Bendix Sd 13 4986 Users Manual

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1

ESP

®

is a registered trademark of DaimlerChrysler and is used by BCVS under license.

®

SD-13-4986

The Bendix® ESP® EC-80™ Controller

INTRODUCTION

The Bendix® ESP® EC‑80™ Electronic Control Unit (ECU)

is a member of a family of three Bendix®‑brand electronic

Antilock Braking System (ABS) devices used to help

improve the braking characteristics of air‑braked heavy‑

and medium‑duty trucks, tractors, and buses:

1. The Bendix® ABS ESP® ECU uses wheel speed sensors

to monitor four wheel‑ends to detect wheel‑slip or wheel

lock‑up during braking. The system intervenes when

needed — using Pressure Modulator Valves (PMVs)

to adjust and/or pulse the brake pressure — in order

to optimize the contact between the tires and the road

surface.

2. The Bendix® Automatic Traction Control (ATC) EC‑80™

ECU provides standard ABS; improves vehicle traction

during acceleration; and aid lateral stability while driving

through curves. The Bendix® ATC ECU communicates

with the engine’s Controller to provide Engine Torque

Limiting (ETL), and/or use Differential Braking (DB) to

make brake applications at individual wheels.

3. The Bendix ESP EC‑80 Controller provides — in

addition to the ABS and ATC functions described

above — advanced braking features referred to as the

Bendix® ESP® Electronic Stability Program. The Bendix

ESP EC‑80 Controller analyzes the vehicle's motion

compared to the driver's intended path and provides

Yaw Control (YC) and Roll Stability Program (RSP)

capabilities. When necessary, the system will intervene

to reduce the engine throttle, and/or apply the brakes

at one or more of the wheel ends — to help the vehicle

return to the intended direction.

TABLE OF CONTENTS Page

Components . . . . . . . . . . . . . . . . . . . . . 3‑4

Indicator Lamps and Power‑Up Sequence . . . . . 8‑9

ABS Operation. . . . . . . . . . . . . . . . . . . . 9‑10

ATC Operation. . . . . . . . . . . . . . . . . . . . 11‑12

ESP ABS With Stability Control . . . . . . . . . . . 12‑13

Important Safety Information About

The ESP Stability System . . . . . . . . . . . . . 13‑14

Troubleshooting . . . . . . . . . . . . . . . . . . . 17‑62

See page 63 for the full Table of Contents

Bendix®

EC‑80™

System Name

Previous

(Bendix®

EC‑60™ ECU)

Designations

Key Components Key System Features

(ECU Designation Shown

on the ECU Label)

ECU

Connector

Locations

Provided

See

Service Data

Sheet

ABS “Standard” ECU; Pressure Modulator Valves (PMVs);

Four Wheel Speed Sensors.

ABS [Antilock Braking]

(EC‑80 ABS) Two SD‑13‑4983

ATC “Premium”

Items above, plus: Automatic Traction

Control (ATC) Valve; Option of two more

Wheel Speed Sensors and PMVs.

ABS plus ATC [Traction Control]

(EC‑80 ATC) Three SD‑13‑4983

ESP®“Advanced”

All items above, plus: Yaw Rate Sensor;

Steering Angle Sensor; Load Sensor;

Steer‑axle ATC valve; Brake Demand

Sensor; and an Additional PMV

ABS plus ATC plus ESP

[Yaw Control (YC) and

Roll Stability Program (RSP®)].

(EC‑80 ESP)

Four SD‑13‑4986

(This

Document)

The driver is always responsible for the control

and safe operation of the vehicle at all times. The

Bendix® ABS system does not replace the need

for a skilled, alert professional driver, reacting

appropriately and in a timely manner, and using

safe driving practices.

FIGURE 1 - THE BENDIX® ESP® EC‑80™ CONTROLLER

Label Shows ECU

Designation

2

GENERAL SAFETY GUIDELINES

WARNING! PLEASE READ AND FOLLOW THESE INSTRUCTIONS

TO AVOID PERSONAL INJURY OR DEATH:

When working on or around a vehicle, the following guidelines should be observed AT ALL TIMES:

▲ Park the vehicle on a level surface, apply the

parking brakes and always block the wheels.

Always wear personal protection equipment.

▲Stop the engine and remove the ignition key

when working under or around the vehicle.

When working in the engine compartment,

the engine should be shut off and the ignition

key should be removed. Where circumstances

require that the engine be in operation, EXTREME

CAUTION should be used to prevent personal

injury resulting from contact with moving,

rotating, leaking, heated or electrically-charged

components.

▲Do not attempt to install, remove, disassemble

or assemble a component until you have read,

and thoroughly understand, the recommended

procedures. Use only the proper tools and

observe all precautions pertaining to use of those

tools.

▲If the work is being performed on the vehicle’s

air brake system, or any auxiliary pressurized air

systems, make certain to drain the air pressure

from all reservoirs before beginning ANY work

on the vehicle. If the vehicle is equipped with a

Bendix® AD-IS® air dryer system, a Bendix® DRM™

dryer reservoir module, or a Bendix® AD-9si™ air

dryer, be sure to drain the purge reservoir.

▲ Following the vehicle manufacturer’s

recommended procedures, deactivate the

electrical system in a manner that safely removes

all electrical power from the vehicle.

▲Never exceed manufacturer’s recommended

pressures.

▲Never connect or disconnect a hose or line

containing pressure; it may whip. Never remove

a component or plug unless you are certain all

system pressure has been depleted.

▲ Use only genuine Bendix® brand replacement

parts, components and kits. Replacement

hardware, tubing, hose,  ttings, etc. must be of

equivalent size, type and strength as original

equipment and be designed speci cally for such

applications and systems.

▲Components with stripped threads or damaged

parts should be replaced rather than repaired.

Do not attempt repairs requiring machining or

welding unless speci cally stated and approved

by the vehicle and component manufacturer.

▲Prior to returning the vehicle to service, make

certain all components and systems are restored

to their proper operating condition.

▲ For vehicles with Automatic Traction Control

(ATC), the ATC function must be disabled (ATC

indicator lamp should be ON) prior to performing

any vehicle maintenance where one or more

wheels on a drive axle are lifted off the ground

and moving.

▲The power MUST be temporarily disconnected

from the radar sensor whenever any tests USING

A DYNAMOMETER are conducted on a Bendix®

Wingman® Advanced™-equipped vehicle.

▲ You should consult the vehicle manufacturer's operating and service manuals, and any related literature,

in conjunction with the Guidelines above.

Even with the Bendix® ESP® system with the EC-80™

Controller, the driver remains responsible for ensuring

vehicle stability during operation. The braking system

can only function within the limits of physics. The

system helps mitigate potential vehicle stability

incidents, but cannot prevent them in all cases.

Other factors such as driving too fast for road, trafc

or weather conditions, oversteering, an excessively

high vehicle Center of Gravity (CG), or poor road

conditions can cause vehicle instability that is beyond

the capability of any stability system to mitigate. In

addition, the effectiveness of Bendix ESP system

with the EC-80 Controller can be greatly reduced on

vehicles towing multiple trailer combinations.

The Bendix ESP system with the EC-80 Controller

(see page 12) may only be used on vehicles tested and

approved by Bendix engineering. The tests produce

a validated parameter data set for use by the vehicle’s

Bendix ESP EC-80 Electronic Control Unit (ECU).

When replacing an ECU, only specic Controllers —

with the correct parameter set — may be used. See

“Obtaining a New Bendix ESP EC‑80 Controller” on

page 17 for further details.

Bendix ESP system with the EC-80 Controller-equipped

vehicles should not be driven on high- banked roads —

such as those found on high-speed test or race tracks.

Test personnel must have the Bendix ESP system's

stability features disabled prior to operating a vehicle

on such tracks.

3

For vehicles with the (optional) Hill Start Aid (HSA) system

(sometimes referred to as a “Hill Start Assist”, or simply “Hill

Start”), this feature interfaces between the transmission

and the braking system. HSA helps the driver prevent

the vehicle from rolling downhill when moving up a steep

incline from a stationary position. See page 6 for more

information.

YAW CONTROL (YC)

A Bendix® EC‑80™ ESP® Controller includes Yaw Control

(YC) functionality. Yaw Control has the ability to apply

brakes to individual wheel ends, as well as applying the

trailer brakes, to counteract trailer “push” that — during

certain maneuvers — could lead to a loss‑of‑control or

a jackknife incident. See "Yaw Stability" on page 13 for

further details.

ROLL STABILITY PROGRAM (RSP)

The Bendix® Roll Stability Program (RSP), is an all‑axle

ABS solution that helps decrease vehicle speed by

reducing the engine's throttle and applying all vehicle

brakes as needed, mitigating the vehicle's tendency to

roll over. RSP focuses on reducing the vehicle’s speed

below the critical roll threshold during direction‑changing

maneuvers — such as driving on curved highway exit

ramps or obstacle avoidance maneuvers on dry, high

friction surfaces. See "ESP ABS with Stability Control"

on page 12 for further details.

During an RSP system intervention, the vehicle

automatically decelerates. RSP can slow the

vehicle with or without the operator applying

the brake pedal, and even when the operator is

applying the throttle.

COMPONENTS

The Bendix ESP EC‑80 Controller’s ABS function utilizes

the following components:

• Bendix® WS‑24™ Wheel Speed Sensors (four or

six, depending on the conguration), each with a

clamping sleeve. [Refer to SD-13-4860]

• Bendix® M‑40QR™ or M‑40‑HF™ Pressure Modulator

Valves (four, ve, or six may be present) [refer to

SD-13-4958]. For legacy systems where a Bendix®

M‑32™ or M‑32QR™ Pressure Modulator Valve is

used, refer to SD-13-4870.

• A dash‑mounted tractor ABS Indicator Lamp

• A service brake Relay Valve

• A dash‑mounted trailer ABS Indicator Lamp

• An optional blink code Activation Switch

• An optional ABS Off‑road Switch

The Bendix ESP EC‑80 Controller's ESP/RSP function

utilizes the following additional components:

• A Steer Axle Traction Control Valve (may be integral

to the service brake Relay Valve or a stand‑alone

device)

90° Speed

Sensors

Sensor

Clamping

Sleeve

Straight Speed

Sensors

FIGURE 2 - BENDIX® WS‑24™ WHEEL SPEED SENSORS

Delivery

(Port 2) Supply

(Port 1)

Exhaust (Port 3)

Electrical

Connector

M-40X™

Modulator

FIGURE 3 - EXAMPLE OF A BENDIX M‑40X™ MODULATOR

• A dash‑mounted ESP Status/Indicator Lamp (also

serves as the ATC Status/Indicator Lamp)

• A Bendix® SAS‑60™ Steering Angle Sensor

(mounted to the steering column ‑ See Figure 4)

When replacing a steering wheel, take care not to

damage the Steering Angle Sensor or interfere with

its operation, and the Steering Angle Sensor must be

recalibrated (see Troubleshooting section.)

Straight

Connector

90° Connectors

FIGURE 4 - EXAMPLES OF STEERING ANGLE SENSORS

4

• Bendix® YAS‑60™ or YAS‑70X™ Yaw Rate/Lateral

Acceleration Sensors (typically mounted to a cross‑

member near the back of the vehicle cab). See

Figure 5.

• Brake Demand Sensors (installed in the primary

and secondary delivery circuits)

• A Load Sensor (typically installed in the suspension

air bag)

• An additional Modulator Valve (Bendix® M‑40QR™ or

M‑40HF™ Pressure Modulator Valve) that controls

the pressure applied to the trailer brakes during a

system intervention

The Bendix® ESP® EC‑80™ Controller's ATC function

utilizes the following additional components:

• A drive axle Traction Control Valve (may be integral

to the service brake relay valve or a stand‑alone

device)

• A dash‑mounted ATC Status/Indicator Lamp

• A J1939 serial communication Control Module

• A J1939‑ or ECU hardware‑provided Stop Lamp

Switch Input

• An optional ATC Mud/Snow Switch (sometimes

referred to as an ATC off‑road switch)

Yaw/Lateral

Accelerator Sensors

(Two examples

shown.)

Brake Demand/

Load Sensor

FIGURE 5 - YAW AND BRAKE DEMAND/LOAD SENSORS

The Bendix ESP EC‑80 Controller's Hill Start Aid function

utilizes the following additional components:

• A Bendix® AT‑3™ Traction Control Valve

• A dash‑mounted Hill Start Status/Indicator Lamp

• A dash‑mounted Enable/Disable Switch

• A Bendix® RV‑3™ Pressure Reducing Valve

• A Bendix® DC‑4® Double Check Valve

Bendix® RV-3™

Pressure

Reducing Valve

Bendix® AT-3™

Traction Control

Valve

Bendix® DC-4®

Double Check

Valve

FIGURE 6 - ADDITIONAL VALVES NECESSARY FOR THE

HILL START AID FEATURE

BENDIX® ETRAC™ AUTOMATED AIR

SUSPENSION TRANSFER SYSTEM

The Bendix® eTrac™ automated air pressure transfer system

is used on 6 x 2 semi‑tractors that feature Bendix® ATC

and ESP Antilock Brake Systems (ABS). This system

complements the Bendix® SMART ATC™ traction control

feature of our ABS system to provide improved traction at

low speeds (e.g. pulling away on an inclined ramp, or in

slippery conditions such as mud or snow‑covered surfaces,

etc.) When active, the Bendix eTrac system vents — or

“dumps” — the air pressure of the tag axle suspension

air bags, and increases the air pressure in the drive axle

suspension air bags to a pre‑determined maximum. This

action helps the drive axle to gain more traction.

See SD-13-21021 for more information about the Bendix®

eTrac™ Automated Air Suspension Transfer System.

ECU MOUNTING

The Bendix ESP EC‑80 Controller is not protected against

moisture, and must be mounted in an environmentally

protected area.

All wire harness connectors must be properly seated. The

use of secondary locks is strongly recommended.

The Bendix ESP EC‑80 Controller utilizes connectors from

the AMP MCP 2.8 product family.

HARDWARE CONFIGURATIONS

Bendix ESP EC‑80 Controllers support applications up to

six sensor/six modulator (6S/6M) installations with ATC

and drag torque control. They can also support Hill Start

functions. All 12 volt models support Power Line Carrier

(PLC). 24 volt models do not support PLC. See Figure 7

for more details.

5

ABS

Off-

Road ATC ATC

Mud/Snow Blink

Codes ESP/

RSP

HSA

Hill Start

Aid Feature

Bendix®

eTrac™

system*

Input

Voltage PLC Modu-

lators

(PMVs)

Retarder

Relay Sensors

Serial

Communication

J1939

Optional Optional Optional 12/24 4/5/6 4/6

* For information about the Bendix® eTrac™ automated air suspension transfer system, see SD‑13‑21021

FIGURE 7 - BENDIX® ESP® EC‑80™ CONTROLLER FEATURES

BENDIX® ESP® EC-80™ CONTROLLERS USE

POWER LINE CARRIER (PLC)

All new towing vehicles built since March 1, 2001, have had

an in‑cab trailer ABS Indicator Lamp installed.

Trailers built since March 1, 2001, transmit the status of

the trailer ABS over the power line (the blue wire of the

J560 connector) to the tractor using a Power Line Carrier

(PLC) signal. See Figures 8 and 9. Typically the signal is

broadcast by the trailer ABS Electronic Control Unit (ECU).

FIGURE 8 - POWER LINE WITHOUT PLC SIGNAL

FIGURE 9 - POWER LINE WITH PLC SIGNAL

The application of PLC technology for the heavy vehicle

industry in North America is known as “PLC4Trucks.”

The Bendix® ESP® EC‑80™ Controller supports PLC

communications in accordance with SAE J2497.

PLC SIGNAL

An oscilloscope can be used to measure or identify the

presence of a PLC signal on the power line. The PLC

signal is an amplitude and frequency‑modulated signal.

Depending on the ltering and load on the power line,

the PLC signal amplitude can range from 5.0 mVp‑p to

7. 05 Vp ‑ p.

Suggested oscilloscope settings are AC coupling, with one

volt/div, 100 µsec/div. The signal should be measured at

the ignition power input of the Bendix EC‑80 Controller.

Note: An ABS trailer equipped with PLC, or a PLC

diagnostic tool, must be connected to the vehicle in order

to generate a PLC signal on the power line.

BENDIX ESP EC-80 CONTROLLER INPUTS

Battery and Ignition Inputs

The Bendix ESP EC‑80 Controller operates at a nominal

supply voltage of 12 or 24 volts, depending on the ECU.

The battery input is connected through a 30 amp fuse

directly to the battery.

The ignition input is applied by the ignition switch circuit

through a 5 amp fuse.

Ground Input

The Bendix ESP EC‑80 Controller supports one ground

input. See pages 52 and 53 for wiring system schematics.

ABS Indicator Lamp Ground Input

The Bendix ESP EC‑80 Controller requires a second

ground input (X1‑12) for the ABS indicator lamp. The X1

wire harness connector contains an ABS indicator lamp

interlock (X1‑15), which shorts the ABS indicator lamp

circuit (X1‑18) to ground if the connector is removed from

the ECU.

Bendix® WS-24™ Wheel Speed Sensors

Wheel speed data is provided to the Bendix ESP EC‑80

Controller from the Bendix® WS‑24™ wheel speed sensor

(see Figure 2). Vehicles have an exciter ring (or “tone

ring”) as part of the wheel assembly. As the wheel

turns, the teeth of the exciter ring pass the wheel speed

sensor, generating an AC signal. The Bendix ESP EC‑80

Controller receives the AC signal, which varies in voltage

and frequency as the wheel speed changes.

Vehicle axle configurations determine the number of

Bendix WS‑24 wheel speed sensors that must be used.

A vehicle with a single rear axle requires four wheel speed

sensors. Vehicles with two rear axles can utilize six wheel

speed sensors for optimal performance.

6

Diagnostic Blink Code Switch

A momentary switch that grounds the ABS Indicator Lamp

output is used to place the ECU into the diagnostic blink code

mode and is typically located on the vehicle’s dash panel.

Optional ABS Off-Road Switch and Indicator

Lamp Operation

Vehicle operators use an optional dash‑mounted switch to

place the Bendix® ESP® EC‑80™ Controller into the ABS

off‑road mode. See "Optional ABS Off-Road Mode" on

page 10 for further details. In some cases, ECUs may

also be put into the ABS off‑road mode by one of the other

vehicle control modules, using a J1939 message to the

Bendix ESP EC‑80 Controller.

(If you need to know if a specic Bendix ESP EC‑80

Controller uses a J1939 message to operate the lamp,

contact the Bendix Tech Team. E‑mail the Tech Team

at ABS@bendix.com (be sure to specify the ECU part

number), or call 1‑800‑AIR‑BRAKE (1‑800‑245‑2725).

The ABS off-road mode should not be used on

normal, paved road surfaces because vehicle

stability and steerability may be adversely affected.

When the ECU is placed in the ABS off-road mode,

the ABS Indicator Lamp will ash constantly (at a

rate of once per 2.5 seconds) to notify the vehicle

operator that the off-road mode is active.

Optional ATC Mud/Snow (Off-Road) Switch and

Indicator Lamp Operation (also see page 8.)

The Bendix ESP system uses a dash‑mounted switch for the

operator to place the ECU into the ATC Mud/Snow mode.

Optional Hill Start/Hill Start Assist Feature

Switch and Lamp Operation (see also page 8.)

ESP Controllers use a dash‑mounted switch for the

operator to place the ECU into the hill start mode. This

feature interfaces between the transmission and the

braking system to help the driver prevent the vehicle from

rolling downhill when moving up a steep incline from a

stationary position.

With Hill Start Aid Feature option you lose the ABS

off-road function and the retarder relay output.

When the ECU is placed in the Hill Start Aid (HSA) feature

mode, the HSA Indicator Lamp will ash constantly (at a

rate of once per 2.5 seconds) to notify the vehicle operator

that the HSA mode is active. The ECU receives J1939

messages from the transmission to engage the HS/HSA

components. When engaged, the system applies 44 psi to

the rear brakes for three (3) seconds then releases. This

function is totally controlled by the automatic transmission.

Stop Lamp Switch (SLS)

The Bendix ESP EC‑80 Controller monitors the vehicle

stop lamp status. Certain vehicle functions, such as

ATC and All‑Wheel Drive (AWD), use the status of the

stop lamp to determine when the driver makes a brake

application. This can be provided to the ECU via J1939

communications, or hardware input.

Brake Demand Sensors

The brake demand sensors provide the Controller with an

indication of driver‑applied brake pressure. One is installed

in the primary air brake circuit, and another is installed in

the secondary air brake circuit.

Load Sensor

The load sensor provides the Controller with an indication

of the vehicle load. It is typically installed in one of the

suspension air bags.

Bendix® SAS-70X™ Steering Angle Sensor

Bendix® brand Steering Angle Sensors (SAS) are used to

report the steering wheel position to the Controller, utilizing

a dedicated serial communications link that is shared with

the Yaw Rate Sensor. The Controller supplies the power

and ground inputs to the Bendix® SAS‑70X™ sensor.

The Bendix SAS‑70X sensor is available with two different

styles of wire harness connectors. (See Figure 4.)

Bendix® YAS-60™ or YAS-70X™ Yaw Rate/Lateral

Acceleration Sensors

Bendix® brand yaw rate/lateral acceleration sensors are

used to provide the Controller an indication of vehicle

lateral acceleration and rotation around the vertical axis.

This information is provided to the Controller, utilizing a

dedicated serial communications link that is shared with

the Bendix® SAS‑60™ sensor. The Controller supplies the

power and ground inputs to the yaw rate sensor.

BENDIX® ESP® EC-80™ CONTROLLER

OUTPUTS

Bendix® M-40QR™ and M-40HF™ Pressure

Modulator Valves (PMVs)

The Bendix ESP EC‑80 Controller operates Bendix®

M‑40QR™ and M‑40HF™ Pressure Modulator Valves

(PMVs) to modify the driver‑applied air pressure to the

service brakes during ABS, ATC, RSP or YC activation

(see pages 9-13). The PMV is an electropneumatic

control valve and is the last valve that air passes through

on its way to the brake chamber. The modulator hold and

release solenoids are activated to "modulate" or "control"

the brake pressure during an antilock braking event. The

hold solenoid is normally open and the release solenoid is

normally closed, such that the PMV nominally allows air to

ow through. This design allows for air delivery to brake

chambers in the event of electrical trouble.

7

The Bendix® ESP® EC‑80™ Controller also utilizes an

additional Pressure Modulator Valve (PMV) for control

of the trailer service brakes during stability interventions.

Traction Control Valve (TCV)

Bendix ESP EC‑80 Controllers use two TCVs, one on the

steer axle and one on the drive axle. The TCV may be a

separate valve or integrated into the rear axle relay valve.

The Controller will activate the drive axle TCV during

differential braking ATC events.

During stability interventions, the Controller will activate

both the steer axle and drive axle TCVs as required.

Stop Lamp Output

The Controller provides an output to control a relay

that illuminates the vehicle stop lamps during stability

interventions. This information is also available using the

J1939 serial communications link.

ABS Indicator Lamp Control with Optional

Diagnostic Blink Code Switch

The Bendix ESP EC‑80 Controller has internal circuitry to

control the ABS Indicator Lamp on the dash panel.

The ABS Lamp Illuminates:

1. During power up (e.g. when the vehicle is started) for

approximately three (3) seconds and turns off after the

self‑test is completed, providing no Diagnostic Trouble

Codes (DTCs) are present on the ECU;

2. When full ABS operation is not available due to the

presence of a DTC on the ECU;

3. If the ECU is unplugged or has no power;

4. When the ECU is placed into the ABS off‑road

mode (the lamp ashes steadily at a rate of once per

2.5 sec.); or

5. To display blink codes for diagnostic purposes after the

external diagnostic switch is activated.

The Bendix ESP EC‑80 Controller may communicate

with other vehicle control modules to operate the ABS

Indicator Lamp using serial communications. (If you

need to know if this Bendix ESP EC‑80 Controller uses

serial communications to operate the lamp; e‑mail ABS@

bendix.com, (be sure to specify the ECU part number), or

call 1‑800‑AIR‑BRAKE/1‑800‑247‑2725 and speak to the

Bendix Tech Team.)

Indicator Lamp Control Using Serial

Communications Links

As mentioned above, depending on the vehicle

manufacturer, the dash indicator lamps (ABS, ATC,

ESP, and trailer ABS) may be controlled using serial

communications links. In these cases, the Bendix ESP

EC‑80 Controller will send a serial communications

message over the J1939 link, indicating the required status

of the lamp(s). Another vehicle control module receives

the message and controls the indicator lamp(s).

Dynamometer Mode Indicator Lamp Operation

When the Bendix ESP EC‑80 Controller is put into the

Dynamometer mode for testing purposes, the ATC

Indicator Lamp will be illuminated.

Retarder Relay Disable Output

The retarder relay disable output may be used to control a

retarder disable relay. When congured to use this output,

the ECU will energize the retarder disable relay and inhibit

the use of the retarder as needed.

