .

Revision: February 2006

BRC-83

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[ABLS/ABS]

ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On

EFS005MQ

2. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY CIRCUITS
1.

3. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check continuity between ABS actuator and electric unit (control
unit) connector terminal 16 and ground and terminal 47 and ground.
Does continuity exist?
YES >> Replace ABS actuator and electric unit (control unit).
Refer to BRC-87, "Removal and Installation" .
NO
>> Repair harness or connectors between ABS actuator
and electric unit (control unit) and ground.

WFIA0196E

ABS Warning Lamp Stays On When Ignition Switch Is Turned On

EFS005MR

1. CARRY OUT SELF-DIAGNOSIS
Carry out self-diagnosis. Refer to BRC-65, "SELF-DIAGNOSIS" .
Are malfunctions detected in self-diagnosis?
YES >> Refer to BRC-66, "Display Item List" .
NO
>> Refer to DI-28, "WARNING LAMPS" .

Revision: February 2006

BRC-84

2005 Xterra

WHEEL SENSORS
[ABLS/ABS]

WHEEL SENSORS
Removal and Installation

PFP:47910

A
EFS005MS

BRC

G
WFIA0339E

Front wheel sensor

Rear wheel sensor (C200)

Rear wheel sensor (M226)

REMOVAL
1.

INSTALLATION
●

–
–

–

●

Revision: February 2006

BRC-85

2005 Xterra

SENSOR ROTOR
[ABLS/ABS]

SENSOR ROTOR
Removal and Installation

PFP:47970
EFS005MT

FRONT
The wheel sensor rotors are built into the wheel hubs and are not removable. If damaged, replace wheel hub
and bearing assembly. Refer to FAX-5, "Removal and Installation" .

REAR (M226)
Removal
1.

: 205-D002 (

—

)

Installation
1.

Revision: February 2006

BRC-86

WFIA0341E

2005 Xterra

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
[ABLS/ABS]

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Removal and Installation

PFP:47660

A
EFS005MU

BRC

WFIA0389E

To rear left

To rear right

To front right

From the master cylinder secondary 6.
side

From the master cylinder primary
side

ABS actuator and electric unit (control unit)

Harness connector

Grommet

To front left

10. Collar

REMOVAL
1.
2.
3.

4.
5.

Revision: February 2006

BRC-87

2005 Xterra

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
[ABLS/ABS]
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
To install, use a flare nut wrench (commercial service tool).
●
Always tighten brake tubes to specification when installing. Refer to BR-11, "BRAKE PIPING AND
HOSE" .
●
Never reuse drained brake fluid.
●
After installation of the ABS actuator and electric unit (control unit), refill brake system with new
brake fluid. Then bleed the air from the system. Refer to BR-10, "Bleeding Brake System" .

Revision: February 2006

BRC-88

2005 Xterra

PRECAUTIONS
[VDC/TCS/ABS]

PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”

EFS005U3

Precautions for Brake System

EFS005HC

Precautions When Using CONSULT-II

EFS005HD

CHECK POINTS FOR USING CONSULT-II
1.

Has CONSULT-II been used without connecting CONSULT-II CONVERTER on this vehicle?
● If YES, GO TO 2.

Revision: February 2006

BRC-89

2005 Xterra

PRECAUTIONS
[VDC/TCS/ABS]
If NO, GO TO 5.
Is there any indication other than indications relating to CAN communication system in the self-diagnosis
results?
● If YES, GO TO 3.
● If NO, GO TO 4.
Based on self-diagnosis results unrelated to CAN communication, carry out the inspection.
Malfunctions may be detected in self-diagnosis depending on control units carrying out CAN communication. Therefor, erase the self-diagnosis results.
Diagnose CAN communication system. Refer to LAN-21, "CAN COMMUNICATION" .
●

3.
4.
5.

Precautions for Brake Control
●
●
●
●

●
●
●
●

●

●
●

●

●
●

●

EFS005HE

During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.
Just after starting vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check.
Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
When an error is indicated by ABS or another warning lamp, collect all necessary information from customer (what symptoms are present under what conditions) and check for simple causes before starting
diagnosis. Besides electrical system inspection, check brake booster operation, brake fluid level, and fluid
leaks.
If incorrect tire sizes or types are installed on the vehicle or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.
If there is a radio, antenna or related wiring near control module, ABS function may have a malfunction or
error.
If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits or improper wiring.
If the following components are replaced with non-genuine components or modified, the VDC OFF indicator lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Components
related to suspension (shock absorbers, struts, springs, bushings, etc.), tires, wheels (exclude specified
size), components related to brake system (pads, rotors, calipers, etc.), components related to engine
(muffler, ECM, etc.), components related to body reinforcement (roll bar, tower bar, etc.).
Driving with broken or excessively worn suspension components, tires or brake system components may
cause the VDC OFF indicator lamp and the SLIP indicator lamp to turn on, and the VDC system may not
operate properly.
When the TCS or VDC is activated by sudden acceleration or sudden turn, some noise may occur. The
noise is a result of the normal operation of the TCS and VDC.
When driving on roads which have extreme slopes (such as mountainous roads) or high banks (such as
sharp curves on a freeway), the VDC may not operate normally, or the VDC warning lamp and the SLIP
indicator lamp may turn on. This is not a problem if normal operation can be resumed after restarting the
engine.
Sudden turns (such as spin turns, acceleration turns), drifting, etc. with VDC turned off may cause the yaw
rate/side G sensor to indicate a problem. This is not a problem if normal operation can be resumed after
restarting the engine.
If battery is removed or steering angle sensor is disconnected, power to steering angle sensor is lost and
the screen goes into steering angle sensor safe mode.
When screen goes into steering angle sensor safe mode, perform "Adjustment of Steering Angle Sensor
Neutral Position" with CONSULT-II and check that VDC OFF indicator turns off. Additionally, perform selfdiagnosis, check that only "Steering Angle Sensor Safe Mode" is shown for self-diagnostic result, and
then delete the memory. (If the self-diagnostic result shows an indication other than "Steering Angle Sensor Safe Mode", repair the relevant part and restart self-diagnosis.) The steering angle sensor is released
and returns to normal condition by performing the above operation.
When checking, if only "Steering Angle Sensor Safe Mode" is shown in the self-diagnostic result and VDC
OFF indicator is off, delete history of malfunction. This happens when battery power supply is lost and the
screen goes into Steering Angle Sensor Safe Mode, and then screen returns to normal mode automati-

Revision: February 2006

BRC-90

2005 Xterra

PRECAUTIONS
[VDC/TCS/ABS]
cally by driving the vehicle in a straight forward direction [for approximately 30 seconds at 20 km/h (12
MPH) or more] after power is supplied again.
NOTE:
VDC OFF indicator lamp is on when VDC OFF switch is on.

Precautions for CAN System
●
●
●
●

EFS005HF

BRC
PKIA0306E

G
●

Do not make a bypass connection to repaired area. (If the circuit
is bypassed, characteristics of twisted wire will be lost.)
H

J
PKIA0307E

Wiring Diagrams and Trouble Diagnosis

EFS005HG

Revision: February 2006

BRC-91

2005 Xterra

PREPARATION
[VDC/TCS/ABS]

PREPARATION
Special Service Tool

PFP:00002
EFS005HH

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name

Description

—
(J-45741)
ABS active wheel sensor tester

Checking operation of ABS active wheel
sensors

WFIA0101E

205-D002
(
—
)
Bearing replacer

Removing sensor rotor

ZZA0700D

Commercial Service Tools

EFS005HI

Tool name

Description

1. Flare nut crowfoot
2. Torque wrench

Removing and installing brake piping
a: 10 mm (0.39 in)/12 mm (0.47 in)

S-NT360

Revision: February 2006

BRC-92

2005 Xterra

SYSTEM DESCRIPTION
[VDC/TCS/ABS]

SYSTEM DESCRIPTION
System Components

PFP:00000

A
EFS005HJ

BRC

WFIA0356E

Revision: February 2006

BRC-93

2005 Xterra

SYSTEM DESCRIPTION
[VDC/TCS/ABS]

ABS Function
●

●
●
●
●
●

EFS005HK

EBD Function
●

●
●
●
●

EFS005HL

TCS Function
●

●
●
●

EFS005HM

Spinning of the drive wheels is detected by the ABS actuator and electric unit (control unit) using inputs
from the wheel speed sensors. If wheel spin occurs, the drive wheel right and left brake fluid pressure
control and engine fuel cut are activated while the throttle value is restricted to reduce the engine torque
and decrease the amount of wheel spin. In addition, the throttle opening is controlled to achieve the optimum engine torque.
Depending on road condition, the vehicle may have a sluggish feel. This is normal, because optimum traction has the highest priority during TCS operation.
TCS may be activated during sudden vehicle acceleration, wide open throttle acceleration, sudden transmission shifts or when the vehicle is driven on a road with a varying surface friction coefficient.
The SLIP indicator lamp flashes to inform the driver of TCS operation.

VDC Function
●

●
●
●

EFS005HN

In addition to the ABS/TCS function, the driver steering amount and brake operation amount are detected
from the steering angle sensor and pressure sensors, and the vehicle's driving status (amount of under
steering/over steering) is determined using inputs from the yaw rate sensor/side G sensor, wheel speed
sensors, etc. and this information is used to improve vehicle stability by controlling the braking and engine
torque application to the wheels.
The SLIP indicator lamp flashes to inform the driver of VDC operation.
During VDC operation, the vehicle body and brake pedal may vibrate lightly and a mechanical noise may
be heard. This is normal.
The VDC OFF indicator lamp and SLIP indicator lamp may turn on when the vehicle is subject to strong
shaking or large vibration, such as when the vehicle is on a turntable or a ship while the engine is running
or on a steep slope. In this case, restart the engine on a normal road and if the VDC OFF indicator lamp
and SLIP indicator lamp turn off, there is no problem.

Fail-Safe Function

EFS005HO

CAUTION:
If the Fail-Safe function is activated, perform the Self Diagnosis for ABS/TCS/VDC system.
Revision: February 2006

BRC-94

2005 Xterra

SYSTEM DESCRIPTION
[VDC/TCS/ABS]
ABS/EBD SYSTEM
In case of an electrical malfunction with the ABS, the ABS warning lamp, VDC OFF indicator lamp and SLIP
indicator lamp will turn on. In case of an electrical malfunction with the EBD system, the BRAKE warning lamp,
ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp will turn on.
The system will revert to one of the following conditions of the Fail-Safe function.
1. For ABS malfunction, only the EBD is operative and the condition of the vehicle is the same condition of
vehicles without ABS/TCS/VDC system.
2. For EBD malfunction, the EBD and ABS become inoperative, and the condition of the vehicle is the same
as the condition of vehicles without ABS/TCS/VDC or EBD system.

VDC/TCS SYSTEM
In case of TCS/VDC system malfunction, the VDC OFF indicator lamp and SLIP indicator lamp are turned on
and the condition of the vehicle is the same as the condition of vehicles without TCS/VDC system. In case of
an electrical malfunction with the TCS/VDC system, the ABS control continues to operate normally without
TCS/VDC control.

Hydraulic Circuit Diagram

EFS005HP

BRC

WFIA0357E

Revision: February 2006

BRC-95

2005 Xterra

CAN COMMUNICATION
[VDC/TCS/ABS]

CAN COMMUNICATION
System Description

PFP:23710
EFS005HQ

Refer to LAN-21, "CAN COMMUNICATION" .

Revision: February 2006

BRC-96

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]

TROUBLE DIAGNOSIS
How to Perform Trouble Diagnoses for Quick and Accurate Repair

PFP:00000

A
EFS005HR

INTRODUCTION
The ABS/TCS/VDC system has an electronic control unit to control
major functions. The control unit accepts input signals from sensors
and controls actuator operation. It is also important to check for conventional problems such as air leaks in the booster or lines, lack of
brake fluid, or other problems with the brake system.
It is much more difficult to diagnose a problem that occurs intermittently rather than continuously. Most intermittent problems are
caused by poor electrical connections or faulty wiring. In this case,
careful checking of suspicious circuits may help prevent the replacement of good parts.
A visual check only may not find the cause of the problem, so a road
test should be performed.
Before undertaking actual checks, take just a few minutes to talk with
a customer who approaches with a ABS/TCS/VDC complaint. The
customer is a very good source of information on such problems,
especially intermittent ones. Through the talks with the customer,
find out what symptoms are present and under what conditions they
occur.
Start your diagnosis by looking for “conventional” problems first. This
is one of the best ways to troubleshoot brake problems on a ABS/
TCS/VDC equipped vehicle. Also check related Service Bulletins for
information.

SEF233G

BRC

H
SEF234G

Revision: February 2006

BRC-97

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
WORK FLOW

WFIA0358E

Revision: February 2006

BRC-98

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
CLARIFY CONCERN
●

●

SBR339B

EXAMPLE OF DIAGNOSIS SHEET
E

BRC

WFIA0097E

Revision: February 2006

BRC-99

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]

Component Parts and Harness Connector Location

EFS005HS

WFIA0401E

Revision: February 2006

BRC-100

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]

Schematic

EFS005HT

BRC

WFWA0239E

Revision: February 2006

BRC-101

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]

Wiring Diagram — VDC —

EFS005HU

WFWA0240E

Revision: February 2006

BRC-102

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
A

BRC

WFWA0241E

Revision: February 2006

BRC-103

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]

WFWA0242E

Revision: February 2006

BRC-104

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
A

BRC

WFWA0243E

Revision: February 2006

BRC-105

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]

WFWA0244E

Revision: February 2006

BRC-106

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
A

BRC

WFWA0245E

Revision: February 2006

BRC-107

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]

WFWA0246E

Revision: February 2006

BRC-108

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]

Basic Inspection

EFS005HV

BRAKE FLUID LEVEL, FLUID LEAK, AND BRAKE PAD INSPECTION
1.
2.

ABS WARNING LAMP, SLIP INDICATOR LAMP AND VDC OFF INDICATOR LAMP INSPECTION
1.

Make sure ABS warning lamp, SLIP indicator lamp and VDC OFF indicator lamp (when VDC OFF switch
is off), turn on for approximately 2 seconds when the ignition switch is turned ON. If they do not, check the
ABS warning lamp, SLIP indicator lamp and VDC OFF indicator lamp. Check CAN communications. If
there are no errors with the CAN communication system, check combination meter. Refer to DI-4, "COMBINATION METERS" .
Make sure the lamps turn off approximately 2 seconds after the ignition switch is turned ON. If the lamp
does not turn off, conduct self-diagnosis.
NOTE:
● On 4WD vehicles, when the transfer case is placed in 4LO, the VDC system is disabled and the VDC
OFF indicator will turn on.
● If the battery has been disconnected, the TCS/VDC system is initialized and the SLIP and VDC OFF
indicator lamps may not turn off after 2 seconds when the ignition switch is turned ON. In this case,
refer to BRC-115, "SELF-DIAGNOSIS" .
With the engine running, make sure the VDC OFF indicator lamp turns on and off when the VDC OFF
switch is turned on and off. If the indicator lamp status does not correspond to switch operation, check the
VDC OFF switch. Refer to BRC-136, "VDC OFF SWITCH" .
Make sure ABS warning lamp, SLIP indicator lamp and VDC OFF indicator lamp turn off approximately 2
seconds after the ignition switch is turned ON. If ABS warning lamp, SLIP indicator lamp and VDC OFF
indicator lamp have not turned off 2 seconds after the ignition switch is turned ON, conduct self-diagnosis
of the ABS actuator and electric unit (control unit).
After conducting the self-diagnosis, be sure to erase the error memory. Refer to BRC-114, "CONSULT-II
Function (ABS)" .

Revision: February 2006

BRC-109

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]

For Fast and Accurate Diagnosis

EFS005HW

PRECAUTIONS FOR DIAGNOSIS
●
●

●
●

●
●
●
●
●
●

Before performing diagnosis, always read precautions. Refer to BRC-89, "PRECAUTIONS" .
If ABS actuator and electric unit (control unit), steering angle sensor, steering system parts or suspension
system parts have been replaced, or if alignment has been adjusted, be sure to adjust neutral position of
steering angle sensor before driving. Refer to BRC-142, "Adjustment of Steering Angle Sensor Neutral
Position" .
After diagnosis is finished, be sure to erase memory. Refer to BRC-115, "SELF-DIAGNOSIS" .
When checking continuity and voltage between units, be sure to check for disconnection, looseness,
bend, or collapse of connector terminals. If any non-standard condition is found, repair or replace connector terminals.
For intermittent symptoms, possible cause is malfunction in harness, harness connector, or terminals.
Move harness, harness connector, and terminals to check for poor connections.
If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.
To use CONSULT-II to perform self-diagnosis of ABS actuator and electric unit (control unit), active tests,
or work support, first stop work, then connect CONSULT-II and select “ABS”.
CONSULT-II self-diagnosis results are displayed without regard to occurrence timing. In some cases later
ones (timing value is small) appear on the next screen.
When self-diagnostic results of CONSULT-II show a malfunction, if CONSULT-II active test is performed,
an engine system error may be indicated. In this case, start engine to resume the normal screen.
VDC/TCS/ABS system electronically controls brake operation and engine output. The following symptoms
may be caused by normal operations:
Symptom

Symptom description

Result

This is noise of motor inside ABS actuator and electric unit (control unit).
Slight noise may occur during VDC, TCS, and ABS operation.
Motor operation noise

When the vehicle speed goes over 20 km/h (12.5 mph), the motor and
valves operating noise may be heard. It happens only once after IGN
(ignition) is ON. This is a normal status of the system operation check.

System operation check
noise

When the engine starts, slight “click” noise may be heard from engine
compartment. This is normal and is part of system operation check.

Normal

TCS may activate momentarily if wheel speed changes when driving
over location where friction coefficient varies, when up/downshifting or
when fully depressing accelerator pedal.

VDC/TCS operation
(SLIP indicator lamp blinking)

For inspection of speedometer or other instruments, press
VDC OFF switch to turn VDC/TCS function off.
When accelerator pedal is depressed on a chassis dynamometer (fixed
front-wheel type), vehicle speed will not increase. This is not normal. It is
result of TCS being activated by stationary front wheels. Warning lamp
may also illuminate to indicate “sensor system error”. This is also normal, and is the result of the stationary front wheels being detected. To be
certain, restart engine, and drive vehicle at 30 km/h (19 MPH) or more.
Make sure warning lamp does not illuminate.

Normal
Cancel the VDC/TCS
function for the
inspection on a chassis dynamometer.

ABS operation (Longer stopping distance)

On roads with low friction coefficients, such as snowy roads or gravel
roads, vehicles with ABS may require a longer stopping distance. Therefore, when driving on such roads, avoid overconfidence and keep speed
sufficiently low.

Normal

Insufficient feeling of acceleration

Depending on road conditions, driver may feel that feeling of acceleration is insufficient. This is because traction control, which controls the
engine and brakes to achieve optimal traction, has the highest priority
(for safety). As a result, there may be times when acceleration is slightly
less than usual for the same accelerator pedal operation.

Normal

Revision: February 2006

BRC-110

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]

Warning Lamp and Indicator Timing

EFS005HX

A
ABS
warning
lamp

VDC OFF
indicator
lamp

SLIP
indicator
lamp

Remarks

When the ignition switch is OFF

—

After the ignition switch is turned ON for approx. 2
seconds

—

After the ignition switch has been turned ON for
approx. 2 seconds

—

When the VDC OFF switch is pressed (VDC function OFF)

—

ABS/TCS/VDC malfunction

—

When the VDC is malfunctioning

—

Condition

X: ON
—: OFF

Control Unit Input/Output Signal Standard

EFS005HY

BRC

Display content
Condition

N POSI SIG

P POSI SIG

GEAR

PNP switch signal ON/
OFF condition

A/T gear position

FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSOR

Wheel speed

ACCEL POS SIG

Open/close condition
of throttle valve (linked
with accelerator pedal).