If the ECU is congured for the Hill Start/ Hill Start Assist

feature (HS/HSA), the retarder relay output pin is used to

control the Hill Start status lamp. As a result, the vehicle

loses the retarder relay function when it has the Hill Start

feature.

SAE J1939 Serial Communications

A Controller Area Network (CAN) data link (SAE J1939) is

provided for communication. This link is used for various

functions, such as:

• Diagnostic purposes.

• To disable retarding devices during ABS operation.

• To request that the torque converter disable lock‑up

during ABS operation

• To share information such as wheel speed and ECU

status with other vehicle control modules.

Bendix ESP EC‑80 Controllers utilize the J1939 data link

for:

• ATC and drag torque control functions.

• Vehicle stability functions.

Trailer ABS Indicator Lamp Control

The Bendix ESP EC‑80 Controller will activate a trailer ABS

Indicator Lamp (located on the dash panel) that indicates

the status of the trailer ABS unit on one, or more trailers, or

dollies that are equipped with PLC functionality. Typically,

the Bendix ESP EC‑80 Controller directly controls the

trailer ABS Indicator Lamp based on the information it

receives from the trailer ABS, via PLC.

Alternatively, some vehicles require the Bendix ESP EC‑80

Controller to activate the trailer ABS Indicator Lamp by

communicating with other vehicle Controllers using serial

communications.

(If you need to know if this Bendix ESP EC‑80 Controller

uses a serial communications message to operate the

lamp, e‑mail ABS@bendix.com (be sure to specify the ECU

part number), or call 1‑800‑AIR‑BRAKE (1‑800‑245‑2725)

and speak to the Bendix Tech Team.)

Interaxle Differential Lock Control

(AWD Transfer Case)

Bendix ESP EC‑80 Controllers can control the interaxle

differential lock (AWD transfer case). This is recommended

on AWD vehicles, but the ECU must be specially congured

to provide this feature. E‑mail ABS@bendix.com for more

details.

8

INDICATOR LAMPS AND POWER-UP

SEQUENCE

NOTICE: The vehicle operator should Verify the proper

operation of all installed indicator lamps (ABS, ATC/ESP,

and trailer ABS) when applying ignition power and during

vehicle operation. See Figure 10.

Lamps that do not illuminate as expected when ignition

power is applied, or remain illuminated, indicate the need

for maintenance.

ABS System

Status Indicators

at Start-Up

Trailer ABS

Indicator Lamp

(PLC Detected)**

Trailer ABS

Indicator Lamp**

(PLC Not Detected)

Powered Vehicle ABS

Indicator Lamp

Power

Application

ON

OFF

ON

OFF

0.5 2.0 2.5 3.0 (sec.)1.5

ON

OFF

ATC/ESP

enabled

No ESP

or ATC

ATC/ESP System

Status Indicator

at Start-Up

ON

OFF

Power

Application

ON

OFF

0.5 2.0 2.5 3.0 (sec.)1.5

FIGURE 10 - BENDIX® ESP® EC‑80™ CONTROLLER INDICATOR LAMP BEHAVIOR

Mode ABS

Lamp ATC/ESP Lamp Trailer

ABS Lamp HSA

Lamp Comments

At Vehicle Startup

Ignition on ‑ start up

[trailer with Power Line

Carrier (PLC)]

ON for

three (3)

seconds*

ON for 2.5

seconds*

ON for

three (3)

seconds**

ON for

three (3)

seconds*

* If any of the described lamp behaviors

do not occur — or if the lamp remains

on during operation — have the vehicle

serviced by a qualied mechanic as

soon as possible to restore full system

functionality.

** Some vehicle manufacturers may

illuminate the trailer ABS indicator lamp

at power‑up regardless of whether a

PLC signal is detected from the trailer or

not. Consult the vehicle manufacturer’s

documentation for more details.

3 seconds after ignition

[with no Diagnostic

Trouble Codes (DTCs)] Lamp OFF*Lamp OFF*Lamp OFF** Lamp

OFF*

Special Mode Operation

ABS

Off-Road

Mode

Normal

Lamp ashes

slowly (every 2.5

seconds)

Lamp OFF • Uses dash switch

• Not for rm road surfaces

• Allows more wheel lock‑up (less ABS intervention)

• Mode only applies under 25 mph (Over 25 mph, the system reverts to

full ABS ‑ including ATC/ESP — and upon exiting off‑road mode, the

ATC lamp extinguishes.)

During an ATC

Event Flashes quickly

‑— OR, depending on vehicle options (a vehicle can have either ABS off‑road or HSA) —

Vehicles with Hill Start Aid (HSA):

During HSA Mode

(“Hill Start” / “Hill Start Assist”)

During HSA Event Lamp OFF • The HSA lamp is illuminated only at power‑

up, or if an HSA DTC is present

HSA Manually Disabled Flashes

slowly

Deep

Mud/

Snow/

Mode

Normal OFF Flashes slowly

(every 2.5

seconds) • Uses dash switch

• Increases allowable wheel slip during ATC interventions

• Not for rm road surfaces

During an

ATC/ESP

Event OFF Flashes quickly

During an Automatic Traction Control (ATC) Event Flashes quickly • Reduces wheel slip during acceleration at low speeds

During Dynamometer Mode Lamp ON

(ATC

Disabled)

• Disables ATC monitoring functions

• When not in Dynamometer Mode, an illuminated lamp indicates an

ATC DTC is present

During an ESP Event Flashes quickly •

System intervenes to reduce the risk of rollovers, loss‑of‑control, etc.

Dash Lamp Behavior for the

Bendix® ESP® EC-80™ Controller

TRLR

ABS

ATC

HSA

9

ABS Indicator Lamp Operation (Bulb Check)

The Bendix® ESP® EC‑80™ Controller will illuminate the

ABS Indicator Lamp for approximately three seconds when

ignition power is applied, after which the lamp will extinguish

if no Diagnostic Trouble Codes (DTCs) are detected.

The Controller will illuminate the ABS Indicator Lamp

whenever full ABS operation is not available due to a DTC.

In most cases, partial ABS is still available.

ATC/ESP Status/Indicator Lamp Operation

The Bendix ESP EC‑80 Controller will illuminate the ATC/

ESP lamp for approximately 2.5 seconds when ignition

power is applied, after which the lamp will extinguish if

no DTCs are detected. The Controller will continuously

illuminate the ATC/ESP Indicator Lamp whenever ESP or

ATC is disabled due to a DTC.

During an ESP or ATC intervention, the lamp will ash

rapidly (2.5 times per second). When the Controller is

placed in the ATC Mud/Snow (off‑road) mode, the lamp

will ash slowly at a rate of once every 2.5 seconds.

Trailer ABS Indicator Lamp Operation

The Controller will control the Trailer ABS Indicator Lamp

when a PLC signal (SAE J2497) from a trailer ABS ECU

is detected.

Hill Start Assist (HSA) Indicator Lamp Operation

Vehicles with HSA enabled, will illuminate the HSA

Indicator Lamp when ignition power is applied. The lamp

will extinguish if there are no issues with the HSA system.

Pressure Modulator Valve (PMV) and Traction

Control Valve (TCV) Chuff Test

Driver

Right Steer

Left Steer

Right

Additional

Left

Additional

Right Drive

Left Drive

FIGURE 11 - VEHICLE ORIENTATION (TYPICAL)

After the performance of the conguration test, the Bendix

ESP EC‑80 Controller will perform a Bendix‑patented PMV

and TCV Chuff Test. The Chuff Test is an electrical and

pneumatic PMV test that can assist maintenance personnel

in verifying proper PMV wiring and installation.

When ignition power is applied, each modulator solenoid

is briey energized. If the air system is fully charged and

the service brake pedal is depressed during ignition, the

modulator creates a single, sharp audible “chuff” of air

pressure. The modulators are energized in a certain

pattern: right front; left front; right rear; then left rear.

This test is performed only when the vehicle is stationary

(if the vehicle moves, the Chuff Test will not be performed).

The Bendix ESP EC‑80 Controller will perform a PMV

Chuff Test on all installed modulators in the following order:

• Steer Axle Right PMV;

• Steer Axle Left PMV;

• Drive Axle Right PMV;

• Drive Axle Left PMV;

• Additional Axle Right PMV;

• Additional Axle Left PMV; then

• Drive Axle TCV

The pattern will then repeat itself. See Figure 11.

Vehicles with a Bendix ESP EC‑80 Controller — following

the completion of the second round of PMV & TCV Chuff

Tests — the Controller (if congured to do so) will perform

a test to cross‑check the trailer PMV operation with the

vehicle stop lamps. If the trailer PMV circuit is mis‑wired

(including the steer axle TCV), the PMV will exhaust a large

amount of air, or none at all.

NOTICE: If there are any active DTCs, the stop lamp

cross‑check portion of the Chuff Test will not be carried out

until all DTCs are fully diagnosed and the corresponding

repairs are successfully conducted. The ESP/ATC dash

indicator will also illuminate when there are active ABS,

ATC or ESP DTCs.

The ECU will not perform the PMV Chuff Test when wheel

speed sensors show that the vehicle is in motion.

ABS OPERATION

Bendix® ABS uses wheel speed sensors, ABS pressure

modulator valves, and an ECU to control either four or six

wheels of a vehicle. The Bendix ESP EC‑80 Controller

monitors individual wheel turning motion during braking,

and adjusts or modulates the brake pressure at the wheel

end. When excessive wheel slip — or wheel lock‑up — is

detected, the Bendix ESP EC‑80 Controller will activate

the pressure modulator valves to automatically reduce

the brake pressure at one or more of the wheel ends.

By these actions, the ABS system helps to maintain the

vehicle's lateral stability and steerability during heavy brake

applications and during braking on slippery surfaces.

Steer Axle Control

Although both wheels of the steer axle have their own

wheel speed sensor and pressure modulator valve, the

Bendix ESP EC‑80 Controller blends the applied braking

force between the two steering axle brakes. This Bendix

patented brake application control, called Modified

Individual Regulation (MIR), is designed to help reduce

steering wheel pull during an ABS event on road surfaces

with poor traction, or areas of poor traction (e.g. asphalt

road surfaces with patches of ice).

10

Single Drive Axle Control (4x2 Vehicle)

For vehicles with a single rear drive axle (4x2), the brakes

are operated independently by the Bendix® ESP® EC‑80™

Controller, based on the individual wheel behavior.

Dual Drive Axle Control (4S/4M Conguration)

For vehicles with dual drive axles (6x4) using a 4S/4M

conguration, one ABS modulator controls both of the

right‑side rear wheels; the other modulator controls both

of the left‑side rear wheels. Both wheels on each side

receive equal brake pressure during an ABS stop. The

rear wheel speed sensors must be installed on the axle

with the lightest load.

Dual Rear Axle Control (6S/6M Conguration)

For vehicles with dual rear axles (6x4, 6x2) using a 6S/6M

conguration, the rear wheels are controlled independently.

Therefore, brake application pressure at each wheel is

adjusted according to the individual wheel behavior on

the road surface.

6x2 Vehicles with 6S/5M Conguration

6x2 vehicles can utilize a 6S/5M conguration, with the

additional axle (a non‑driven rear axle) having two sensors,

but only one Pressure Modulator Valve (PMV). In this case,

the PMV controls both wheels on the additional axle. The

additional axle wheels would receive equal brake pressure,

based on the wheel that is currently experiencing the most

wheel slip.

Normal Braking

During normal braking, brake pressure is delivered through

the ABS PMV and into the brake chamber. If the ECU

does not detect excessive wheel slip, it will not activate

ABS control, and normal vehicle service braking is applied.

Retarder Brake System Control

On surfaces with low traction, application of the retarder

can lead to high levels of wheel slip at the drive axle wheels,

which can adversely affect vehicle stability.

To prevent this, the Bendix ESP EC‑80 Controller switches

off the retarder as soon as a lock‑up is detected at one (or

more) of the drive axle wheels.

When the ECU is placed in the ABS off‑road mode (on

vehicles equipped with this optional feature), it will switch

off the retarder only when ABS is active on a steer axle

wheel and a drive axle wheel.

Optional ABS Off-Road Mode

On some road conditions, particularly when the driving

surface is soft, the stopping distance with conventional

ABS may be longer than without ABS. This can occur

when a locked wheel on soft ground or loose gravel plows

up the road surface in front of the tire, changing the rolling

friction value. Although vehicle stopping distance with a

locked wheel (in the absence of ABS) may be shorter than

corresponding stopping distance with conventional ABS

control, vehicle steerability and stability would be reduced.

Bendix ESP EC‑80 Controllers have an optional dash

switch that initiates a modied ABS control mode (known

as "off‑road ABS") that more effectively accommodates

these soft road conditions to shorten stopping distance

while maintaining optimal vehicle steerability and stability.

Note: Off‑road mode is not available if the vehicle is

equipped with Hill Start / Hill Start Assist (HS or HSA).

The ABS off-road mode should not be used on

normal, paved road surfaces because vehicle

stability and steerability may be reduced. The ABS

Indicator Lamp will ash slowly to indicate to the

driver that the ABS off-road mode is engaged.

When ABS off-road mode is engaged, stability

functions are disabled at speeds below approximately

25 mph/40 kph. The ATC/ESP dash lamp will illuminate

to indicate to the driver that the stability system is

disabled.

The vehicle manufacturer should provide the optional ABS

off‑road function only for vehicles that operate on unpaved

surfaces — or that are used in off‑road applications — and

is responsible for ensuring that vehicles equipped with the

ABS off‑road function meet all FMVSS‑121 requirements

and have adequate operator indicators and instructions.

The vehicle operator activates the off‑road function with a

switch on the dash panel. A ashing ABS Indicator Lamp

indicates to the driver that the ABS off‑road function is

engaged. To exit the ABS off‑road mode, depress and

release the switch. A new ignition cycle will also cause

the ECU to exit the ABS off‑road mode.

All-Wheel Drive (AWD) Vehicles

AWD vehicles with an engaged interaxle differential (steer

axle to rear axle) / AWD transfer case, may have negative

effects on ABS performance. Optimum ABS performance

is achieved when the lockable differentials are disengaged,

allowing individual wheel control.

Bendix ESP EC‑80 Controllers can be programmed

specically for this conguration to control the differential

lock/unlock solenoid in the AWD transfer case. When

programmed to do so, the ECU will disengage the locked

interaxle/AWD transfer case during an ABS event and

reengage it once the ABS event has ended.

11

ATC OPERATION

ATC Functional Overview

Just as ABS improves vehicle stability during braking,

Automatic Traction Control (ATC) improves vehicle stability

and traction during vehicle acceleration. The Bendix®

ESP® EC‑80™ Controller's ATC function uses the same

wheel speed information and modulator control as the

ABS function. The Bendix ESP EC‑80 Controller detects

excessive drive wheel speed; compares the speed to the

front, non‑driven wheels; and reacts to help bring the wheel

spin under control. The Controller can be congured to use

engine torque limiting and/or differential braking to control

wheel spin. For optimal ATC performance, both methods

are recommended.

ATC/ESP Lamp Output/ATC Mud/Snow Switch

Input

Bendix ESP EC‑80 Controllers operate the ATC/ESP dash

lamp as follows.

The ATC/ESP dash lamp illuminates:

1. During power up (e.g. when the vehicle is started) for

approximately 2.5 seconds and turns off after the self

test is completed, providing no Diagnostic Trouble

Codes (DTCs) are present.

2. When ESP or ATC is disabled for any reason.

3. During an ESP or ATC event (the lamp will ash rapidly

at a rate of 2.5 times per second).

4. When the ECU is placed in the ATC off‑road mode

(the lamp will ash steadily at a rate of once every 2.5

seconds). This noties the vehicle operator that the

ATC Mud/Snow mode is active.

5. When the ECU is placed in the ABS off‑road mode.

When in this mode, ESP will be disabled below 25 mph

and its inactive status will be indicated by a steadily

illuminated ATC/ESP lamp.

Differential Braking

Differential braking within ATC is automatically activated

when drive wheel(s) on one side of the vehicle are spinning

excessively. This typically occurs on road surfaces

with patches of ice. The traction system will then lightly

apply the brake to the drive wheel(s) that are spinning

excessively. The vehicle differential will then drive the

wheels on the other side of the vehicle.

Differential braking (as part of ATC functionality) is available

at vehicle speeds up to 25 mph/40 kph.

Disabling ATC Differential Braking

ATC differential braking is disabled under the following

conditions:

1. During power up (e.g. when the vehicle is started), until

the ECU detects a service brake application.

2. If the ECU receives a J1939 message indicating that

the vehicle is parked.

3. When the dynamometer test mode is active. The

Dynamometer test mode is entered using the diagnostic

Blink Code Switch or by using a diagnostic tool (such

as Bendix® ACom® Diagnostics).

4. In response to a serial communications request from

a diagnostic tool.

5. If ATC Differential Braking function is activated for a

long time period to avoid overheating of the brakes. It

would take approximately three (3) continuous minutes

of activation for the time‑out to occur. Once timed‑out,

approximately two (2) minutes of "cool off" time would

be required before ATC Differential Braking can be used

again.

6. When certain DTC conditions are detected.

Traction Control with Engine Torque Limiting

The Bendix ESP EC‑80 Controller uses Engine Torque

Limiting to control drive‑axle wheel slip. This is commu‑

nicated to the engine control module (using J1939), and

is available at all vehicle speeds.

Bendix® SMART ATC™ System

The Bendix ESP EC‑80 Controller has an additional feature

known as the Bendix® SMART ATC™ system. This system

monitors the accelerator pedal position (using J1939)

to help provide optimum traction and vehicle stability.

By determining the driver’s throttle input and adapting the

target slip of the drive wheels to the driving situation, the

Bendix SMART ATC system allows higher wheel slip when

the accelerator pedal is applied above a preset level.

The wheel slip allowed by the Bendix SMART ATC system

is decreased when driving through a curve for improved

stability.

Disabling ATC Engine Control and the Bendix

SMART ATC System

ATC Engine Control and the Bendix SMART ATC system

will be disabled under the following conditions:

1. In response to a serial communications request from

an off‑board tool;

2. At power‑up until the ECU detects a service brake

application;

3. If the ECU receives a J1939 message indicating that

the vehicle is parked;

4. If the dynamometer test mode is active. This may be

accomplished via an off‑board tool or the diagnostic

Blink Code Switch; or

5. When certain DTC conditions are detected.

12

Optional ATC Mud/Snow (Off-Road) Mode

In some road conditions, the vehicle operator may desire

additional drive wheel slip when ATC is active. The Bendix®

ESP® EC‑80™ Controller has an optional control mode to

permit this desired performance.

The vehicle operator can activate the Mud/Snow function

with a switch on the dash panel. Alternately, a J1939

message may be used to place the vehicle in this mode.

The ATC/ESP Indicator Lamp will ash steadily at a rate

of once every 2.5 seconds to conrm that the ATC mud/

snow mode is engaged.

To exit the ATC Mud/Snow mode, depress and release the

ATC Mud/Snow switch.

Drag Torque Control Functional Overview

Bendix ESP EC‑80 Controllers have a feature referred to

as drag torque control which reduces wheel slip on a driven

axle due to driveline inertia. This condition is addressed

by increasing the engine torque to overcome the inertia.

Drag torque control increases vehicle stability on low‑

traction road surfaces during down‑shifting or retarder

braking.

FIGURE 13 - YAW CONTROL EXAMPLE

A Real World Example Of How Yaw Control

Operates:

Excessive speed exceeds the threshold, creating a

situation where a vehicle is likely to spin and jackknife.

The Bendix® Yaw Control system reduces engine throttle

and selectively applies brakes to reduce the tendency

to jackknife.

FIGURE 12 - RSP EXAMPLE

A Real World Example

Of How The RSP

System Operates:

Excessive speed for road

conditions creates forces

that exceed the threshold

at which a vehicle is likely

to rollover on a higher‑

friction surface.

The system automatically reduces

engine torque and applies the

service brakes (based on the

projected rollover risk) to reduce

the vehicle speed, thereby

reducing the tendency to roll over.

BENDIX ESP EC-80 ABS WITH STABILITY

CONTROL

Overview

The Bendix ESP system with the EC‑80 Controller reduces

the risk of rollovers, jackkning and other loss‑of‑control

events. Bendix ESP EC‑80 Controllers include Roll

Stability Program (RSP®) and Yaw Control (YC) functions.

During operation, the Bendix ESP EC‑80 Controller

constantly compares performance models to the vehicle’s

actual movement, using wheel speed sensors; a lateral

acceleration sensor, a yaw rate sensor, and a steering

angle sensor. If the vehicle shows a tendency to leave an

appropriate travel path, or if critical threshold values are

approached, the system will intervene to assist the driver.

13

Bendix® Roll Stability Program (RSP®)

Bendix RSP — an element of the overall Bendix® ESP®

system with the EC‑80™ Controller — addresses rollover

conditions. In the case of a potential roll event, the ECU

will override the throttle and quickly apply brake pressure

at all wheel ends to slow the vehicle combination. The

level of braking application during an RSP event will be

proportional to roll risk. See Figure 12.

Yaw Stability

Yaw stability counteracts the tendency of a vehicle to spin

about its vertical axis. During operation — if the friction

between the road surface and the tires is not sufcient

to oppose lateral (side) forces — one or more of the tires

can slide, causing the truck/tractor to spin. These events

are referred to as either an "under‑steer" situation (where

there is a lack of vehicle response to steering input due to

tire slide on the steer axle), or an "over‑steer" (where the

tractor's rear end slides out due to tire slide on the rear axle)

situation. Generally, shorter wheelbase vehicles (tractors,

for instance) have less natural yaw stability, while longer

wheelbase vehicles (straight trucks, for instance) have

greater natural yaw stability. Factors that inuence yaw

stability are: wheelbase, suspension, steering geometry,

weight distribution front to rear, and vehicle track width.

Yaw Control

Yaw control responds to a wide range of low‑ to high‑

friction surface scenarios including rollover, jackknife

and loss‑of‑control. It is the recommended system for all

power vehicles and especially critical for tractors pulling

trailers. In the case of vehicle slide (over‑steer or under‑

steer situations), the system will reduce the throttle and

then brake one or more of the “four corners” of the vehicle

(in addition to potentially applying the trailer brakes), thus

applying a counter‑force to better align the vehicle with an

appropriate path of travel.

For example, in an over‑steer situation, the system applies

the “outside” front brake; while in an under‑steer condition,

the “inside” rear brake is applied. (See Figure 13)

IMPORTANT SAFETY INFORMATION

ABOUT THE BENDIX® ESP® SYSTEM

The Bendix ESP EC-80 Controller may reduce

the vehicle speed automatically.

The Bendix® ESP® system can make the

vehicle decelerate automatically and can

slow the vehicle with or without the operator

applying the brake — and even when the

throttle is being applied.

To minimize unexpected deceleration and reduce the

risk of a collision, the operator must:

• Avoid aggressive driving maneuvers, such as sharp

turns or abrupt lane changes at high speeds, which

might trigger the stability system; and

• Always operate the vehicle safely, drive defensively,

anticipate obstacles and pay attention to road,

weather and trafc conditions. Bendix ABS, ATC

and ESP systems are no substitute for prudent,

careful driving.

Towing Doubles Or Triples May Reduce The

Effectiveness Of Stability Systems

The Bendix ESP system with the EC-80 Controller is

designed and optimized for trucks and for tractors that

tow single trailers. If a tractor equipped with Bendix

ESP is used to power multiple trailer combinations

(known as “doubles” or “triples”) the effectiveness

of the Bendix ESP system may be greatly reduced.

Extremely careful driving is always required when

towing doubles or triples. Excessive speed and

aggressive maneuvers — such as sharp turns, sudden

steering inputs, or abrupt lane changes — should be

avoided.

Limitations Of Stability Systems

The effectiveness of the Bendix ESP system with the

EC‑80 Controller may be greatly reduced if:

• The load shifts due to improper retention, accident

damage, or the inherently mobile nature of some loads

(for example, hanging meat, live animals or partially

laden tankers),

• The vehicle has an unusually high — or off‑set — center

of gravity (CG),

• One side of the vehicle drops off the pavement at an

angle that is too large to be counteracted by a reduction

in speed,

• The vehicle is used to haul double or triple trailer

combinations,

• If very rapid steering changes are attempted at high

speeds,

• There are mechanical problems with suspension

leveling of the tractor or trailer resulting in uneven loads,

• The vehicle is maneuvering on a high banked road

creating either additional side forces due to the weight

(mass) of the vehicle, or a deviation between expected

& actual yaw rates,

• Gusty winds are strong enough to cause signicant

side forces on the vehicle and any towed vehicles.

14

To Maximize The Effectiveness Of The Bendix®

ESP® System with the EC-80™ Controller:

• Loads must be properly secured at all times.

• Drivers need to exercise extreme caution at all times,

plus avoid sharp turns, sudden steering adjustments

or abrupt lane changes at high speeds, particularly if:

› the vehicle hauls loads that could shift;

› the vehicle or load has a high or off‑set center of

gravity (CG) when loaded; or

› the vehicle tows doubles or triples.

Truck Chassis Modications

If the vehicle’s chassis components are altered (for

example, a wheel base extension or reduction; tag

axle addition or removal; a major body change such as

conversion of a tractor into a truck; or an axle, suspension,

or steering system component modication) the Bendix®

ESP® system must be disabled. Have a qualied mechanic

replace the Bendix ESP EC‑80 Controller with a Bendix®

ESP® ATC EC‑80™ Controller and secure the X4 connector

(which will no longer be used). The ATC/ESP indicator

lamp would continue to function as an ATC indicator lamp,

and should be designated as ATC only.

If a modied vehicle does not have the Bendix®

ESP® system disabled, serious vehicle braking

and performance issues could result, including

unnecessary ESP system interventions. This can

lead to a loss-of-control of the vehicle.

In addition, remove all cab signage (e.g. visor

labels, etc.) that were used to show that the Bendix

ESP system was installed. Make any necessary

notations in the vehicle manual(s), so that drivers do

not misunderstand which ABS options are installed

on the vehicle.

Sensor Location Modications

The location and orientation of the Steering Angle Sensor

and Yaw Rate Sensor must not be altered. When servicing,

an identical component must be used in the same

orientation (using OEM brackets & torque requirements).

During installation follow the OEM leveling guidelines.

Steering Angle Sensor Re-Calibration

Whenever maintenance or repair work is performed to the

steering mechanism, linkage, steering gear, adjustment of

the wheel track, or if the steering angle sensor is replaced,

a recalibration of the Steering Angle Sensor must be

performed.

If the Steering Angle Sensor is not recalibrated, the

yaw control system may not function properly, which

can result in incidents leading to loss of vehicle

control. See page 19 of this document for more

details on this procedure.

DYNAMOMETER TEST MODE

Bendix ATC and ESP systems must be disabled prior

to conducting any dynamometer testing. When the

Dynamometer Test Mode is engaged, the Bendix ATC

EC‑80 Controller's brake control and engine control —

along with drag torque control and Bendix ESP system

functions — are disabled. This test mode is used to avoid

torque reduction or torque increase and brake control

activation when the vehicle is operated on a dynamometer

for testing purposes.

The Dynamometer Test Mode may be activated by pressing

and releasing the diagnostic Blink Code Switch ve times

or by using a hand‑held or PC‑based diagnostic tool.

During Dynamometer Test Mode the ATC lamp remains ON.

Bendix ESP EC‑80 Controllers will remain engaged in

the Dynamometer Test Mode even if power to the ECU

is removed and re‑applied. To exit the test mode, press

and release the Blink Code Switch three times, or use a

hand‑held or PC‑based diagnostic tool.

AUTOMATIC TIRE SIZE CALIBRATION

The ECU requires a precise rolling circumference ratio

between steer axle and drive axle tires in order for the

Bendix ABS, ATC, and ESP systems to perform in an

optimal manner. For this reason, a continuously monitoring

process takes place in which the precise ratio is calculated.

This calculated value is stored in the ECU memory

provided the following conditions are met:

1. Rolling‑circumference ratio is within the permissible

range;

2. Vehicle speed is greater than approximately

12 mph/19 kph;

3. No acceleration or deceleration is taking place; and

4. There are no active speed sensor Diagnostic Trouble

Codes (DTCs).

The ECU is provided with a ratio value of 1.00 as a default

setting. If the automatic tire size alignment calculates a

different value, this is used to overwrite the original gure

in the memory. This process adapts the ABS and ATC

function to the vehicle.

15

Acceptable Tire Sizes

The speed calculation for an exciter ring with 100 teeth

is based on a default tire size of 510 revolutions per mile.

This gure is based on the actual rolling circumference of

the tires, which varies with tire size, tire wear, tire pressure,

vehicle loading, etc.

The ABS response sensitivity is reduced when the actual

rolling circumference is excessive on all wheels. For a 100

tooth exciter ring, the minimum number of tire revolutions

per mile is 376, and the maximum is 665. The ECU will

set a Diagnostic Trouble Code (DTC) if the number of

revolutions is out of this range.

In addition, the size of the steer axle tires compared to

the drive axle tires also has to be within the ABS system

design. To avoid DTCs, the ratio of the effective rolling

circumference of the steer axle, divided by the effective

rolling circumference of the drive axle, must be between

0.85 to 1.15.

The Bendix® ESP® system with the EC-80 Controller

effectiveness relies on the accuracy of vehicle speed.

If a major change on the tire sizes is made — such that

the odometer setting needs to be changed to correct

for the new tires — the Bendix ESP EC-80 Controller's

setting of tire sizes must also be reprogrammed to

revised values.

SYSTEM IMPACT DURING ACTIVE

DIAGNOSTIC TROUBLE CODES (DTCs)

ABS PARTIAL SHUTDOWN

Depending on which component the DTC is detected,

the Bendix ABS, ATC, and ESP system functions may

be fully or partially disabled. Even with the ABS indicator

lamp illuminated, the Bendix ESP EC‑80 Controller may

still provide ABS function on wheels that are not affected.

The ABS system Controller should be serviced as soon

as possible.

Steer Axle ABS Modulator DTC

ABS on the affected wheel is disabled. ABS and ATC on

all other wheels remains active. The Bendix ESP system

with the EC‑80 Controller is disabled.

Drive Axle/Additional Axle ABS Modulator DTC

ATC is disabled. ABS on the affected wheel is disabled.

ABS on all other wheels remains active. The Bendix ESP

EC‑80 system is disabled.

Steer Axle Wheel Speed Sensor DTC

The wheel with the DTC is still controlled by using input

from the remaining wheel speed sensor on the steer axle.

ABS remains active on the rear wheels. The Bendix ATC

and ESP systems are disabled.

Drive Axle/Additional Axle Wheel Speed Sensor

DTC

The Bendix ATC and ESP systems are disabled. In a four

sensor system, ABS on the affected wheel is disabled, but

ABS on all other wheels remains active.

In a six sensor system, ABS remains active by using input

from the remaining rear wheel speed sensor on the same

side.

ATC Modulator DTC

The Bendix ATC and ESP systems are disabled. ABS

remains active.

J1939 Communication DTC

The Bendix ATC and ESP systems are disabled. ABS

remains active.

ECU DTC

The Bendix ABS, ATC, and ESP systems are disabled.

The system reverts to normal braking.

Voltage DTC

While voltage is out of range, Bendix ABS, ATC, and ESP

systems are disabled. The system reverts to normal

braking. When the correct voltage level is restored, full

ABS and ATC function is available. The operating voltage

range is 9.0 to 17.0 VDC for 12 volt systems, and 20 to 33.5

volts for 24 volt systems.

Steering Angle Sensor DTC

The Bendix ESP system is disabled. Bendix ABS and ATC

systems remain active.

Yaw Rate/Lateral Acceleration Sensor DTC

The Bendix ESP system is disabled. Bendix ABS and ATC

systems remain active.

Brake Demand Pressure Sensor DTC

The Bendix ESP system is disabled. Bendix ABS and ATC

systems remain active.

Load Sensor DTC

The Bendix ESP system is disabled. Bendix ABS and ATC

systems remain active.

Steer Axle Traction Control Valve (TCV) DTC

The Bendix ESP system is disabled. Bendix ABS and ATC

systems remain active.

Trailer Pressure Modulator Valve (PMV) DTC

The Bendix ESP system is disabled. Bendix ABS and ATC

systems remain active.

16

SYSTEM RECONFIGURATION

The Bendix® ESP® EC‑80™ Controller is designed to

allow the technician to change the default system settings

(chosen by the vehicle OEM) to provide additional or

customized features.

Depending on the model, the customizable features include

ABS control settings, engine module communication etc.

Many of these settings can be recongured using a hand‑

held or PC‑based software, such as the Bendix® ACom®

Diagnostic software.

ECU RECONFIGURATION

Reconguring a Bendix ESP EC‑80 Controller may be

carried out by using the Blink Code Switch or by using a

hand‑held or PC‑based diagnostic tool.

Note: During the reconfiguration process — and

independently from any reconguration being carried out

by the technician — the Electronic Control Unit (ECU) will

automatically check the J1939 serial link and communicate

with other vehicle modules. In particular, if the serial link

shows that the vehicle has a retarder device present, the

ECU will congure itself to communicate with the retarder

device for improved ABS performance. For example, if

the ECU detects the presence of a retarder disable relay

during a reconguration, it will congure itself to control the

relay to disable the retarding device as needed.

Reconguration Using the Blink Code Switch

With ignition power removed from the Bendix ESP EC‑80

Controller, depress the Blink Code Switch. After the

ignition power is activated, depress and release the switch

seven (7) times to initiate a reconguration event.

Diagnostic Tool

A reconguration event may be initiated using a hand‑held

or PC‑based diagnostic tool to communicate with the ECU

over the SAE J1939 diagnostic link.

6S/5M Conguration

A Bendix ESP EC‑80 Controller will congure for 6S/5M

operation when a reconguration event is initiated, and the

ECU detects that an additional‑axle Pressure Modulating

Valve (PMV) is wired as follows:

PMV Connector ECU Connector

Hold Right Additional Axle Hold

Release Left Additional Axle Release

Common Right Additional Axle Common

DATA STORAGE

Depending on the product type and version, Bendix®

brand ECUs may store data related to troubleshooting,

diagnostics, service needs, vehicle system operating

status, and vehicle operator inputs. No personally

identifying data (e.g. name, gender or age) is recorded.

Bendix will not access stored ECU data or share it with

others except: with the consent of the vehicle owner; in

response to an ofcial request by law enforcement or

other governmental agency; as part of Bendix’s defense

of litigation; or, as otherwise required by law. Data that

Bendix receives may also be used for research purposes

or made available to others for research purposes, where

a need is shown and the data is not linked to a specic

vehicle or owner.

Bendix brand antilock ECUs are not designed to store

data for purposes of accident reconstruction and Bendix

ACom Diagnostic Software is not intended to retrieve data

for purposes of accident reconstruction. Bendix makes no

representations as to the accuracy of data retrieved and

interpreted from Bendix ECUs for purposes of accident

reconstruction.

17

GENERAL SAFETY GUIDELINES

Read and follow the General Safety Guidelines shown on

page two (2) of this document.

REMOVAL OF THE BENDIX® ESP® EC-80™

CONTROLLER ASSEMBLY

1. Turn vehicle ignition off.

2. Remove as much contamination as possible prior to

disconnecting electrical connections.

3. Note the Bendix ESP EC‑80 Controller assembly

mounting position on the vehicle.

4. Disconnect the electrical connectors from the Controller.

5. Remove and retain the mounting bolts that secure the

Controller.

The VIN of the vehicle is stored in the Bendix ESP

EC-80 Controller's internal memory, and is cross-

checked by the Electronic Control Unit (ECU) using

information obtained from other vehicle Controller(s).

If the VIN stored in the ECU does not match the VIN

obtained from the other vehicle Controller(s), the ECU

will generate an ECU Internal VIN Mismatch Diagnostic

Trouble Code (DTC).

Accordingly, do not attempt to move a Bendix ESP

EC-80 Controller from one vehicle to another.

OBTAINING A NEW BENDIX® ESP® EC-80™

CONTROLLER

Should the Bendix ESP EC‑80 Controller require

replacement, certain steps must be followed:

1. Record the vehicle model, VIN, year and date of

manufacture from the vehicle.

2. Record the part number of the Bendix ESP EC‑80

Controller.

3. Provide this information to your local OEM vehicle

service department to obtain a new Bendix ESP EC‑80

ECU. The OEM service department will install the same

parameter set in the new Controller that was loaded into

the original ECU at the vehicle OEM assembly facility.

INSTALLING A NEW BENDIX ESP EC-80

CONTROLLER

When replacing the Bendix ESP EC-80 Controller,

verify with the OEM service department that the unit

you are installing has the correct parameter set.

Failure to do so could result in a loss of features or

degraded ESP performance.

For further information, contact either the vehicle

manufacturer, Bendix, or your local authorized Bendix

distributor.

1. Position and secure the Bendix ESP EC‑80 Controller

in the original mounting orientation using the mounting

bolts retained during removal. Use no more torque than

is necessary to rmly secure the ECU into position.

Over‑tightening the mounting hardware can cause

damage to the Bendix ESP EC‑80 Controller.

2. Reconnect the electrical connectors to the Bendix

EC‑80 Controller.

3. Apply power and monitor the Bendix ESP EC‑80

Controller power‑up sequence to Verify the proper

system operation.

See Troubleshooting: Wiring section beginning on page 45

for more information on wire harnesses.

The Bendix ESP system with the EC-80 Controller is

validated with specic Bendix® brand components.

Always use Bendix brand replacement parts to

prevent compromising system performance.

Bendix is not able to validate the safe and reliable

use of substitute or alternate components that

may be available from other manufacturers, since

suppliers of a non-Bendix brand ABS component

may implement design changes in their component

(without the knowledge or approval of Bendix) which

could negatively affect antilock system reliability

and braking performance issues.

Troubleshooting: General

18

STEERING ANGLE SENSOR MAINTENANCE

Service Checks:

1. Check all wiring and connectors. Some installations

also include an intermediate connector from the

steering angle sensor to the main vehicle wire harness.

Make sure all connections are free from visible damage.

2. Examine the sensor. Make sure the sensor, its

mounting screws, and the interface between the hub

and the steering column are not damaged.

Diagnostics:

The Bendix® brand steering angle sensor is only operational

in conjunction with a Bendix® ESP® EC‑80™ Controller. No

independent diagnostics can be performed on the sensor.

See pages 38-39 for Diagnostic Trouble Codes (DTCs)

associated with this device.

Removal:

1. Remove steering column sheathing.

2. Depending upon manufacturer, the steering angle

sensor could be located either near the steering wheel,

necessitating the removal of the steering wheel, or

near the joint to the vehicle steering mechanism,

necessitating the disconnection of this linkage.

3. Unplug sensor cable assembly from body of sensor.

Squeeze the mounting tabs and pull gently on the

connector until it disengages.

4. Unscrew all three of the mounting screws that hold the

body of the sensor to the steering column body.

5. Slide the sensor over the column to remove. Take note

if the sensor label is facing upward or downward.

Installation:

1. Obtain a new sensor. The sensor is not repairable in

the eld.

2. Slide the sensor over the column. The center hub of the

sensor must be aligned with the corresponding notch

in the column. Different column manufacturers may

implement this hub alignment in different ways. The

sensor label should be facing in the same direction as

the removed sensor.

3. Assemble to column non‑moving plate with three self‑

locking screws.

4. Tighten screws to steering column manufacturer's

recommended torque specication.

5. Reconnect the connector. Ensure that there will be no

force applied to the sensor because the connector is

pulling on the sensor body.

6. If the wire harness leading to the sensor is being

replaced, ensure that it is adequately tie wrapped

so that the full motion of the steering column can be

achieved without pulling apart the connectors.

7. Reinstall the column sheathing. The sensor is not

protected against dirt or water intrusion, so care

must be taken not to introduce these elements during

installation.

STEERING ANGLE SENSOR CALIBRATION

The steering angle sensor calibration can only be achieved

when the sensor is powered by the Bendix ESP EC‑80

Controller. No stand‑alone sensor calibration can be

carried out. The calibration procedure is performed

using Bendix® ACom® Diagnostic software V6.7.2.5 or

higher. See “Troubleshooting Diagnostic Trouble Codes:

Steering Angle Sensor (Bendix® SAS-60™)” for the

calibration procedure using this tool. The sensor must be

recalibrated using ACom Diagnostic Software after any of

these situations:

• Replacement of the steering angle sensor;

• Any opening of the connector hub from the steering angle

sensor to the column;

• Any maintenance or repair work on the steering linkage,

steering gear or other related mechanism;

• Adjustment of the wheel alignment or wheel track; or

• After an accident that may have led to damage of the

steering angle sensor or assembly

If the steering angle sensor is not properly

recalibrated as needed, the yaw control system may

not function properly, which can result in a loss of

vehicle control.

19

YAW RATE/LATERAL ACCELERATION

SENSOR MAINTENANCE

Different generations of yaw rate/lateral acceleration

sensors are not compatible. Only replace these

sensors with exactly the same device.

Service Checks:

1. Check all wiring and connectors. Make sure all

connections are free from visible damage.

2. Examine the sensor. Make sure the sensor, its

mounting bolts, and the mounting bracket are not

damaged.

3. Check the vent hole in underbody of sensor housing.

The vent hole should remain free from paint and debris

at all times.

Diagnostics:

The yaw rate sensor is only operational in conjunction with

a Bendix® ABS, ATC or ESP® system with the EC‑80™

Controller. No independent diagnostics can be performed

on the sensor. See pages 40-41 for Diagnostic Trouble

Codes associated with this device.

Removal:

1. Unplug the sensor cable assembly from body of sensor.

The connector must be twisted and pulled gently to

release.

2. In some mounting congurations, the sensor can be

removed independently from its mounting bracket.

Otherwise, remove entire assembly, then remove

sensor from bracket.

3. Take note of the direction in which the connector is

pointed.

Installation:

1. Obtain a new sensor. The sensor is not repairable in

the eld.

The location of the Yaw Rate Sensor on the vehicle,

the means of fastening the unit to the vehicle, and

the sensor's orientation, MUST NOT BE ALTERED.

When servicing, an identical component must be

used in the same orientation (using OEM brackets

& torque requirements). During installation,

follow the OEM leveling guidelines. If any of these

requirements are not followed, the Bendix ESP

system may not function properly, which can result

in incidents leading to loss of vehicle control.

2. Assembly yaw rate sensor housing to mounting bracket.

The bracket must be the same design as used on the

original vehicle conguration.

3. For Bendix® YAS‑60™ Yaw Rate Sensors, the correct

fasteners are three M8 size bolts, and the xing torque

should be 20 Nm (±2 Nm). For Bendix® YAS‑70X™ Yaw

Rate Sensors, the correct fasteners are two M10 size

bolts (1.5 mm pitch angle), or OEM‑supplied hardware,

and the xing torque should be 46 Nm (±9 Nm). Note

that the Bendix YAS‑70X sensor has two alternate

designs, one with an aligning post — see the kit

instruction sheet for more information. In all cases,

the connector should be facing in the same direction

as the removed sensor. The unit must not be installed

upside‑down where there is a pressure‑balancing hole.

4. The sensor should be as level as possible and parallel

to the road surface when installed on the vehicle.

5. Reconnect the connector. Ensure that there will be no

force applied to the sensor because the connector is

pulling on the sensor body.

When removing or installing the sensor, care must

be used to prevent damage. Do not strike or pry

the sensor. Do not use an impact tool to install the

mounting hardware.

Sensor Location Modications

The location and orientation of the Yaw Rate Sensor must

not be altered. When servicing, an identical component

must be used in the same orientation (using OEM brackets

& torque requirements). During installation follow the OEM

leveling guidelines.

Yaw Rate Sensor Calibration:

The yaw rate sensor calibration can only be achieved via

the Bendix ESP system with the EC‑80 Controller. The

sensor must be recalibrated after any of these situations:

• Replacement of the sensor

• After an accident that may have led to damage of the

yaw rate sensor

The calibration procedure is performed using Bendix®

ACom® Diagnostic Software V6.7.2.5 or higher.

See “Troubleshooting Diagnostic Trouble Codes: Yaw Rate

Sensor” for the calibration procedure.

20

BRAKE DEMAND SENSOR CALIBRATION

Calibration must be performed under the following conditions:

• After servicing any pressure sensor related Diagnostic

Trouble Codes (DTCs)

• Replacement of any sensor

The calibration procedure is performed using Bendix®

ACom® Diagnostic Software V6.7.2.5 (or higher).

See “Troubleshooting Diagnostic Trouble Codes: Brake

Demand Sensor/Load Sensor” for the calibration procedure.

PRESSURE SENSOR INSTALLATION

REQUIREMENTS

Service Checks:

1. Check all wiring and connectors. Make sure all

connections are free from visible damage.

2. Examine the sensor. Make sure the sensor and its

interface to the pressure location are not damaged.

Diagnostics:

See the test diagram supplied by the Bendix ACom

Diagnostic Software. The pressure sensor can be

independently diagnosed when supplied with a ve volt

voltage supply to the B location and ground to the A

location shown in the test diagram. Signal output on

the C location should read approximately 0.5V if there is

no pressure applied. The signal output should increase

proportionately as pressure is applied, up to a maximum

of 4.5V at 150 psi.

Removal:

1. Unplug sensor cable assembly from body of sensor.

Pull gently on the mounting tab and connector until it

disengages.

2. Remove sensor from its pressure mounting using

approved air brake push in tting tools.

Installation:

1. Obtain a new sensor. The sensor is not repairable in

the eld.

2. Insert sensor into pressure tting using approved tools.

3. Reconnect the connector. Ensure that there will be no

force applied to the sensor because the connector is

pulling on the sensor body.

4. If the wire harness leading to the sensor is being

replaced, ensure that it is adequately tie wrapped.

Pressure Sensor Calibration:

There is no need for pressure sensor calibration as long

as the part replaced is identical to the part removed and a

component approved for use with the Bendix® ESP® system

with EC‑80™ Controllers. However, replacement of brake

demand sensors or clearing of demand pressure sensor

related DTCs require the following:

1. Use Bendix ACom Diagnostic Software V6.7.2.5 (or

higher) to clear the active pressure sensor DTC.

2. Carrying out the demand pressure sensor initialization

procedure which involves applying service brakes of

90 psi or greater for three (3) seconds (while stationary).

Once this procedure is carried out successfully, if there are

no other active DTCs, the ATC/ESP indicator lamp will no

longer be illuminated.

21

BLINK CODES

Blink codes allow a technician to troubleshoot ABS

problems without using a hand‑held or PC‑based

diagnostic tool. Instead, information about the ABS system

is communicated by the Bendix ESP EC‑80 Controller using

the ABS indicator lamp to display sequences of blinks.

Note: The Bendix ESP EC-80 Controller will not enter the

diagnostic blink code mode if the wheel speed sensors

show that the vehicle is in motion. If the ECU is in the

diagnostic blink code mode and then detects vehicle

motion, it will exit the blink code mode.

In addition, by operating the Blink Code Switch as

described below, one of several diagnostic modes can be

entered. See Diagnostic Modes below.

Blink Code Switch Activation

When activating the Blink Code Switch:

1. Wait at least two seconds after “ignition on.” (Except

when entering Reconguration Mode ‑ see System

Reconguration section on page 16.)

2. For the Bendix ESP EC‑80 Controller to recognize that

the switch is activated “on,” the technician must press

for at least 0.1 seconds, but less than ve (5) seconds.

(If the switch is held for more than ve (5) seconds, the

ECU will register a malfunctioning switch.)

3. Pauses between pressing the switch when a sequence

is required, (e.g. when changing mode) must not be

longer than two (2) seconds.

4. After a pause of three‑and‑a‑half (3.5) seconds, the

ECU will begin responding with output information

blinks. See Figure 15 for an example.

ELECTRONIC CONTROL UNIT (ECU)

DIAGNOSTICS

The Bendix® ESP® EC‑80™ Controller contains self‑testing

diagnostic circuitry that continuously checks for the normal

operation of internal components and circuitry, as well as

external ABS components and wiring.

Active Diagnostic Trouble Codes (DTCs)

When an erroneous system condition is detected, the

Bendix ESP EC‑80 Controller:

1. Illuminates the appropriate indicator lamp(s) and

disengages part or all of the Bendix ABS, ATC and

ESP system functions. (See ABS Partial Shutdown,

on page 15.);

2. Places the appropriate DTC information in the Electronic

Control Unit (ECU) memory; and

3. Communicates the appropriate DTC information over

the serial communications diagnostic link as required.

Hand‑held or PC‑based diagnostic tools attach to the

vehicle diagnostic connector, typically located on or

under the dash (see Figure 14).

FIGURE 14 - TYPICAL VEHICLE DIAGNOSTIC

CONNECTOR LOCATIONS (J1939)

Troubleshooting: Blink Codes and Diagnostic Modes

FIGURE 15 - EXAMPLE OF A BLINK CODE MESSAGE

22

Blink Code Timing

The Bendix® ESP® EC‑80™ Controller responds with

a sequence of blink codes. The overall blink code

response from the Electronic Control Unit (ECU) is called

a “message.” Each message includes, depending on the

mode selected by the technician, a sequence of one or

more groups of blinks. Simply record the number of blinks

for each sequence and then use the troubleshooting index

on page 26 for active or inactive Diagnostic Trouble Codes

(DTCs) and you will be directed to the page that provides

troubleshooting information.

NOTE:

1. Sequences of blinks illuminate the ABS indicator lamp

for half a second, with half‑second pauses between

them.

2. Pauses between blink code digits are one‑and‑a‑half

(1.5) seconds.

3. Pauses between blink code messages are two‑and‑a‑

half (2.5) seconds.

4. The lamp remains on for ve (5) seconds at the end of

messages.

Once the ABS indicator lamp begins displaying a sequence

of codes, it continues until all blink code messages have

been displayed and then returns to the normal operating

mode. During this time, the Bendix ESP EC‑80 Controller

will ignore any additional Blink Code Switch activation.

All DTCs, with the exception of voltage and J1939 DTCs,

will remain in an active state for the remainder of the

power cycle.