2WD/4WD

ENGINE SPEED

Drive axle

With engine running

Revision: February 2006

Reference value in
normal operation

Note: Error inspection
checklist

BRC-135, "CAN Communication System Inspection"

A/T shift position = N position

A/T shift position = other than
N positions

OFF

A/T shift position P position

A/T shift position = other than
P positions

OFF

1st gear

2nd gear

3rd gear

4th gear

5th gear

Vehicle stopped

0 [km/h (MPH)]

Vehicle running (Note 1)

Almost in accordance with speedometer display
(within ±10%)

BRC-123, "Wheel Sensor System Inspection"

Accelerator pedal not
depressed (ignition switch is
ON)

Depress accelerator pedal
(ignition switch is ON)

0 to 100%

BRC-135, "CAN Communication System Inspection"

2WD model

2WD

4WD model

4WD

With engine stopped

0 RPM

Engine running

Almost in accordance with
tachometer display

BRC-111

BRC-135, "CAN Communication System Inspection"

K
—

—

BRC-124, "Engine System Inspection"

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
Data monitor
Monitor item

STR ANGLE SIG

YAW RATE SEN

SIDE G SENSOR

BATTERY VOLT

OFF SW

ABS WARN LAMP

MOTOR RELAY

ACTUATOR RLY

OFF LAMP

SLIP LAMP

FR LH IN SOL
FR LH OUT SOL
FR RH IN SOL
FR RH OUT SOL
RR RH IN SOL
RR RH OUT SOL
RR LH IN SOL
RR LH OUT SOL

CV1
CV2
SV1
SV2

Display content
Steering angle
detected by steering
angle sensor
Yaw rate detected by
yaw rate sensor
Transverse G detected
by side G-sensor
Battery voltage supplied to ABS actuator
and electric unit (control unit)

VDC OFF switch
ON/OFF status

ABS warning lamp ON
condition (Note 2)

Operation status of
motor and motor relay

Actuator relay operation status

VDC OFF indicator
lamp status (Note 3)

SLIP indicator lamp
status (Note 4)

Solenoid valve operation

VDC switch-over valve
status

Revision: February 2006

Condition

Reference value in
normal operation

Straight-ahead

Approx. 0 deg

Steering wheel turned

–756 to 756 deg

Vehicle stopped

Approx. 0 d/s

Vehicle running

–100 to 100 d/s

Vehicle stopped

Approx. 0 m/s2

Vehicle running

–16.7 to 16.7 m/s2

Ignition switch ON

10 to 16V

VDC OFF switch ON
(When VDC OFF indicator
lamp is ON)

VDC OFF switch OFF
(When VDC OFF indicator
lamp is OFF)

OFF

ABS warning lamp ON

ABS warning lamp OFF

OFF

Ignition switch ON or running
(ABS not activated)

OFF

Ignition switch ON or engine
running (ABS activated)

Vehicle stopped (Ignition
switch ON)

OFF

Vehicle stopped (Engine running)

When VDC OFF indicator
lamp is ON

When VDC OFF indicator
lamp is OFF

OFF

When SLIP indicator lamp is
ON

When SLIP indicator lamp is
OFF

OFF

Actuator (solenoid) is active
(“ACTIVE TEST” with CONSULT-II) or actuator relay is
inactive (in fail-safe mode).

When actuator (solenoid) is
not active and actuator relay is
active (ignition switch ON).

OFF

When actuator (switch-over
valve) is active (“ACTIVE
TEST” with CONSULT-II) or
actuator relay is inactive (when
in fail-safe mode).

When actuator (switch-over
valve) is not active and actuator relay is active (ignition
switch ON).

OFF

BRC-112

Note: Error inspection
checklist
BRC-125, "Steering
Angle Sensor System"
BRC-127, "Yaw Rate/
Side/Decel G Sensor
System Inspection"
BRC-127, "Yaw Rate/
Side/Decel G Sensor
System Inspection"
BRC-132, "ABS/TCS/
VDC Control Unit Power
and Ground Systems
Inspection"

BRC-136, "VDC OFF
SWITCH"

—

BRC-130, "Actuator
Motor, Motor Relay, and
Circuit Inspection"

BRC-135, "CAN Communication System Inspection"

BRC-129, "Solenoid and
VDC Change-Over Valve
System Inspection"

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
Data monitor
Monitor item

DECEL G-SEN

PRESS SENSOR

FLUID LEV SW

VDC SIGNAL
TCS SIGNAL
ABS SIGNAL
EBD SIGNAL

VDC FAIL SIG
TCS FAIL SIG
ABS FAIL SIG
EBD FAIL SIG

Display content
Longitudinal acceleration detected by Decel
G-Sensor
Brake fluid pressure
detected by pressure
sensor

ON/OFF status of
brake fluid level switch

Signal status

Fail signal status

Condition

Reference value in
normal operation

Vehicle stopped

Approx. 0 G

Vehicle running

-1.7 to 1.7 G

Do not step on the Brake pedal
(When ignition switch is ON)

Approx. 0 bar

Note: Error inspection
checklist
BRC-127, "Yaw Rate/
Side/Decel G Sensor
System Inspection"

—

Step on the Brake pedal
(When ignition switch is ON)

-40 to 300 bar

When brake fluid level switch
ON

When brake fluid level switch
OFF

OFF

VDC active
TCS active
ABS active
EBD active

VDC not active
TCS not active
ABS not active
EBD not active

OFF

VDC fail
TCS fail
ABS fail
EBD fail

VDC normal
TCS normal
ABS normal
EBD normal

OFF

BRC-113

D
DI-28, "WARNING
LAMPS"

VDC system
TCS system
ABS system
EBD system

BRC

H
VDC system
TCS system
ABS system
EBD system

Note 1: Confirm tire pressure is normal.
Note 2: ON/OFF timing of ABS warning lamp
ON: For approximately 2 seconds after ignition switch is turned ON, or when a malfunction is detected.
OFF: Approximately 2 seconds after ignition switch is turned ON (when system is in normal operation) and VDC/TCS function is not
activated.
Note 3: ON/OFF timing of VDC OFF indicator lamp
ON: For approximately 2 seconds after ignition switch is turned ON, or when a malfunction is detected and VDC OFF switch is ON.
OFF: Approximately 2 seconds after ignition switch is turned ON (when system is in normal operation.) And when VDC OFF switch is
OFF.
Note 4: SLIP indicator lamp ON/OFF timing
ON: For approximately 2 seconds after ignition switch is turned ON, or when a malfunction is detected and VDC/TCS function is activated while driving.
OFF: Approximately 2 seconds after ignition switch is turned ON (when system is in normal operation) and VDC/TCS function is not
activated.
Flashing: VDC/TCS function is active during driving.

Revision: February 2006

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]

CONSULT-II Function (ABS)

EFS005HZ

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
ABS diagnostic mode
WORK SUPPORT
SELF-DIAG RESULTS
DATA MONITOR

CAN DIAG SUPPORT MNTR

The result of transmit/receive diagnosis of CAN communication can be read.

ACTIVE TEST

Operation of electrical loads can be checked by sending drive signal to them.

FUNCTION TEST
ECU PART NUMBER

Conducted by CONSULT-II instead of a technician to determine whether each system is "OK" or
"NG".
ABS actuator and electric unit (control unit) part number can be read.

CONSULT-II BASIC OPERATION PROCEDURE
1.
2.

BBIA0538E

Touch “START (NISSAN BASED VHCL)”.

BCIA0029E

Touch “ABS” in the “SELECT SYSTEM” screen.
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link
Connector (DLC) Circuit" .

BCIA0030E

Select the required diagnostic location from the “SELECT DIAG MODE” screen.
For further information, see the CONSULT-II Operation Manual.

Revision: February 2006

BRC-114

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
SELF-DIAGNOSIS
Description

If an error is detected in the system, the ABS warning lamp will turn on. In this case, perform self-diagnosis as
follows:
B

Operation Procedure
1.
2.

Turn ignition switch OFF.
Connect CONSULT-II and CONSULT-II CONVERTER to the data link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.

3.
4.
5.

Turn ignition switch ON.
Start engine and drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
E
After stopping the vehicle, with the engine running, touch “START (NISSAN BASED VHCL)”, “ABS”,
“SELF-DIAG RESULTS” in order on the CONSULT-II screen.
CAUTION:
If “START (NISSAN BASED VHCL)” is touched immediately after starting the engine or turning on BRC
the ignition switch, “ABS” might not be displayed in the SELECT SYSTEM screen. In this case,
repeat the operation from step 1.
6. The self-diagnostic results are displayed. (If necessary, the self-diagnostic results can be printed out by G
touching “PRINT”.)
● When “NO DTC IS DETECTED” is displayed, check the ABS warning lamp, SLIP indicator lamp and
VDC OFF indicator lamp.
H
7. Conduct the appropriate inspection from the display item list, and repair or replace the malfunctioning
component.
8. Start engine and drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
I
CAUTION:
● When a wheel sensor “short-circuit” is detected, if the vehicle is not driven at 30 km/h (19 MPH)
for at least 1 minute, the ABS warning lamp will not turn off even if the malfunction is repaired.
J
9. Turn ignition switch OFF to prepare for erasing the memory.
10. Start the engine and touch “START (NISSAN BASED VHCL)”, “ABS”, “SELF-DIAG RESULTS”, “ERASE”
in order on the CONSULT-II screen to erase the error memory.
K
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link Connector (DLC) Circuit" .
CAUTION:
If the error memory is not erased, re-conduct the operation from step 5.
L
11. For the final inspection, drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute and
confirm that the ABS warning lamp, SLIP indicator lamp, and VDC OFF indicator lamp are off.
M

Revision: February 2006

BRC-115

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
Display Item List
Self-diagnostic item

Malfunction detecting condition

Check system

RR RH SENSOR 1
[C1101]

Circuit of rear RH wheel sensor is open, shorted or sensor power
voltage is unusual.

RR LH SENSOR 1
[C1102]

Circuit of rear LH wheel sensor is open, shorted or sensor power
voltage is unusual.

FR RH SENSOR 1
[C1103]

Circuit of front RH wheel sensor is open, shorted or sensor power
voltage is unusual.

FR LH SENSOR 1
[C1104]

Circuit of front LH wheel sensor is open, shorted or sensor power
voltage is unusual.

RR RH SENSOR 2
[C1105]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

RR LH SENSOR 2
[C1106]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

FR RH SENSOR 2
[C1107]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

FR LH SENSOR 2
[C1108]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

ABS SENSOR
[C1115]

Wheel sensor input is abnormal.

BATTERY VOLTAGE
[ABNORMAL]
[C1109]

ABS actuator and electric unit (control unit) power voltage is too
low.

BRC-132, "ABS/TCS/
VDC Control Unit Power
and Ground Systems
Inspection"

CONTROLLER FAILURE
[C1110]

Internal malfunction of ABS actuator and electric unit (control
unit)

BRC-125, "ABS/TCS/
VDC Control Unit
Inspection"

PUMP MOTOR (Note 3)
[C1111]

BRC-123, "Wheel Sensor System Inspection"
(Note 1)

BRC-130, "Actuator
Motor, Motor Relay, and
Circuit Inspection"

G-SENSOR
[C1113]

Longitudinal G-sensor is malfunctioning, or signal line of longitudinal G-sensor is open or shorted.

BRC-127, "Yaw Rate/
Side/Decel G Sensor
System Inspection"

STOP LAMP SW
[C1116]

Stop lamp switch or circuit malfunction.

BRC-131, "Stop Lamp
Switch System Inspection"

Revision: February 2006

BRC-116

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
Self-diagnostic item

Malfunction detecting condition

Check system

FR LH IN ABS SOL
[C1120]

Circuit of front LH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

FR LH OUT ABS SOL
[C1121]

Circuit of front LH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

FR RH IN ABS SOL
[C1122]

Circuit of front RH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

FR RH OUT ABS SOL
[C1123]

Circuit of front RH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

RR LH IN ABS SOL
[C1124]

Circuit of rear LH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

RR LH OUT ABS SOL
[C1125]

Circuit of rear LH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

RR RH IN ABS SOL
[C1126]

Circuit of rear RH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

RR RH OUT ABS SOL
[C1127]

Circuit of rear RH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

ENGINE SIGNAL 1
[C1130]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ENGINE SIGNAL 2
[C1131]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ENGINE SIGNAL 3
[C1132]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ENGINE SIGNAL 4
[C1133]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ENGINE SIGNAL 6
[C1136]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ACTUATOR RLY
[C1140]

BRC-130, "Actuator
Motor, Motor Relay, and
Circuit Inspection"

ABS actuator relay or circuit malfunction.

PRESS SEN CIRCUIT
[C1142]

ABS pressure sensor circuit malfunction.

BRC-133, "Pressure
Sensor System Inspection"

ST ANGLE SEN CIRCUIT
[C1143]

Neutral position of steering angle sensor is dislocated, or steering angle sensor is malfunctioning.

BRC-125, "Steering
Angle Sensor System"

ST ANGLE SEN SIGNAL
[C1144]

Neutral position correction of steering angle sensor is not finished.

BRC-135, "Inspection
For Self-diagnosis
Result "ST ANGLE SEN
SIGNAL""

YAW RATE SENSOR
[C1145]

Yaw rate sensor has generated an error, or yaw rate sensor signal line is open or shorted.

SIDE G-SEN CIRCUIT
[C1146]

Lateral G-sensor is malfunctioning, or signal line of lateral G-sensor is open or shorted.

BR FLUID LEVEL LOW
[C1155]

Brake fluid level drops or circuit between ABS actuator and electric unit (control unit) and brake fluid level switch is open or
shorted.

BRC-133, "Brake Fluid
Level Sensor System
Inspection"

ST ANG SEN COM CIR
[C1156]

CAN communication line or steering angle sensor has generated
an error.

BRC-125, "Steering
Angle Sensor System"

Revision: February 2006

BRC-117

C
BRC-129, "Solenoid and
VDC Change-Over Valve
System Inspection"

BRC

H
BRC-124, "Engine System Inspection"

BRC-127, "Yaw Rate/
Side/Decel G Sensor
System Inspection"

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
Self-diagnostic item

Malfunction detecting condition

Check system

DECEL G SEN SET
[C1160]

ABS decel sensor adjustment is incomplete.

BRC-136, "Inspection
For Self-diagnosis
Result "DECEL G SEN
SET""

ST ANGL SEN SAFE
[C1163]

When steering angle sensor is in safe mode.

BRC-134, "Steering
Angle Sensor Safe Mode
Inspection"

CV1
[C1164]

Front side VDC switch-over solenoid valve (cut valve) is open or
shorted, or control line is open or shorted to power supply or
ground.

CV2
[C1165]

Rear side VDC switch-over solenoid valve (cut valve) is open or
shorted, or control line is open or shorted to power supply or
ground.

SV1
[C1166]

Front side VDC switch-over solenoid valve (suction valve) is
open or shorted, or control line is open or shorted to power supply or ground.

SV2
[C1167]

Rear side VDC switch-over solenoid valve (suction valve) is open
or shorted, or control line is open or shorted to power supply or
ground.

VARIANT CODING
[C1170]

V coding is not malfunctioning.

CAN COMM CIRCUIT
[U1000]

●

CAN communication line is open or shorted.

●

ABS actuator and electric unit (control unit) internal malfunction

●

Battery voltage for ECM is suddenly interrupted for approximately 0.5 second or more.

BRC-129, "Solenoid and
VDC Change-Over Valve
System Inspection"

BRC-125, "ABS/TCS/
VDC Control Unit
Inspection"

BRC-135, "CAN Communication System
Inspection" (Note 2)

Note 1. If wheel sensor 2 for each wheel is indicated, check ABS actuator and electric unit (control unit) power
supply voltage in addition to wheel sensor circuit check.
Note 2. If multiple malfunctions are detected including CAN communication line [U1000], perform diagnosis for
CAN communication line first.
Note 3. "ACTUATOR RLY" on the CONSULT-II self-diagnosis results indicates the malfunction of the actuator
motor relay or circuit.

DATA MONITOR
Operation Procedure
1.

3.
4.

After turning ignition switch OFF, connect CONSULT-II and the CONSULT-II CONVERTER to the data link
connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
Touch “START (NISSAN BASED VHCL)”, “ABS”, “DATA MONITOR” in order on the CONSULT-II screen.
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link Connector (DLC) Circuit" .
CAUTION:
When “START (NISSAN BASED VHCL)” is touched immediately after starting the engine or turning
on the ignition switch, “ABS” might not be displayed in the SELECT SYSTEM screen. In this case,
repeat the operation from step 2.
Return to the Monitor Item Selection screen, and touch “ECU INPUT SIGNALS”, “MAIN SIGNALS”, or
“SELECTION FROM MENU”. Refer to the following information.
When “START” is touched, the data monitor screen is displayed.

Revision: February 2006

BRC-118

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
Display Item List
Item
(Unit)

Data monitor item selection
Remarks

ECU INPUT
SIGNALS

MAIN
SIGNALS

SELECTION
FROM MENU

GEAR

Gear position judged by PNP
switch signal is displayed.

FR RH SENSOR
(km/h, MPH)

Wheel speed calculated by front
RH wheel sensor signal is displayed.

FR LH SENSOR
(km/h, MPH)

Wheel speed calculated by front LH
wheel sensor signal is displayed.

RR RH SENSOR
(km/h, MPH)

Wheel speed calculated by rear RH
wheel sensor signal is displayed.

RR LH SENSOR
(km/h, MPH)

Wheel speed calculated by rear LH
wheel sensor signal is displayed.

BATTERY VOLT
(V)

Voltage supplied to ABS actuator
and electric unit (control unit) is displayed.

N POSI SIG

–

Shift position judged by PNP switch
signal.

P POSI SIG

–

Shift position judged by PNP switch
signal.

ACCEL POS SIG
(%)

–

Throttle valve open/close status
judged by CAN communication signal is displayed.

ENGINE SPEED
(rpm)

Engine speed judged by CAN communication signal is displayed.

STR ANGLE SIG
(deg)

–

Steering angle detected by steering
angle sensor is displayed.

YAW RATE SEN
(d/s)

Yaw rate detected by yaw rate sensor is displayed.

DECEL G SEN
(d/s)

Longitudinal acceleration detected
by decel G-sensor is displayed.

–

Transverse acceleration detected
by side G-sensor is displayed.

STOP LAMP SW
(ON/OFF)

Stop lamp switch (ON/OFF) status
is displayed.

OFF SW
(ON/OFF)

VDC OFF switch (ON/OFF) status
is displayed.

ABS WARN LAMP
(ON/OFF)

–

ABS warning lamp (ON/OFF) status
is displayed.

SLIP LAMP
(ON/OFF)

–

SLIP indicator lamp (ON/OFF) status is displayed.

FR LH IN SOL
(ON/OFF)

–

Front LH IN ABS solenoid (ON/
OFF) status is displayed.

FR LH OUT SOL
(ON/OFF)

–

Front LH OUT ABS solenoid (ON/
OFF) status is displayed.

RR RH IN SOL
(ON/OFF)

–

Rear RH IN ABS solenoid (ON/
OFF) status is displayed.

RR RH OUT SOL
(ON/OFF)

–

Rear RH OUT ABS solenoid (ON/
OFF) status is displayed.

FR RH IN SOL
(ON/OFF)

–

Front RH IN ABS solenoid (ON/
OFF) status is displayed.

SIDE G-SENSOR
(m/s2 )

Revision: February 2006

BRC-119

2005 Xterra

BRC

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
Item
(Unit)

Data monitor item selection
Remarks

ECU INPUT
SIGNALS

MAIN
SIGNALS

SELECTION
FROM MENU

FR RH OUT SOL
(ON/OFF)

–

Front RH OUT ABS solenoid (ON/
OFF) status is displayed.

RR LH IN SOL
(ON/OFF)

–

Rear LH IN ABS solenoid (ON/
OFF) status is displayed.

RR LH OUT SOL
(ON/OFF)

–

Rear LH OUT ABS solenoid (ON/
OFF) status is displayed.

OFF LAMP
(ON/OFF)

–

OFF Lamp (ON/OFF) status is displayed.

MOTOR RELAY
(ON/OFF)

–

ABS motor relay signal (ON/OFF)
status is displayed.

ACTUATOR RLY
(ON/OFF)

–

ABS actuator relay signal (ON/
OFF) status is displayed.

CV1
(ON/OFF)

–

Front side switch-over solenoid
valve (cut valve) (ON/OFF) status is
displayed.

CV2
(ON/OFF)

–

Rear side switch-over solenoid
valve (cut-valve) (ON/OFF) status
is displayed.

SV1
(ON/OFF)

–

Front side switch-over solenoid
valve (suction valve) (ON/OFF) status is displayed.

SV2
(ON/OFF)

–

Rear side switch-over solenoid
valve (suction valve) (ON/OFF) status is displayed.

VDC FAIL SIG
(ON/OFF)

–

VDC fail signal (ON/OFF) status is
displayed.

TCS FAIL SIG
(ON/OFF)

–

TCS fail signal (ON/OFF) status is
displayed.

ABS FAIL SIG
(ON/OFF)

–

ABS fail signal (ON/OFF) status is
displayed.

EBD FAIL SIG
(ON/OFF)

–

EBD fail signal (ON/OFF) status is
displayed.

FLUID LEV SW
(ON/OFF)

–

Brake fluid level switch (ON/OFF)
status is displayed.

EBD SIGNAL
(ON/OFF)

–

EBD operation (ON/OFF) status is
displayed.

ABS SIGNAL
(ON/OFF)

–

ABS operation (ON/OFF) status is
displayed.

TCS SIGNAL
(ON/OFF)

–

TCS operation (ON/OFF) status is
displayed.

VDC SIGNAL
(ON/OFF)

–

VDC operation (ON/OFF) status is
displayed.

EBD WARN LAMP

–

Brake warning lamp (ON/OFF) status is displayed.

SLCT LVR POSI

Shift position judged by PNP switch
signal.

R POSI SIG

–

Shift position judged by PNP switch
signal.

2WD/4WD

–

It recognizes on software whether it
is 2WD and whether it is in 4WD
state.

Revision: February 2006

BRC-120

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
Item
(Unit)

Data monitor item selection

Remarks

ECU INPUT
SIGNALS

MAIN
SIGNALS

SELECTION
FROM MENU

PRESS SENSOR

–

Brake pressure detected by pressure sensor is displayed.

CRANKING SIG

–

The input state of the key SW
START position signal is displayed.

×: Applicable
–: Not applicable

ACTIVE TEST

CAUTION:
●
Do not perform active test while driving.
●
Make sure to completely bleed air from the brake system.
●
The ABS and brake warning lamps turn on during the active test.

Operation Procedure
1.

2.
3.
4.
5.
6.

Connect the CONSULT-II and CONSULT-II CONVERTER to the data link connector and start the engine. BRC
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
G
Touch “START (NISSAN BASED VHCL) ” on the display screen.
Touch “ABS”.
H
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link Connector (DLC) Circuit" .
Touch “ACTIVE TEST”.
The test item selection screen is displayed.
I
Touch necessary test item.

WFIA0349E

7.
8.

With the “MAIN SIGNALS” display selected, touch “START”.
The Active Test screen will be displayed, so conduct the following test.
M

Solenoid Valve Operation Chart
ABS solenoid valve

ABS solenoid valve (ACT)

Operation
UP

KEEP

DOWN

ACTUATOR
UP

ACTUATOR
KEEP

FR RH IN SOL

OFF

FR RH OUT SOL

OFF

ON*

OFF

FR LH IN SOL

OFF

FR LH OUT SOL

OFF

ON*

OFF

RR RH IN SOL

OFF

RR RH OUT SOL

OFF

ON*

OFF

RR LH IN SOL

OFF

RR LH OUT SOL

OFF

ON*

OFF

Primary side VDC switch over
valve 1 (SV 1)

OFF

ON*

OFF

Revision: February 2006

BRC-121

2005 Xterra

TROUBLE DIAGNOSIS
[VDC/TCS/ABS]
ABS solenoid valve
Operation

ABS solenoid valve (ACT)

KEEP

DOWN

ACTUATOR
UP

ACTUATOR
KEEP

Primary side VDC switch over
valve 1 (CV 1)

OFF

Primary side VDC switch over
valve 2 (SV 1)

OFF

ON*

OFF

Primary side VDC switch over
valve 2 (CV 1)

OFF

*: ON for 1 to 2 seconds after the touch, and then OFF

ABS MOTOR
Touch “ON” and “OFF” on the screen. Check that ABS motor relay
operates as shown in table below.
Operation

OFF

MOTOR RELAY

OFF

ACTUATOR RELAY

NOTE:
●
If active test is performed with brake pedal depressed, pedal
stroke may change. This is normal.
●
“TEST IS STOPPED” is displayed approximately 10 seconds
after operation starts.

Revision: February 2006

BRC-122

SFIA0593E

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Wheel Sensor System Inspection

PFP:00000

A
EFS005I0

INSPECTION PROCEDURE

1. CHECK TIRES

Check for inflation pressure, wear and size of each tire.
Are tire pressure and size correct and is tire wear within specifications?
YES >> GO TO 2.
NO
>> Adjust tire pressure or replace tire(s).

2. CONNECTOR INSPECTION

Disconnect the ABS actuator and electric unit (control unit) connector E125 and wheel sensor of malfunctionE
ing code.
Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
BRC
OK
>> GO TO 3.
NG
>> Repair or replace as necessary.

3. CHECK SENSOR AND SENSOR ROTOR

Check the cord of the sensor mount (for looseness, etc.)
●
Check sensor rotors for damage (rear only)
●
Check wheel bearing axial end play
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace as necessary.
●

4. CHECK WHEEL SENSOR OUTPUT SIGNAL

1.
2.

Connect ABS active wheel sensor tester (J-45741) to wheel sensor using appropriate adapter.
Turn on the ABS active wheel sensor tester power switch.
NOTE:
The green POWER indicator should illuminate. If the POWER indicator does not illuminate, replace the
battery in the ABS active wheel sensor tester before proceeding.
3. Spin the wheel of the vehicle by hand and observe the red SENSOR indicator on the ABS active wheel
sensor tester. The red SENSOR indicator should flash on and off to indicate an output signal.
NOTE:
If the red SENSOR indicator illuminates but does not flash, reverse the polarity of the tester leads and
retest.
Does the ABS active wheel sensor tester detect a signal?
YES >> GO TO 5.
NO
>> Replace the wheel sensor. Refer to BRC-144, "Removal and Installation" .

Revision: February 2006

BRC-123

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

5. CHECK WIRING HARNESS FOR SHORT CIRCUIT
1.
2.

OK or NG
OK
>> GO TO 6.
NG
>> Repair the circuit.
WFIA0343E

6. CHECK WIRING HARNESS FOR OPEN CIRCUIT
Check continuity between ABS actuator and electric unit (control unit) harness connector E125 and the malfunctioning wheel sensor harness connector E18, E117, C10 or C11.
ABS actuator and
electric unit (control unit)

Wheel sensor

Connector

Terminal

Wheel sensor
Connector

45
Front LH

33
E125

Rear LH

2
2

C11

42
Rear RH

2
1

E117

37
36

Terminal
1

E18

34
Front RH

Continuity

Yes

1
2

C10

Continuity should exist.
OK or NG
OK
>> Replace the ABS actuator and electric unit (control unit). Refer to BRC-146, "Removal and Installation" .
NG
>> Repair the circuit.

Engine System Inspection

EFS005I1

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Self-diagnosis results
ENGINE SIGNAL 1
ENGINE SIGNAL 2
ENGINE SIGNAL 3
ENGINE SIGNAL 4
ENGINE SIGNAL 6

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

Revision: February 2006

BRC-124

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

2. ENGINE SYSTEM INSPECTION

ABS/TCS/VDC Control Unit Inspection

C
EFS005I2

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK

Check self-diagnosis results.
E

Self-diagnosis results
CONTROLLER FAILURE
VARIANT CODING

BRC

Is the above displayed in the self-diagnosis display items?
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-146, "Removal and Installation" .
NO
>> Inspection End.

Steering Angle Sensor System

EFS005I3

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSIS RESULT
I

Check self-diagnosis results.
Self-diagnosis results

ST ANGLE SEN CIRCUIT
ST ANG SEN COM CIR

Is above displayed in self-diagnosis item?
YES >> GO TO 2.
NO
>> Inspection End.

2. CHECK CONNECTOR

1.
2.

Turn ignition switch OFF.
Disconnect steering angle sensor connector M47 and ABS actuator and electric unit (control unit) connector E125 and check terminals for deformation, disconnection, looseness, or damage. Repair or replace as
necessary.
3. Reconnect connectors and repeat ABS actuator and electric unit (control unit) self-diagnosis.
Is "ST ANGLE SEN CIRCUIT" or "ST ANG SEN COM CIR" displayed?
YES >> GO TO 3.
NO
>> Inspection End.

Revision: February 2006

BRC-125

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

3.
1.
2.

CHECKING STEERING ANGLE SENSOR POWER AND GROUND
Turn ignition switch ON.
Check voltage between steering angle sensor harness connector M47 and body ground.
Terminals
Measured
value
(Approx.)

(+)
Steering angle sensor
connector

(-)

Terminal
1

M47

Ground

12V
12V
WFIA0398E

3.
4.

Turn ignition switch OFF.
Check resistance between steering angle sensor harness connector M47 and body ground.
Terminals
(-)

Measured
value Ω
(Approx.)

Ground

0Ω

(+)
Steering angle sensor
connector

Terminal

M47

OK or NG
OK
>> GO TO 4.
NG
>> Repair the circuit.

WFIA0399E

4. CHECK STEERING ANGLE SENSOR HARNESS
1.
2.

Check CAN communication system. Refer to LAN-21, "CAN COMMUNICATION" .
Turn ignition switch OFF and disconnect steering angle sensor
connector M47 and ABS actuator and electric unit (control unit)
connector E125.
Check continuity between ABS actuator and electric unit (control
unit) connector E125 and steering angle sensor connector M47.
A

B
Ter- Continuity
minal

Connector

Terminal

Connector

ABS actuator and
electric unit (control unit): E125

Steering angle
sensor: M47

Yes

ABS actuator and
electric unit (control unit): E125

Steering angle
sensor: M47

Yes

WFIA0400E

OK or NG
OK
>> GO TO 5.
NG
>> Repair or replace harness.

Revision: February 2006

BRC-126

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

5. CHECK STEERING WHEEL PLAY

Check steering wheel play. Refer to PS-8, "CHECKING STEERING WHEEL PLAY" .
OK or NG
OK
>> GO TO 6.
NG
>> Adjust steering wheel play.

6. CHECK DATA MONITOR
1.
2.

Connect steering angle sensor and ABS actuator and electric unit (control unit) connectors.
Use “DATA MONITOR” to check if the status of "STR ANGLE SIG" is normal.
Steering condition

Data monitor

Straight-ahead

–3.5 deg to +3.5 deg

Turn wheel to the right by 90°

Approx. - 90deg

Turn wheel to the left by 90°

Approx. + 90deg

OK or NG
BRC
OK
>> Perform ABS actuator and electric unit (control unit) self-diagnosis again.
NG
>> Replace spiral cable (steering angle sensor) and adjust neutral position of steering angle sensor.
Refer to BRC-142, "Adjustment of Steering Angle Sensor Neutral Position" .
G

Yaw Rate/Side/Decel G Sensor System Inspection

EFS005I4

CAUTION:
Sudden turns (such as spin turns, acceleration turns), drifting, etc. when VDC function is OFF may
cause the yaw rate/side/decel G sensor system to indicate a problem. This is not a problem if normal
operation can be resumed after restarting the engine.

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
J

Check self-diagnosis results.
Self-diagnosis results

YAW RATE SENSOR
SIDE G-SEN CIRCUIT
G-SENSOR

CAUTION:
If vehicle is on turntable at entrance to parking garage, or on other moving surface, VDC OFF indicator
lamp may illuminate and CONSULT-II self-diagnosis may indicate yaw rate sensor system malfunction.
However, in this case there is no malfunction in yaw rate sensor system. Take vehicle off of turntable
or other moving surface, and start engine. Results will return to normal.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION
Disconnect the ABS actuator and electric unit (control unit) connector E125 and yaw rate/side/decel G sensor
connector B73.
Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace as necessary.

Revision: February 2006

BRC-127

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

3. YAW RATE/SIDE/DECEL G SENSOR HARNESS INSPECTION
1.
2.

Turn off the ignition switch and disconnect yaw rate/side/decel G sensor connector B73 and ABS actuator
and electric unit (control unit) connector E125.
Check continuity between the ABS actuator and electric unit (control unit) connector E125 and the yaw
rate/side/decel G sensor connector B73.
ABS actuator and electric unit
(control unit) harness connector
E125

Yaw rate/side/decel G sensor
harness connector B73

Continuity

Yes

OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace as necessary.

4. YAW RATE/SIDE/DECEL G SENSOR INSPECTION
1.
2.

Connect the yaw rate/side/decel G sensor connector B73 and ABS actuator and electric unit (control unit)
connector E125.
Use “DATA MONITOR” to check if the yaw rate/side/decel G sensor signals are normal.
Vehicle status

Yaw rate sensor
(Data monitor standard)

Side G sensor
(Data monitor standard)

Decel G Sensor
(Data monitor standard)

When stopped

-4 to +4 deg/s

-1.1 to +1.1 m/s

-0.08 G to +0.08 G

Right turn

Negative value

Left turn

Positive value

Speed up

Negative value

Speed down

Positive value

OK or NG
OK
>> Inspection End.
NG
>> Replace the yaw rate/side/decel G sensor. Refer to BRC-149, "Removal and Installation" .

Revision: February 2006

BRC-128

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

Solenoid and VDC Change-Over Valve System Inspection

EFS005I5

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
B

Check self-diagnosis results.
Self-diagnosis results

FR LH IN ABS SOL
FR LH OUT ABS SOL
RR RH IN ABS SOL

RR RH OUT ABS SOL
FR RH IN ABS SOL

FR RH OUT ABS SOL
RR LH IN ABS SOL
RR LH OUT ABS SOL

BRC

CV 1
CV 2
SV 1

SV 2

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION

Revision: February 2006

BRC-129

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

3.
1.

Body
ground
—

Measured
value
(Approx.)
12V

WFIA0195E

Check resistance between ABS actuator and electric unit (control unit) harness connector E125 and body ground.
ABS actuator and electric
unit (control unit)
harness connector E125
16
47

Body
ground
—
—

Measured
value Ω
(Approx.)
0Ω
0Ω

OK or NG
OK
>> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-146, "Removal and Installation" .
NG
>> Repair the circuit.

Actuator Motor, Motor Relay, and Circuit Inspection

WFIA0196E

EFS005I6

INSPECTION PROCEDURE

1. CHECKING SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Self-diagnosis results
PUMP MOTOR
ACTUATOR RLY

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

Revision: February 2006

BRC-130

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

3.
1.

CHECKING ABS MOTOR AND MOTOR RELAY POWER SYSTEM

Check voltage between ABS actuator and electric unit (control
unit) harness connector E125 and body ground.
ABS actuator and electric
unit (control unit)
harness connector E125
1

Measured
value
(Approx.)
12V

Body
ground
—

D
WFIA0209E

Check resistance between ABS actuator and electric unit (control unit) connector E125 and body ground.
ABS actuator and electric
unit (control unit)
harness connector E125
16
47

Measured
value Ω
(Approx.)
0Ω
0Ω

Body
ground
—
—

Stop Lamp Switch System Inspection

BRC

WFIA0196E

I
EFS005I7

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.

K
Self-diagnosis results
STOP LAMP SW

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION
1.

Revision: February 2006

BRC-131

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

3. STOP LAMP SWITCH INSPECTION
Check the voltage between the ABS actuator and electric unit (control unit) harness connector E125 terminal 41 and body ground.
Brake pedal depressed

: Battery voltage
(approx. 12V)
Brake pedal not depressed : Approx. 0V
OK or NG
OK
>> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-146, "Removal and Installation" .
NG
>> Refer to LT-81, "STOP LAMP" .

WFIA0198E

ABS/TCS/VDC Control Unit Power and Ground Systems Inspection

EFS005I8

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Self-diagnosis results
BATTERY VOLTAGE

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

3. ABS/TCS/VDC CONTROL UNIT POWER AND GROUND CIRCUIT INSPECTION
Measure the voltage and continuity between the ABS actuator and electric unit (control unit) harness connector E125 and body ground.
Signal name

ABS actuator and electric unit
(control unit)
harness connector E125

Power supply
Ground

1
32
16
47

Body
ground

Measured value

—

Battery voltage (Approx. 12V)

—

Continuity should exist.

OK or NG
OK
>> Check the battery for loose terminals, low voltage, etc. Repair as necessary.
NG
>> Repair the circuit.

Revision: February 2006

BRC-132

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

Brake Fluid Level Sensor System Inspection

EFS005I9

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
1.
2.

Check the brake reservoir tank fluid level. If the level is low, add brake fluid.
Erase the self-diagnosis results and check the self-diagnosis results.

Self-diagnosis results
BR FLUID LEVEL LOW

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION

Disconnect the ABS actuator and electric unit (control unit) connector E125 and brake fluid level switch
connector E21.
BRC
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
G
OK
>> GO TO 3.
NG
>> Repair or replace as necessary.

3. CHECK THE HARNESS BETWEEN THE BRAKE FLUID LEVEL SENSOR AND THE ABS ACTUATOR

AND ELECTRIC UNIT (CONTROL UNIT)
Check the continuity between the brake fluid level switch harness connector E21 and the ABS actuator and
electric unit (control unit) harness connector E125.
ABS actuator and electric unit
(control unit) harness connector
E125

Brake fluid level switch harness
connector E21

Continuity

Yes

Ground

Yes

OK or NG
OK
>> Perform self-diagnosis again. If the same results appear, replace ABS actuator and electric unit
(control unit). Refer to BRC-146, "Removal and Installation" .
NG
>> Repair the circuit.

Pressure Sensor System Inspection

EFS005IA

INSPECTION PROCEDURE

1. DISPLAY SELF DIAGNOSIS RESULTS
Check self-diagnosis result display item.
Self-diagnosis results
PRESS SEN CIRCUIT

Is the self-diagnosis result display item shown above displayed?
YES >> GO TO 2.
NO
>> Inspection End.