Voltage DTCs will clear automatically when the voltage

returns within the required limits. All Bendix ABS functions

will be re‑engaged.

J1939 DTCs will clear automatically when communications

are re‑established.

DIAGNOSTIC MODES

In order to communicate with the Bendix ESP EC‑80

Controller, there are several modes that the technician can

select to allow information to be retrieved, or other ECU

functions to be accessed.

Diagnostic Modes

To enter the various diagnostic modes:

No. of

Times to

Press the

Blink Code

Switch

System Mode Entered

1Active Diagnostic Trouble Code (DTC) Retrieval

2Inactive DTC Retrieval

3Clear Active DTCs

4System Conguration Check

5Dynamometer Test

7* Recongure ECU

* To enter the Reconguration Mode, the switch must be held

in before the application of ignition power. Once the power is

supplied, the switch is released and then pressed seven times.

FIGURE 16 - DIAGNOSTIC MODES

Active Diagnostic Trouble Code Mode

For troubleshooting, typically the Active and Inactive

DTC Retrieval Modes are used. The technician presses

the Blink Code Switch once and the ABS indicator lamp

ashes a rst group of two codes, and if there are more

DTCs recorded, this is followed by a second set of codes,

etc. (See page 26 for a directory of these codes.) All

active DTCs may also be retrieved using a hand‑held or

PC‑based diagnostic tool, such as the Bendix® ACom®

Diagnostic Software.

To clear active DTCs (as problems are xed), simply

clear (or “self‑heal”) by removing and re‑applying ignition

power. The only exception is for wheel speed sensor

DTCs, which clear when power is removed, re‑applied, and

the ECU detects valid wheel speed from all wheel speed

sensors. Alternately, codes may be cleared by pressing the

diagnostic Blink Code Switch three (3) times (to enter the

Clear Active Diagnostic Trouble Code Mode) or by using

a hand‑held or PC‑based diagnostic tool. Hand‑held or

PC‑based diagnostic tools are able to clear wheel speed

sensor DTCs without the vehicle being driven.

23

Inactive Diagnostic Trouble Code Mode

The Bendix® ESP® EC‑80™ Controller stores past

Diagnostic Trouble Codes (DTCs) and comments (such

as conguration changes) in its memory. This record is

commonly referred to as “event history.” When an active

DTC is cleared, the Electronic Control Unit (ECU) stores it

in the event history memory as an inactive DTC.

Using blink codes, the technician may review all inactive

DTCs stored on the ECU. The ABS indicator lamp

will display inactive diagnostic blink codes when the

diagnostic Blink Code Switch is depressed and released

two times. See page 26 for the index showing DTCs and

the troubleshooting guide page to read.

Inactive DTCs, and event history, may be retrieved and

cleared by using a hand‑held or PC‑based diagnostic tool,

such as the Bendix® ACom® Diagnostic Software.

Clearing Active DTCs

The ECU will clear active DTCs when the diagnostic Blink

Code Switch is depressed and released three (3) times.

System Conguration Check Mode

The ABS indicator lamp will display system conguration

information when the diagnostic Blink Code Switch is

depressed and released four times. The lamp will blink

out conguration information codes using the following

patterns. (See Figure 17).

In this mode the ECU tells the technician — by means of a

series of seven (7) blink codes — the type of ABS system

that the ECU has been set up to expect. For example, if

the fourth blink code is the number two (2), the technician

knows that a 6S/4M sensor/modulator conguration has

been set.

Dynamometer Test Mode

The Dynamometer Test Mode is used to disable Bendix®

ESP® & ATC system functions when needed (e.g. when

performing any vehicle maintenance where the wheels are

lifted off the ground and moving, including dynamometer

testing). Note: For Bendix ESP and ABS EC‑80

Controllers, this mode will remain engaged even if

power to the ECU is removed and re‑applied. To exit

the Dynamometer Test Mode, press and release the Blink

Code Switch three (3) times, or use a hand‑held or PC‑

based diagnostic tool.

1st Number System Power

112 Volts

2nd

Number

Wheel Speed Sensors

44 Sensors

66 Sensors

3rd Number Pressure Modulator Valves

44 Modulators

55 Modulators

66 Modulators

4th Number ABS Conguration

14S/4M or 6S/6M

26S/4M

36S/5M

5th Number Traction Control Conguration

2No ATC

3ATC Engine Control Only

4ATC Brake Control Only

5Full ATC (Engine Control & Brake Control)

6th Number Retarder Conguration

1No Retarder

2J1939 Retarder

3Retarder Relay

4J1939 Retarder, Retarder Relay

7th Number Stability Conguration

1No Stability Program

2Electronic Stability Program (ESP)

FIGURE 17 - SYSTEM CONFIGURATION CHECK

Recongure ECU Mode

Controller reconfiguration is carried out by using the

Recongure ECU Mode. (See page 16.)

Note: To enter the Reconguration Mode, the Blink Code

Switch must be held in before the application of ignition

power. Once the power is supplied, the switch is released

and then pressed seven times.

Other Methods

Troubleshooting and DTC clearing (as well as recongura‑

tion) may also be carried out using hand‑held or PC‑based

diagnostic tools such as the Bendix® Remote Diagnostic

Unit (RDU™), Bendix ACom Diagnostic Software, or similar

tools.

24

Troubleshooting: Using PC-Based or

Hand-Held Diagnostic Tools

BENDIX® ACOM® DIAGNOSTIC SOFTWARE

FIGURE 18 - BENDIX® ACOM® DIAGNOSTICS

Bendix® ACom® Diagnostic Software is a PC‑based

program and is designed to meet RP‑1210 industry

standards developed by the Truck Maintenance Council

(TMC). This software provides the technician with access

to all the available Bendix® EC‑80™ ESP® Controller's

diagnostic information and configuration capability,

including:

• ECU information;

• Diagnostic Trouble Codes (DTCs) and repair

information;

• Conguration (ABS, ATC, and more);

• Wheel speed information;

• Perform component tests; and

• Save and print information

Note: Bendix ACom Diagnostic Software V6.7.2.5 (or

higher) is required to calibrate the Steering Angle

Sensor, the Yaw Rate/Lateral Acceleration Sensor, the

Brake Demand Sensors and the Load Sensor.

When using ACom Diagnostic Software V6.7.2.5 (or

higher) to diagnose the Bendix ESP EC‑80 Controller, the

computer’s serial or parallel port needs to be connected

to the vehicle’s diagnostic connector.

BENDIX® RDU™ (REMOTE DIAGNOSTIC

UNIT)

The Bendix® RDU™ tool (Bendix part number K101596N001)

provides the technician with a visual indication of Antilock

Braking System (ABS) component Diagnostic Trouble

Code (DTC) information. Note: Previous versions of the

RDU tool are not compatible with the Bendix ESP EC-80

Controller. The Bendix RDU tool is specically designed

for use with Bendix® brand ABS systems and Bendix makes

no claims for its operation and/or usability with other brands

of ABS systems.

LED lights

illuminate

Diagnostic

Trouble

Codes

(10 locations

in total)

FIGURE 19 - THE BENDIX® REMOTE DIAGNOSTIC UNIT

Features of the Bendix RDU Tool

The Bendix RDU tool attaches to the 9‑pin diagnostic

connector in the cab of the vehicle.

The Bendix RDU tool allows the technician to:

• Troubleshoot ABS system component problems using

DTC reporting via LEDs;

• Reset DTCs on Bendix ESP EC‑80 Controllers by

holding a magnet over the reset in the center of the RDU

tool for less than six (6) seconds; and

• Enter the Self‑Conguration Mode used by Bendix ESP

EC‑80 Controllers by holding a magnet over the reset

area for greater than six (6) seconds but less than 30

seconds.

How the Bendix RDU Operates

See Figure 14 for typical vehicle connector locations.

When the Bendix RDU tool is plugged into the diagnostic

connector, all the LEDs will illuminate, and the green LED

will ash four (4) times to indicate communications have

been established.

If the Bendix ESP EC‑80 Controller has no active DTCs,

only the green LED will remain illuminated.

If the Bendix ESP EC‑80 Controller has at least one active

DTC, the RDU tool displays the rst DTC by illuminating the

red LEDs, indicating the malfunctioning ABS component

and its location on the vehicle (See Figure 20.) If there

are multiple DTCs on the ABS system, the RDU tool will

display one DTC rst, then — once that DTC has been

repaired and cleared — the next code will be displayed.

25

Typical Combination

Diagnostic Trouble Codes (DTCs) are:

• Right steer sensor

• Left steer sensor

• Right drive sensor

• Left drive sensor

• Right additional sensor

• Left additional sensor

• Right steer modulator

• Left steer modulator

• Right drive modulator

• Left drive modulator

• Right additional

modulator

• Left additional modulator

• Rear Axle Traction

modulator

• ECU

• Engine serial

communication

• MOD red LED illuminated, shows the "Common"

connection of one or more modulators is shorted to

battery or ground

• VLT (Flashing indicates either over‑ or under‑voltage

condition)

To pinpoint the root cause and to ensure the system

Diagnostic Trouble Code is properly corrected the rst time,

additional troubleshooting may be necessary.

Note: The Bendix® RDU™ tool is not capable of diagnosing

certain Bendix® ESP® EC-80™ system-specific DTCs

including additional sensors: steering angle sensors, yaw

sensors, pressure sensors, or modulator valves (trailer

pressure modulating valves or front axle traction control

valves.)

LED DIAGNOSTIC TROUBLE CODES

LFT ‑ Left

RHT ‑ Right

DRV ‑ Drive Axle

ADD ‑ Additional

STR ‑ Steer Axle

VLT ‑ Power

ECU ‑ ABS Controller

SEN ‑ Wheel Speed

Sensor

MOD ‑ Pressure Modulator

Valve

TRC ‑ Traction Control

Example: If the

Diagnostic Trouble Code

is "Right Steer Axle

Sensor", the Bendix RDU

tool will display one green

and three red LEDs

LEDs

Green

VLT

Red

SEN

STR

RHT

FIGURE 20 - DIAGNOSTIC TROUBLE CODES AS

DISPLAYED ON THE BENDIX® RDU™ TOOL

Bendix® RDU™ Reset Function

The magnetic reset switch is located in the center top of

the Bendix RDU tool. Activation requires a magnet with

30 gauss minimum.

The reset operations are:

1. If the magnet is held over the switch for less than 6

seconds the "clear current DTCs" command is sent.

2. If the magnet is held over the switch for more than 6

seconds, but less than 30 seconds, the Bendix ABS

"self‑conguration command" is sent.

Additionally, it is recommended at the end of any inspection

that the user switches off and restores the power to

the Bendix ESP EC‑80 Controller, then check the ABS

Indicator Lamp operation and Bendix RDU tool to see if

they indicate any remaining DTCs.

Bendix RDU Communication Problems

If the Bendix ESP EC‑80 Controller does not respond to the

RDU tool’s request for DTCs, the RDU tool will illuminate

each red LED in a clockwise pattern. This pattern indicates

the loss of communication and will continue until the Bendix

ESP EC‑80 Controller responds and communication has

been established.

Possible sources of communication problems are:

1. A problem with the J1939 link at the in‑cab off‑board

diagnostic connector (9 or 6 Pin);

2. The Bendix ESP EC‑80 Controller does not support

PID194;

3. No power is being supplied to the Bendix ESP EC‑80

Controller and/or the diagnostic connector;

4. The J1939 bus is overloaded with information and the

RDU can not arbitrate access; or

5. A malfunctioning Bendix RDU tool.

Other Information

For more information on Bendix® ACom® Diagnostics

Software or RP‑1210 compliant tools, go to www.bendix.

com or visit your local authorized Bendix distributor.

See pages 56-62 for Appendices showing J1939 SID, FMI,

codes and their Bendix blink code equivalents.

www.bendix.com

For the latest information, and for free downloads of

the Bendix® ACom® Diagnostic Software, and its User

Guide, visit the Bendix website at www.bendix.com.

Bendix Technical Assistance Team

For direct telephone technical support, call the Bendix

technical assistance team at:

1-800-AIR-BRAKE (1‑800‑247‑2725 option 2, then 1),

Monday through Friday, 8:00 a.m. to 6:00 p.m. ET,

and follow the instructions in the recorded message.

E‑mail the Bendix Technical Assistance Team at:

techteam@bendix.com.

26

Active or Inactive Diagnostic Trouble Codes (DTCs):

INDEX

How to interpret the first digit of messages received

when Active or Inactive Diagnostic Trouble Code Mode

is entered.

1st

Blink

Code

Number

1 ............................... No DTCs (1,1)

2 ............. Wheel Speed Sensors ‑ pages 27‑28

3 ............. Wheel Speed Sensors ‑ pages 27‑28

4 ............. Wheel Speed Sensors ‑ pages 27‑28

5 ............. Wheel Speed Sensors ‑ pages 27‑28

6 ........................Power Supply ‑ page 29

7 ..........Pressure Modulator Valves ‑ pages 30‑31

8 ..........Pressure Modulator Valves ‑ pages 30‑31

9 ..........Pressure Modulator Valves ‑ pages 30‑31

10 .........Pressure Modulator Valves ‑ pages 30‑31

11 ..........................J1939 ‑ pages 32‑33

12 ...................Miscellaneous ‑ pages 34‑35

13 ..............................ECU ‑ page 36

14 ............ Wheel Speed Sensors ‑ pages 27‑28

15 ............ Wheel Speed Sensors ‑ pages 27‑28

16 .........Pressure Modulator Valves ‑ pages 30‑31

17 .........Pressure Modulator Valves ‑ pages 30‑31

18 ....... Drive Axle Traction Control Valve ‑ page 37

19 .......Steer Axle Traction Control Valve ‑ page 37

20 ....Trailer Pressure Modulator Valve ‑ pages 30‑31

21 ............Steering Angle Sensor ‑ pages 38‑39

22 ................ Yaw Rate Sensor ‑ pages 40‑41

23 ............Lateral Acceleration Sensor ‑ page 42

24 ..........Brake Demand/Load Sensors ‑ page 43

25 .................Valves Miscellaneous ‑ page 44

26 ............... J1939 ESP‑Related ‑ page 45‑47

Example: For a message sequence of:

3, 2 12, 4

For the rst sequence go to page 27 and

for the second sequence go to page 34.

Troubleshooting Tests

See Page 56-62 for APPENDIX B: J1939 SPN and FMI Codes and their Bendix Blink Code Equivalents

27

Troubleshooting Diagnostic Trouble Codes (DTCs):

Wheel Speed Sensors

2 Left Steer Axle Sensor

3 Right Steer Axle Sensor

4 Left Drive Axle Sensor

5 Right Drive Axle Sensor

14 Left Additional Axle Sensor

15 Right Additional Axle Sensor

1st. Blink

Code Location

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

1 Excessive Air Gap

Adjust the sensor to contact the exciter ring. Rotate the wheel and verify a minimum

of 0.25 VAC sensor output at ~ 0.5 RPS. Verify the condition of the sensor head.

Verify the mounting of the exciter ring and condition of the teeth. Verify the proper

bearing end‑play. Verify the condition and retention of the clamping sleeve. Verify

the sensor lead routing and clamping.

2 Output Low at

Drive‑off

3Open or Shorted Verify 1500 – 2500 ohms is found across the sensor leads. Verify no continuity between

the sensor leads and ground or voltage. Verify no continuity between the sensor leads

and the other sensors. Check for corroded/damaged wiring or connectors between

the Electronic Control Unit (ECU) and the wheel speed sensor.

4 Loss of Sensor Signal Adjust the sensor to contact the exciter ring. Rotate the wheel and verify a minimum

of 0.25 VAC sensor output at ~ 0.5 RPS. Verify the condition of sensor head. Verify

the mounting of the exciter ring and condition of the teeth. Verify the proper bearing

end‑play. Verify the condition and retention of the clamping sleeve. Verify the sensor

lead routing and clamping. Check for corroded/damaged wiring or connectors between

the ECU and the wheel speed sensor.

5Wheel End Verify the mounting of exciter ring and the condition of teeth. Verify the proper bearing

end‑play. Verify the condition and retention of the clamping sleeve. Verify the sensor

lead routing and clamping. Check the mechanical function of brake. Check for kinked

or restricted air hoses.

6 Erratic Sensor Signal Adjust the sensor to contact the exciter ring. Rotate the wheel and verify a minimum

of 0.25 VAC sensor output at ~ 0.5 RPS. Verify the condition of sensor head. Verify

the mounting of the exciter ring and condition of the teeth. Verify the proper bearing

end‑play. Verify the condition and retention of the clamping sleeve. Verify the sensor

lead routing and clamping. Check for corroded/damaged wiring or connectors between

the ECU and the wheel speed sensor.

7 Tire Size Calibration Verify the correct tire size as desired. Verify the proper tire ination. Verify the correct

number of exciter ring teeth.

10 Conguration Error The ECU is congured for four sensors, but it has detected the presence of additional

sensors. Verify the sensor wiring and the ECU conguration.

28

Cab-mount ECU: Looking into

the wire harness connector

X4

Connector Pin Wheel Speed Sensor

Location

X1

18 Way

10 Right Drive Axle (+)

11 Right Drive Axle (‑)

X2

18 Way

5 Left Steer Axle (+)

8Left Steer Axle (‑)

11 Right Steer Axle (+)

14 Right Steer Axle (‑)

15 Left Drive Axle (+)

18 Left Drive Axle (‑)

X3

15 Way

(if ECU is

congured for

6 sensors)

11 Left Additional Axle (+)

14 Left Additional Axle (‑)

12 Right Additional Axle (+)

15 Right Additional Axle (‑)

Speed Sensor Repair Tests:

1. Take all measurements at the Electronic Control Unit

(ECU) harness connector pins in order to the check wire

harness and sensor. Probe the connector carefully so

that the terminals are not damaged.

2. The wheel speed sensor measurements should read:

Location Measurement

Sensor 1500 ‑ 2500 Ohms

Sensor to voltage or ground Open Circuit (no continuity)

Sensor output voltage >0.25 of VAC sensor output at ~ 0.5 revs/sec.

3. Clear the DTC after the issue is corrected. The sensor

DTC will remain until the power is cycled to the ABS

ECU and vehicle is driven above 15 MPH or the DTC

was cleared using either the diagnostic Blink Code

Switch or a diagnostic tool.

29

Connector Pin Power Supply Test

X1

18 Way

1Ground

2Ignition

16 Battery

Troubleshooting Diagnostic Trouble Codes (DTCs): Power Supply

6 Power Supply

1st. Blink

Code Location

Power Supply Tests:

1. Take all measurements at the ECU harness

connector.

2. Place a load (e.g. an 1157 stop lamp) across the

battery or ignition and ground connection, measure

the ignition and battery voltage with the load. Ignition

to Ground should measure between 9 to 17 VDC.

Battery to Ground should also measure between 9 to

17 VDC.

Cab-mount ECU:

Looking into wire

harness connector

3. Check for damaged wiring, damaged or corroded

connectors and connections.

4. Check the condition of the vehicle battery and

associated components, verify that the ground

connection is good and tightened.

5. Check the alternator output for excessive noise.

X4

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

1Battery Voltage Too

Low Measure the battery voltage under load. Check the vehicle battery and associated

components. Check for damaged wiring. Check for damaged or corroded connectors

and connections.

2Battery Voltage Too

High Measure the battery voltage under load. Ensure that battery voltage is correct

for the Electronic Control Unit (ECU). Check the vehicle battery and associated

components. Check for damaged wiring. Check for damaged or corroded connectors

and connections.

30

Troubleshooting Diagnostic Trouble Codes (DTCs):

Pressure Modulator Valves (PMVs)

7 Left Steer Axle

8 Right Steer Axle

9 Left Drive Axle

10 Right Drive Axle

16 Left Additional Axle

17 Right Additional Axle

20 Trailer PMV

1st. Blink

Code Location

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

1Release Solenoid

Shorted to Ground Verify no continuity between the PMV leads and ground. Verify 4.9 to 5.5 ohms

from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from REL to HLD. Check

for corroded/damaged wiring or connectors between the Electronic Control Unit

(ECU) and PMV.

2Release Solenoid

Shorted to Voltage Verify no continuity between the PMV leads and voltage. Verify 4.9 to 5.5 ohms

from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from REL to HLD. Check

for corroded/damaged wiring or connectors between the ECU and PMV.

3Release Solenoid

Open Circuit Verify 4.9 to 5.5 ohms from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from

REL to HLD. Check for corroded/damaged wiring or connectors between the

ECU and PMV.

4Hold Solenoid Shorted

to Ground Verify no continuity between the PMV leads and ground. Verify 4.9 to 5.5 ohms

from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from REL to HLD. Check

for corroded/damaged wiring or connectors between the ECU and PMV.

5Hold Solenoid Shorted

to Voltage Verify no continuity between the PMV leads and voltage. Verify 4.9 to 5.5 ohms

from REL to CMN & HLD CMN, and 9.8 to 11 ohms from REL to HLD. Check for

corroded/damaged wiring or connectors between the ECU and PMV.

6Hold Solenoid Shorted

to Open Circuit Verify 4.9 to 5.5 ohms from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from

REL to HLD. Check for corroded/damaged wiring or connectors between the

ECU and PMV.

7CMN Open Circuit Verify 4.9 to 5.5 ohms from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from

REL to HLD. Check for corroded/damaged wiring or connectors between the ECU

and PMV. This is potentially a miswired or internal mechanical problem.

8Conguration Error A mis‑match exists between the ECU conguration and the modulator installation

and wiring. Verify the PMV wiring and installation. Verify the ECU conguration.

Special Note regarding Trailer PMV: Pneumatic issues can result in this DTC being

set. Verify all lines are free from debris or other obstructions, kinks, etc.

31

Pressure Modulator Valve (PMV) Repair Tests:

1. Take all measurements at the Electronic Control Unit (ECU) harness

connector pins in order to check wire harness and PMV. Probe the

connector carefully so that the terminals are not damaged.

2. The pressure modulator resistance should read:

Location Measurement

Release to Common 4.9 to 5.5 Ohms

Hold to Common 4.9 to 5.5 Ohms

Release to Hold 9.8 to 11.0 Ohms

Release, Hold, Common to

Voltage or Ground Open Circuit (no continuity)

When troubleshooting modulator Diagnostic Trouble Codes (DTCs),

check inactive DTCs and the event history for over-voltage or

excessive noise DTCs. If one of these is found, troubleshoot these

DTCs rst before the PMV.

Cab-mount ECU: Looking into

the wire harness connector

4

Connector Pin PMV Location

X2

18 Way

1 Left Steer Axle Hold

2 Left Steer Axle Release

3 Left Steer Axle Common

4 Right Steer Axle Hold

6 Right Steer Axle Common

7 Right Steer Axle Release

9 Right Drive Axle Common

10 Right Drive Axle Hold

13 Right Drive Axle Release

12 Left Drive Axle Common

16 Left Drive Axle Hold

17 Left Drive Axle Release

X3

15 Way (if

the ECU is

congured for

6 modulators)

4 Left Additional Axle Hold

6 Left Additional Axle Common

7 Left Additional Axle Release

9 Right Additional Axle Common

10 Right Additional Axle Hold

13 Right Additional Axle Release

X4

12 Way

6 Trailer PMV Hold

9Trailer PMV Release

12 Trailer PMV Common

32

1st. Blink

Code

11

Location:

J1939

Troubleshooting Diagnostic Trouble Codes (DTCs):

J1939 Serial Communications

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

1 J1939 Serial Link There is loss of communications between the Bendix® ESP® EC‑80™ Controller and

other devices connected to the J1939 link. Check for damaged or reversed J1939

wiring. Check for corroded or damaged connectors. Verify the Electronic Control

Unit (ECU) conguration. Check for other devices inhibiting J1939 communications.

2J1939 Electronic

Retarder Time‑out

or Invalid Signal

Check for damaged or reversed J1939 wiring. Check for corroded or damaged

connectors. Verify the presence of a retarder on the J1939 link. Verify the ECU

conguration. Verify that the retarder is congured to broadcast ERC1. Check for

other devices inhibiting J1939 communications.

3J1939 Electronic Engine

Controller 1 Time‑out

or Invalid Signal

Check for damaged or reversed J1939 wiring. Check for corroded or damaged

connectors. Verify the presence of ECU on the J1939 link. Verify the ECU

conguration. Verify the ECU is congured to broadcast EEC1. Check for other

devices inhibiting J1939 communications.

4J1939 Electronic Engine

Controller 2 Time‑out

or Invalid Signal

Check for damaged or reversed J1939 wiring. Check for corroded or damaged

connectors. Verify the presence of Engine ECU on the J1939 link. Verify the ECU

conguration. Verify that there is an EEC2 broadcast from the address congured

in the ABS ECU. Check for other devices inhibiting J1939 communications.

5 J1939 AIR Message

Time‑out or Invalid

Signal

Invalid pressure signals received from a vehicle Controller. Verify the proper

operation of brake demand sensors. Check wiring between brake demand sensors

and the vehicle Controller. Verify the proper programming of vehicle Controller.