Revision: February 2006

BRC-133

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

2. CONNECTOR INSPECTION
1.
2.

3. FRONT PRESSURE SENSOR CIRCUIT INSPECTION
1.

Front pressure sensor harness
connector E31

Continuity

Yes

Measure the continuity between the ABS actuator and electric unit (control unit) harness connector E125
and body ground.
ABS actuator and electric unit (control
unit) harness connector E125

Body ground

Continuity

—

18
19
20
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness or connector.

4. FRONT PRESSURE SENSOR INSPECTION
1.
2.

Data monitor display (Approx.)
PRESS SENSOR
Positive value
0 bar

OK or NG
OK
>> Inspection End.
NG
>> Replace front pressure sensor.

Steering Angle Sensor Safe Mode Inspection

EFS005IB

INSPECTION PROCEDURE

1. INDICATOR LAMP CHECK
Check that VDC OFF indicator lamp is on.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.

Revision: February 2006

BRC-134

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

2. ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Adjust steering angle sensor neutral position. Refer to BRC-142, "Adjustment of Steering Angle Sensor Neutral Position" .
OK or NG
OK
>> GO TO 3.
NG
>> Check steering angle sensor. Refer to BRC-125, "Steering Angle Sensor System" .

3. INDICATOR LAMP CHECK
Check that VDC OFF indicator lamp is off.
OK or NG
OK
>> GO TO 4.
NG
>> Perform basic inspection. Refer to BRC-109, "Basic Inspection" .

4. CHECK SELF-DIAGNOSTIC RESULTS
Perform ABS actuator and electric unit (control unit) self-diagnosis.

BRC

Self-diagnosis results
ST ANGL SEN SAFE

NOTE:
When self-diagnostic results show items other than those above, perform repair or replacement for the item
indicated and repeat self-diagnosis.
Is the above displayed on self-diagnosis display?
YES >> Erase error memory.
NO
>> Inspection End.

CAN Communication System Inspection

EFS005IC

INSPECTION PROCEDURE

1. CHECK CONNECTOR
1.

Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector, and check
the terminals for deformation, disconnection, looseness, and so on. If there is a malfunction, repair or
replace the terminal.
2. Reconnect connector to perform self-diagnosis.
Is "CAN COMM CIRCUIT" displayed in self-diagnosis display items?
YES >> Print out the self-diagnostic results, and refer to LAN-21, "CAN COMMUNICATION" .
NO
>> Connector terminal is loose, damaged, open, or shorted.

Inspection For Self-diagnosis Result "ST ANGLE SEN SIGNAL"

EFS005ID

INSPECTION PROCEDURE

1. PERFORM SELF-DIAGNOSIS
Perform ABS actuator and electric unit (control unit) self-diagnosis.
Self-diagnosis results
ST ANGLE SEN SIGNAL

Do self-diagnosis results indicate anything other than shown above?
YES >> Perform repair or replacement for the item indicated.
NO
>> Perform adjustment of steering angle sensor neutral position. Refer to BRC-142, "Adjustment of
Steering Angle Sensor Neutral Position" . GO TO 2.

Revision: February 2006

BRC-135

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[VDC/TCS/ABS]

2. PERFORM SELF-DIAGNOSIS AGAIN
1. Turn the ignition switch to OFF and then to ON and erase self-diagnosis results.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis again.
Are any self-diagnosis results displayed?
YES >> Replace steering angle sensor. Refer to BRC-148, "Removal and Installation" .
NO
>> Inspection End.

Inspection For Self-diagnosis Result "DECEL G SEN SET"

EFS005IE

INSPECTION PROCEDURE

1. PERFORM SELF-DIAGNOSIS
Perform ABS actuator and electric unit (control unit) self-diagnosis.
Self-diagnosis results
DECEL G SEN SET

Do self-diagnosis results indicate anything other than shown above?
YES >> Perform repair or replacement for the item indicated.
NO
>> Perform calibration of decel G sensor. Refer to BRC-142, "Calibration of Decel G Sensor" . GO
TO 2.

2. PERFORM SELF-DIAGNOSIS AGAIN
1. Turn the ignition switch to OFF and then to ON and erase self-diagnosis results.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis again.
Are any self-diagnosis results displayed?
YES >> Replace decel G sensor. Refer to BRC-149, "Removal and Installation" .
NO
>> Inspection End.

VDC OFF Indicator lamp Does Not Illuminate

EFS005IF

INSPECTION PROCEDURE

1. CHECK VDC OFF INDICATOR LAMP
Disconnect ABS actuator and electric unit (control unit) connector E125.
Do the ABS warning lamp and VDC OFF indicator lamp illuminate?
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-146, "Removal and Installation" .
NO
>> Replace combination meter. Refer to IP-12, "COMBINATION METER" .

Component Inspection

EFS005IG

VDC OFF SWITCH
Check the continuity between terminals 1 and 2.
1-2

: Continuity should exist when pushing the
switch.
Continuity should not exist when releasing
the switch.

PFIA0307E

Revision: February 2006

BRC-136

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[VDC/TCS/ABS]

TROUBLE DIAGNOSES FOR SYMPTOMS
ABS Works Frequently

PFP:99999

A
EFS005IH

1. CHECK WARNING LAMP ACTIVATION

Make sure warning lamp remains off while driving.
OK or NG
OK
>> GO TO 2.
NG
>> Carry out self-diagnosis. Refer to BRC-115, "SELF-DIAGNOSIS" .

BRC

3. CHECK FRONT AND REAR AXLES

4. CHECK BRAKE FLUID PRESSURE
Check brake fluid pressure distribution.
Refer to BRC-109, "Basic Inspection" .
Is brake fluid pressure distribution normal?
YES >> Inspection End.
NO
>> Perform Basic Inspection. Refer to BRC-109, "Basic Inspection" .

Revision: February 2006

BRC-137

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[VDC/TCS/ABS]

Unexpected Pedal Action

EFS005II

1. CHECK WARNING LAMP ACTIVATION
Make sure warning lamp remains off while driving.
OK or NG
OK
>> GO TO 2.
NG
>> Carry out self-diagnosis. Refer to BRC-115, "SELF-DIAGNOSIS" .

2. CHECK BRAKE PEDAL STROKE
Check brake pedal stroke.
Is pedal stroke excessive?
YES >> Perform Basic Inspection. Refer to BRC-109, "Basic
Inspection" .
NO
>> GO TO 3.

SBR540A

3. CHECK CONNECTOR AND BRAKING PERFORMANCE
1.
2.

Revision: February 2006

BRC-138

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[VDC/TCS/ABS]

Long Stopping Distance

EFS005IJ

1. CHECK BASE BRAKING SYSTEM PERFORMANCE
1.
2.

Disable ABS by disconnecting ABS actuator and electric unit (control unit) connector.
Drive vehicle and check brake operation.
NOTE:
● Stopping distance may be longer than vehicles without ABS when road condition is slippery.
● Driving the vehicle with the ABS actuator and electric unit (control unit) disconnected may induce DTCs
in electrical control units using CAN communication. After the inspection, clear all DTCs. Refer to LAN21, "CAN COMMUNICATION" .
OK or NG
OK
>> Go to BRC-137, "ABS Works Frequently" .
NG
>> Perform Basic Inspection. Refer to BRC-109, "Basic Inspection" .

ABS Does Not Work

EFS005IK

BRC

CAUTION:
The ABS does not operate when the vehicle speed is 10 km/h (6 MPH) or less.

1. CHECK WARNING LAMP ACTIVATION
Turn ignition switch ON and check for warning lamp activation.
●
Warning lamp should activate for approximately 2 seconds after turning the ignition switch ON.
OK or NG
OK
>> Carry out self-diagnosis. Refer to BRC-115, "SELF-DIAGNOSIS" .
NG
>> Go to BRC-140, "ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On" .

Pedal Vibration or ABS Operation Noise

EFS005IL

NOTE:
During ABS activation, pedal vibration may be felt and a noise may be heard. This is normal and does not indicate a malfunction.

1. CHECK SYMPTOM
L

1. Apply brake.
2. Start engine.
Does the symptom occur only when engine is started?
YES >> Carry out self-diagnosis. Refer to BRC-115, "SELF-DIAGNOSIS" .
NO
>> GO TO 2.

2. RECHECK SYMPTOM
Does the symptom occur only when electrical equipment switches (such as headlamps) are turned on?
YES
NO

>> Check for radio, antenna or related wiring that is routed too close to the ABS actuator and electric
unit (control unit) and reroute as necessary.
>> Go to BRC-137, "ABS Works Frequently" .

Revision: February 2006

BRC-139

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[VDC/TCS/ABS]

ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On

EFS005IM

2. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY CIRCUITS
1.

3. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check continuity between ABS actuator and electric unit (control
unit) connector terminal 16 and ground and terminal 47 and ground.
Does continuity exist?
YES >> Replace ABS actuator and electric unit (control unit).
Refer to BRC-146, "Removal and Installation" .
NO
>> Repair harness or connectors between ABS actuator
and electric unit (control unit) and ground.

WFIA0196E

ABS Warning Lamp Stays On When Ignition Switch Is Turned On

EFS005IN

1. CARRY OUT SELF-DIAGNOSIS
Carry out self-diagnosis. Refer to BRC-115, "SELF-DIAGNOSIS" .
Are malfunctions detected in self-diagnosis?
YES >> Refer to BRC-116, "Display Item List" .
NO
>> Refer to DI-28, "WARNING LAMPS" .

Revision: February 2006

BRC-140

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[VDC/TCS/ABS]

Vehicle Jerks During TCS/VDC Activation

EFS005IO

1. ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
Perform ABS actuator and electric unit (control unit) self-diagnosis.
Are self-diagnosis result items displayed?
YES >> After checking and repairing the applicable item, perform the ABS actuator and electric unit (control unit) self-diagnosis again.
NO
>> GO TO 2.

2. ENGINE SPEED SIGNAL INSPECTION

Perform data monitor with CONSULT-II for the ABS actuator and electric unit (control unit).
Is the engine speed at idle 400 rpm or higher?
YES >> GO TO 4.
NO
>> GO TO 3.

3. ECM SELF-DIAGNOSIS

BRC

Perform ECM self-diagnosis.
Are self-diagnosis result items displayed?
YES >> After checking and repairing the applicable item, perform the ECM self-diagnosis again.
NO
>> With A/T, GO TO 4. With M/T, GO TO 5.

4. TCM SELF-DIAGNOSIS
Perform TCM self-diagnosis.
Are self-diagnosis result items displayed?
YES >> After checking and repairing the applicable item, perform the TCM self-diagnosis again.
NO
>> GO TO 5.

5. CONNECTOR INSPECTION
Disconnect the ABS actuator and electric unit (control unit) connector and the ECM connectors and check the
terminals for deformation, disconnection, looseness or damage.
OK or NG
OK
>> GO TO 6.
NG
>> Repair or replace as necessary.

6. CAN COMMUNICATION INSPECTION

Check the CAN communication system. Refer to BRC-135, "CAN Communication System Inspection" .
OK or NG
OK
>> Inspection End.
NG
>> Refer to LAN-21, "CAN COMMUNICATION" .

Revision: February 2006

BRC-141

2005 Xterra

ON-VEHICLE SERVICE
[VDC/TCS/ABS]

ON-VEHICLE SERVICE
Adjustment of Steering Angle Sensor Neutral Position

PFP:00000
EFS005IP

After removing/installing or replacing ABS actuator and electric unit (control unit), steering angle sensor, steering and suspension components which affect wheel alignment or after adjusting wheel alignment, be sure to
adjust neutral position of steering angle sensor before running vehicle.

WITH CONSULT-II
1.
2.

Stop vehicle with front wheels in straight-ahead position.
Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector on vehicle, and turn ignition switch ON (do not
start engine).
Touch “ABS”, “WORK SUPPORT” and “ST ANGLE SENSOR
ADJUSTMENT” on CONSULT-II screen in this order.

BBIA0538E

Touch “START”.
CAUTION:
Do not touch steering wheel while adjusting steering angle
sensor.
5. After approximately 10 seconds, touch “END”. (After approximately 60 seconds, it ends automatically.)
6. Turn ignition switch OFF, then turn it ON again.
CAUTION:
Do not touch steering wheel while adjusting steering angle
sensor.
WFIA0239E
7. Run vehicle with front wheels in straight-ahead position, then
stop.
8. Select “DATA MONITOR”, “SELECTION FROM MENU”, and “STR ANGLE SIG” on CONSULT-II screen.
Then check that “STR ANGLE SIG” is within 0±3.5 deg. If value is more than specification, repeat steps 3
to 7.
9. Erase memory of ABS actuator and electric unit (control unit) and ECM.
10. Turn ignition switch to OFF.

WITHOUT CONSULT-II
Set the steering wheel in a straight forward position and drive the vehicle at 10 mph (15 km/h) or more for 10
minutes. When the procedure is complete, the SLIP indicator lamp and VDC OFF indicator lamp will turn off.

Calibration of Decel G Sensor

EFS005IQ

After removing/installing or replacing ABS actuator and electric unit (control unit), yaw rate/side/decel G sensor, steering and suspension components which affect wheel alignment or after adjusting wheel alignment, be
sure to calibrate the decel G sensor before running vehicle.
NOTE:
Calibration of decel G sensor requires CONSULT-II.
1. Stop vehicle with front wheels in straight-ahead position.
CAUTION:
● The work should be done on a level area with an unloaded vehicle.
● Keep all the tires inflated to the correct pressures. Adjust the tire pressure to the specified pressure value.
2. Connect CONSULT-II with CONSULT-II CONVERTER to data link connector on vehicle, and turn ignition
switch ON (do not start engine).

Revision: February 2006

BRC-142

2005 Xterra

ON-VEHICLE SERVICE
[VDC/TCS/ABS]
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be A
detected in self-diagnosis depending on control unit which carries out CAN communication.
3. Touch "START (NISSAN BASED VHCL)", "ABS", "WORK SUPPORT" and "DECEL G SEN CALIBRATION" on CONSULT-II screen in this order. Refer to BRC-114, "CONSULT-II BASIC OPERATION PRO- B
CEDURE" .
4. Touch "START".
CAUTION:
C
Set vehicle as shown in the display.
5. After approximately 10 seconds, touch "END". (After approximately 60 seconds, it ends automatically.)
D
6. Turn ignition switch OFF, then turn it ON again.
CAUTION:
Be sure to carry out above operation.
E
7. Run vehicle with front wheels in straight-ahead position, then
stop.
SFIA1162E
8. Select "DATA MONITOR", "SELECTION FROM MENU", and
BRC
"DECEL G SEN" on CONSULT-II screen. Then check that "DECEL G SEN" is within ±0.08G. If value is
more than specification, repeat steps 3 to 7.
9. Erase memory of ABS actuator and electric unit (control unit) and ECM.
G
10. Turn ignition switch to OFF.
H

Revision: February 2006

BRC-143

2005 Xterra

WHEEL SENSORS
[VDC/TCS/ABS]

WHEEL SENSORS
Removal and Installation

PFP:47910
EFS005SF

WFIA0339E

Front wheel sensor

Rear wheel sensor (C200)

Rear wheel sensor (M226)

REMOVAL
1.

INSTALLATION
●

–
–

–

●

Revision: February 2006

BRC-144

2005 Xterra

SENSOR ROTOR
[VDC/TCS/ABS]

SENSOR ROTOR
Removal and Installation

PFP:47970

A
EFS005SG

FRONT
The wheel sensor rotors are built into the wheel hubs and are not removable. If damaged, replace wheel hub
and bearing assembly. Refer to FAX-5, "Removal and Installation" .

REAR (C200)
Removal and Installation

It is necessary to disassemble the rear axle to replace the sensor rotor. Perform the axle shaft assembly
removal procedure to replace sensor rotor. Refer to RAX-7, "Removal and Installation" .
D

REAR (M226)
Removal
1.

: 205-D002 (

—

BRC

)

Installation
1.

Install new sensor rotor on axle shaft using a suitable length
steel tube and a press. Make sure sensor rotor is fully seated.
CAUTION:
Do not reuse the old sensor rotor.
Install axle shaft assembly. Refer to RAX-7, "Removal and
Installation" (C200), or RAX-19, "Removal and Installation"
(M266).
CAUTION:
Do not reuse the axle oil seal. The axle oil seal must be
replaced every time the axle shaft assembly is removed
from the axle shaft housing.

J
WFIA0341E

Revision: February 2006

BRC-145

2005 Xterra

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
[VDC/TCS/ABS]

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Removal and Installation

PFP:47660
EFS005SJ

WFIA0389E

To rear left

To rear right

To front left

To front right

From the master cylinder secondary
side

From the master cylinder primary
side

ABS actuator and electric unit (control unit)

Harness connector

Grommet

10. Collar

REMOVAL
1.
2.
3.

4.
5.

Revision: February 2006

BRC-146

2005 Xterra

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
[VDC/TCS/ABS]
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
To install, use a flare nut wrench (commercial service tool).
●
Always tighten brake tubes to specification when installing. Refer to BR-11, "BRAKE PIPING AND
HOSE" .
●
Never reuse drained brake fluid.
●
After installation of the ABS actuator and electric unit (control unit), refill brake system with new
brake fluid. Then bleed the air from the system. Refer to BR-10, "Bleeding Brake System" .
NOTE:
If the ABS actuator and electric unit (control unit) is replaced, make sure to adjust position of steering angle
sensor. Refer to BRC-142, "Adjustment of Steering Angle Sensor Neutral Position" .

BRC

Revision: February 2006

BRC-147

2005 Xterra

STEERING ANGLE SENSOR
[VDC/TCS/ABS]

STEERING ANGLE SENSOR
Removal and Installation

PFP:25554
EFS005IU

Refer to SRS-44, "Removal and Installation" .
NOTE:
●
The steering angle sensor is an integral part of the spiral cable.
●
If the ABS actuator and electronic unit (control unit) is replaced, make sure to adjust position of steering
angle sensor. Refer to BRC-142, "Adjustment of Steering Angle Sensor Neutral Position" .

Revision: February 2006

BRC-148

2005 Xterra

G SENSOR
[VDC/TCS/ABS]

G SENSOR
Removal and Installation

PFP:47930

A
EFS005IV

REMOVAL
1.
2.

Remove center console. Refer to IP-15, "CENTER CONSOLE" .
Remove yaw rate/side/decel G sensor attaching nuts as shown.
● The location of the sensor is the same for all models.
CAUTION:
● Do not use power tools to remove or install yaw rate/side/
decel G sensor.
● Do not drop or strike the yaw rate/side/decel G sensor.
Disconnect harness connector and remove the yaw rate/side/
decel G sensor.

E
WFIA0230E

INSTALLATION
BRC
Installation is in the reverse order of removal.
NOTE:
After performing the above work, calibrate the decel G sensor. Refer to BRC-142, "Calibration of Decel G Sensor" .
G

Revision: February 2006

BRC-149

2005 Xterra

PRECAUTIONS
[HDC/HSA/VDC/TCS/ABS]

PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”

EFS005U4

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Manual.
WARNING:
●
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer.
●
Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
●
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.

Precautions for Brake System

EFS005IX

Precautions When Using CONSULT-II

EFS005IY

CHECK POINTS FOR USING CONSULT-II
1.

Has CONSULT-II been used without connecting CONSULT-II CONVERTER on this vehicle?
● If YES, GO TO 2.

Revision: February 2006

BRC-150

2005 Xterra

PRECAUTIONS
[HDC/HSA/VDC/TCS/ABS]
If NO, GO TO 5.
Is there any indication other than indications relating to CAN communication system in the self-diagnosis
results?
● If YES, GO TO 3.
● If NO, GO TO 4.
Based on self-diagnosis results unrelated to CAN communication, carry out the inspection.
Malfunctions may be detected in self-diagnosis depending on control units carrying out CAN communication. Therefor, erase the self-diagnosis results.
Diagnose CAN communication system. Refer to LAN-21, "CAN COMMUNICATION" .
●

3.
4.
5.