Check for damaged or reversed J1939 wiring. Check for damaged or corroded

connectors. Check for other device inhibiting J1939 communications.

6 ESP J1939 CAN

Message Time‑out

Invalid ESP messages on the J1939 link. Check for damaged or reversed J1939

wiring. Check for damaged or corroded connectors. Verify the presence of engine

and / or retarder on J1939. Verify the proper programming of engine and/or retarder.

Check for other devices inhibiting J1939 communications.

7J1939 Transmission

Communication for HSA

There is loss of communications between the EC‑80 ECU and the transmission

ECU over the J1939 link. Check for damaged or reversed J1939 wiring. Check

for damaged or corroded connectors. Verify the presence of transmission ECU on

J1939 link. Check for other devices inhibiting J1939 communications.

8 Time‑out or invalid data

on XBR

Check for damaged or reversed J1939 wiring. Check for damaged or corroded

connectors. Check for other devices inhibiting J1939 communications. Verify the

ECU conguration. Verify XBR message being broadcast from address 42.

10 J1939 Electronic

Transmission Controller

1 Time‑out or Invalid

Signal

There is loss of communications between the Bendix EC‑80 Controller and the

transmission ECU over the J1939 link. Check for damaged or reversed J1939 wiring.

Check for corroded or damaged connectors. Verify the presence of engine ECU

on the J1939 link. Verify the ECU conguration. Check for other devices inhibiting

J1939 communications.

11 AUXIO CAN message

Time‑out

Check for damaged or reversed J1939 wiring. Check for damaged or corroded

connectors. Check for other devices inhibiting J1939 communications. Verify the

ECU conguration. Verif y AUX IO broadc ast from address c ongured in EC‑ 80 ECU.

12 J1939 Hill Start Feature

Switch Signal Not

Available

Check for damaged or reversed J1939 wiring. Check for damaged or corroded

connectors. Verif y the ECU conguration. Verify EBC1 being broadcast with a valid

SPN 577 parameter. Check for other devices inhibiting J1939 communications.

14 J1939 CAN Message

related to ESP is

incomplete

Check for damaged or reversed J1939 wiring. Check for damaged or corroded

connectors. Check for other devices inhibiting J1939 communications. Verify the

ECU conguration. Verify ESP messages.

33

Cab-mount ECU:

Looking into wire harness connector

J1939 Troubleshooting Tests:

1. Take all measurements at ECU harness

connector.

2. Check for damaged or reversed J1939

wiring.

3. Check for corroded or damaged wiring

connector problems such as (opens or

shorts to voltage or ground).

4. Check for other J1939 devices which

may be loading down (inhibiting) J1939

communication.

X4

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

15 J1939 Electronic Engine

Controller 3 Time‑out or

Invalid Signal

There is loss of communications between the Bendix® ESP® EC‑80™ Controller and

the engine Electronic Control Unit (ECU) over the J1939 link. Check for damaged

or reversed J1939 wiring. Check for corroded or damaged connectors. Verify the

presence of engine ECU on the J1939 link. Verify the ECU conguration. Check

for other devices inhibiting J1939 communications.

16 J1939 Electronic

Transmission Controller

2 Time‑out

There is loss of communications between the Bendix EC‑80 Controller and the

transmission ECU over the J1939 link. Check for damaged or reversed J1939 wiring.

Check for corroded or damaged connectors. Verify the presence of engine ECU

on the J1939 link. Verify the ECU conguration. Check for other devices inhibiting

J1939 communications..

20 J1939 EAC1 Time‑out

or Invalid Signal

Verify 60 ohms of resistance between X1 pin 7 and X1 pin 8. Check for damaged

or reversed J1939 wiring. Check for damaged or corroded connectors. Verify that

the message is being transmitted. Verify data for Electronic Axle Controller 1 is

correct. Verify the ECU conguration.

21 CAN Message

CGW_C1 Time‑out or

invalid signal

Verify 60 ohms of resistance between X1 pin 7 and X1 pin 8. Check for damaged or

reversed J1939 wiring. Check for damaged or corroded connectors. Verify that the

message is being transmitted. Verify that the data for differential lock(s) is correct.

Verify the ECU conguration.

22 CAN Message

ASC1_CLCS Time‑out

or invalid signal

Verify 60 ohms of resistance between X1 pin 7 and X1 pin 8. Check for damaged

or reversed J1939 wiring. Check for damaged or corroded connectors. Verify that

the message is being transmitted. Verify that the data for Air Suspension Control 1

is correct. Verify the ECU conguration.

23 J1939 CCVS Time‑out

or Invalid Signal

Verify 60 ohms of resistance between X1 pin 7 and X1 pin 8. Check for damaged or

reversed J1939 wiring. Check for damaged or corroded connectors. Verify message

is being transmitted. Verify the ECU conguration.

24 J1939 TCO

(Tachograph)

Time‑out

Verify 60 ohms of resistance between X1 pin 7 and X1 pin 8. Check for damaged or

reversed J1939 wiring. Check for damaged or corroded connectors. Verify message

is being transmitted. Verify the ECU conguration.

26 J1939 Address Conict

ABS Address

Verify only one ABS ECU is connected on J1939 bus, broadcasting OBh (equals

13 decimal).

27 J1939 Address Conict

TPMS Address

Verify only one TPMS ECU is connected on J1939 bus, broadcasting 33h.

28 J1939 Proprietary XBR

Message Out of Range

Verify 60 ohms of resistance between X1 pin 7 and X1 pin 8. Check for damaged

or reversed J1939 wiring. Check for damaged or corroded connectors. Check for

messages being transmitted/received.

29 J1939 CAN Messages

Are Not Being

Transmitted/Received

Verify 60 ohms of resistance between X1 pin 7 and X1 pin 8. Check for damaged

or reversed J1939 wiring. Check for damaged or corroded connectors. Check for

messages being transmitted/received.

Connector Pin J1939

X1

18 Way

7J1939 Low

8J1939 High

34

1st. Blink

Code 12 Location:

Miscellaneous

Troubleshooting Diagnostic Trouble Codes (DTCs): Miscellaneous

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

1Stop Lamp Switch

Not Detected The Electronic Control Unit (ECU) has not detected the presence of the stop lamp switch

since ignition power was applied (note that stop lamp switch input may be applied to

the Bendix® ESP® EC‑80™ Controller using either hard‑wire input or J1939). Apply

and release service brake. Check for brake switch input into ECU (see system wiring

schematic). With service brake released, check for presence of the stop lamp bulb.

With service brake applied, verify system voltage is now present at the stop lamp switch

input to the ECU. Check for damaged wiring between ECU, stop lamp switch and bulb.

Check for corroded or damaged connectors. Check for damaged or reversed J1939

wiring. Check for corroded or damaged connectors on J1939 link. Verify the presence

of engine ECU on the J1939 link. Verify the ECU conguration.

2Stop Lamp Switch

Defective Apply and release service brake. Check for brake switch input into ECU (see system

wiring schematic). With service brake released, check for presence of the stop lamp bulb.

With service brake applied, verify system voltage is now present at the stop lamp switch

input to the ECU. Check for damaged wiring between ECU, stop lamp switch and bulb.

Check for corroded or damaged connectors. Check for damaged or reversed J1939

wiring. Check for corroded or damaged connectors on J1939 link. Verify the presence

of engine ECU on the J1939 link. Verify the ECU conguration.

3ATC or ESP Disabled

or Dynamometer Test

Mode Active

ATC or ESP is disabled. ECU has been placed in the Dynamometer Test Mode by either

the diagnostic Blink Code Switch or a hand‑held or PC‑based diagnostic tool. Clear

DTCs to exit Dynamometer Test Mode.

4Retarder Relay Open

Circuit or Shorted to

Ground

Verify vehicle contains a retarder relay. Verify the ECU conguration. Check wiring

between ECU and retarder relay. Verify no continuity between retarder disable output of

Bendix ESP EC‑80 Controller and ground. Verify condition and wiring of the retarder relay.

5Retarder Relay Circuit

Shorted to Voltage Check wiring between ECU and retarder relay. Verify no continuity between retarder

disable output of Bendix ESP EC‑80 Controller and voltage. Verify condition and wiring

of the retarder relay.

6ABS Indicator Lamp

Circuit DTC Check operation of diagnostic Blink Code Switch. Check wiring of diagnostic Blink Code

Switch (verify ABS wire is not grounded where used) and ABS Indicator Lamp. Verify

ABS Indicator Lamp ground input. On some vehicles with multi‑plex dashes, the ground

wire may not be present - see ECU 19 DTC.

7PMV Common

Shorted to Ground Verify no continuity between the Release, Hold and CMN of all Pressure Modulator Valves

(PMVs), Traction Control Valve (TCV), HSA, Diff Lock Solenoid and ground. Check for

corroded/damaged wiring or connectors between the ECU and CMN of all PMVs, TCV,

and Diff Lock Solenoid. See the extended troubleshooting for this code in Appendix A.

8PMV Common

Shorted to Voltage Verify no continuity between the Release, Hold and CMN of all PMVs, TCV, HSA, Diff

Lock Solenoid and voltage. Check for corroded/damaged wiring or connectors between

the ECU and CMN of all PMVs, TCV, and Diff Lock Solenoid.

9ATC Disabled to

Prevent Brake Fade The Bendix® ATC (Automatic Traction Control) system is temporarily disabled to

prevent excessive heating of the foundation brakes.

11 Wheel Speed

Sensors Reversed on

an Axle

Sensors are reversed (left to right) on one of the axles. Verify the proper installation,

connection, and wiring of the sensors.

14 Sensor CAN Supply

Voltage Error Incorrect supply voltage for the Steering Angle Sensor (SAS) and the Yaw Rate sensor.

Verify the proper voltage at the sensor connectors. Verify the wiring between the ECU

and the sensors. Verify the proper output voltage from ECU. Note: When checking for

voltage at YAW/LAS & SAS, the voltage will only be present momentarily at key ON.

17 ABS disabled due to

off‑road mode The ABS indicator lamp will be ashing, indicating the ECU is in the off‑road ABS mode.

Remove and re‑apply ignition power.

19 Maximum number

of PMV cycles

exceeded Replace all PMV valves and clear the DTC.

35

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

20 Maximum Number

of TCV Cycles

Exceeded

Replace all Traction Control Valve (TCV) valves and clear the Diagnostic Trouble Code

(DTC).

22 ESP Sensor Voltage

Out of Range Incorrect supply voltage is detected for the Bendix® SAS‑60™ and the Yaw Rate sensor.

Verify the proper voltage at sensor connectors. Verify wiring between the Electronic

Control Unit (ECU) and the sensors. Verify the proper output voltage from ECU.

Note: When checking for voltage at YAW/LAS & SAS, the voltage will only be present

momentarily at key ON.

24 HS Feature Lamp

Open or Shorted

to Ground

Verify no continuity between the Hill Start / Hill Start Assist lamp and ground. Verify

continuity between the lamp and the ECU. Check the wiring between the lamp and the

ECU. Check the lamp and the condition of its wiring.

25 HS Feature Solenoid

Open or Shorted

to Ground

The Hill Start / Hill Start Assist solenoid is shorted to ground or has a broken wire. Verify

no continuity between the solenoid and ground. Check for corroded/damaged wiring or

connectors between the ECU and the solenoid.

26 HS Feature Solenoid

Shorted to Voltage Verify no continuity between the Hill Start / Hill Start Assist Solenoid and voltage. Check

for corroded/damaged wiring or connectors between the ECU and Solenoid.

27 Brake Lamp Input

Mismatch With Brake

Lamp Output There is a brake lamp input mismatch with the brake lamp output.

28 Air system/

Mechanical

Component

Verify brakes are operating correctly. Verify that there is not over‑braking at one or more

wheel end(s). Check the pneumatic plumbing and the exhaust port of the PCVs, TCVs,

and relay valves and conrm that the air is being exhausted from all brake chambers.

Verify tire sizes on the vehicle match the ABS ECU conguration. Verify wheel speed

sensors and tone ring are properly adjusted and in good condition.

29 Air system/

Mechanical

Component

Verify that the tires are in good condition. Verify that no pneumatic hoses are twisted

or kinked. Verify that the brakes are operating correctly. Verify that the wheel speed

sensor and tone ring are properly adjusted. Verify tire size.

30 ESP Disabled due to

Off Road Mode Electronic Stability has been disabled due to the vehicle being in the ABS or ATC off

road mode. Cycle ABS Off Road or ATC Mud snow switch.

31 HS Feature Lamp

Shorted to Voltage Verify that there is no resistance measured between the battery and HSA lamp output

of the ECU. Check the wiring between the ECU and the Hill Start / Hill Start Assist

lamp. Check the lamp and condition of its wiring.

32 I/O 2 or 3 Shorted

High (EC‑80‑ATC)

OR

I/O 2 or 3 shorted

High or Stop Lamp

Output error (ESP

EC‑80)

Check for a short‑circuit condition between voltage and the I/O 2 and I/O 3 circuits.

33 HS Feature Solenoid

Open Circuit Verify resistance across the Hill Start / Hill Start Assist solenoid. Check the ECU and

HSA solenoid for corroded or damaged wiring and/or connectors.

34 eTrac Valve Solenoid

Shorted to Voltage Verify the resistance between voltage and the Bendix® eTrac™ solenoid is open. Check

for corroded or damaged wiring or connectors between the ECU and the eTrac solenoid.

35 eTrac Valve Solenoid

Shorted to Ground Verify the resistance between ground and the Bendix eTrac solenoid is open. Check for

corroded or damaged wiring or connectors between the ECU and the eTrac solenoid.

36 Reserved Reserved

38 Invalid ABS Warning

Lamp Conguration Check X1‑12 if pin/wire installed. X2‑12 should have no terminal or connection. ABS

Warning Lamp is controlled via J1939.

36

1st. Blink

Code

13

Location:

ECU

Troubleshooting Diagnostic Trouble Codes (DTCs): ECU

2nd

Blink

Code

Diagnostic

Trouble Code

Description

(With HEX

designation)

Repair Information

1ECU DTC (5FC)

Check for damaged or corroded connectors. Check for damaged

wiring. Clear Diagnostic Trouble Codes (DTCs). If DTCs return,

contact the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247‑2725,

option 2, then 1) for further troubleshooting assistance.

2ECU DTC (5CD)

3ECU DTC (10)

4ECU DTC (2678C)

5ECU DTC (1C)

6ECU DTC (6CD)

7Conguration

mismatch Verify components installed match the Electronic Control Unit (ECU)

conguration.

8ECU DTC (56)

Check for damaged or corroded connectors. Check for damaged

wiring. Clear DTCs. If DTCs return, contact the Bendix Tech Team

at 1‑800‑AIR‑BRAKE (1‑800‑247‑2725, option 2, then 1) for further

troubleshooting assistance.

9ECU DTC (CAC3)

10 ECU DTC (5F3)

11 ECU DTC (F1A)

12 ECU DTC (F14)

13 Conguration

mismatch Verify components installed match ECU conguration.

14 ECU DTC (C6) Check for damaged or corroded connectors. Check for damaged

wiring. Clear DTCs. If DTCs return, contact the Bendix Tech Team

at 1‑800‑AIR‑BRAKE (1‑800‑247‑2725, option 2, then 1) for further

troubleshooting assistance.

15 ECU DTC (CF)

16 ECU DTC (C0)

17 ECU DTC (C8C)

18 ECU DTC (CC) Parameter le was not downloaded. To verify that the vehicle specic

parameters have been loaded, contact Bendix for more information

at 1‑800‑AIR‑BRAKE (1‑800‑247‑2725).

19 ECU DTC (63)

Check for damaged or corroded connectors. Check for damaged

wiring. Clear DTCs. If DTCs return, contact the Bendix Tech Team

at 1‑800‑AIR‑BRAKE (1‑800‑247‑2725, option 2, then 1) for further

troubleshooting assistance.

20 ECU DTC (6E)

21 ECU DTC (6C)

22 ECU DTC (63C)

25 ECU Internal VIN

Mismatch

The ECU internally‑stored VIN does not match the VIN of the vehicle.

Ensure that the ECU is installed on the correct vehicle. Verify the

ECU programming. Verify engine programming.

26 Valve Conguration

Mismatch

Check for damaged or corroded connectors. Check for damaged

wiring. Clear DTCs. If DTCs return, contact the Bendix Tech Team

at 1‑800‑AIR‑BRAKE (1‑800‑247‑2725, option 2, then 1) for further

troubleshooting assistance.

28 ECU DTC (7CD) Check for damaged or corroded connectors. Check for damaged

wiring including power and ground wiring. Clear DTCs. If DTCs return,

contact the Bendix Tech Team at 1‑800‑AIR‑BRAKE (1‑800‑247‑2725,

option 2, then 1) for further troubleshooting assistance.

29 ECU DTC (5D)

37

Location Measurement

TCV to TCV Common 7 to 19 Ohms

Release, Hold, Common

to Voltage or Ground Open Circuit (no continuity)

Troubleshooting Diagnostic Trouble Codes (DTCs):

Traction Control Valves (TCV)

18 Drive Axle Traction Control Valve

19 Steer Axle Traction Control Valve

1st. Blink

Code Location

Cab-mount ECU:

Looking into wire

harness connector

Traction Control Valve (TCV) Repair Tests:

1. Take all measurements at ECU harness connector pins in order to check wire harness

and traction control valve. Probe the connector carefully so that the terminals are not

damaged.

2. Tractor Control Valve resistance measurements should read:

Connector Pin Traction Control Test

X1

18 Way

4Drive Axle Traction

Control Valve Common

5Drive Axle Traction

Control Valve

Connector Pin Traction Control Test

X3

15 Way

3Steer Axle Traction

Control Valve Common

5Steer Axle Traction

Control Valve

X4

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

1TCV Solenoid Shorted

to Ground

Verify 7 to 19 ohms between Traction Control Valve (TCV) and TCV

common. Verify no continuity between TCV leads and ground. Check

for corroded/damaged wiring or connectors between the ECU and TCV.

2TCV Solenoid Shorted

to Voltage

Verify 7 to 19 ohms between TCV and TCV common. Verify no continuity

between TCV leads and voltage. Check for corroded/damaged wiring or

connectors between ECU and TCV.

3TCV Solenoid Open

Circuit

Verify 7 to 19 ohms between TCV and TCV common. Check for corroded/

damaged wiring or connectors between ECU and TCV.

4TCV Conguration Error The ECU is not congured for ESP or ATC, but has detected the presence

of a TCV. Verify TCV wiring. Inspect for the presence of a TCV. Verify

the ECU conguration.

NOTE: When troubleshooting Traction

Control Valve DTCs, it may be useful to look

for a potential connection between them and

ECU DTCs (in particular, DTCs 13‑8 and 13‑18

shown on page 36).

ATR valve inspections should include: looking for kinked air hoses; inside the harness socket on the valve for

removed or corroded connector pins; and a test to verify that the ATC valve solenoids are functioning correctly.

38

1st. Blink

Code

21

Location:

Steering Angle Sensor

Troubleshooting Diagnostic Trouble Codes (DTCs):

Steering Angle Sensor (SAS) [Bendix® SAS-60™ Sensor]

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

1SAS Not Calibrated Steering Angle Sensor (SAS) has not been calibrated.

Perform SAS calibration procedure.

2SAS Calibration

in Progress

SAS calibration procedure is underway.

3SAS Static Signal SAS signal incorrect. Verify the proper installation of the SAS. Verify proper wiring

between the Electronic Control Unit (ECU) and the SAS. Check SAS output.

4SAS Signal Out

of Range

SAS signal incorrect. Verify the proper installation of the SAS. Verify proper wiring

between the ECU and the SAS. Check SAS output. Perform SAS calibration

procedure.

5SAS Signal Reversed SAS signal is reversed. Verify the proper installation of the SAS. Verify proper

wiring between the ECU and the SAS. Check SAS output.

6SAS Invalid Signal SAS signal is invalid. Verify the proper installation of the SAS. Verify proper wiring

between the ECU and the SAS. Check SAS output. Verify that correct SAS is

being used.

7SAS Gradient Error SAS signal is invalid. Verify the proper installation of the SAS. Verify proper wiring

between the ECU and the SAS. Check SAS output. Verify that correct SAS is

being used.

8SAS CAN Time‑out Loss of CAN communications between the ECU and the SAS. Verify proper wiring

between the ECU and the SAS. Check SAS output.

9SAS Long Term

Calibration Error

SAS calibration error. Verify the proper installation of the SAS. Verify proper wiring

between the ECU and the SAS. Check SAS output. Verify that correct SAS is being

used. Verify proper ECU programming. Perform SAS calibration procedure.

10 SAS Plausibility Check ECU has detected incorrect SAS signal as compared to the Yaw Rate sensor signal.

Verify the proper installation of the SAS. Verify proper wiring between the ECU and

the SAS. Check SAS output. Verify that correct SAS is being used. Verify proper

ECU programming. Perform SAS calibration procedure.

11 SAS detected but

not congured

Verify the ECU is congured for ESP.

39

Steering Angle Sensor Tests

1. Measure resistance between input voltage and ground

at the sensor wiring harness connector.

Verify continuity between the Electronic Control Unit

(ECU) and SAS‑60 and Yaw Rate Sensor (typically

YAS‑70 or YAS‑60).

Connector Pin Function

SAS 2Voltage Input

1Ground Input

ECU

12 Way X4 11 Power

10 Common

2. Verify wiring between the Steering Angle Sensor and

the ECU.

SAS Wire

Harness

Terminal

ECU Wire

Harness

Terminal Measurement

4 7 Verify Continuity

3 8 Verify Continuity

3. Verify wiring between the Steering Angle Sensor and

power/ground.

SAS Wire Harness

Terminal Measurement

4 to Voltage &

Ground Verify open circuit (no

continuity)

3 to Voltage &

Ground Verify open circuit (no

continuity)

Troubleshooting Diagnostic Trouble Codes (DTCs):

Steering Angle Sensor (SAS) [Bendix® SAS-60™ Sensor]

(continued)

Looking into wire harness connector

Steering Angle Sensor (SAS) Connector

(Note: When checking for voltage at YAW/LAS & SAS, the voltage will only be present momentarily at key ON).

4. To perform a calibration procedure of the Steering Angle

Sensor, Bendix® ACom® Diagnostic Software V6.7.2.5

or higher is required. Using the program, select the

“Configuration” option, followed by the “Calibrate”

option. The following screen should be displayed.

5. Follow the prompts to perform a calibration of the

Steering Angle Sensor.

6. To test the Steering Angle Sensor, ACom V6.7.2.5, or

higher, is required. Using Bendix ACom V6.7.2.5 or

higher, select the “Component Test” option, followed

by the “ESP Test” option. The following screen should

be displayed.

7. Follow the prompts to perform a test of the Steering

Angle Sensor.

40

Troubleshooting Diagnostic Trouble Codes (DTCs):

Yaw Rate Sensor (YRS)

1st. Blink

Code

22

Location:

Yaw Rate Sensor

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

1YRS Signal Out of

Range The YRS signal is incorrect. Verify the proper installation of the YRS. Verify proper

wiring between the Electronic Control Unit (ECU) and the YRS. Check the YRS output.

Perform the YRS calibration procedure.

2YRS Sensor

Reversed Signal The YRS signal is reversed. Verify the proper installation of the YRS. Verify the wiring

between the ECU and the YRS. Check the YRS output.

3YRS Invalid Signal The YRS signal is invalid. Verify the proper installation of the YRS. Verify proper

wiring between the ECU and the YRS. Check the YRS output. Verify that correct

YRS is being used.

4YRS Gradient Error

5YRS CAN Time‑out Loss of CAN communications between the ECU and the YRS. Verify proper wiring

between the ECU and the YRS. Check the YRS output.

6YRS Static BITE

Error The YRS signal fails static self‑test. Verify the proper installation of the YRS. Verify

proper wiring between the ECU and the YRS. Check the YRS output. Verify that

correct YRS is being used. Verify proper ECU programming. Perform the YRS

calibration procedure.

7YRS Dynamic BITE

Error The YRS signal fails self‑test conducted while vehicle is in motion. Verify the proper

installation of the YRS. Verify proper wiring between the ECU and the YRS. Check the

YRS output. Verify that correct YRS is being used. Verify proper ECU programming.

Perform the YRS calibration procedure.

8YRS Fast Calibration

Error There is a YRS calibration error. Verify the proper installation of the YRS. Verify proper

wiring between the ECU and the YRS. Check the YRS output. Verify that correct YRS is

being used. Verify proper ECU programming. Perform the YRS calibration procedure..

9YRS Static

Calibration Error

10 YRS Normal

Calibration Error There is a YRS calibration error. Verify the proper installation of the YRS. Verify proper

wiring between the ECU and the YRS. Check the YRS output. Verify that correct YRS

is being used. Verify proper ECU programming. Perform the YRS calibration procedure.

12 YRS Plausibility

Check (Ref Yaw

Rate)

The ECU has detected an incorrect YRS signal. Verify the proper installation of the

YRS. Verify proper wiring between the ECU and the YRS. Check the YRS output.

Verify that correct YRS is being used. Verify proper ECU programming. Perform the

YRS calibration procedure.