Precautions for Brake Control
●
●
●
●
●

●
●
●
●

●

●
●

●

●
●

●

EFS005IZ

During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.
E
During HDC operation, a mechanical noise may be heard. This is normal.
Just after starting vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check.
Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel, BRC
or snow-covered (fresh, deep snow) roads.
When an error is indicated by ABS or another warning lamp, collect all necessary information from customer (what symptoms are present under what conditions) and check for simple causes before starting G
diagnosis. Besides electrical system inspection, check brake booster operation, brake fluid level, and fluid
leaks.
If incorrect tire sizes or types are installed on the vehicle or brake pads are not Genuine NISSAN parts, H
stopping distance or steering stability may deteriorate.
If there is a radio, antenna or related wiring near control module, ABS function may have a malfunction or
error.
I
If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits or improper wiring.
If the following components are replaced with non-genuine components or modified, the VDC OFF indica- J
tor lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Components
related to suspension (shock absorbers, struts, springs, bushings, etc.), tires, wheels (exclude specified
size), components related to brake system (pads, rotors, calipers, etc.), components related to engine
K
(muffler, ECM, etc.), components related to body reinforcement (roll bar, tower bar, etc.).
Driving with broken or excessively worn suspension components, tires or brake system components may
cause the VDC OFF indicator lamp and the SLIP indicator lamp to turn on, and the VDC system may not
L
operate properly.
When the TCS or VDC is activated by sudden acceleration or sudden turn, some noise may occur. The
noise is a result of the normal operation of the TCS and VDC.
When driving on roads which have extreme slopes (such as mountainous roads) or high banks (such as M
sharp curves on a freeway), the VDC may not operate normally, or the VDC warning lamp and the SLIP
indicator lamp may turn on. This is not a problem if normal operation can be resumed after restarting the
engine.
Sudden turns (such as spin turns, acceleration turns), drifting, etc. with VDC turned off may cause the yaw
rate/side G sensor to indicate a problem. This is not a problem if normal operation can be resumed after
restarting the engine.
If battery is removed or steering angle sensor is disconnected, power to steering angle sensor is lost and
the screen goes into steering angle sensor safe mode.
When screen goes into steering angle sensor safe mode, perform "Adjustment of Steering Angle Sensor
Neutral Position" with CONSULT-II and check that VDC OFF indicator turns off. Additionally, perform selfdiagnosis, check that only "Steering Angle Sensor Safe Mode" is shown for self-diagnostic result, and
then delete the memory. (If the self-diagnostic result shows an indication other than "Steering Angle Sensor Safe Mode", repair the relevant part and restart self-diagnosis.) The steering angle sensor is released
and returns to normal condition by performing the above operation.
When checking, if only "Steering Angle Sensor Safe Mode" is shown in the self-diagnostic result and VDC
OFF indicator is off, delete history of malfunction. This happens when battery power supply is lost and the
screen goes into Steering Angle Sensor Safe Mode, and then screen returns to normal mode automati-

Revision: February 2006

BRC-151

2005 Xterra

PRECAUTIONS
[HDC/HSA/VDC/TCS/ABS]
cally by driving the vehicle in a straight forward direction [for approximately 30 seconds at 20 km/h (12
MPH) or more] after power is supplied again.
NOTE:
VDC OFF indicator lamp is on when VDC OFF switch is on.

Precautions for CAN System
●
●
●
●

EFS005J0

PKIA0306E

●

Do not make a bypass connection to repaired area. (If the circuit
is bypassed, characteristics of twisted wire will be lost.)

PKIA0307E

Wiring Diagrams and Trouble Diagnosis

EFS005J1

Revision: February 2006

BRC-152

2005 Xterra

PREPARATION
[HDC/HSA/VDC/TCS/ABS]

PREPARATION
Special Service Tool

PFP:00002

A
EFS005J2

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name

Description

—
(J-45741)
ABS active wheel sensor tester

Checking operation of ABS active wheel
sensors

WFIA0101E

205-D002
(
—
)
Bearing replacer

E
Removing sensor rotor

BRC

ZZA0700D

Commercial Service Tools

EFS005J3

Tool name

Description

1. Flare nut crowfoot
2. Torque wrench

Removing and installing brake piping
a: 10 mm (0.39 in)/12 mm (0.47 in)

J
S-NT360

Revision: February 2006

BRC-153

2005 Xterra

SYSTEM DESCRIPTION
[HDC/HSA/VDC/TCS/ABS]

SYSTEM DESCRIPTION
System Components

PFP:00000
EFS005J4

WFIA0347E

Revision: February 2006

BRC-154

2005 Xterra

SYSTEM DESCRIPTION
[HDC/HSA/VDC/TCS/ABS]

ABS Function
●

●
●
●
●
●

EFS005J5

●
●
●
●

●
●
●

EFS005J7

In addition to the ABS/TCS function, the driver steering amount and brake operation amount are detected
from the steering angle sensor and pressure sensors, and the vehicle's driving status (amount of under
steering/over steering) is determined using inputs from the yaw rate sensor/side G sensor, wheel speed
sensors, etc. and this information is used to improve vehicle stability by controlling the braking and engine
torque application to the wheels.
The SLIP indicator lamp flashes to inform the driver of VDC operation.
During VDC operation, the vehicle body and brake pedal may vibrate lightly and a mechanical noise may
be heard. This is normal.
The ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp may turn on when the vehicle is
subject to strong shaking or large vibration, such as when the vehicle is on a turntable or a ship while the
engine is running or on a steep slope. In this case, restart the engine on a normal road and if the ABS
warning lamp, VDC OFF indicator lamp and SLIP indicator lamp turn off, there is no problem.

HDC Function
●

Electronic Brake Distribution is a function that detects subtle slippages between the front and rear wheels
during braking, and it improves handling stability by electronically controlling the brake fluid pressure BRC
which results in reduced rear wheel slippage.
If the electrical system malfunctions, the Fail-Safe function is activated, the EBD and ABS become inoperative, and the ABS warning lamp and brake warning lamp are turned on.
G
The electrical system can be diagnosed using CONSULT-II.
During EBD operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.
H
Just after starting the vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check.

VDC Function
●

EFS005J6

TCS Function
●

EBD Function
●

EFS005J9

The hill descent control system will help maintain vehicle speed when driving under 25-35 km/h (15-21
MPH) on steeper downhill grades. HDC will provide braking allowing the driver to concentrate on steering
while reducing the burden of brake and accelerator operation.

Revision: February 2006

BRC-155

2005 Xterra

SYSTEM DESCRIPTION
[HDC/HSA/VDC/TCS/ABS]
●
●
●

To operate the system, set the 4WD switch to 4H or 4 LO and push the HDC switch. The HDC indicator in
the combination meter will turn on. While HDC is operating, the stop/tail lamps will illuminate.
If the accelerator or brake pedal is depressed while the HDC system is on, the system will stop operating.
During HDC operation, a mechanical noise may be heard. This is normal.

HSA Function
●
●

EFS005JA

The HSA system will assist the driver by applying the brake automatically and preventing the vehicle from
rolling backward when starting on an uphill.
The maximum holding time is 2 seconds. After 2 seconds, the vehicle will begin to roll back gradually and
then HSA will stop operating completely.

Fail-Safe Function

EFS005JB

CAUTION:
If the Fail-Safe function is activated, perform the Self Diagnosis for ABS/TCS/VDC system.

ABS/EBD SYSTEM
In case of an electrical malfunction with the ABS, the ABS warning lamp, VDC OFF indicator lamp and SLIP
indicator lamp will turn on. In case of an electrical malfunction with the EBD system, the brake warning lamp,
ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp will turn on.
The system will revert to one of the following conditions of the Fail-Safe function.
1. For ABS malfunction, only the EBD is operative and the condition of the vehicle is the same condition of
vehicles without ABS/TCS/VDC system.
2. For EBD malfunction, the EBD and ABS become inoperative, and the condition of the vehicle is the same
as the condition of vehicles without ABS/TCS/VDC or EBD system.

HDC/HSA SYSTEM
●
●

In case of HDC system malfunction, the HDC indicator lamp will remain off even though the HDC switch is
operated and the condition of the vehicle is the same as the condition of vehicles without HDC system.
In case of HSA system malfunction, the VDC OFF and SLIP indicator lamps are turned on and the condition of the vehicle is the same as the condition of vehicles without HSA system.

Revision: February 2006

BRC-156

2005 Xterra

SYSTEM DESCRIPTION
[HDC/HSA/VDC/TCS/ABS]

Hydraulic Circuit Diagram

EFS005JC

BRC

J
WFIA0187E

Revision: February 2006

BRC-157

2005 Xterra

CAN COMMUNICATION
[HDC/HSA/VDC/TCS/ABS]

CAN COMMUNICATION
System Description

PFP:23710
EFS005JD

Refer to LAN-21, "CAN COMMUNICATION" .

Revision: February 2006

BRC-158

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]

TROUBLE DIAGNOSIS
How to Perform Trouble Diagnoses for Quick and Accurate Repair

PFP:00000

A
EFS005JE

INTRODUCTION
The ABS/TCS/VDC/HDC/HSA system has an electronic control unit
to control major functions. The control unit accepts input signals from
sensors and controls actuator operation. It is also important to check
for conventional problems such as air leaks in the booster or lines,
lack of brake fluid, or other problems with the brake system.
It is much more difficult to diagnose a problem that occurs intermittently rather than continuously. Most intermittent problems are
caused by poor electrical connections or faulty wiring. In this case,
careful checking of suspicious circuits may help prevent the replacement of good parts.
A visual check only may not find the cause of the problem, so a road
test should be performed.
Before undertaking actual checks, take just a few minutes to talk with
a customer who approaches with a ABS/TCS/VDC/HDC/HSA complaint. The customer is a very good source of information on such
problems, especially intermittent ones. Through the talks with the
customer, find out what symptoms are present and under what conditions they occur.
Start your diagnosis by looking for “conventional” problems first. This
is one of the best ways to troubleshoot brake problems on a ABS/
TCS/VDC/HDC/HSA equipped vehicle. Also check related Service
Bulletins for information.

SEF233G

BRC

H
SEF234G

Revision: February 2006

BRC-159

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
WORK FLOW

WFIA0337E

Revision: February 2006

BRC-160

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
CLARIFY CONCERN
●

●

SBR339B

EXAMPLE OF DIAGNOSIS SHEET
E

BRC

WFIA0097E

Revision: February 2006

BRC-161

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]

Component Parts and Harness Connector Location

EFS005JF

WFIA0402E

Revision: February 2006

BRC-162

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]

Schematic

EFS005JG

BRC

WFWA0247E

Revision: February 2006

BRC-163

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]

Wiring Diagram — VDC —

EFS005JH

WFWA0248E

Revision: February 2006

BRC-164

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
A

BRC

WFWA0249E

Revision: February 2006

BRC-165

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]

WFWA0250E

Revision: February 2006

BRC-166

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
A

BRC

WFWA0251E

Revision: February 2006

BRC-167

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]

WFWA0252E

Revision: February 2006

BRC-168

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
A

BRC

WFWA0253E

Revision: February 2006

BRC-169

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]

WFWA0254E

Revision: February 2006

BRC-170

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]

Basic Inspection

EFS005JI

BRAKE FLUID LEVEL, FLUID LEAK, AND BRAKE PAD INSPECTION
1.
2.

ABS WARNING LAMP, SLIP INDICATOR LAMP, VDC OFF INDICATOR LAMP AND HDC INDICATOR LAMP INSPECTION
1.

4.
5.

Make sure ABS warning lamp, SLIP indicator lamp, VDC OFF indicator lamp (when VDC OFF switch is
off) and HDC indicator lamp (when HDC switch is off), turn on for approximately 2 seconds when the ignition switch is turned ON. If they do not, check the ABS warning lamp, SLIP indicator lamp, VDC OFF indicator lamp and HDC indicator lamp. Check CAN communications. If there are no errors with the CAN
communication system, check combination meter. Refer to DI-4, "COMBINATION METERS" .
Make sure the lamps turn off approximately 2 seconds after the ignition switch is turned ON. If the lamp
does not turn off, conduct self-diagnosis.
NOTE:
● On 4WD vehicles, when the transfer case is placed in 4LO, the VDC system is disabled and the VDC
OFF indicator will turn on.
● If the battery has been disconnected, the TCS/VDC system is initialized and the SLIP and VDC OFF
indicator lamps may not turn off after 2 seconds when the ignition switch is turned ON. In this case,
refer to BRC-178, "SELF-DIAGNOSIS" .
With the engine running, make sure the VDC OFF indicator lamp turns on and off when the VDC OFF
switch is turned on and off. If the indicator lamp status does not correspond to switch operation, check the
VDC OFF switch. Refer to BRC-204, "VDC OFF SWITCH" .
Turn HDC switch on to confirm that HDC indicator lamp turns on. If HDC indicator lamp does not turn on,
perform self-diagnosis. Refer to BRC-178, "SELF-DIAGNOSIS" .
Make sure ABS warning lamp, SLIP indicator lamp, VDC OFF indicator lamp and HDC indicator lamp turn
off approximately 2 seconds after the ignition switch is turned ON. If ABS warning lamp, SLIP indicator
lamp, VDC OFF indicator lamp and HDC indicator lamp have not turned off 2 seconds after the ignition
switch is turned ON, conduct self-diagnosis of the ABS actuator and electric unit (control unit).
After conducting the self-diagnosis, be sure to erase the error memory. Refer to BRC-177, "CONSULT-II
Function (ABS)" .

Revision: February 2006

BRC-171

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]

For Fast and Accurate Diagnosis

EFS005JJ

PRECAUTIONS FOR DIAGNOSIS
●
●

●
●

●
●
●
●
●
●

Before performing diagnosis, always read precautions. Refer to BRC-150, "PRECAUTIONS" .
If ABS actuator and electric unit (control unit), steering angle sensor, steering system parts or suspension
system parts have been replaced, or if alignment has been adjusted, be sure to adjust neutral position of
steering angle sensor before driving. Refer to BRC-212, "Adjustment of Steering Angle Sensor Neutral
Position" .
After diagnosis is finished, be sure to erase memory. Refer to BRC-178, "SELF-DIAGNOSIS" .
When checking continuity and voltage between units, be sure to check for disconnection, looseness,
bend, or collapse of connector terminals. If any non-standard condition is found, repair or replace connector terminals.
For intermittent symptoms, possible cause is malfunction in harness, harness connector, or terminals.
Move harness, harness connector, and terminals to check for poor connections.
If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.
To use CONSULT-II to perform self-diagnosis of ABS actuator and electric unit (control unit), active tests,
or work support, first stop work, then connect CONSULT-II and select “ABS”.
CONSULT-II self-diagnosis results are displayed without regard to occurrence timing. In some cases later
ones (timing value is small) appear on the next screen.
When self-diagnostic results of CONSULT-II show a malfunction, if CONSULT-II active test is performed,
an engine system error may be indicated. In this case, start engine to resume the normal screen.
VDC/TCS/ABS system electronically controls brake operation and engine output. The following symptoms
may be caused by normal operations:
Symptom

Symptom description

Result

This is noise of motor inside ABS actuator and electric unit (control unit).
Slight noise may occur during VDC, TCS, and ABS operation.
Motor operation noise

System operation check
noise

When the engine starts, slight “click” noise may be heard from engine
compartment. This is normal and is part of system operation check.

Normal

TCS may activate momentarily if wheel speed changes when driving
over location where friction coefficient varies, when up/downshifting or
when fully depressing accelerator pedal.

VDC/TCS operation
(SLIP indicator lamp blinking)

Normal
Cancel the VDC/TCS
function for the
inspection on a chassis dynamometer.

ABS operation (Longer stopping distance)

Normal

Insufficient feeling of acceleration

Normal

Revision: February 2006

BRC-172

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]

Warning Lamp and Indicator Timing

EFS005JK

A
ABS
warning
lamp

VDC OFF
indicator
lamp

SLIP
indicator
lamp

HDC indicator lamp

Remarks

When the ignition switch is OFF

—

After the ignition switch is turned
ON for approx. 1 second

—

After the ignition switch has been
turned ON for approx. 2 seconds

—

When the VDC OFF switch is
pressed (VDC function OFF)

—

ABS/TCS/VDC malfunction

—

When the VDC is malfunctioning

—

When HDC switch is pressed (HDC
function ON)

—

4H/4L → ON, 2H → Blink

Condition

X: ON
—: OFF

BRC

Control Unit Input/Output Signal Standard

EFS005JL

REFERENCE VALUE FROM CONSULT-II

CAUTION:
The display shows the control unit calculation data, so a normal value might be displayed even in the
event the output circuit (harness) is open or short circuited.

Data monitor
Monitor item

Display content
Condition

N POSI SIG

P POSI SIG

GEAR

PNP switch signal ON/
OFF condition

A/T gear position

FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSOR

Wheel speed

ACCEL POS SIG

Open/close condition
of throttle valve (linked
with accelerator pedal).