13 YRS Plausibility Error

(Inside Model Based

Limits)

14 YRS Plausibility

Error (Outside Model

Based Limits)

15 YRS ‑ SAS Signal

Cross‑check

Incomplete

The ECU (if congured) must conrm that YRS and SAS signals match. The vehicle

must be exposed to an S‑shaped driving maneuver for this DTC to automatically clear.

If the DTC does not clear even after the S‑shaped driving maneuver, check and correct

the orientation of the YRS and then repeat the maneuver.

16 YRS ‑ Vibration

Detected Inspect the YRS mounting and verify it is securely mounted. Note that the YRS may

not be relocated from the OEM‑installed position on vehicle without written Bendix

Engineering approval.

17 YRS Detected But

Not Congured

Verify that the ECU is congured for ESP.

41

Troubleshooting Diagnostic Trouble Codes (DTCs):

Yaw Rate Sensor (YRS) (continued)

Yaw Rate Sensor Tests

1. Verify continuity between the Electronic Control Unit

(ECU) and the Yaw Rate Sensor (typically YAS‑70 or

YAS‑60).

Connector Pin Function

YRS 2Voltage Input

1Ground Input

ECU

12 Way X4 11 Power

10 Common

2. Verify wiring between the Yaw Rate Sensor and the

ECU.

YRS Wire

Harness

Terminal

ECU Wire

Harness

Terminal Measurement

4 7 Verify Continuity

3 8 Verify Continuity

3. Verify wiring between the Yaw Rate Sensor and power/

ground.

YRS Wire Harness

Terminal Measurement

4 to Voltage &

Ground Verify open circuit (no

continuity)

3 to Voltage &

Ground Verify open circuit (no

continuity)

Looking into wire harness connector

Yaw Connector

(Note: When checking for voltage at YAW/LAS & SAS, the voltage will only be present momentarily at key ON.).

4. To perform a calibration procedure of the Yaw Rate

Sensor, ACom® Diagnostic Software V6.7.2.5 (or

higher) is required. Using the program, select the

“Configuration” option, followed by the “Calibrate”

option. The following screen should be displayed.

5. Follow the prompts to perform a calibration of the Yaw

Rate Sensor.

6. To test the Yaw Rate Sensor, ACom V6.7.2.5, or higher,

is required. Using Bendix ACom V6.7.2.5 or higher,

select the “Component Test” option, followed by the

“ESP Test” option. The following screen should be

displayed.

7. Follow the prompts to perform a test of the Yaw Rate

Sensor.

42

Troubleshooting Diagnostic Trouble Codes (DTCs):

Lateral Acceleration Sensor (LAS)

1. Follow the steps shown in the Yaw Rate Sensor

troubleshooting section for calibration and

troubleshooting of the Lateral Acceleration Sensors

(previous page).

1st. Blink

Code

23

Location:

Lateral Acceleration

Sensor

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

1LAS Signal Out of

Range LAS signal incorrect. Verify the proper installation of the YRS/LAS. Verify

proper wiring between the Electronic Control Unit (ECU) and the YRS/LAS.

Check YRS/LAS output. Perform LAS calibration procedure.

2LAS Calibration in

Progress

LAS calibration procedure is underway.

3 LAS Static

Calibration Error

LAS calibration error. Verify the proper installation of the YRS/LAS. Verify

proper wiring between the ECU and the YRS/LAS. Check YRS/LAS output.

Verify that correct YRS/LAS is being used. Verify proper ECU programming.

Perform LAS calibration procedure.

4 LAS Long Term

Calibration Error

LAS calibration error. Verify the proper installation of the YRS/LAS. Verify

proper wiring between the ECU and the YRS/LAS. Check YRS/LAS output.

Verify that correct YRS/LAS is being used. Verify proper ECU programming.

Perform LAS calibration procedure.

5LAS Plausibility

Error (Inside ECU‑

specic Limits)

ECU has detected an incorrect LAS signal. Verify the proper installation of the

YRS/LAS. Verify proper wiring between the ECU and the YRS/LAS. Check

YRS/LAS output. Verify that correct YRS/LAS is being used. Verify proper

ECU programming. Perform LAS calibration procedure.

6LAS Plausibility

Error (Outside ECU

–specic Limits)

ECU has detected an incorrect LAS signal. Verify the proper installation of the

YRS/LAS. Verify proper wiring between the ECU and the YRS/LAS. Check

YRS/LAS output. Verify that correct YRS/LAS is being used. Verify proper

ECU programming. Perform LAS calibration procedure.

7 Erratic ESP Sensor

Signal

ECU has detected an erratic signal. Verify the proper installation of the YRS/

LAS. Verify proper wiring between the ECU and the YRS/LAS. Check YRS/

LAS output. Verify that correct YRS/LAS is being used. Verify proper ECU

programming. Perform LAS calibration procedure.

(Note: When checking for voltage at YRS/LAS & SAS, the voltage will only be present momentarily at key ON.).

43

Troubleshooting Diagnostic Trouble Codes (DTCs):

Brake Demand/Load Sensors

Brake Demand/Load Sensor Tests

1. Verify continuity between the ECU and the pressure

sensor power and ground.

Power and Ground Input Test Measurement

B = Power Input X4 ‑ 4 Power

A = Ground Input X4 ‑ 1 Common

2. Verify wiring between the Load Sensor and the ECU.

Load Sensor

Wire Harness

Terminal

ECU Wire Harness

Terminal Measurement

C

X4 ‑ 2 Brake Demand

Sensor (primary brake circuit) Verify Continuity

X4 ‑ 5 Brake Demand Sensor

(secondary brake circuit) Verify Continuity

X4 ‑ 3 Load Sensor Verify Continuity

Looking into wire

harness connector

3. Verify wiring between the Load Sensor and power/

ground.

Load Sensor

Harness Terminal Measurement

C to Voltage & Ground Verify open circuit (no continuity)

4. To perform a calibration procedure of the Brake Demand

Sensor(s), ensure that the air system is fully charged.

Apply ignition power, and wait 30 seconds. Perform

a full application of the service brake and hold for 5

seconds. Release the service brake.

5. To test the Brake Demand Sensor and/or the Load

Sensor, Bendix® ACom® Diagnostic Software V6.7.2.5

or higher is required. Using the program, select the

“Component Test” option, followed by the “ESP Test”

option. The following screen should be displayed.

6. Follow the prompts to test the Brake Demand Sensor(s)

and/or the Load Sensor.

1st. Blink

Code

24

Location:

Brake Demand/

Load Sensor

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

1 PS1 Open or

Shorted

Check wiring between Brake Demand Sensor (primary brake circuit) and

Electronic Control Unit (ECU). Verify operation of pressure sensor.

2 PS2 Open or

Shorted

Check wiring between Brake Demand Sensor (secondary brake circuit) and ECU.

Verify operation of pressure sensor.

3 PS3 Open or

Shorted

Check wiring between Load Sensor and ECU. Verify operation of pressure sensor.

4PS1/2

Plausibility Error

ECU has detected an invalid pressure sensor signal from one of the Brake

Demand Sensors.

5 PS Supply

Voltage Error

Incorrect supply voltage to the sensors. Verify the proper voltage at sensor

connectors. Verify wiring between the ECU and the sensors. Verify the proper

output voltage from the ECU (Specically, ensure that X4‑4 PS_SPL is not

shorted to ground).

6 PS Not

Calibrated

Perform static sensor calibration procedure. (NOTE: When replacing an ECU,

this DTC may occur.)

7PS Error Verify operation of pressure sensor.

8 PS Supply

Voltage Error

Incorrect supply voltage to sensors. Verify the proper voltage at sensor connectors.

Verify wiring between ECU and the sensors. Verify the proper output voltage from ECU.

9 PS Not

Congured

Check for presence of pressure sensors. Make sure ESP is enabled.

44

Troubleshooting Diagnostic Trouble Codes (DTCs):

Valves Miscellaneous

1st. Blink

Code

25

Location:

Valves

2nd.

Blink

Code

Diagnostic Trouble

Code Description Repair Information

1Differential Lock

Solenoid Open Verify resistance between Diff solenoid and Diff common. Check for corroded

/damaged wriing or connectors between the Electronic Control Unit (ECU)

and the Diff solenoid.

2 Differential Lock

Solenoid Shorted to

Ground

Verify no continuity between the Diff Lock Solenoid and ground. Check for

corroded/damaged wiring or connectors between the ECU and Diff Lock

Solenoid.

3 Differential Lock

Solenoid Shorted to

Voltage

Verify no continuity between the Diff Lock Solenoid and voltage. Check for

corroded/damaged wiring or connectors between the ECU and Diff Lock

Solenoid.

4 I/O 3 Open Circuit Verify resistance for I/O3 circuit. Check for corroded / damaged wiring or

connector between ECU and I/O.

5 I/O 3 shorted to

Ground

Check for a short circuit condition between ground and the I/O 3 circuit

Verify resistance between Input /Output and ground is open

6 I/O 3 Shorted to

Battery

Check for a short circuit condition between voltage and the I/O 3 circuit

Verify resistance between Input /Output and voltage is open

7Output Conguration

Error ‑ Diff

Mismatch between ECU conguration and Diff valve

8Output Conguration

Error ‑ I/O 3

Mismatch between ECU conguration and I/O3

45

Troubleshooting Diagnostic Trouble Codes (DTCs):

Bendix® ESP® system-related

1st. Blink

Code

26

Location:

J1939 Bendix® ESP®

system-related

2nd.

Blink

Code

Diagnostic Trouble Code

Description Repair Information

1 J1939 CAN Time‑out of ESP

Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify message is being transmitted on J1939 link.

Verify the Electronic Control Unit (ECU) conguration

2 Time‑out or Invalid CAN data

–CCVS 2 ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify message is being transmitted on J1939 link.

Verify the ECU conguration

3 Time‑out or Invalid CAN data

–Electronic Engine Controller 1

ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of engine ECU on J1939 link.

Verify message is being transmitted on J1939 link. Verify data for driver's

demand torque, actual engine torque, engine speed is correct. Verify the

ECU conguration

4 Time‑out or Invalid CAN data

–EEC2 ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of engine ECU on J1939 link.

Verify message is being transmitted on J1939 link. Verify acceleration

pedal position and acceleration pedal status is correct. Verify the ECU

conguration

5 Time‑out or Invalid CAN data

– Driveline Line Retarder ESP

Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of a retarder on J1939 Link.

Verify that the message is being transmitted. Verify that the data is correct

for torque / speed control. Verify the ECU conguration

6 Time‑out or Invalid CAN data –

Engine Retarder ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of a retarder on J1939 Link.

Verify that the message is being transmitted. Verify that the data is correct

for torque / speed control. Verify the ECU conguration

7 Time‑out or Invalid CAN

data – Exhaust Retarder ESP

Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of a retarder on J1939 Link.

Verify that the message is being transmitted. Verify that the data is correct

for torque / speed control. Verify the ECU conguration

8 Time‑out or Invalid CAN data –

PROP XBR ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of Radar on J1939 link. Verify

message is being transmitted. Verify the ECU conguration

9 Time‑out or Invalid CAN data

– Transmission Retarder ESP

Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of a retarder on J1939 Link. Verify

that the message is being transmitted. Verify that the data in torque/speed

control. Verify the ECU conguration

10 Time‑out or Invalid CAN data

–Electronic Transmission

Controller 1 ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of transmission ECU on J1939

link. Verify that the message is being transmitted. Verify that the data for

shift in process, torque conguration lock , driveline engaged is correct.

Verify the ECU conguration

11 Time‑out or Invalid AUXI/O –

ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify that the message is being transmitted. Verify

that the data for reference torque is correct. Verify the ECU conguration

46

Troubleshooting Diagnostic Trouble Codes (DTCs):

J1939 Bendix® ESP® system-related (continued)

1st. Blink

Code

26

Location:

J1939 Bendix® ESP®

system-related

2nd.

Blink

Code

Diagnostic Trouble Code

Description Repair Information

12 Time‑out or invalid data for

Conguration of Electronic

Engine Controller 1 ESP

Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of engine on J1939 link. Verify

that the message is being transmitted. Verify that the data for reference

torque is correct. Verify the Electronic Control Unit (ECU) conguration

13 Invalid Data Transfer Time‑out

of EC1 ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of engine on J1939 link. Verify

that the message is being transmitted. Verify that the data for reference

torque is correct. Verify the ECU conguration

14 Time‑out or invalid data for

Conguration of Driveline Line

Retarder ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of a retarder on J1939 link. Verify

that the message is being transmitted. Verify that the data for reference

torque is correct. Verify the ECU conguration

15 Time‑out or invalid CAN data

–Electronic Engine Controller

ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or corroded

connectors. Verify the presence of engine ECU on J1939 link. Verify the

presence of engine ECU on J1939 link. Verify the ECU conguration

16 Time‑out or invalid CAN data

–Electrionic Transmission

Controller 2‑ message required

for ESP

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of transmission ECU on J1939

link. Verify that the message is being transmitted. Verify that the data for

current gear is correct. Verify the ECU conguration

17 Time‑out or invalid data

for Conguration of Engine

Retarder ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of a retarder on J1939 link. Verify

message is being transmitted. Verify the ECU conguration

18 Time‑out or invalid data for

Conguration of Exhaust

Retarder ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of a retarder on J1939 link. Verify

message is being transmitted. Verify the ECU conguration

19 Time‑out or invalid data for

Conguration of Transmission

Retarder ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of Radar on J1939 link. Verify

the ECU conguration

20 Invalid Data Transfer Time‑out

of Driveline Line Retarder ESP

Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of a retarder on J1939 link. Verify

message is being transmitted. Verify the ECU conguration

21 Invalid Data Transfer Time‑out

of Engine Retarder ESP

Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of a retarder on J1939 link. Verify

message is being transmitted. Verify the ECU conguration

22 Invalid Data Transfer Time‑out

of Exhaust Retarder ESP

Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of a retarder on J1939 link. Verify

the presence of a retarder on J1939 link. Verify message is being transmitted.

Verify the ECU conguration

47

Troubleshooting Diagnostic Trouble Codes (DTCs):

J1939 Bendix® ESP® system-related (continued)

1st. Blink

Code

26

Location:

J1939 ESP-related

2nd.

Blink

Code

Diagnostic Trouble Code

Description Repair Information

23 Time‑out or invalid CAN data –

CCVS ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify message is being transmitted on J1939 link.

Verify data for park brake, brake lamp switch, clutch and tachograph. Verify

the Electronic Control Unit (ECU) conguration

24 Time‑out or invalid CAN data –

TCO ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify message is being transmitted. Verify the ECU

conguration

25 Invalid Data Transfer Time‑out

of Driveline Line Retarder

ESP Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify the presence of a retarder on J1939 link. Verify

message is being transmitted. Verify the ECU conguration

26 ESP‑related CM3 Time‑out

at J1939

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify message is being transmitted. Verify the ECU

conguration

27 Time‑out of message or invalid

data received from transmission

transfer information on J1939 ‑

message required for ESP

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify message is being transmitted. Verify the ECU

conguration

28 Time‑out or invalid CAN data –

Electronic Axle Controller 1ESP

Message

Check for damaged or reversed J1939 wiring. Check for damaged or

corroded connectors. Verify message is being transmitted. Verify the ECU

conguration

48

Controllers utilize four (4) AMP connectors for wire harness connections.

Bendix ESP EC-80 Controller

Bendix® ESP® EC-80™ Controller Wire Harness Connector Part Numbers and Pin Assignments:

X1

CONNECTOR

X2

CONNECTOR

X3

CONNECTOR

X4

CONNECTOR

Troubleshooting: Connectors

X1 Connector Pin Assignments

Vary by Part Number:

X2 Connector

Pin

Assignments

X3 Connector

Pin

Assignments

X4 Connector Pin

Assignments

K098920R000

K098921R000

K103428R000

K103429R000

K105094R000

K105095R000

K105096R000

K105097R000

K105303R000

Pin Designation Designation Designation Designation Designation

1Ground PMV SA Left HLD ABS ORS Pressure Sensor CMN

2 Trailer ABS Indicator HSA Disable Switch PMV SA Left REL Diff. Lock Solenoid*Brake Demand Primary

Circuit Signal

3Ignition PMV SA Left CMN TCV CMN (SA) Load Sensor Signal

4 TCV CMN (DA) TCV (DA) PMV SA Right HLD PMV AA Left HLD Pressure Sensor

Supply

5 TCV (DA) TCV CMN (DA) WSS SA Left (+) TCV (SA)

Brake Demand

Secondary Circuit

Signal

6ATC/ESP Indicator

and ATC ORS TPMS Ground PMV SA Right CMN PMV AA Left CMN PMV Trailer HLD

7J1939 High PMV SA Right REL PMV AA Left REL Sensor CAN Low

8J1939 Low WSS SA Left (‑) Stop Lamp Output Sensor CAN High

9 SLS Input TPMS

Communications PMV DA Right CMN PMV AA Right CMN PMV Trailer REL

10 WSS DA Right (+) PMV DA Right HLD PMV AA Right HLD Sensor CAN Common

11 WSS DA Right (‑) WSS SA Right (+) WSS AA Left (+) Sensor CAN Supply

12 ABS Indicator

Ground Reserved PMV DA Left CMN WSS AA Right (+) PMV Trailer CMN

13 J1939 High 2 PMV DA Right REL PMV AA Right REL

14 J1939 Low 2 WSS SA Right (‑) WSS AA Left (‑)

15 ABS Indicator Interlock WSS DA Left (+) WSS AA Right (‑)

16 Battery PMV DA Left HLD

17 Retarder ATC/ESP Indicator PMV DA Left REL

18 ABS Dash Indicator ATC Disable Switch or

Diagnostic Switch WSS DA Left (‑)

*AWD vehicles only (AWD Transfer Case.)

49

ABS/ATC WIRING

Electronic Control Unit (ECU) Wiring Harness

Connectors

The Bendix® ESP® EC‑80™ Controller is designed to

interface with AMP MCP 2.8 connectors as referenced in

Figure 21. Follow all AMP requirements for the repair of

wire harnesses.

All wire harness connectors must be properly seated. The

use of secondary locks is strongly advised.

All unused ECU connectors must be covered and

receive proper environmental protection.

ABS Wiring Requirements

As a matter of good practice and to ensure maximum

system robustness, always use the maximum size wire

supported by the wire harness connectors for battery,

ignition, ground, Pressure Modulator Valve (PMV), Traction

Control Valve (TCV), Interaxle Differential Lock and

indicator lamp circuits.

All sensor and serial communications circuits (J1939) must

use twisted pair wiring (one to two twists per inch). See

the appropriate Society of Automotive Engineers (SAE)

document for additional details.

All wires must be carefully routed to avoid contact

with rotating elements. Wiring must be properly

secured approximately every 6 to 12 inches using UV

stabilized, non-metallic hose clamps or bow-tie cable

ties to prevent pinching, binding or fraying.

It is recommended that wires be routed straight out of a

connector for a minimum of three inches before the wire

is allowed to bend.

Battery and ground wires should be kept to a minimum

length.

If convoluted tubing is used, its I.D. must match the size

of the wire bundle as closely as possible.

Wire harness lengths must be carefully selected for

the vehicle. Excess lengths of wire are not to be

wound to form coils, instead re-route, repair or replace

wire harness to avoid the possibility of electrical

interference and wire damage. Do not attempt to

stretch harnesses that are too short, since mechanical

strain can result in wire breakage.

Bendix® SAS-60™ Sensors and YAS-60™, or

YAS-70X™, Sensor Wiring

If it is necessary to replace the wiring that connects the

Bendix SAS‑60 or the Yaw Rate sensor to the ECU, it

is important to use the same wiring as that used by the

vehicle OEM.

Troubleshooting: Wiring

50

ABS Component Connector Wire Terminal Wire Seal/

Plug Terminal

Lock Terminal Crimp Tool

In‑Cab Controller Harness

17‑Way AMP

MCP 2.8 (X1) 1718091‑1

927768‑9

1 ‑ 2.5 mm2

X1‑12 & 18

968874

2.5 ‑ 4 mm2

968873

1.0 ‑ 2.5 mm2

N/A

967634

539723‑2

In‑Cab Controller Harness

18‑Way AMP

MCP 2.8 (X2) 8‑968974‑1

N/A

In‑Cab Controller Harness

15‑Way AMP

MCP 2.8 (X3) 8‑968973‑1

Controller Harness

12‑Way AMP

MCP 2.8 (X4) 8‑968972‑1

ABS Modulator Harness

AMP Twist‑Lock

(Bayonet) 1‑967325‑2

929975‑1

N/A

539635‑1

ATC Modulator Harness

AMP Twist‑Lock

(Bayonet) 1‑967325‑3

ABS Modulator Harness

3‑pin Packard

Metri‑Pack

280 Series 12040977 12077411 12015323 12034145 12155975

TE® Connectivity / AMP Terminal Removal Tool. Newark® Part

No. 78H0240. Manufacturer Part Number 1‑1579007‑6

Bendix® WS-24™ Wheel Speed Sensor Connectors

Packard® GT

150 series Packard

Metripack 150.2

series

Deutsch®

DTM06 series Packard

Metripack 280

series (female)

Packard

Metripack 280

series (male)

Deutsch DT04

series Standard round

two pin

Yaw Rate Sensor Wire Harness Connectors (4 contact):

Straight Connector: Schlemmer® 9800 351 (shown)

AMP® Connector 2‑967325‑1

ITT® Cannon® Connector 121583‑001

90 degree Connector: Schlemmer 9800 331

Yaw Rate Sensor Wire Harness

Contact Pin Terminals:

Schlemmer 7814 125

AMP 0‑962981‑1

ITT Cannon 031‑8717‑120

Bendix® SAS-60™ Sensor Connectors:

Robert Bosch® 1 928 404 025,

Robert Bosch 1 928 498 001

One Meter Adapter to Connector:

Bendix 5015242 (shown)

Packard 12092162, pins 12064971

Brake Demand Sensor/Load Sensor

Wire Harness Connectors:

Metri‑Pack® (Packard) 1206 5287

Contact Pins:

Packard 1210 3881

FIGURE 21 - BENDIX ESP® EC‑80™ CONTROLLER COMPONENT CONNECTORS

51

Wheel Speed Sensor Wiring

Route sensor wiring coming out of the wheel ends away

from moving brake components. Sensor wiring needs to

be secured to the axle to prevent excess cable length and

wiring damage. It is required that cable ties be installed

to the sensor wire within 3 inches (76.2 mm) of the sensor

head to provide strain relief.

Following the axle, the sensor wires must be attached

along the length of the service brake hoses using cable ties

with ultraviolet protection and secured every 6 to 8 inches

(152 to 203 mm). Sufcient – but not excessive – cable

length must be provided to permit full suspension travel and

steering axle movement. Install wires so that they cannot

touch rotating elements such as wheels, brake discs or

drive shafts. Radiation protection may be necessary in

the area of brake discs.

FIGURE 22 - BENDIX® WS‑24™ WHEEL SPEED SENSOR INSTALLATION (S‑CAM AND AIR DISC BRAKE)

Speed Sensor

Mounting Block

100 Tooth (typical)

Speed Sensor

Exciter Ring

WS-24™ Speed

Sensor

Hub Assembly

WS-24™ Speed

Sensor

100 Tooth

Exciter

Ring

Mounting

Block

Max. Gap

(Sensor to Exciter)

.015 Inches

Brake Drum

Bendix does not recommend using standard tie‑wraps to

secure wiring harnesses directly to rubber air lines. This

may cause premature wiring failure from the pressure

exerted on the wiring when air pressure is applied through

the air line. Non‑metallic hose clamps or bow‑tie tie‑wraps

are preferred.

The use of grommets or other suitable protection is

required whenever the cable must pass through metallic

frame members.

All sensor wiring must utilize twisted pair wire, with

approximately one to two twists per inch.

It is recommended that wires be routed straight out of a

connector for a minimum of three inches before the wire

is allowed to bend.

90° Speed

Sensors

Straight Speed

Sensors

Sensor

Clamping

Sleeve

Troubleshooting: Wiring (Continued)

Air Disc Brake

Note: Ensure that the sensor wiring is

routed to avoid chang from moving

parts (including rotors and steering

components.)

52

FIGURE 23 - STANDARD WIRING SCHEMATIC FOR ECUs LISTED ABOVE

Troubleshooting: Wiring Schematic A

11

2

9

11

19 CAN SENSOR WIRING - 18 AWG (FOUR CONDUCTOR TWISTED WIRE REQUIRED).

1. RETARDER CONTROL VIA RELAY OR SAE J1939.

2 DIAGNOSTICS PER SAE J1587 OR J1939.

3 DIAGNOSTIC BLINK CODE SWITCH (MOMENTARY SWITCH).

4 ATC ENGINE CONTROL PER SAE J1939.

5A

5A

5 PRESSURE MODULATOR VALVE (PMV): BENDIX M-32, M-32QR, M-40X

7 WHEEL SPEED SENSOR (WSS): BENDIX WS-24

9 TRACTION CONTROL VALV E (TCV).

10 SERIAL COMMUNICATIONS - 18 AW G (TWISTED PA IR REQUIRED).

NOTES

AA

8

19

J1587 B

J1587 A

J1939_LO

J1939_HI

BATTERY

RETARDER

GROUND

ADDITIONAL AXLE 21

11

16. THIS SYSTEM WIRING CONNECTION SCHEMATIC IS FOR AN EC-80 ECU DESIGNED AS A SERVICE REPLACEMENT FOR EC-60 ADVANCED.

17 POLE

18 POLE

15 POLE

WSS

DRIVE

AXLE

RIGHT

WSS

DRIVE

AXLE

LEFT

WSS

STEER

AXLE

RIGHT

IGNITION

TRAILER ABS IND.