2WD/4WD

Drive axle

Revision: February 2006

Reference value in
normal operation

Note: Error inspection
checklist

A/T shift position = N position

A/T shift position = other than
N positions

OFF

A/T shift position P position

A/T shift position = other than
P positions

OFF

1st gear

2nd gear

3rd gear

4th gear

5th gear

Vehicle stopped

0 [km/h (MPH)]

Vehicle running (Note 1)

Almost in accordance with speedometer display
(within ±10%)

BRC-187, "Wheel Sensor System Inspection"

Accelerator pedal not
depressed (ignition switch is
ON)

Depress accelerator pedal
(ignition switch is ON)

BRC-202, "CAN Communication System Inspection"

0 to 100%

2WD model

2WD

4WD model

4WD

BRC-173

BRC-202, "CAN Communication System Inspection"

L
—

—

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
Data monitor
Monitor item

Display content

ENGINE SPEED

With engine running

STR ANGLE SIG

Steering angle
detected by steering
angle sensor

YAW RATE SEN

Yaw rate detected by
yaw rate sensor

SIDE G SENSOR

Transverse G detected
by side G-sensor

BATTERY VOLT

Battery voltage supplied to ABS actuator
and electric unit (control unit)

STOP LAMP SW

Stop lamp switch operation

OFF SW

HDC SW

VDC OFF switch
ON/OFF status

HDC switch ON/OFF
status

STOP LAMP ON RLY

Stop lamp relay operation status

ABS WARN LAMP

ABS warning lamp ON
condition (Note 2)

MOTOR RELAY

Operation status of
motor and motor relay

ACTUATOR RLY

OFF LAMP

SLIP LAMP

Actuator relay operation status

VDC OFF indicator
lamp status (Note 3)

SLIP indicator lamp
status (Note 4)

Revision: February 2006

Condition

Reference value in
normal operation

With engine stopped

0 RPM

Engine running

Almost in accordance with
tachometer display

Straight-ahead

Approx. 0 deg

Steering wheel turned

–756 to 756 deg

Vehicle stopped

Approx. 0 d/s

Vehicle running

–100 to 100 d/s

Vehicle stopped

Approx. 0 m/s2

Vehicle running

–16.7 to 16.7 m/s2

Ignition switch ON

10 to 16V

Brake pedal depressed

Brake pedal not depressed

OFF

VDC OFF switch ON
(When VDC OFF indicator
lamp is ON)

VDC OFF switch OFF
(When VDC OFF indicator
lamp is OFF)

OFF

HDC switch ON
(When HDC indicator lamp is
ON or blink)

HDC switch OFF
(When HDC indicator lamp is
OFF)

OFF

When HDC is operating

When HDC is not operating

OFF

ABS warning lamp ON

ABS warning lamp OFF

OFF

Ignition switch ON or running
(ABS not activated)

OFF

Ignition switch ON or engine
running (ABS activated)

Vehicle stopped (Ignition
switch ON)

OFF

Vehicle stopped (Engine running)

When VDC OFF indicator
lamp is ON

When VDC OFF indicator
lamp is OFF

OFF

When SLIP indicator lamp is
ON

When SLIP indicator lamp is
OFF

OFF

BRC-174

Note: Error inspection
checklist

BRC-188, "Engine System Inspection"

BRC-189, "Steering
Angle Sensor System"
BRC-191, "Yaw Rate/
Side/Decel G Sensor
System Inspection"
BRC-191, "Yaw Rate/
Side/Decel G Sensor
System Inspection"
BRC-196, "ABS/TCS/
VDC Control Unit Power
and Ground Systems
Inspection"
BRC-195, "Stop Lamp
Switch System Inspection"

BRC-204, "VDC OFF
SWITCH"

BRC-210, "HDC Switch
Inspection"

BRC-210, "Stop Lamp
Relay Inspection"
—

BRC-194, "Actuator
Motor, Motor Relay, and
Circuit Inspection"

BRC-202, "CAN Communication System Inspection"

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
Data monitor
Monitor item
FR LH IN SOL
FR LH OUT SOL
FR RH IN SOL
FR RH OUT SOL
RR RH IN SOL
RR RH OUT SOL
RR LH IN SOL
RR LH OUT SOL

CV1
CV2
SV1
SV2

DECEL G-SEN

PRESS SENSOR

PRESS SEN 2

FLUID LEV SW

VDC SIGNAL
TCS SIGNAL
ABS SIGNAL
EBD SIGNAL
HDC SIGNAL
HSA SIGNAL

VDC FAIL SIG
TCS FAIL SIG
ABS FAIL SIG
EBD FAIL SIG

Display content

Solenoid valve operation

VDC switch-over valve
status

Longitudinal acceleration detected by Decel
G-Sensor
Brake fluid pressure
detected by pressure
sensor

Brake fluid pressure
detected by pressure
sensor

ON/OFF status of
brake fluid level switch

Signal status

Fail signal status

Condition

Reference value in
normal operation

Actuator (solenoid) is active
(“ACTIVE TEST” with CONSULT-II) or actuator relay is
inactive (in fail-safe mode).

When actuator (solenoid) is
not active and actuator relay is
active (ignition switch ON).

OFF

Note: Error inspection
checklist

C
BRC-193, "Solenoid and
VDC Change-Over Valve
System Inspection"

When actuator (switch-over
valve) is active (“ACTIVE
TEST” with CONSULT-II) or
actuator relay is inactive (when
in fail-safe mode).

When actuator (switch-over
valve) is not active and actuator relay is active (ignition
switch ON).

OFF

Vehicle stopped

Approx. 0 G

Vehicle running

-1.7 to 1.7 G

Do not step on the Brake pedal
(When ignition switch is ON)

Approx. 0 bar

Step on the Brake pedal
(When ignition switch is ON)

-40 to 300 bar

Do not step on the Brake pedal
(When ignition switch is ON)

Approx. 0 bar

Step on the Brake pedal
(When ignition switch is ON)

-40 to 300 bar

When brake fluid level switch
ON

When brake fluid level switch
OFF

OFF

VDC active
TCS active
ABS active
EBD active
HDC active
HSA active

VDC not active
TCS not active
ABS not active
EBD not active
HDC not active
HSA not active

OFF

VDC fail
TCS fail
ABS fail
EBD fail

VDC normal
TCS normal
ABS normal
EBD normal

OFF

BRC-175

BRC
BRC-191, "Yaw Rate/
Side/Decel G Sensor
System Inspection"

—

I
—

J
DI-28, "WARNING
LAMPS"

L
VDC system
TCS system
ABS system
EBD system
HDC system
HSA system

VDC system
TCS system
ABS system
EBD system

Note 1: Confirm tire pressure is normal.
Note 2: ON/OFF timing of ABS warning lamp
ON: For approximately 2 seconds after ignition switch is turned ON, or when a malfunction is detected.

Revision: February 2006

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
OFF: Approximately 2 seconds after ignition switch is turned ON (when system is in normal operation) and VDC/TCS function is not
activated.
Note 3: ON/OFF timing of VDC OFF indicator lamp
ON: For approximately 2 seconds after ignition switch is turned ON, or when a malfunction is detected and VDC OFF switch is ON.
OFF: Approximately 2 seconds after ignition switch is turned ON (when system is in normal operation.) And when VDC OFF switch is
OFF.
Note 4: SLIP indicator lamp ON/OFF timing
ON: For approximately 2 seconds after ignition switch is turned ON, or when a malfunction is detected and VDC/TCS function is activated while driving.
OFF: Approximately 2 seconds after ignition switch is turned ON (when system is in normal operation) and VDC/TCS function is not
activated.
Flashing: VDC/TCS function is active during driving.

Revision: February 2006

BRC-176

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]

CONSULT-II Function (ABS)

EFS005JM

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
ABS diagnostic mode
WORK SUPPORT
SELF-DIAG RESULTS
DATA MONITOR

Displays ABS actuator and electric unit (control unit) self-diagnosis results.

Displays ABS actuator and electric unit (control unit) input/output data in real time.

CAN DIAG SUPPORT MNTR

The result of transmit/receive diagnosis of CAN communication can be read.

ACTIVE TEST

Operation of electrical loads can be checked by sending drive signal to them.

FUNCTION TEST
ECU PART NUMBER

Conducted by CONSULT-II instead of a technician to determine whether each system is "OK" or
"NG".

ABS actuator and electric unit (control unit) part number can be read.

CONSULT-II BASIC OPERATION PROCEDURE
1.
2.

BRC

I
BBIA0538E

Touch “START (NISSAN BASED VHCL)”.

M
BCIA0029E

Touch “ABS” in the “SELECT SYSTEM” screen.
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link
Connector (DLC) Circuit" .

BCIA0030E

Select the required diagnostic location from the “SELECT DIAG MODE” screen.
For further information, see the CONSULT-II Operation Manual.

Revision: February 2006

BRC-177

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
SELF-DIAGNOSIS
Description
If an error is detected in the system, the ABS warning lamp will turn on. In this case, perform self-diagnosis as
follows:

Operation Procedure
1.
2.

Turn ignition switch OFF.
Connect CONSULT-II and CONSULT-II CONVERTER to the data link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.

3.
4.
5.

Turn ignition switch ON.
Start engine and drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
After stopping the vehicle, with the engine running, touch “START (NISSAN BASED VHCL)”, “ABS”,
“SELF-DIAG RESULTS” in order on the CONSULT-II screen.
CAUTION:
If “START (NISSAN BASED VHCL)” is touched immediately after starting the engine or turning on
the ignition switch, “ABS” might not be displayed in the SELECT SYSTEM screen. In this case,
repeat the operation from step 1.
6. The self-diagnostic results are displayed. (If necessary, the self-diagnostic results can be printed out by
touching “PRINT”.)
● When “NO DTC IS DETECTED” is displayed, check the ABS warning lamp, SLIP indicator lamp and
VDC OFF indicator lamp.
7. Conduct the appropriate inspection from the display item list, and repair or replace the malfunctioning
component.
8. Start engine and drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
CAUTION:
● When a wheel sensor “short-circuit” is detected, if the vehicle is not driven at 30 km/h (19 MPH)
for at least 1 minute, the ABS warning lamp will not turn off even if the malfunction is repaired.
9. Turn ignition switch OFF to prepare for erasing the memory.
10. Start the engine and touch “START (NISSAN BASED VHCL)”, “ABS”, “SELF-DIAG RESULTS”, “ERASE”
in order on the CONSULT-II screen to erase the error memory.
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link Connector (DLC) Circuit" .
CAUTION:
If the error memory is not erased, re-conduct the operation from step 5.
11. For the final inspection, drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute and
confirm that the ABS warning lamp, SLIP indicator lamp, and VDC OFF indicator lamp are off.

Revision: February 2006

BRC-178

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
Display Item List
Self-diagnostic item

Malfunction detecting condition

Check system

RR RH SENSOR 1
[C1101]

Circuit of rear RH wheel sensor is open, shorted or sensor power
voltage is unusual.

RR LH SENSOR 1
[C1102]

Circuit of rear LH wheel sensor is open, shorted or sensor power
voltage is unusual.

FR RH SENSOR 1
[C1103]

Circuit of front RH wheel sensor is open, shorted or sensor power
voltage is unusual.

FR LH SENSOR 1
[C1104]

Circuit of front LH wheel sensor is open, shorted or sensor power
voltage is unusual.

RR RH SENSOR 2
[C1105]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

RR LH SENSOR 2
[C1106]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

FR RH SENSOR 2
[C1107]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

BRC

FR LH SENSOR 2
[C1108]

ABS actuator and electric unit (control unit) cannot identify sensor pulses, because of large gap between wheel sensor and sensor rotor.

ABS SENSOR
[C1115]

Wheel sensor input is abnormal.

BATTERY VOLTAGE
[ABNORMAL]
[C1109]

ABS actuator and electric unit (control unit) power voltage is too
low.

BRC-196, "ABS/TCS/
VDC Control Unit Power
and Ground Systems
Inspection"

CONTROLLER FAILURE
[C1110]

Internal malfunction of ABS actuator and electric unit (control
unit)

BRC-189, "ABS/TCS/
VDC Control Unit
Inspection"

BRC-194, "Actuator
Motor, Motor Relay, and
Circuit Inspection"

PUMP MOTOR (Note 3)
[C1111]

D
BRC-187, "Wheel Sensor System Inspection"
(Note 1)

G-SENSOR
[C1113]

Longitudinal G-sensor is malfunctioning, or signal line of longitudinal G-sensor is open or shorted.

BRC-191, "Yaw Rate/
Side/Decel G Sensor
System Inspection"

STOP LAMP SW
[C1116]

Stop lamp switch or circuit malfunction.

BRC-195, "Stop Lamp
Switch System Inspection"

Revision: February 2006

BRC-179

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
Self-diagnostic item

Malfunction detecting condition

Check system

FR LH IN ABS SOL
[C1120]

Circuit of front LH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

FR LH OUT ABS SOL
[C1121]

Circuit of front LH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

FR RH IN ABS SOL
[C1122]

Circuit of front RH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

FR RH OUT ABS SOL
[C1123]

Circuit of front RH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

RR LH IN ABS SOL
[C1124]

Circuit of rear LH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

RR LH OUT ABS SOL
[C1125]

Circuit of rear LH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

RR RH IN ABS SOL
[C1126]

Circuit of rear RH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.

RR RH OUT ABS SOL
[C1127]

Circuit of rear RH OUT ABS solenoid is open or shorted, or control line is open or shorted to power supply or ground.

ENGINE SIGNAL 1
[C1130]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ENGINE SIGNAL 2
[C1131]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ENGINE SIGNAL 3
[C1132]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ENGINE SIGNAL 4
[C1133]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ENGINE SIGNAL 6
[C1136]

Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunctioning.

ACTUATOR RLY
[C1140]

ABS actuator relay or circuit malfunction.

BRC-194, "Actuator
Motor, Motor Relay, and
Circuit Inspection"

PRESS SEN CIRCUIT
[C1142]

ABS pressure sensor circuit malfunction.

BRC-199, "Pressure
Sensor System Inspection"

ST ANGLE SEN CIRCUIT
[C1143]

Neutral position of steering angle sensor is dislocated, or steering angle sensor is malfunctioning.

BRC-189, "Steering
Angle Sensor System"

ST ANGLE SEN SIGNAL
[C1144]

Neutral position correction of steering angle sensor is not finished.

BRC-203, "Inspection
For Self-diagnosis
Result "ST ANGLE SEN
SIGNAL""

YAW RATE SENSOR
[C1145]

Yaw rate sensor has generated an error, or yaw rate sensor signal line is open or shorted.

SIDE G-SEN CIRCUIT
[C1146]

Lateral G-sensor is malfunctioning, or signal line of lateral G-sensor is open or shorted.

BR FLUID LEVEL LOW
[C1155]

Brake fluid level drops or circuit between ABS actuator and electric unit (control unit) and brake fluid level switch is open or
shorted.

BRC-197, "Brake Fluid
Level Sensor System
Inspection"

ST ANG SEN COM CIR
[C1156]

CAN communication line or steering angle sensor has generated
an error.

BRC-189, "Steering
Angle Sensor System"

Revision: February 2006

BRC-180

BRC-193, "Solenoid and
VDC Change-Over Valve
System Inspection"

BRC-188, "Engine System Inspection"

BRC-191, "Yaw Rate/
Side/Decel G Sensor
System Inspection"

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
Self-diagnostic item
DECEL G SEN SET
[C1160]

Malfunction detecting condition

ABS decel sensor adjustment is incomplete.

Check system
BRC-203, "Inspection
For Self-diagnosis
Result "DECEL G SEN
SET""
BRC-202, "Steering
Angle Sensor Safe Mode
Inspection"

When steering angle sensor is in safe mode.

CV1
[C1164]

Front side VDC switch-over solenoid valve (cut valve) is open or
shorted, or control line is open or shorted to power supply or
ground.

CV2
[C1165]

Rear side VDC switch-over solenoid valve (cut valve) is open or
shorted, or control line is open or shorted to power supply or
ground.

SV1
[C1166]

Front side VDC switch-over solenoid valve (suction valve) is
open or shorted, or control line is open or shorted to power supply or ground.

SV2
[C1167]

Rear side VDC switch-over solenoid valve (suction valve) is open
or shorted, or control line is open or shorted to power supply or
ground.

VARIANT CODING
[C1170]

V coding is not malfunctioning.

ABS ACTIVE BOOSTER SV NG
[C1178]

Active booster solenoid is malfunctioning, or signal line of active
booster servo is open or shorted.

ABS ACTIVE BOOSTER
RESPONSE NG
[C1181]

Active booster response is malfunctioning, or signal line of active
booster response is open or shorted.

ABS BRAKE RELEASE SW NG
[C1184]

Brake release switch is malfunctioning, or signal line of brake
release switch is open or shorted.

ABS DIFLOCK CONTROLLER
NG
[C1187]

BRC-202, "CAN Communication System
Inspection"

Differential lock controller malfunction.

ABS BRAKE BOOSTER DEFECT
[C1189]

BRC-198, "Active
Booster System Inspection"

Brake booster is defective or malfunctioning.
●

CAN communication line is open or shorted.

●

ABS actuator and electric unit (control unit) internal malfunction

●

Battery voltage for ECM is suddenly interrupted for approximately 0.5 second or more.

BRC-193, "Solenoid and
VDC Change-Over Valve
System Inspection"

BRC-189, "ABS/TCS/
VDC Control Unit
Inspection"

H
BRC-198, "Active
Booster System Inspection"

L
BRC-202, "CAN Communication System
Inspection" (Note 2)

BRC-181

BRC

DATA MONITOR
Operation Procedure

Revision: February 2006

Note 1. If wheel sensor 2 for each wheel is indicated, check ABS actuator and electric unit (control unit) power
supply voltage in addition to wheel sensor circuit check.
Note 2. If multiple malfunctions are detected including CAN communication line [U1000], perform diagnosis for
CAN communication line first.
Note 3. "ACTUATOR RLY" on the CONSULT-II self-diagnosis results indicates the malfunction of the actuator
motor relay or circuit.

ST ANGL SEN SAFE
[C1163]

CAN COMM CIRCUIT
[U1000]

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]

3.
4.

CAUTION:
When “START (NISSAN BASED VHCL)” is touched immediately after starting the engine or turning
on the ignition switch, “ABS” might not be displayed in the SELECT SYSTEM screen. In this case,
repeat the operation from step 2.
Return to the Monitor Item Selection screen, and touch “ECU INPUT SIGNALS”, “MAIN SIGNALS”, or
“SELECTION FROM MENU”. Refer to the following information.
When “START” is touched, the data monitor screen is displayed.

Display Item List
Data monitor item selection
Item
(Unit)

Remarks

ECU INPUT
SIGNALS

MAIN
SIGNALS

SELECTION
FROM MENU

GEAR

Gear position judged by PNP
switch signal is displayed.

FR RH SENSOR
(km/h, MPH)

Wheel speed calculated by front
RH wheel sensor signal is displayed.

FR LH SENSOR
(km/h, MPH)

Wheel speed calculated by front LH
wheel sensor signal is displayed.

RR RH SENSOR
(km/h, MPH)

Wheel speed calculated by rear RH
wheel sensor signal is displayed.

RR LH SENSOR
(km/h, MPH)

Wheel speed calculated by rear LH
wheel sensor signal is displayed.

BATTERY VOLT
(V)

Voltage supplied to ABS actuator
and electric unit (control unit) is displayed.

N POSI SIG

–

Shift position judged by PNP switch
signal.

P POSI SIG

–

Shift position judged by PNP switch
signal.

ACCEL POS SIG
(%)

–

Throttle valve open/close status
judged by CAN communication signal is displayed.

ENGINE SPEED
(rpm)

Engine speed judged by CAN communication signal is displayed.

STR ANGLE SIG
(deg)

–

Steering angle detected by steering
angle sensor is displayed.

YAW RATE SEN
(d/s)

Yaw rate detected by yaw rate sensor is displayed.

DECEL G SEN
(d/s)

Longitudinal acceleration detected
by decel G-sensor is displayed.

–

Transverse acceleration detected
by side G-sensor is displayed.

STOP LAMP SW
(ON/OFF)

Stop lamp switch (ON/OFF) status
is displayed.

OFF SW
(ON/OFF)

VDC OFF switch (ON/OFF) status
is displayed.

HDC SW
(ON/OFF)

–

HDC switch (ON/OFF) status is
displayed.

ABS WARN LAMP
(ON/OFF)

–

ABS warning lamp (ON/OFF) status
is displayed.

SLIP LAMP
(ON/OFF)

–

SLIP indicator lamp (ON/OFF) status is displayed.

FR LH IN SOL
(ON/OFF)

–

Front LH IN ABS solenoid (ON/
OFF) status is displayed.

SIDE G-SENSOR
(m/s2 )

Revision: February 2006

BRC-182

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
Item
(Unit)

Data monitor item selection

Remarks

ECU INPUT
SIGNALS

MAIN
SIGNALS

SELECTION
FROM MENU

FR LH OUT SOL
(ON/OFF)

–

Front LH OUT ABS solenoid (ON/
OFF) status is displayed.

RR RH IN SOL
(ON/OFF)

–

Rear RH IN ABS solenoid (ON/
OFF) status is displayed.

RR RH OUT SOL
(ON/OFF)

–

Rear RH OUT ABS solenoid (ON/
OFF) status is displayed.

FR RH IN SOL
(ON/OFF)

–

Front RH IN ABS solenoid (ON/
OFF) status is displayed.

FR RH OUT SOL
(ON/OFF)

–

Front RH OUT ABS solenoid (ON/
OFF) status is displayed.

RR LH IN SOL
(ON/OFF)

–

Rear LH IN ABS solenoid (ON/
OFF) status is displayed.

RR LH OUT SOL
(ON/OFF)

–

Rear LH OUT ABS solenoid (ON/
OFF) status is displayed.