ABS IND.

SLS INPUT

WSS_DR+

WSS_DR-

WSS_DL+

WSS_DL-

13 14 7816 17 13218 910 11 15 18

30A

WSS

STEER

AXLE

LEFT

DIFF

LOCK

SOL

PMV_DR_HLD

PMV_DR_REL

PMV_DR_CMN

PMV_DL_HLD

PMV_DL_REL

PMV_DL_CMN

PMV_SR_HLD

PMV_SR_REL

PMV_SR_CMN

PMV_SL_HLD

PMV_SL_REL

PMV_SL_CMN

9

TRACTION

CONTROL

VALV E

ABS ORS

WSS_SR+

WSS_SR-

WSS_SL+

WSS_SL-

10 13

916 17

12 47612

31

11 14 58

WSS_AR+

WSS_AR-

WSS_AL+

WSS_AL-

5A

DIFF

PMV_AR_HLD

PMV_AR_REL

PMV_AR_CMN

ST

OP LAMP OUTPUT

TCV_SA_CMN

TCV_SA

12 15 11 14

23

5

810 13

9

WSS

ADD

AXLE

RIGHT

WSS

ADD

AXLE

LEFT

6

17 WHEN X1 IS DISCONNECTED FROM ECU, THE INTERLOCK SHORTS THE INDICATOR CIRCUIT TO GROUND, ILLUMINATING THE

ABS INDICATOR.

STOP LAMP

TRAILER ABS

DASH INDICATOR

6 PMV CONNECTOR TWIST-LOCK PACKARD

COMMON (CMN) PIN 2 PIN B

HOLD (HLD) PIN 3 PIN C

RELEASE (REL) PIN 1 PIN A

8 WSS WIRING - 18 AWG (TWISTED PAIR REQUIRED).

5A

18

20

20 MOMENTARY SWITCH.

18 STOP LAMP SWITCH INPUT REQUIRED FOR ATC AND ALL-WHEEL DRIVE VEHICLES.

MAY BE PROVIDED VIA HARDWARE INPUT OR J1939 COMMUNICAT ION.

20

21 ADDITIONAL AXLE WSS AND PMV INSTALLED PER EC-80 CONFIGURATION (6S/4M, 6S/6M).

ESP/ATC

DASH

INDICATOR

ABS DASH

INDICATOR

12

STOP LAMP

RELAY

18

6 6 6

5 5 5

7 7

77

7

15

IND. INTERLOCK

7

4

5A

11

X2

X2

5A

(OPTIONAL)

RETARDER RELAY

X3

X3

8

1010 88 8 8

X1

X1

11 DOTTED LINES: SPECIAL FUNCTION (OPTIONS).

X1

X2

X3

15. PRODUCT SPECIFICAT ION: Y119679

14. ALL WIRE IS CONDUCTOR CROSS-SECTION OF 16 AWG, UNLESS OTHERWISE NOTED.

321 321 321 321

6

5

11

5

DRIVE

AXLE

RIGHT

PMV

DRIVE

AXLE

LEFT

PMV

STEER

AXLE

LEFT

PMV

STEER

AXLE

RIGHT

PMV

321

ADD

AXLE

RIGHT

PMV

12 BATTERY AND GROUND - 12 AWG

3

+12V IGNITION

2

8-968974-1

8-968973-1

DRIVE AXLE STEER AXLE

17

12

13 ALL WHEEL DRIVE VEHICLES ONLY. REQUIRES STOP LAMP INPUT (SEE NOTE 18 ).

13

1718091-1

AMP

CONNECTOR

PART NUMBER

REF. NO. NUMBER OF

CONTACTS

WIRE HARNESS CONNECTORS

10

8

711 3

12

4

5

ABS IND. GND

TRAC

CONTROL

VALV E

(TCV)

TCV_DA

TCV_DA_CMN

54

+12V BATTERY

ADDITIONAL

R

L

VEHICLE 6 X 4

R

L

STEER

SA

DRIVE

DA

ATC

OFF-ROAD

SWITCH

(ORS)

ESP/ATC IND.

6

X4

X4

12

STEER

AXLE

PS_CMN

PS_SIG 1

PS_SIG 3

PS_SPL

PS_SIG 2

CAN_SEN_LO

CAN_SEN_HI

CAN_SEN_CMN

CAN_SEN_SPL

PMV_AL_HLD

PMV_AL_REL

PMV_AL_CMN

47

6

6

32 1

5

PRESSURE

SENSOR 1

(PRIMARY

DELIVERY)

PRESSURE

SENSOR 3

(SUSPENSION)

PRESSURE

SENSOR 2

(SECONDARY

DELIVERY)

STEERING

ANGLE

SENSOR

YAW

RATE

SENSOR

6

X4 12 POLE 8-968972-1

PMV_TR_HLD

PMV_TR_REL

PMV_TR_CMN

612 9

321

PMV

TRAILER

ADD

AXLE

LEFT

PMV

STOP LAMP SWITCH

(SLS)

ABS

OFF-ROAD

SWITCH

(ORS)

5

Use this page for the following

Electronic Control Unit (ECU) part

numbers:

K098920R000

K098921R000

K103428R000

K103429R000

K105094R000

K105095R000

K105096R000

K105097R000

See next page for the alternate wiring

schematic for one other part number.

53

Troubleshooting: Wiring Schematic B (Alternate)

Use the wiring schematic on this

page for the following Electronic

Control Unit (ECU) part number:

K105303R000

See the previous page for a

second list of ECU part numbers.

If your ECU part number does

not appear on either list, please

call 1‑800‑AIR‑BRAKE, option 2,

and speak with the Tech Team.

FIGURE 24 - CAB WIRING SCHEMATIC FOR ECU LISTED ABOVE

16

16

3

4

20 ADDITIONAL AXLE WSS AND PMV INSTALLED PER EC-80 CONFIGURATION (6S/4M, 6S/6M).

21. ABS/ESP/TRAILER LAMP VIA J1939.

22. NO ABS OFF ROAD SWITCH. ABS OFF ROAD ACTIVATED WITH ATC MUD AND SNOW.

9

19 CAN SENSOR WIRING - 18 AWG (FOUR CONDUCTOR TWISTED WIRE REQUIRED).

HSA

DISABLE

SWITCH

5A

16

ATC

LAMP

1. RETARDER CONTROL VIA SAE J1939.

2 DIAGNOSTICS VIA SAE J1939.

3 MOMENTARY SWITCH.

4 ATC ENGINE CONTROL PER SAE J1939.

5 PRESSURE MODULATOR VALVE (PMV): BENDIX M-32, M-32QR, M-40X.

7 WHEEL SPEED SENSOR (WSS): BENDIX WS-24.

9 TRACTION CONTROL VALVE (TCV).

10 SERIAL COMMUNICATIONS - 18 AWG (TWISTED PAIR REQUIRED).

NOTES:

AA

8

19

CAN HI 2

CAN LO 2

J1939_LO

J1939_HI

BATTERY

ATC IND

GROUND

ADDITIONAL AXLE 20

11

16 TPMS WIRING - 3 WIRES.

17 POLE

18 POLE

15 POLE

WSS

DRIVE

AXLE

RIGHT

WSS

DRIVE

AXLE

LEFT

WSS

STEER

AXLE

RIGHT

IGNITION

HSA DISABLE

ATC DIS OR DIAG

SW

TPMS COMM

WSS_DR+

WSS_DR-

WSS_DL+

WSS_DL-

13 14 7816 17 13218 910 11 15 18

30A

WSS

STEER

AXLE

LEFT

HSA

SOL

PMV_DR_HLD

PMV_DR_REL

PMV_DR_CMN

PMV_DL_HLD

PMV_DL_REL

PMV_DL_CMN

PMV_SR_HLD

PMV_SR_REL

PMV_SR_CMN

PMV_SL_HLD

PMV_SL_REL

PMV_SL_CMN

9

TRACTION

CONTROL

VALV E

TPMS PWR

WSS_SR+

WSS_SR-

WSS_SL+

WSS_SL-

10 13

916 17

12 47612

31

11 14 58

WSS_AR+

WSS_AR-

WSS_AL+

WSS_AL-

HSA SOLENOID

PMV_AR_HLD

PMV_AR_REL

PMV_AR_CMN

TCV_SA_CMN

TCV_SA

12 15 11 14

23

5

810 13

9

WSS

ADD

AXLE

RIGHT

WSS

ADD

AXLE

LEFT

6

17. WHEN X1 IS DISCONNECTED FROM ECU, BODY CONTROLLER NEEDS TO ILLUMINATE ABS INDICATOR.

HSA

LAMP

6 PMV CONNECTOR TWIST-LOCK PACKARD

COMMON (CMN) PIN 2 PIN B

HOLD (HLD) PIN 3 PIN C

RELEASE (REL) PIN 1 PIN A

8 WSS WIRING - 18 AWG (TWISTED PAIR REQUIRED).

18

18 STOP LAMP SWITCH INPUT REQUIRED FOR ATC AND ALL-WHEEL DRIVE VEHICLES.

IS PROVIDED VIA STOP LAMP SWITCH VIA J1939 COMMUNICATION.

12

6 6 6

5 5 5

7 7

77

7

15

IND. INTERLOCK

7

2

X2

X2

X3

X3

8

1010 88 8 8

X1

X1

11 DOTTED LINES: SPECIAL FUNCTION (OPTIONS).

X1

X2

X3

15. PRODUCT SPECIFICATION: Y119679 AND Y173755.

14. ALL WIRE IS CONDUCTOR CROSS-SECTION OF 16 AWG, UNLESS OTHERWISE NOTED.

321 321 321 321

6

5

5

DRIVE

AXLE

RIGHT

PMV

DRIVE

AXLE

LEFT

PMV

STEER

AXLE

LEFT

PMV

STEER

AXLE

RIGHT

PMV

321

ADD

AXLE

RIGHT

PMV

12 BATTERY AND GROUND - 12 AWG.

+12V IGNITION

8-968974-1

8-968973-1

DRIVE AXLE STEER AXLE

17

12

13. ALL WHEEL DRIVE VEHICLES ONLY. REQUIRES STOP LAMP INPUT (SEE NOTE 18 ).

1718091-1

AMP

CONNECTOR

PART NUMBER

REF. NO. NUMBER OF

CONTACTS

WIRE HARNESS CONNECTORS

10

8

711 3

12

4

5

NOT CONNECTED

TRAC

CONTROL

VALV E

(TCV)

TCV_DA

TCV_DA_CMN

54

+12V BATTERY

ADDITIONAL

R

L

VEHICLE 6 X 4

R

L

STEER

SA

DRIVE

DA

TPMS GND

6

X4

X4

12

STEER

AXLE

PS_CMN

PS_SIG 1

PS_SIG 3

PS_SPL

PS_SIG 2

CAN_SEN_LO

CAN_SEN_HI

CAN_SEN_CMN

CAN_SEN_SPL

PMV_AL_HLD

PMV_AL_REL

PMV_AL_CMN

47

6

6

32 1

5

PRESSURE

SENSOR 1

(PRIMARY

DELIVERY)

PRESSURE

SENSOR 3

(SUSPENSION)

PRESSURE

SENSOR 2

(SECONDARY

DELIVERY)

YAW

RATE

SENSOR

6

X4 12 POLE 8-968972-1

PMV_TR_HLD

PMV_TR_REL

PMV_TR_CMN

612 9

321

PMV

TRAILER

ADD

AXLE

LEFT

PMV

5

ATC DISABLE

OR

DIAGNOSTIC

SWITCH

ATC

MUD

& SNOW

3

I/0

54

ABS — Antilock Brake System.

ABS Event — Impending wheel lock situation that causes the

ABS Controller to activate the modulator valve(s).

ABS Indicator Lamp — An amber lamp which indicates the

operating status of an antilock system. When the indicator lamp

is on, ABS is disabled and the vehicle reverts to normal brake

operation.

Air Gap — Distance between the Sensor and tone ring.

ASR — Automatic Slip Regulation. Another name for traction

control.

ATC — Automatic Traction Control. An additional ABS function

in which engine torque is controlled and brakes are applied

differentially to enhance vehicle traction.

ATC/ESP Lamp — A lamp that indicates when stability functions,

including traction control, roll stability program or yaw control

are operating.

Channel — A controlled wheel site.

CAN — Controller Area Network. J1939 is an SAE version of

the CAN link.

Clear Codes — System to erase historical Diagnostic Trouble

Codes (DTCs) from the ECU, from either the Diagnostic Switch

or from a hand‑held diagnostic tool (only repaired DTCs may

be cleared).

Conguration — The primary objective is to identify a “normal”

set of sensors and modulators for the Electronic Control Unit,

so that it will identify future missing sensors and modulators.

Diagnostic Connector — Diagnostic receptacle in vehicle cab

for connection of J1939 hand‑held or PC based test equipment.

The tester can initiate test sequences, and can also read system

parameters.

Diagnostic Switch — A switch used to activate blinks codes.

Differential Braking — Application of brake force to a spinning

wheel so that torque can be applied to wheels which are not

slipping.

ECU — Electronic Control Unit.

ESP — Electronic Stability Program. Full stability function that

includes RSP & YC subfunctions.

Diagnostic Trouble Code — A condition that interferes with the

generation or transmission of response or control signals in the

vehicle's ABS system that could lead to the functionality of the

ABS system becoming inoperable in whole or in part.

FMVSS-121 — Federal Motor Vehicle Safety Standard which

regulates air brake systems.

Hill Start (or “Hill Start Assist”) HS/HSA — This feature

interfaces between the transmission and braking system to help

the driver prevent the vehicle from rolling downhill when moving

up a steep incline from a stationary position.

IR — Independent Regulation. A control method in which a

wheel is controlled at optimum slip, a point where retardation

and stability are maximized. The brake pressure that is best

for the wheel in question is directed individually into each brake

chamber.

J1939 — A high speed data link used for communications

between the ABS ECU engine, transmission and retarders.

LAS — Lateral Acceleration Sensor.

MIR — Modied Independent Regulation. A method of controlling

the opposite sides of a steer axle during ABS operation so that

torque steer and stopping distance are minimized.

PLC — Power Line Carrier. The serial communication protocol

used to communicate with the trailer over the blue full time

power wire.

PMV — Pressure Modulator Valve. An air valve which is used

to vent or block air to the brake chambers to limit or reduce

brake torque.

QR — Quick Release. Quick release valves allow faster release

of air from the brake chamber after a brake application. To

balance the system, quick release valves have hold off springs

that produce higher crack pressures (when the valves open).

Relay Valve — Increases the application speed of the service

brake. Installed near brakes with larger air chambers (type 24

or 30). The treadle valve activates the relay valve with an air

signal. The relay valve then connects its supply port to its delivery

ports. Equal length air hose must connect the delivery ports of

the relay valve to the brake chambers.

Retarder Relay — A relay which is used to disable a retarder

when ABS is triggered.

RSP — Roll Stability Program. An all‑axle ABS solution that

helps reduce vehicle speed by applying all vehicle brakes as

needed, reducing the tendency to roll over.

SAS — Steering Angle Sensor.

Sensor Clamping Sleeve — A beryllium copper sleeve which

has ngers cut into it. It is pressed between an ABS sensor and

mounting hole to hold the sensor in place.

Stored Diagnostic Trouble Codes — A DTC that occurred in

the past.

TCS — Traction Control System, another name for ATC or ASR.

TCV — Traction Control Valve.

Tone Ring — A ring that is usually pressed into a wheel hub that

has a series of teeth (usually 100) and provides actuation for the

speed sensor. Note maximum run out is .008.

YC — Yaw Control. Helps stabilize rotational dynamics of vehicle.

YRS — Yaw Rate Sensor.

GLOSSARY

55

APPENDIX A: TROUBLESHOOTING A 12-7 BLINK CODE, EQUIVALENT TO A

(SID-93 FMI-4) (SPN-0802 FMI-04) DIAGNOSTIC TROUBLE CODE (DTC)

Bendix® EC-80™ ESP® Electronic Control Unit (ECU)

1) Remove the X1, X2, X3 and X4 connectors from the ECU.

2) Using X1‑1 as the ground connection, check for resistance

for the entire X2 connector. There should be no resistance

to ground found. Please ll out worksheet on this page.

3) Using X1‑1 as the ground connection, check for resistance

for X1‑4 and X1‑5. There should be no resistance to ground.

4) Using X1‑1 as the ground connection, check for resistance for

X3‑4, X3‑6, X3‑7, X3‑9, X3‑10, X3‑13, X3‑3 and X3‑5. There

should be no resistance to ground. (Even if the vehicle is not

congured for 6S/6M).

5) Using X1‑1 as the ground connection, check for resistance

for X4‑6, X4‑9 and X4‑12. There should be no resistance to

ground.

6) Troubleshoot any pin that has resistance to ground. If no

issues are found continue to step 7.

7) Reconnect the X1 connector only and apply IGN power to the

ECU and using the DTC screen of Bendix® ACom® Diagnostic

Software, clear all DTCs. Re‑check for any DTCs. If the

12‑7 DTC is still present, the problem is the Traction Solenoid

Wiring or Solenoid.

8) If the 12‑7 DTC does not reappear, remove power and connect

the X2 connector, reapply power, then clear all DTCs. If the

12‑7 DTC is no longer present, connect the X3 connector

and clear all DTCs.

9) If at this point the 12‑7 DTC is not present, the problem is

with the X4 connector.

For Peterbilt® & Kenworth® Trucks Only:

10) Clear all DTCs. If the 12‑7 DTC reappears, the issue is

on the X4 connector. Otherwise, proceed to the next step.

11) Disconnect all modulators and the traction solenoid.

Clear all DTCs. If the DTC does not reappear, connect

one modulator and Traction Solenoid at a time, until the

DTC reappears. Otherwise, continue to the next step.

12) Make sure all modulators and the traction solenoid are

connected. Disconnect the ABS bulkhead connector at

the engine (top‑left side) and remove Pins 1, 2, 11 &12.

Reconnect the connector and apply IGN power to the

ECU. Using Bendix ACom Diagnostics, clear all DTCs.

If the 12‑7 DTC returns, the problem is either the wiring

harness inside the cab or the ECU.

Record Resistances

Below:

X1-1 for ground point

X1 Pin Resistance

X1‑4

X1‑5

X2 Pin Resistance

X2‑1

X2‑2

X2‑3

X2‑4

X2‑5

X2‑6

X2‑7

X2‑8

X2‑9

X2‑10

X2‑11

X2‑12

X2‑13

X2‑14

X2‑15

X2‑16

X2‑17

X2‑18

X3 Pin Resistance

X3‑4

X3‑5

X3‑6

X3‑7

X3‑8

X3‑9

X3‑10

X3‑13

X4 Pin Resistance

X4‑6

X4‑9

X4‑12

4

56

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX

®

BLINK CODE EQUIVALENTS

SPN

(J1939) FMI

(J1939)

Bendix® Blink Code

Equivalent(s) Diagnostic Trouble Code (DTC) Description Lamp Status

(1st

Digit) (2nd

Digit) ABS ATC/

ESP

‑ 1 1 No DTCs ‑ ‑

Power Supply DTCs

168 3 6 2 Battery Voltage Too High ON ON

168 4 6 1 Battery Voltage Too Low ON ON

Miscellaneous DTCs

564 3 25 3 Differential Lock Solenoid Shorted To Voltage ON ON

564 4 25 2 Differential Lock Solenoid Shorted To Ground ON ‑

564 5 25 1 Differential Lock Solenoid Open ON ‑

564 13 25 7 Output Conguration Error ‑ Differential ON ‑

575 14 12 17 ABS Disabled Due To Special Mode Or Off‑Road ABS Active.

Note: The ABS warning lamp will be ashing indicating the is in ABS off-

road mode ‑ ON

576 14 12 3 ATC or ESP Disabled or Dynamometer Test Mode Active ON ‑

614 3 12 32 I/O 2 or 3 Shorted High (EC‑80 ATC) OR

I/O 2 or 3 Shorted High or Stop Lamp Output Error (ESP EC‑80) ‑ ON

614 3 25 6 I/O 3 Shorted to Voltage ‑ ON

614 4 25 5 I/O 3 Shorted to Ground ‑ ON

614 5 25 4 I/O 3 Open Circuit ‑ ON

614 13 25 8 Output Conguration Error ‑ I/O 3 ‑ ON

615 14 12 19 Maximum Number of Pressure Modulator Valve (PMV) Cycles Exceeded ‑ ‑

615 14 12 20 Maximum Number of Traction Control Valve (TCV) Cycles Exceeded ‑ ‑

614 3 12 32 I/O 2 or 3 Shorted High (EC‑80 ATC) OR

I/O 2 or 3 Shorted High or Stop Lamp Output Error (ESP EC‑80) ‑ ON

614 3 25 6 I/O 3 Shorted to Voltage ‑ ON

614 4 25 5 I/O 3 Shorted to Ground ‑ ON

614 5 25 4 I/O 3 Open Circuit ‑ ON

614 13 25 8 Output Conguration Error ‑ I/O 3 ‑ ON

615 14 12 19 Maximum Number of PMV Cycles Exceeded ‑ ‑

615 14 12 20 Maximum Number of TCV Cycles Exceeded ‑ ‑

ECU DTCs (Also see other 629 codes)

629 2 13 4 ECU DTC (2678C) ON ON

629 2 13 5 ECU DTC (1C) ON ON

629 2 13 7 Conguration Mismatch ON ON

629 2 13 17 ECU DTC (C8C) ON ON

Miscellaneous DTCs

629 8 12 29 Air System / Mechanical Component ON ON

ECU DTCs (Also see other 629 codes)

629 12 13 3 ECU DTC (10) ON ON

629 12 13 14 ECU DTC (C6) ON ON

629 12 13 15 ECU DTC (CF) ON ON

629 12 13 16 ECU DTC (C0) ON ON

Miscellaneous DTCs

629 14 12 28 Air System / Mechanical Component ON ON

629 14 12 30 ESP Disabled Due to Off‑Road Mode ‑ ON

57

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX

®

BLINK CODE EQUIVALENTS

SPN

(J1939) FMI

(J1939)

Bendix® Blink Code

Equivalent(s) Diagnostic Trouble Code (DTC) Description Lamp Status

(1st

Digit) (2nd

Digit) ABS ATC/

ESP

ECU DTCs (Also see other 629 codes)

629 14 13 1 ECU DTC (5FC) ON ON

630 12 13 6 ECU DTC(6CD) ON ON

630 12 13 10 ECU DTC (5F3) ON ON

630 12 13 19 ECU DTC (63) ‑ ‑

630 12 13 20 ECU DTC (6E) ON ON

630 12 13 28 ECU DTC (7CD) ON ON

630 13 13 2 ECU DTC (5CD) ON ON

630 13 13 8 ECU DTC (56) ON ON

630 13 13 9 ECU DTC (CA3C) ON ON

630 13 13 18 ECU DTC (CC) ON ON

630 13 13 21 ECU DTC (6C) ON ON

630 13 13 22 ECU DTC (63C) ON ON

630 13 13 25 VIN Mismatch ‑ ON

630 13 13 26 Valve Conguration Mismatch ‑ ON

630 13 13 29 ECU DTC (5D) ON ON

630 14 13 13 Conguration Mismatch ON ON

J1939 DTCs

639 2 11 2 J1939 Electronic Retarder Time‑out or Invalid Signal ON ON

639 2 11 3 J1939 Electronic Engine Controller 1 Time‑out or Invalid Signal ‑ ON

639 2 11 4 J1939 Electronic Engine Controller 2 Time‑out or Invalid Signal ‑ ON

639 2 11 5 J1939 AIR Message Time‑out or Invalid Signal ‑ ON

639 2 11 6 ESP J1939 CAN Message Time‑out ‑ ON

639 2 11 7 Time‑out or Invalid CAN Data for ETC7/VP15 ‑ ‑

639 2 11 8 Time‑out or Invalid Data on XBR ‑ ‑

639 2 11 10 J1939 Electronic Transmission Controller 1 Time‑out or Invalid Signal ON ‑