OFF LAMP
(ON/OFF)

–

OFF Lamp (ON/OFF) status is displayed.

MOTOR RELAY
(ON/OFF)

–

ABS motor relay signal (ON/OFF)
status is displayed.

ACTUATOR RLY
(ON/OFF)

–

ABS actuator relay signal (ON/
OFF) status is displayed.

Front side switch-over solenoid
valve (cut valve) (ON/OFF) status is
displayed.

Rear side switch-over solenoid
valve (cut-valve) (ON/OFF) status
is displayed.

CV1
(ON/OFF)
CV2
(ON/OFF)

–

SV1
(ON/OFF)

–

Front side switch-over solenoid
valve (suction valve) (ON/OFF) status is displayed.

SV2
(ON/OFF)

–

Rear side switch-over solenoid
valve (suction valve) (ON/OFF) status is displayed.

VDC FAIL SIG
(ON/OFF)

–

VDC fail signal (ON/OFF) status is
displayed.

TCS FAIL SIG
(ON/OFF)

–

TCS fail signal (ON/OFF) status is
displayed.

ABS FAIL SIG
(ON/OFF)

–

ABS fail signal (ON/OFF) status is
displayed.

EBD FAIL SIG
(ON/OFF)

–

EBD fail signal (ON/OFF) status is
displayed.

FLUID LEV SW
(ON/OFF)

–

Brake fluid level switch (ON/OFF)
status is displayed.

EBD SIGNAL
(ON/OFF)

–

EBD operation (ON/OFF) status is
displayed.

ABS SIGNAL
(ON/OFF)

–

ABS operation (ON/OFF) status is
displayed.

TCS SIGNAL
(ON/OFF)

–

TCS operation (ON/OFF) status is
displayed.

VDC SIGNAL
(ON/OFF)

–

VDC operation (ON/OFF) status is
displayed.

HDC SIGNAL
(ON/OFF)

–

HDC operation (ON/OFF) status is
displayed.

Revision: February 2006

BRC-183

2005 Xterra

BRC

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
Item
(Unit)

Data monitor item selection
Remarks

ECU INPUT
SIGNALS

MAIN
SIGNALS

SELECTION
FROM MENU

HSA SIGNAL
(ON/OFF)

–

HSA operation (ON/OFF) status is
displayed.

STP LAMP ON RLY

–

Stop lamp relay signal status is displayed

EBD WARN LAMP

–

Brake warning lamp (ON/OFF) status is displayed.

SLCT LVR POSI

Shift position judged by PNP switch
signal.

R POSI SIG

–

Shift position judged by PNP switch
signal.

2WD/4WD

–

It recognizes on software whether it
is 2WD and whether it is in 4WD
state.

PRESS SENSOR

–

Brake pressure detected by pressure sensor is displayed.

PRESS SEN 2

–

Brake pressure detected by pressure sensor is displayed.

CRANKING SIG

–

The input state of the key SW
START position signal is displayed.

×: Applicable
–: Not applicable

ACTIVE TEST
CAUTION:
●
Do not perform active test while driving.
●
Make sure to completely bleed air from the brake system.
●
The ABS and brake warning lamps turn on during the active test.

Operation Procedure
1.

2.
3.
4.
5.
6.

Connect the CONSULT-II and CONSULT-II CONVERTER to the data link connector and start the engine.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
Touch “START (NISSAN BASED VHCL) ” on the display screen.
Touch “ABS”.
If “ABS” is not indicated, go to GI-39, "CONSULT-II Data Link Connector (DLC) Circuit" .
Touch “ACTIVE TEST”.
The test item selection screen is displayed.
Touch necessary test item.

WFIA0349E

7.
8.

With the “MAIN SIGNALS” display selected, touch “START”.
The Active Test screen will be displayed, so conduct the following test.

Revision: February 2006

BRC-184

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
Solenoid Valve Operation Chart
ABS solenoid valve
Operation

ABS solenoid valve (ACT)

KEEP

DOWN

ACTUATOR
UP

ACTUATOR
KEEP

FR RH IN SOL

OFF

FR RH OUT SOL

OFF

ON*

OFF

FR LH IN SOL

OFF

FR LH OUT SOL

OFF

ON*

OFF

RR RH IN SOL

OFF

RR RH OUT SOL

OFF

ON*

OFF

RR LH IN SOL

OFF

RR LH OUT SOL

OFF

ON*

OFF

Primary side VDC switch over
valve 1 (SV 1)

OFF

ON*

OFF

Primary side VDC switch over
valve 1 (CV 1)

OFF

Primary side VDC switch over
valve 2 (SV 1)

OFF

ON*

OFF

Primary side VDC switch over
valve 2 (CV 1)

OFF

BRC

ABS MOTOR

Touch “ON” and “OFF” on the screen. Check that ABS motor relay
operates as shown in table below.
ON

OFF

MOTOR RELAY

OFF

ACTUATOR RELAY

NOTE:
●
If active test is performed with brake pedal depressed, pedal
stroke may change. This is normal.
●
“TEST IS STOPPED” is displayed approximately 10 seconds
after operation starts.

M
SFIA0593E

BOOSTER DRIVE
CAUTION:
Perform active test subject to the conditions below.
●
Do not operate brake pedal during active test.
●
Make sure the engine revolution is over 500 rpm.
●
Make sure the vehicle is not moving.

Revision: February 2006

*: ON for 1 to 2 seconds after the touch, and then OFF

Operation

BRC-185

2005 Xterra

TROUBLE DIAGNOSIS
[HDC/HSA/VDC/TCS/ABS]
Touch "UP" and "DOWN" on the screen. Check that booster drive
operates as shown in table below.
Operation

DOWN

STOP LAMP SW

OFF

BST OPER SIG

OFF

PRESS SENSOR

50 ± 5 bar

0 bar

PRESS SEN 2

50 ± 5 bar

0 bar

STP OFF RLY

OFF

NOTE:
"TEST IS STOPPED" is displayed approximately 10 seconds after operation starts.

Revision: February 2006

BRC-186

WFIA0350E

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Wheel Sensor System Inspection

PFP:00000

A
EFS005JN

INSPECTION PROCEDURE

1. CHECK TIRES

Check for inflation pressure, wear and size of each tire.
Are tire pressure and size correct and is tire wear within specifications?
YES >> GO TO 2.
NO
>> Adjust tire pressure or replace tire(s).

2. CONNECTOR INSPECTION

3. CHECK SENSOR AND SENSOR ROTOR

4. CHECK WHEEL SENSOR OUTPUT SIGNAL

1.
2.

Connect ABS active wheel sensor tester (J-45741) to wheel sensor using appropriate adapter.
Turn on the ABS active wheel sensor tester power switch.
NOTE:
The green POWER indicator should illuminate. If the POWER indicator does not illuminate, replace the
battery in the ABS active wheel sensor tester before proceeding.
3. Spin the wheel of the vehicle by hand and observe the red SENSOR indicator on the ABS active wheel
sensor tester. The red SENSOR indicator should flash on and off to indicate an output signal.
NOTE:
If the red SENSOR indicator illuminates but does not flash, reverse the polarity of the tester leads and
retest.
Does the ABS active wheel sensor tester detect a signal?
YES >> GO TO 5.
NO
>> Replace the wheel sensor. Refer to BRC-214, "Removal and Installation" .

Revision: February 2006

BRC-187

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

5. CHECK WIRING HARNESS FOR SHORT CIRCUIT
1.
2.

OK or NG
OK
>> GO TO 6.
NG
>> Repair the circuit.
WFIA0343E

Wheel sensor

Connector

Terminal

Wheel sensor
Connector

45
Front LH

33
E125

Rear LH

2
2

C11

42
Rear RH

2
1

E117

37
36

Terminal
1

E18

34
Front RH

Continuity

Yes

1
2

C10

Continuity should exist.
OK or NG
OK
>> Replace the ABS actuator and electric unit (control unit). Refer to BRC-216, "Removal and Installation" .
NG
>> Repair the circuit.

Engine System Inspection

EFS005JO

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Self-diagnosis results
ENGINE SIGNAL 1
ENGINE SIGNAL 2
ENGINE SIGNAL 3
ENGINE SIGNAL 4
ENGINE SIGNAL 6

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

Revision: February 2006

BRC-188

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

2. ENGINE SYSTEM INSPECTION

ABS/TCS/VDC Control Unit Inspection

C
EFS005JP

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK

Check self-diagnosis results.
E

Self-diagnosis results
CONTROLLER FAILURE
VARIANT CODING

BRC

Is the above displayed in the self-diagnosis display items?
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-216, "Removal and Installation" .
NO
>> Inspection End.

Steering Angle Sensor System

EFS005JQ

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSIS RESULT
I

Check self-diagnosis results.
Self-diagnosis results

ST ANGLE SEN CIRCUIT
ST ANG SEN COM CIR

Is above displayed in self-diagnosis item?
YES >> GO TO 2.
NO
>> Inspection End.

2. CHECK CONNECTOR

1.
2.

Revision: February 2006

BRC-189

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

3.
1.
2.

CHECKING STEERING ANGLE SENSOR POWER AND GROUND
Turn ignition switch ON.
Check voltage between steering angle sensor harness connector M47 and body ground.
Terminals
Measured
value
(Approx.)

(+)
Steering angle sensor
connector

(-)

Terminal
1

M47

Ground

12V
12V
WFIA0398E

3.
4.

Turn ignition switch OFF.
Check resistance between steering angle sensor harness connector M47 and body ground.
Terminals
(-)

Measured
value Ω
(Approx.)

Ground

0Ω

(+)
Steering angle sensor
connector

Terminal

M47

WFIA0399E

OK or NG
OK
>> GO TO 4.
NG
>> Repair the circuit.

4. CHECK STEERING ANGLE SENSOR HARNESS
1.
2.
3.

Check CAN communication system. Refer to LAN-21, "CAN COMMUNICATION" .
Disconnect steering angle sensor connector M47 and ABS actuator and electric unit (control unit) connector E125.
Check continuity between ABS actuator and electric unit (control
unit) connector E125 and steering angle sensor connector M47.
A

B
Ter- Continuity
minal

Connector

Terminal

Connector

ABS actuator and
electric unit (control unit): E125

Steering angle
sensor: M47

Yes

ABS actuator and
electric unit (control unit): E125

Steering angle
sensor: M47

Yes

WFIA0400E

OK or NG
OK
>> GO TO 5.
NG
>> Repair or replace harness.

Revision: February 2006

BRC-190

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

5. CHECK STEERING WHEEL PLAY

Check steering wheel play. Refer to PS-8, "CHECKING STEERING WHEEL PLAY" .
OK or NG
OK
>> GO TO 6.
NG
>> Adjust steering wheel play.

6. CHECK DATA MONITOR
1.
2.

Connect steering angle sensor and ABS actuator and electric unit (control unit) connectors.
Use “DATA MONITOR” to check if the status of "STR ANGLE SIG" is normal.
Steering condition

Data monitor

Straight-ahead

–3.5 deg to +3.5 deg

Turn wheel to the right by 90°

Approx. - 90deg

Turn wheel to the left by 90°

Approx. + 90deg

OK or NG
BRC
OK
>> Perform ABS actuator and electric unit (control unit) self-diagnosis again.
NG
>> Replace spiral cable (steering angle sensor) and adjust neutral position of steering angle sensor.
Refer to BRC-212, "Adjustment of Steering Angle Sensor Neutral Position" .
G

Yaw Rate/Side/Decel G Sensor System Inspection

EFS005JR

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
J

Check self-diagnosis results.
Self-diagnosis results

YAW RATE SENSOR
SIDE G-SEN CIRCUIT
G-SENSOR

Revision: February 2006

BRC-191

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

3. YAW RATE/SIDE/DECEL G SENSOR HARNESS INSPECTION
1.
2.

Yaw rate/side/decel G sensor
harness connector B73

Continuity

Yes

OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace as necessary.

4. YAW RATE/SIDE/DECEL G SENSOR INSPECTION
1.
2.

Yaw rate sensor
(Data monitor standard)

Side G sensor
(Data monitor standard)

Decel G Sensor
(Data monitor standard)

When stopped

-4 to +4 deg/s

-1.1 to +1.1 m/s

-0.08 G to +0.08 G

Right turn

Negative value

Left turn

Positive value

Speed up

Negative value

Speed down

Positive value

OK or NG
OK
>> Inspection End.
NG
>> Replace the yaw rate/side/decel G sensor. Refer to BRC-219, "Removal and Installation" .

Revision: February 2006

BRC-192

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

Solenoid and VDC Change-Over Valve System Inspection

EFS005JS

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
B

Check self-diagnosis results.
Self-diagnosis results

FR LH IN ABS SOL
FR LH OUT ABS SOL
RR RH IN ABS SOL

RR RH OUT ABS SOL
FR RH IN ABS SOL

FR RH OUT ABS SOL
RR LH IN ABS SOL
RR LH OUT ABS SOL

BRC

CV 1
CV 2
SV 1

SV 2

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION

Revision: February 2006

BRC-193

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

3.
1.

Body
ground
—

Measured
value
(Approx.)
12V

WFIA0195E

Check resistance between ABS actuator and electric unit (control unit) harness connector E125 and body ground.
ABS actuator and electric
unit (control unit)
harness connector E125
16
47

Body
ground
—
—

Measured
value Ω
(Approx.)
0Ω
0Ω

OK or NG
OK
>> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-216, "Removal and Installation" .
NG
>> Repair the circuit.

Actuator Motor, Motor Relay, and Circuit Inspection

WFIA0196E

EFS005JT

INSPECTION PROCEDURE

1. CHECKING SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Self-diagnosis results
PUMP MOTOR
ACTUATOR RLY

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

Revision: February 2006

BRC-194

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

3.
1.

CHECKING ABS MOTOR AND MOTOR RELAY POWER SYSTEM

Check voltage between ABS actuator and electric unit (control
unit) harness connector E125 and body ground.
ABS actuator and electric
unit (control unit)
harness connector E125
1

Measured
value
(Approx.)
12V

Body
ground
—

D
WFIA0209E

Check resistance between ABS actuator and electric unit (control unit) connector E125 and body ground.
ABS actuator and electric
unit (control unit)
harness connector E125
16
47

Measured
value Ω
(Approx.)
0Ω
0Ω

Body
ground
—
—

Stop Lamp Switch System Inspection

BRC

WFIA0196E

I
EFS005JU

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.

K
Self-diagnosis results
STOP LAMP SW

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION
1.

Revision: February 2006

BRC-195

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

3. STOP LAMP SWITCH INSPECTION
Check the voltage between the ABS actuator and electric unit (control unit) harness connector E125 terminal 41 and body ground.
Brake pedal depressed

WFIA0198E

4. STOP LAMP RELAY CIRCUIT INSPECTION
1.
2.

Disconnect the stop lamp relay harness connector E12.
Check the continuity between the ABS actuator and electric unit
(control unit) harness connector E125 terminal 41 and stop lamp
relay harness connector E12 terminal 5.
Continuity should exist.

ABS/TCS/VDC Control Unit Power and Ground Systems Inspection

EFS005JV

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Self-diagnosis results
BATTERY VOLTAGE

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

Revision: February 2006

BRC-196

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

3. ABS/TCS/VDC CONTROL UNIT POWER AND GROUND CIRCUIT INSPECTION

Measure the voltage and continuity between the ABS actuator and electric unit (control unit) harness connector E125 and body ground.
Signal name

ABS actuator and electric unit
(control unit)
harness connector E125

Power supply
Ground

Body
ground

—

Measured value

Battery voltage (Approx. 12V)
D

—

Continuity should exist.
E

OK or NG
OK
>> Check the battery for loose terminals, low voltage, etc. Repair as necessary.
NG
>> Repair the circuit.

Brake Fluid Level Sensor System Inspection

BRC
EFS005JW

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK

1.
2.

Check the brake reservoir tank fluid level. If the level is low, add brake fluid.
Erase the self-diagnosis results and check the self-diagnosis results.
Self-diagnosis results
BR FLUID LEVEL LOW

Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION
1.

Revision: February 2006

BRC-197

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

3. CHECK THE HARNESS BETWEEN THE BRAKE FLUID LEVEL SENSOR AND THE ABS ACTUATOR
AND ELECTRIC UNIT (CONTROL UNIT)
Check the continuity between the brake fluid level switch harness connector E21 and the ABS actuator and
electric unit (control unit) harness connector E125.
ABS actuator and electric unit
(control unit) harness connector
E125

Brake fluid level switch harness
connector E21

Continuity

Yes

Ground

Yes

OK or NG
OK
>> Perform self-diagnosis again. If the same results appear, replace ABS actuator and electric unit
(control unit). Refer to BRC-216, "Removal and Installation" .
NG
>> Repair the circuit.

Active Booster System Inspection

EFS005JX

INSPECTION PROCEDURE

1. DISPLAY SELF DIAGNOSIS RESULTS
Check self-diagnosis result display item.
Self-diagnosis results
ABS ACTIVE BOOSTER SV NG
ABS ACTIVE BOOSTER RESPONSE NG
ABS BRAKE RELEASE SW NG
ABS BRAKE BOOSTER DEFECT

Is the self-diagnosis result display item shown above displayed?
YES >> GO TO 2.
NO
>> Inspection End.

2. CONNECTOR INSPECTION
1.
2.

Turn the ignition switch OFF.
Disconnect the active booster connector E49 and ABS actuator and electric unit (control unit) connector
E125 and inspect the terminals for deformation, disconnection, looseness, or damage.
OK or NG
OK
>> GO TO 3.
NG
>> Repair connector.

Revision: February 2006

BRC-198

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

3. ACTIVE BOOSTER CIRCUIT INSPECTION
1.

Measure the continuity between the ABS actuator and electric unit (control unit) harness connector E125
and active booster harness connector E49.
ABS actuator and electric unit (control unit) harness connector E125

Active booster harness connector E49

Continuity
C

Yes

Measure the continuity between the ABS actuator and electric unit (control unit) harness connector E125
and body ground.
ABS actuator and electric unit (control unit) harness connector E125

Body ground

BRC

Continuity

17
G

27
28

—

No
H

30
31
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness or connector.

4. ACTIVE BOOSTER SENSOR INSPECTION
1.
2.

Reconnect the active booster and ABS actuator and electric unit (control unit) connectors.
Use "DATA MONITOR" to check if the status of "RELEASE SW NO" and "RELEASE SW NC" is normal.
Condition
When brake pedal is depressed
When brake pedal is released

Data monitor display
RELEASE SW NO
RELEASE SW NC
ON
OFF
OFF
ON

OK or NG
OK
>> Inspection End.
NG
>> Replace active booster. Refer to BR-17, "Removal and Installation" .

Pressure Sensor System Inspection

EFS005JY

FRONT PRESSURE INSPECTION PROCEDURE

1. DISPLAY SELF DIAGNOSIS RESULTS
Check self-diagnosis result display item.
Self-diagnosis results
PRESS SEN CIRCUIT

Is the self-diagnosis result display item shown above displayed?
YES >> GO TO 2.
NO
>> Inspection End.

Revision: February 2006

BRC-199

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

2. CONNECTOR INSPECTION
1.
2.

3. FRONT PRESSURE SENSOR CIRCUIT INSPECTION
1.

Front pressure sensor harness
connector E31

Continuity

Yes

Measure the continuity between the ABS actuator and electric unit (control unit) harness connector E125
and body ground.
ABS actuator and electric unit (control
unit) harness connector E125

Body ground

Continuity

—

18
19
20
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness or connector.

4. FRONT PRESSURE SENSOR INSPECTION
1.
2.

Reconnect the front pressure sensor and ABS actuator and electric unit (control unit) connectors.
Use "DATA MONITOR" to check if the status of "PRESS SENSOR" is normal.
Data monitor display (Approx.)
PRESS SENSOR
Positive value
0 bar

Condition
When brake pedal is depressed
When brake pedal is released
OK or NG
OK
>> Inspection End.
NG
>> Replace front pressure sensor.

REAR PRESSURE INSPECTION PROCEDURE

1. DISPLAY SELF DIAGNOSIS RESULTS
Check self-diagnosis result display item.
Self-diagnosis results
PRESS SEN CIRCUIT

Is the self-diagnosis result display item shown above displayed?
YES >> GO TO 2.
NO
>> Inspection End.
Revision: February 2006

BRC-200

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

2. CONNECTOR INSPECTION

1.
2.

Turn the ignition switch OFF.
Disconnect the rear pressure sensor connector E32 and ABS actuator and electric unit (control unit) connector E125 and inspect the terminals for deformation, disconnection, looseness, or damage.
OK or NG
OK
>> GO TO 3.
NG
>> Repair connector.

3. REAR PRESSURE SENSOR CIRCUIT INSPECTION
1.

Measure the continuity between the ABS actuator and electric unit (control unit) harness connector E125
and rear pressure sensor harness connector E32.
ABS actuator and electric unit (control unit) harness connector E125

Rear pressure sensor harness
connector E32

Continuity

BRC

Yes

Measure the continuity between the ABS actuator and electric unit (control unit) harness connector E125
and body ground.
ABS actuator and electric unit (control unit) harness connector E125

Body ground

Continuity

—

21
22
23
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness or connector.

4. REAR PRESSURE SENSOR INSPECTION

1.
2.

Reconnect the rear pressure sensor and ABS actuator and electric unit (control unit) connectors.
Use "DATA MONITOR" to check if the status of "PRESS SEN 2" is normal.
Condition

Data monitor display (Approx.)
M

PRESS SEN 2

When brake pedal is depressed

Positive value

When brake pedal is released

0 bar

OK or NG
OK
>> Inspection End.
NG
>> Replace rear pressure sensor.

Revision: February 2006

BRC-201

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

Steering Angle Sensor Safe Mode Inspection

EFS005JZ

INSPECTION PROCEDURE

1. INDICATOR LAMP CHECK
Check that VDC OFF indicator lamp is on.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.

2. ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Adjust steering angle sensor neutral position. Refer to BRC-212, "Adjustment of Steering Angle Sensor Neutral Position" .
OK or NG
OK
>> GO TO 3.
NG
>> Check steering angle sensor. Refer to BRC-189, "Steering Angle Sensor System" .

3. INDICATOR LAMP CHECK
Check that VDC OFF indicator lamp is off.
OK or NG
OK
>> GO TO 4.
NG
>> Perform basic inspection. Refer to BRC-171, "Basic Inspection" .

4. CHECK SELF-DIAGNOSTIC RESULTS
Perform ABS actuator and electric unit (control unit) self-diagnosis.
Self-diagnosis results
ST ANGL SEN SAFE

CAN Communication System Inspection

EFS005K0

INSPECTION PROCEDURE

1. CHECK CONNECTOR
1.

Revision: February 2006

BRC-202

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

Inspection For Self-diagnosis Result "ST ANGLE SEN SIGNAL"

EFS005K1

INSPECTION PROCEDURE

1. PERFORM SELF-DIAGNOSIS
B

Perform ABS actuator and electric unit (control unit) self-diagnosis.
Self-diagnosis results

ST ANGLE SEN SIGNAL

Do self-diagnosis results indicate anything other than shown above?
YES >> Perform repair or replacement for the item indicated.
NO
>> Perform adjustment of steering angle sensor neutral position. Refer to BRC-212, "Adjustment of
Steering Angle Sensor Neutral Position" . GO TO 2.

2. PERFORM SELF-DIAGNOSIS AGAIN

1. Turn the ignition switch to OFF and then to ON and erase self-diagnosis results.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis again.
Are any self-diagnosis results displayed?
YES >> Replace steering angle sensor. Refer to BRC-218, "Removal and Installation" .
NO
>> Inspection End.

Inspection For Self-diagnosis Result "DECEL G SEN SET"

BRC

G
EFS005K2

INSPECTION PROCEDURE

1. PERFORM SELF-DIAGNOSIS
Perform ABS actuator and electric unit (control unit) self-diagnosis.

Self-diagnosis results
DECEL G SEN SET

2. PERFORM SELF-DIAGNOSIS AGAIN
L

1. Turn the ignition switch to OFF and then to ON and erase self-diagnosis results.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis again.
Are any self-diagnosis results displayed?
YES >> Replace decel G sensor. Refer to BRC-219, "Removal and Installation" .
NO
>> Inspection End.

VDC OFF Indicator lamp Does Not Illuminate

EFS005K3

INSPECTION PROCEDURE

1. CHECK VDC OFF INDICATOR LAMP
Disconnect ABS actuator and electric unit (control unit) connector E125.
Do the ABS warning lamp and VDC OFF indicator lamp illuminate?
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-216, "Removal and Installation" .
NO
>> Replace combination meter. Refer to IP-12, "COMBINATION METER" .

Revision: February 2006

BRC-203

2005 Xterra

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
[HDC/HSA/VDC/TCS/ABS]

Component Inspection

EFS005K4

VDC OFF SWITCH
Check the continuity between terminals 1 and 2.
1-2

: Continuity should exist when pushing the
switch.
Continuity should not exist when releasing
the switch.

PFIA0307E

HDS SWITCH
Check the continuity between terminals 1 and 2.
1-2

: Continuity should exist when pushing the
switch.
Continuity should not exist when releasing
the switch.

WFIA0327E

Revision: February 2006

BRC-204

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[HDC/HSA/VDC/TCS/ABS]

TROUBLE DIAGNOSES FOR SYMPTOMS
ABS Works Frequently

PFP:99999

A
EFS005K5

1. CHECK WARNING LAMP ACTIVATION

Make sure warning lamp remains off while driving.
OK or NG
OK
>> GO TO 2.
NG
>> Carry out self-diagnosis. Refer to BRC-178, "SELF-DIAGNOSIS" .

2. CHECK WHEEL SENSORS
Check the following.
●
Wheel sensor mounting for looseness
●
Wheel sensors for physical damage
●
Wheel sensor connectors for terminal damage or loose connections
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace as necessary.

BRC

3. CHECK FRONT AND REAR AXLES
Check front and rear axles for excessive looseness. Refer to FAX-5, "WHEEL BEARING INSPECTION" ,
RAX-6, "Rear Axle Bearing" (C200) or RAX-18, "Rear Axle Bearing" (M226).
OK or NG
OK
>> GO TO 4.
NG
>> Repair as necessary.

4. CHECK BRAKE FLUID PRESSURE

Check brake fluid pressure distribution.
Refer to BRC-171, "Basic Inspection" .
Is brake fluid pressure distribution normal?
YES >> Inspection End.
NO
>> Perform Basic Inspection. Refer to BRC-171, "Basic Inspection" .

Revision: February 2006

BRC-205

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[HDC/HSA/VDC/TCS/ABS]

Unexpected Pedal Action

EFS005K6

1. CHECK WARNING LAMP ACTIVATION
Make sure warning lamp remains off while driving.
OK or NG
OK
>> GO TO 2.
NG
>> Carry out self-diagnosis. Refer to BRC-178, "SELF-DIAGNOSIS" .

2. CHECK BRAKE PEDAL STROKE
Check brake pedal stroke.
Is pedal stroke excessive?
YES >> Perform Basic Inspection. Refer to BRC-171, "Basic
Inspection" .
NO
>> GO TO 3.

SBR540A

3. CHECK CONNECTOR AND BRAKING PERFORMANCE
1.
2.

Revision: February 2006

BRC-206

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[HDC/HSA/VDC/TCS/ABS]

Long Stopping Distance

EFS005K7

1. CHECK BASE BRAKING SYSTEM PERFORMANCE
1.
2.

Disable ABS by disconnecting ABS actuator and electric unit (control unit) connector.
Drive vehicle and check brake operation.
NOTE:
● Stopping distance may be longer than vehicles without ABS when road condition is slippery.
● Driving the vehicle with the ABS actuator and electric unit (control unit) disconnected may induce DTCs
in electrical control units using CAN communication. After the inspection, clear all DTCs. Refer to LAN21, "CAN COMMUNICATION" .
OK or NG
OK
>> Go to BRC-205, "ABS Works Frequently" .
NG
>> Perform Basic Inspection. Refer to BRC-171, "Basic Inspection" .

ABS Does Not Work

EFS005K8

BRC

CAUTION:
The ABS does not operate when the vehicle speed is 10 km/h (6 MPH) or less.

1. CHECK WARNING LAMP ACTIVATION
Turn ignition switch ON and check for warning lamp activation.
●
Warning lamp should activate for approximately 2 seconds after turning the ignition switch ON.
OK or NG
OK
>> Carry out self-diagnosis. Refer to BRC-178, "SELF-DIAGNOSIS" .
NG
>> Go to BRC-208, "ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On" .

Pedal Vibration or ABS Operation Noise

EFS005K9

NOTE:
During ABS activation, pedal vibration may be felt and a noise may be heard. This is normal and does not indicate a malfunction.

1. CHECK SYMPTOM
L

1. Apply brake.
2. Start engine.
Does the symptom occur only when engine is started?
YES >> Carry out self-diagnosis. Refer to BRC-178, "SELF-DIAGNOSIS" .
NO
>> GO TO 2.

2. RECHECK SYMPTOM
Does the symptom occur only when electrical equipment switches (such as headlamps) are turned on?
YES
NO

>> Check for radio, antenna or related wiring that is routed too close to the ABS actuator and electric
unit (control unit) and reroute as necessary.
>> Go to BRC-205, "ABS Works Frequently" .

Revision: February 2006

BRC-207

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[HDC/HSA/VDC/TCS/ABS]

ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On

EFS005KA

2. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY CIRCUITS
1.

3. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check continuity between ABS actuator and electric unit (control
unit) connector terminal 16 and ground and terminal 47 and ground.
Does continuity exist?
YES >> Replace ABS actuator and electric unit (control unit).
Refer to BRC-216, "Removal and Installation" .
NO
>> Repair harness or connectors between ABS actuator
and electric unit (control unit) and ground.

WFIA0196E

ABS Warning Lamp Stays On When Ignition Switch Is Turned On

EFS005KB

1. CARRY OUT SELF-DIAGNOSIS
Carry out self-diagnosis. Refer to BRC-178, "SELF-DIAGNOSIS" .
Are malfunctions detected in self-diagnosis?
YES >> Refer to BRC-179, "Display Item List" .
NO
>> Refer to DI-28, "WARNING LAMPS" .

Revision: February 2006

BRC-208

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[HDC/HSA/VDC/TCS/ABS]

Vehicle Jerks During TCS/VDC Activation

EFS005KC

2. ENGINE SPEED SIGNAL INSPECTION

Perform data monitor with CONSULT-II for the ABS actuator and electric unit (control unit).
Is the engine speed at idle 400 rpm or higher?
YES >> GO TO 4.
NO
>> GO TO 3.

3. ECM SELF-DIAGNOSIS

BRC

Perform ECM self-diagnosis.
Are self-diagnosis result items displayed?
YES >> After checking and repairing the applicable item, perform the ECM self-diagnosis again.
NO
>> GO TO 4.

6. CAN COMMUNICATION INSPECTION

Check the CAN communication system. Refer to BRC-202, "CAN Communication System Inspection" .
OK or NG
OK
>> Inspection End.
NG
>> Refer to LAN-21, "CAN COMMUNICATION" .

Revision: February 2006

BRC-209

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[HDC/HSA/VDC/TCS/ABS]

Stop Lamp Relay Inspection

EFS005KD

STOP LAMPS TURN ON THOUGH HDC DOES NOT FUNCTION

1. INSPECTION OF STOP LAMP RELAY
1.
2.
3.

Turn ignition switch OFF.
Disconnect stop lamp relay connector E12.
Check continuity between stop lamp relay terminals 3 and 5.
Condition

Continuity

12V direct current supply between
terminals 1 and 2

Yes

No current supply

OK or NG
OK
>> GO TO 2.
NG
>> Replace stop lamp relay.

SEF145X

2. INSPECTION OF STOP LAMP RELAY CIRCUIT
1.
2.

Disconnect ABS actuator and electric unit (control unit) connector E125.
Check continuity between ABS actuator and electric unit (control
unit) connector E125 terminal 13 and ground.
Continuity should not exist.

OK or NG
OK
>> Replace ABS actuator and electric unit (control unit).
Refer to BRC-216, "Removal and Installation" .
NG
>> Repair or replace harness or connector.
WFIA0353E

STOP LAMPS DO NOT TURN ON THOUGH HDC FUNCTIONS

1. INSPECTION OF STOP LAMP RELAY
1.
2.
3.

Turn ignition switch OFF.
Disconnect stop lamp relay connector E12.
Check continuity between stop lamp relay terminals 3 and 5.
Condition

Continuity

12V direct current supply between
terminals 1 and 2

Yes

No current supply

OK or NG
OK
>> Repair the stop lamp circuit.
NG
>> Replace stop lamp relay.

SEF145X

HDC Switch Inspection

EFS005KE

1. HDC SWITCH INSPECTION
Check if the HDC indicator lamp in the combination meter turns on or flashes when pressing HDC switch.
OK or NG
OK
>> Inspection End.
NG
>> GO TO 2.

Revision: February 2006

BRC-210

2005 Xterra

TROUBLE DIAGNOSES FOR SYMPTOMS
[HDC/HSA/VDC/TCS/ABS]

2. CHECK HDC SWITCH CIRCUIT
1.
2.

Disconnect ABS actuator and electric unit (control unit) connector E125.
Check continuity between ABS actuator and electric unit (control
unit) connector E125 terminal 9 and HDC switch connector
M155 terminal 2.

Continuity should exist.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace harness or connector.

D
WFIA0354E

3. CHECK HDC SWITCH GROUND

Check continuity between HDC switch connector M155 terminal 1
and body ground.

BRC

Continuity should exist.
OK or NG
OK
>> Replace HDC switch.
NG
>> Repair or replace harness or connector.

H
WFIA0355E

Revision: February 2006

BRC-211

2005 Xterra

ON-VEHICLE SERVICE
[HDC/HSA/VDC/TCS/ABS]

ON-VEHICLE SERVICE
Adjustment of Steering Angle Sensor Neutral Position

PFP:00000
EFS005KF

WITH CONSULT-II
1.
2.

BBIA0538E

Calibration of Decel G Sensor

EFS005KG

Revision: February 2006

BRC-212

2005 Xterra

ON-VEHICLE SERVICE
[HDC/HSA/VDC/TCS/ABS]
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be A
detected in self-diagnosis depending on control unit which carries out CAN communication.
3. Touch "START (NISSAN BASED VHCL)", "ABS", "WORK SUPPORT" and "DECEL G SEN CALIBRATION" on CONSULT-II screen in this order. Refer to BRC-177, "CONSULT-II BASIC OPERATION PRO- B
CEDURE" .
4. Touch "START".
CAUTION:
C
Set vehicle as shown in the display.
5. After approximately 10 seconds, touch "END". (After approximately 60 seconds, it ends automatically.)
D
6. Turn ignition switch OFF, then turn it ON again.
CAUTION:
Be sure to carry out above operation.
E
7. Run vehicle with front wheels in straight-ahead position, then
stop.
SFIA1162E
8. Select "DATA MONITOR", "SELECTION FROM MENU", and
BRC
"DECEL G SEN" on CONSULT-II screen. Then check that "DECEL G SEN" is within ±0.08G. If value is
more than specification, repeat steps 3 to 7.
9. Erase memory of ABS actuator and electric unit (control unit) and ECM.
G
10. Turn ignition switch to OFF.
H

Revision: February 2006

BRC-213

2005 Xterra

WHEEL SENSORS
[HDC/HSA/VDC/TCS/ABS]

WHEEL SENSORS
Removal and Installation

PFP:47910
EFS005SH

WFIA0405E

Front wheel sensor

Rear wheel sensor

REMOVAL
1.

INSTALLATION
●

–
–

–

●

Revision: February 2006

BRC-214

2005 Xterra

SENSOR ROTOR
[HDC/HSA/VDC/TCS/ABS]

SENSOR ROTOR
Removal and Installation

PFP:47970

A
EFS005SI

FRONT
The wheel sensor rotors are built into the wheel hubs and are not removable. If damaged, replace wheel hub
and bearing assembly. Refer to FAX-5, "Removal and Installation" .

REAR
Removal
1.

: 205-D002 (

—

)

Installation
1.

Install new sensor rotor on axle shaft using a suitable length
steel tube and a press. Make sure sensor rotor is fully seated.
CAUTION:
Do not reuse the old sensor rotor.
Install axle shaft assembly. Refer to RAX-19, "Removal and
Installation" .
CAUTION:
Do not reuse the axle oil seal. The axle oil seal must be
replaced every time the axle shaft assembly is removed
from the axle shaft housing.

BRC

H
WFIA0341E

Revision: February 2006

BRC-215

2005 Xterra

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
[HDC/HSA/VDC/TCS/ABS]

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Removal and Installation

PFP:47660
EFS005SK

WFIA0389E

To rear left

To rear right

To front left

To front right

From the master cylinder secondary
side

From the master cylinder primary
side

ABS actuator and electric unit (control unit)

Harness connector

Grommet

10. Collar

REMOVAL
1.
2.
3.

4.
5.

Revision: February 2006

BRC-216

2005 Xterra

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
[HDC/HSA/VDC/TCS/ABS]
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
To install, use a flare nut wrench (commercial service tool).
●
Always tighten brake tubes to specification when installing. Refer to BR-11, "BRAKE PIPING AND
HOSE" .
●
Never reuse drained brake fluid.
●
After installation of the ABS actuator and electric unit (control unit), refill brake system with new
brake fluid. Then bleed the air from the system. Refer to BR-10, "Bleeding Brake System" .
NOTE:
If the ABS actuator and electric unit (control unit) is replaced, make sure to adjust position of steering angle
sensor. Refer to BRC-142, "Adjustment of Steering Angle Sensor Neutral Position" .

BRC

Revision: February 2006

BRC-217

2005 Xterra

STEERING ANGLE SENSOR
[HDC/HSA/VDC/TCS/ABS]

STEERING ANGLE SENSOR
Removal and Installation

PFP:25554
EFS005KK

Refer to SRS-44, "Removal and Installation" .
NOTE:
●
The steering angle sensor is an integral part of the spiral cable.
●
If the ABS actuator and electronic unit (control unit) is replaced, make sure to adjust position of steering
angle sensor. Refer to BRC-212, "Adjustment of Steering Angle Sensor Neutral Position" .

Revision: February 2006

BRC-218

2005 Xterra

G SENSOR
[HDC/HSA/VDC/TCS/ABS]

G SENSOR
Removal and Installation

PFP:47930

A
EFS005KL

REMOVAL
1.
2.

E
WFIA0230E

INSTALLATION
BRC
Installation is in the reverse order of removal.
NOTE:
After performing the above work, calibrate the decel G sensor. Refer to BRC-212, "Calibration of Decel G Sensor" .
G

Revision: February 2006

BRC-219

2005 Xterra

G SENSOR
[HDC/HSA/VDC/TCS/ABS]

Revision: February 2006

BRC-220

2005 Xterra

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