639 2 11 11 AUXIO CAN Message Time‑out ‑ ‑

639 2 11 12 J1939 Hill Start Aid Switch Signal Not Available ‑ HSA LAMP ON ‑ ‑

639 2 11 14 J1939 CAN Message Related to ESP is Incomplete ‑ ON

639 2 11 15 J1939 Electronic Engine Controller 3 Time‑out or Invalid Signal ‑ ON

639 2 11 16 J1939 Electronic Transmission Controller 2 Time‑out ‑ ON

639 2 11 20 J1939 EAC1 Time‑out or Invalid Signal ‑ ON

639 2 11 21 CAN Message CGW_C1 Time‑out or Invalid Signal ‑ ON

639 2 11 22 CAN Message ASC1_CLCS Time‑out or Invalid Signal ‑ ON

639 2 11 23 J1939 CCVS Time‑out or Invalid Signal ‑ ON

639 2 11 24 J1939 TCO(Tachograph) Time‑out ‑ ON

639 2 11 28 J1939 Proprietary XBR Message Out‑of‑Range ‑ ON

639 2 26 1 J1939 CAN Time‑out of ESP Message ‑ ON

639 2 26 2 Time‑out or Invalid CAN Data – CCVS 2 ESP Message ‑ ON

639 2 26 3 Time‑out or Invalid CAN Data – Electronic Engine Controller 1 ESP

Message ‑ ON

639 2 26 4 Time‑out or Invalid CAN Data – EEC2 ESP Message ‑ ON

639 2 26 5 Time‑out or Invalid CAN Data – Driveline Line Retarder ESP Message ‑ ON

639 2 26 6 Time‑out or Invalid CAN Data – Engine Retarder ESP Message ‑ ON

639 2 26 7 Time‑out or Invalid CAN Data – Exhaust Retarder ESP Message ‑ ON

639 2 26 8 Time‑out or Invalid CAN Data – PROP XBR ESP Message ‑ ON

639 2 26 9 Time‑out or Invalid CAN Data – Transmission Retarder ESP Message ‑ ON

639 2 26 10 Time‑out or Invalid CAN Data – Electronic Transmission Controller 1 ESP

Message ‑ ON

639 2 26 11 Time‑out or Invalid AUX I/O – ESP Message ‑ ON

639 2 26 12 Time‑out or Invalid Data for Conguration of Electronic Engine Controller 1

ESP Message ‑ ON

58

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX

®

BLINK CODE EQUIVALENTS

SPN

(J1939) FMI

(J1939)

Bendix® Blink Code

Equivalent(s) Diagnostic Trouble Code (DTC) Description Lamp Status

(1st

Digit) (2nd

Digit) ABS ATC/

ESP

639 2 26 13 Invalid Data Transfer Time‑out of EC1 ESP Message ‑ ON

639 2 26 14 Time‑out or Invalid Data for Conguration of Driveline Line Retarder ESP

Message ‑ ON

639 2 26 15 Time‑out or Invalid CAN Data – Electronic Engine Controller ESP Message ‑ ON

639 2 26 16 Time‑out or Invalid CAN Data – Electronic Transmission Controller 2‑

Message Required for ESP ‑ ON

639 2 26 17 Time‑out or Invalid Data for Conguration of Engine Retarder ESP Message ‑ ON

639 2 26 18 Time‑out or Invalid Data for Conguration of Exhaust Retarder ESP

Message ‑ ON

639 2 26 19

Time‑out or Invalid Data for Conguration of Transmission Retarder ESP Message

‑ ON

639 2 26 20 Invalid Data Transfer Time‑out of Driveline Line Retarder ESP Message ‑ ON

639 2 26 21 Invalid Data Transfer Time‑out of Engine Retarder ESP Message ‑ ON

639 2 26 22 Invalid Data Transfer Time‑out of Exhaust Retarder ESP Message ‑ ON

639 2 26 23 Time‑out or Invalid CAN Data – CCVS ESP Message ‑ ON

639 2 26 24 Time‑out or Invalid CAN Data – TCO ESP Message ‑ ON

639 2 26 25 Invalid Data Transfer Time‑out of Driveline Line Retarder ESP Message ‑ ON

639 2 26 26 ESP Related CM3 Time‑out at J1939 ‑ ON

639 2 26 27 Time‑out of message or Invalid Data Received from Transmission Transfer

information on J1939 ‑ Message Required for ESP ‑ ON

639 2 26 28 Time‑out or Invalid CAN Data – Electronic Axle Controller 1ESP Message ‑ ON

639 5 11 29 J1939 CAN Messages Are Not Being Transmitted / Received ON ON

639 12 11 1 J1939 Serial Link ON ON

Wheel Speed Sensor DTCs

789 1 2 1 Steer Axle Left WSS Excessive Air Gap ON ON

789 2 2 3 Steer Axle Left WSS Open or Shorted ON ON

789 7 2 5 Steer Axle Left WSS Wheel End ON ON

789 8 2 6 Steer Axle Left Erratic Sensor Signal ON ON

789 9 2 2 Steer Axle Left WSS Signal Low at Drive Off ON ON

789 10 2 4 Steer Axle Left WSS Loss of Sensor Signal ON ON

789 13 2 7 Steer Axle Left WSS Tire Size Calibration ON ON

790 1 3 1 Steer Axle Right WSS Excessive Air Gap ON ON

790 2 3 3 Steer Axle Right WSS Open or Shorted ON ON

790 7 3 5 Steer Axle Right WSS Wheel End ON ON

790 8 3 6 Steer Axle Right Erratic Sensor Signal ON ON

790 9 3 2 Steer Axle Right WSS Signal Low at Drive Off ON ON

790 10 3 4 Steer Axle Right WSS Loss of Sensor Signal ON ON

790 13 3 7 Steer Axle Right WSS Tire Size Calibration ON ON

791 1 4 1 Drive Axle Left WSS Excessive Air Gap ON ON

791 2 4 3 Drive Axle Left WSS Open or Shorted ON ON

791 7 4 5 Drive Axle Left WSS Wheel End ON ON

791 8 4 6 Drive Axle Left Erratic Sensor Signal ON ON

791 9 4 2 Drive Axle Left WSS Signal Low at Drive Off ON ON

791 10 4 4 Drive Axle Left WSS Loss of Sensor Signal ON ON

791 13 4 7 Drive Axle Left Tire Size Calibration ON ON

792 1 5 1 Drive Axle Right WSS Excessive Air Gap ON ON

792 2 5 3 Drive Axle Right WSS Open or Shorted ON ON

792 7 5 5 Drive Axle Right WSS Wheel End ON ON

792 8 5 6 Drive Axle Right Erratic Sensor Signal ON ON

792 9 5 2 Drive Axle Right WSS Signal Low at Drive Off ON ON

792 10 5 4 Drive Axle Right WSS Loss of Sensor Signal ON ON

792 13 5 7 Drive Axle Right Tire Size Calibration ON ON

793 1 14 1 Additional Axle Left WSS Excessive Air Gap ON ON

59

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX

®

BLINK CODE EQUIVALENTS

SPN

(J1939) FMI

(J1939)

Bendix® Blink Code

Equivalent(s) Diagnostic Trouble Code (DTC) Description Lamp Status

(1st

Digit) (2nd

Digit) ABS ATC/

ESP

793 2 14 3 Additional Axle Left WSS Open or Shorted ON ON

793 7 14 5 Additional Axle Left WSS Wheel End ON ON

793 8 14 6 Additional Axle Left Erratic Sensor Signal ON ON

793 9 14 2 Additional Axle Left WSS Signal Low at Drive Off ON ON

793 10 14 4 Additional Axle Left WSS Loss of Sensor Signal ON ON

793 13 14 7 Additional Axle Left Tire Size Calibration ON ON

794 1 15 1 Additional Axle Right WSS Excessive Air Gap ON ON

794 2 15 3 Additional Axle Right WSS Open or Shorted ON ON

794 7 15 5 Additional Axle Right WSS Wheel End ON ON

794 8 15 6 Additional Axle Right Erratic Sensor Signal ON ON

794 9 15 2 Additional Axle Right WSS Signal Low at Drive Off ON ON

794 10 15 4 Additional Axle Right WSS Loss of Sensor Signal ON ON

794 13 15 14 Additional Axle Right Tire Size Calibration ON ON

Pressure Modulator Valve (PMV) DTCs

795 5 7 7 Steer Axle Left PMV Common Open Circuit ON ON

795 13 7 8 Steer Axle Left PMV Conguration Error ON ON

796 5 8 7 Steer Axle Right PMV Common Open ON ON

796 13 8 8 Steer Axle Right PMV Conguration Error ON ON

797 5 9 7 Drive Axle Left PMV Common Open Circuit ON ON

797 13 9 8 Drive Axle Left PMV Conguration Error ON ON

798 5 10 7 Drive Axle Right PMV Common Open Circuit ON ON

798 13 10 8 Drive Axle Right PMV Conguration Error ON ON

799 5 16 7 AA Left PMV Common Open Circuit ON ON

799 13 16 8 AA Left PMV Conguration Error ON ON

800 5 17 7 Additional Axle Right PMV Common Open Circuit ON ON

800 13 17 8 AA Right PMV Conguration Error ON ON

Miscellaneous DTCs

801 2 12 4 Retarder Relay Open Circuit or Shorted to Ground ON ‑

801 3 12 5 Retarder Relay Open Circuit or Shorted to Voltage ON ‑

Pressure Modulator Valve (PMV) DTCs

802 3 12 8 PMV Common Shorted to Voltage ON ON

802 4 12 7 PMV Commons Shorted to Ground ON ON

Miscellaneous DTCs

802 12 13 11 ECU DTC (F1A) ON ON

802 12 13 12 ECU DTC (F14) ON ‑

805 14 12 9 ATC Disabled to Prevent Brake Fade - -

Traction Control Valve (TCV) DTCs

806 3 18 2 TCV DA Solenoid Shorted to Voltage ON ON

806 4 18 1 TCV DA Solenoid Shorted to Ground ‑ ON

806 5 18 3 TCV DA Solenoid Open Circuit ‑ ON

806 13 18 4 TCV DA Valve Conguration Error ON ON

807 3 19 2 TCV SA Solenoid Shorted to Voltage ‑ ON

807 4 19 1 TCV SA Solenoid Shorted to Ground ‑ ON

807 5 19 3 TCV SA Solenoid Open Circuit ON ON

807 13 19 4 TCV SA Valve Conguration Error ON ON

Miscellaneous DTCs

810 7 12 11 Wheel Speed Sensors Reversed on an Axle ON ON

811 2 12 6 ABS Dash Indicator Circuit DTC ON ‑

811 13 12 38 Warning Lamp Ground Pin Connected to GND in Conict with Conguration

Settings ON ‑

815 13 14 10 Additional Axle WSS Conguration Error ON ON

60

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX

®

BLINK CODE EQUIVALENTS

SPN

(J1939) FMI

(J1939)

Bendix® Blink Code

Equivalent(s) Diagnostic Trouble Code (DTC) Description Lamp Status

(1st

Digit) (2nd

Digit) ABS ATC/

ESP

Pressure Modulator Valve (PMV) DTCs

932 3 7 5 Steer Axle Left PMV Hold Solenoid Shorted to Voltage ON ON

932 4 7 4 Steer Axle Left PMV Hold Solenoid Shorted to Ground ON ON

932 5 7 6 Steer Axle Left PMV Hold Solenoid Open Circuit ON ON

933 3 8 5 Steer Axle Right PMV Hold Solenoid Shorted to Voltage ON ON

933 4 8 4 Steer Axle Right PMV Hold Solenoid Shorted to Ground ON ON

933 5 8 6 Steer Axle Right PMV Hold Solenoid Open Circuit ON ON

934 3 9 5 Drive Axle Left PMV Hold Solenoid Shorted to Voltage ON ON

934 4 9 4 Drive Axle Left PMV Hold Solenoid Shorted to Ground ON ON

934 5 9 6 Drive Axle Left PMV Hold Solenoid Open Circuit ON ON

935 3 10 5 Drive Axle Right PMV Hold Solenoid Shorted to Voltage ON ON

935 4 10 4 Drive Axle Right PMV Hold Solenoid Shorted to Ground ON ON

935 5 10 6 Drive Axle Right PMV Hold Solenoid Open Circuit ON ON

936 3 16 5 AA Left PMV Hold Solenoid Shorted to Voltage ON ON

936 4 16 4 AA Left PMV Hold Solenoid Shorted to Ground ON ON

936 5 16 6 AA Left PMV Hold Solenoid Open Circuit ON ON

936 13 16 11 Output Conguration Error ‑ Left Additional Axle Hold ON ON

937 3 17 5 AA Right PMV Hold Solenoid Shorted to Voltage ON ON

937 4 17 4 AA Right PMV Hold Solenoid Shorted to Ground ON ON

937 5 17 6 AA Right PMV Hold Solenoid Open Circuit ON ON

937 13 17 11 Output Conguration Error ‑ Additional Axle Right Hold ON ON

938 3 7 2 Steer Axle Left PMV Release Solenoid Shorted to Voltage ON ON

938 4 7 1 Steer Axle Left PMV Release Solenoid Shorted to Ground ON ON

938 5 7 3 Steer Axle Left PMV Release Solenoid Open Circuit ON ON

939 3 8 2 Steer Axle Right PMV Release Solenoid Shorted to Voltage ON ON

939 4 8 1 Steer Axle Right PMV Release Solenoid Shorted to Ground ON ON

939 5 8 3 Steer Axle Right PMV Release Solenoid Open ON ON

940 3 9 2 Drive Axle Left PMV Release Solenoid Shorted to Voltage ON ON

940 4 9 1 Drive Axle Left PMV Release Solenoid Shorted to Ground ON ON

940 5 9 3 Drive Axle Left PMV Release Solenoid Open Circuit ON ON

941 3 10 2 Drive Axle Right PMV Release Solenoid Shorted to Voltage ON ON

941 4 10 1 Drive Axle Right PMV Release Solenoid Shorted to Ground ON ON

941 5 10 3 Drive Axle Right PMV Release Solenoid Open Circuit ON ON

942 3 16 2 AA Left PMV Release Solenoid Shorted to Voltage ON ON

942 4 16 1 AA Left PMV Release Solenoid Shorted to Ground ON ON

942 5 16 3 AA Left PMV Release Solenoid Open Circuit ON ON

942 13 16 10 Output Conguration Error ‑ Additional Axle Left Release ON ON

943 3 17 2 AA Right PMV Release Solenoid Shorted to Voltage ON ON

943 4 17 1 AA Right PMV Release Solenoid Shorted to Ground ON ON

943 5 17 3 AA Right PMV Release Solenoid Open Circuit ON ON

943 13 17 10 Output Conguration Error ‑ Additional Axle Right Release ON ON

Miscellaneous DTCs

1043 2 12 14 ESP sensor supply too high or too Low ‑ ON

1043 2 12 22 U‑ Bat too high or too Low for ESP sensor ‑ ON

1045 2 12 2 Stop Light Switch Defective ON ON

1045 2 12 27 Brake Lamp Input Mismatch With Brake Lamp Output ON ON

1045 7 12 1 Stop Lamp Switch Not Detected ‑ ON

61

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX

®

BLINK CODE EQUIVALENTS

SPN

(J1939) FMI

(J1939)

Bendix® Blink Code

Equivalent(s) Diagnostic Trouble Code (DTC) Description Lamp Status

(1st

Digit) (2nd

Digit) ABS ATC/

ESP

Pressure Modulator Valve (PMV) DTCs

1056 3 20 2 Trailer PMV: Release Solenoid Shorted to Voltage ON ON

1056 3 20 5 Trailer PMV: hold Solenoid Shorted to Voltage ON ON

1056 4 20 1 Trailer PMV: Release Solenoid Shorted to Ground ‑ ON

1056 4 20 4 Trailer PMV: hold Solenoid Shorted to Ground ‑ ON

1056 5 20 3 Trailer PMV: Release Solenoid Open Circuit ‑ ON

1056 5 20 6 Trailer PMV: hold Solenoid Open Circuit ‑ ON

1056 5 20 7 Trailer PMV: Common Open Circuit ‑ ON

1056 13 20 8 Trailer PMV: Conguration Error ‑ ON

Brake Demand/Load Sensor DTCs

1059 2 24 3 PS3 Open or Shorted ‑ ON

1067 2 24 1 PS1 Open or Shorted ‑ ON

1067 3 24 5 PS Supply Voltage High Error ‑ ON

1067 4 24 7 PS Supply Voltage Low Error ‑ ON

1067 6 24 8 PS Supply Voltage Error ‑ ON

1067 7 24 6 PS Not Calibrated ‑ ON

1067 11 24 4 (PS1/PS2 Plausibility Error) Brake Demand Primary and Secondary Circuit

Pressure Sensor Plausibility Error ‑ ON

1067 14 24 9 Pressure Sensor not congured. ‑ ON

1068 2 24 2 PS2 Open or Shorted ‑ ON

Miscellaneous DTCs

1238 14 12 37 ATC disable by switch ‑ ‑

Steering Angle Sensor DTCs

1807 2 21 3 SAS Static Signal ‑ ON

1807 2 21 4 SAS Signal Out of Range ‑ ON

1807 2 21 5 SAS Signal Reversed ‑ ON

1807 2 21 7 SAS Gradient Error ‑ ON

1807 2 21 9 SAS Long Term Calibration Error ‑ ON

1807 2 21 10 SAS Plausibility Check (Ref YAW Rate) ‑ ON

1807 9 21 8 SAS CAN Time‑out ‑ ON

1807 12 21 6 SAS Signal Invalid ‑ ON

1807 13 21 1 SAS Not Calibrated ‑ ON

1807 13 21 2 SAS Calibration in Progress ‑ ON

1807 13 21 11 SAS Detected But Not Congured ‑ ON

Yaw Rate Sensor DTCs

1808 2 22 1 YRS Signal Out of Range ‑ ON

1808 2 22 2 YRS Reversed Signal ‑ ON

1808 2 22 3 YRS Invalid Signal ‑ ON

1808 2 22 4 YRS Gradient Error ‑ ON

1808 2 22 6 YRS Static BITE Error ‑ ON

1808 2 22 7 YRS Dynamic BITE Error ‑ ON

1808 2 22 8 YRS Fast Calibration Error ‑ ON

1808 2 22 9 YRS Static Calibration Error ‑ ON

1808 2 22 10 YRS Normal Calibration Error ‑ ON

1808 2 22 12 YRS Plausibility Check (Ref Yaw Rate) ‑ ON

1808 2 22 13 YRS Plausibility Error (Inside Model Based Limits) ‑ ON

1808 2 22 14 YRS Plausibility Error (Outside Model Based Limits) ‑ ON

1808 2 22 16 YRS Vibration Detected ‑ ON

1808 9 22 5 YRS CAN Time‑out ‑ ON

1808 13 22 17 YRS Detected But Not Congured ‑ ON

1808 14 23 7 Erratic ESP Signal ‑ ON

62

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX

®

BLINK CODE EQUIVALENTS

SPN

(J1939) FMI

(J1939)

Bendix® Blink Code

Equivalent(s) Diagnostic Trouble Code (DTC) Description Lamp Status

(1st

Digit) (2nd

Digit) ABS ATC/

ESP

Lateral Acceleration Sensor DTCs

1809 2 23 1 LAS Signal of Range ‑ ON

1809 2 23 3 LAS Static Calibration Error ‑ ON

1809 2 23 4 LAS Long Term Calibration Error ‑ ON

1809 2 23 5 LAS Plausibility Error (Inside Model Based Limits) ‑ ON

1809 2 23 6 LAS Plausibility Error (Outside Model Based Limits) ‑ ON

1809 13 22 15 YRS‑ SAS Signal Cross‑Check Incomplete ‑ ON

1809 13 23 2 LAS Calibration in Progress ‑ ON

Miscellaneous

2011 31 11 26 ABS ECU CAN Address Conict ON ‑

2051 31 11 27 TPMS ECU CAN Address Conict ‑ TPMS INDICATOR LAMP ON ‑ ‑

HS/HSA Hill Start Feature DTCs

2622 2 12 24 HSA lamp Open Circuit or Shorted to GND ON ‑

2622 3 12 26 HSA valve: Solenoid Shorted to Voltage ON ‑

2622 3 12 31 HSA lamp Shorted to Voltage ON ON

2622 4 12 25 HSA valve: Solenoid Shorted to Ground ‑ ‑

2622 5 12 33 HSA valve: Solenoid Open Circuit ‑ ‑

Bendix® eTrac™ DTCs

2984 3 12 34 Bendix® eTrac™ Solenoid Shorted to Voltage ‑ ON

2984 4 12 35 Bendix eTrac Solenoid Shorted to Ground ‑ ON

Figures Used

Figure 1 - Bendix® ESP® EC‑80™ Controller ....................................................................1

Figure 2 - Bendix® WS‑24™ Wheel Speed Sensors .........................................................3

Figure 3 - Example Of A Bendix® M‑40X™ Modulator .....................................................3

Figure 4 - Examples Of Steering Angle Sensors ............................................................3

Figure 5 - Yaw And Brake Demand/Load Sensors ..........................................................4

Figure 6 - Additional Valves Necessary For The Hill Start Feature .................................4

Figure 7 - Bendix ESP EC‑80 Controller Features ..........................................................5

Figure 8 - Power Line Without PLC Signal ......................................................................5

Figure 9 - Power Line With PLC Signal ...........................................................................5

Figure 10 - Bendix ESP EC‑80 Controller Indicator Lamp Behavior ...............................8

Figure 11 - Vehicle Orientation (Typical) .........................................................................9

Figure 12 - RSP Example .............................................................................................. 12

Figure 13 - Yaw Control Example ..................................................................................12

Figure 14 - Typical Vehicle Diagnostic Connector Locations (J1939) ...........................21

Figure 15 - Example Of Blink Code Message ...............................................................21

Figure 16 - Diagnostic Modes........................................................................................22

Figure 17 - System Conguration Check .......................................................................23

Figure 18 - Bendix® ACom® Diagnostics .......................................................................24

Figure 19 - The Bendix® Remote Diagnostic Unit..........................................................24

Figure 20 - Diagnostic Trouble Codes ...........................................................................25

Figure 21 - Bendix EC‑80 Controller Component Connectors ......................................50

Figure 22 - WS‑24 Wheel Speed Sensor Installation (S‑Cam And Air Disc Brake) ...... 51

Figures 23 & 24 - Troubleshooting: Wiring Schematics ...........................................52‑53

63

TEST

Full Table of Contents

Introduction ............................................................................................................................................. 1

Yaw Control (YC) .................................................................................................................................... 3

Roll Stability Program (RSP) .................................................................................................................. 3

Components ........................................................................................................................................3‑4

Bendix® eTrac™ Automated Air Suspension Transfer System ................................................................ 4

ECU Mounting ........................................................................................................................................ 4

Hardware Congurations ....................................................................................................................... 4

Bendix® ESP® EC‑80™ Controllers USE Power Line Carrier (PLC) ....................................................... 5

Bendix ESP EC‑80 Controller Inputs ..................................................................................................... 5

Bendix ESP EC‑80 Controller Outputs ...............................................................................................6‑7

Indicator Lamps And Power‑Up Sequence .........................................................................................8‑9

ABS Operation .................................................................................................................................. 9‑10

ATC Operation .................................................................................................................................. 11‑12

Bendix® ESP® ABS With Stability Control .......................................................................................12‑13

Important Safety Information About The Bendix ESP System ........................................................ 13‑14

Dynamometer Test Mode ..................................................................................................................... 14

Automatic Tire Size Calibration ............................................................................................................ 14

System Impact During Active Trouble Codes ....................................................................................... 15

ABS Partial Shutdown .......................................................................................................................... 15

System Reconguration ....................................................................................................................... 16

Electronic Control Unit (ECU) Reconguration .................................................................................... 16

Data Storage ........................................................................................................................................ 16

Troubleshooting ........................................................................................................................... 17-53

Removal Of The Bendix ESP EC‑80 Controller Assembly .................................................................. 17

Obtaining A New Bendix ESP EC‑80 Controller ................................................................................. 17

Installing A New Bendix ESP EC‑80 Controller ................................................................................... 17

Steering Angle Sensor Maintenance .................................................................................................... 18

Steering Angle Sensor Calibration ....................................................................................................... 18

Removal Of The Yaw Rate/Lateral Acceleration Sensor ..................................................................... 19

Brake Demand Sensor Calibration ....................................................................................................... 20

Pressure Sensor Installation Requirements ......................................................................................... 20

Troubleshooting: Blink Codes and Diagnostic Modes ..................................................................... 21‑23

ECU Diagnostics .................................................................................................................................. 21

Blink Codes .......................................................................................................................................... 21

Diagnostic Modes ................................................................................................................................. 22

Troubleshooting: Using PC‑Based or Hand‑Held Diagnostic Tools ................................................24‑25

Bendix® ACom® Diagnostic Software ................................................................................................... 24

Bendix® RDU™ (Remote Diagnostic Unit) ............................................................................................. 24

Active or Inactive Diagnostic Trouble Codes: Index and Troubleshooting Tests ............................. 26‑47

Troubleshooting: Connectors ............................................................................................................... 48

Troubleshooting: Wiring ...................................................................................................................49‑53

Glossary ............................................................................................................................................... 54

APPENDIX A: Troubleshooting a 12‑7 Blink Code DTC (SID‑93 FMI‑4) (SPN‑0802 FMI‑04) ........... 55

APPENDIX B: J1939 SPN and FMI Codes and their Bendix Blink Code Equivalents ...................56‑62

64

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