R51(DLN) DLN

User Manual: DLN

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DLN-1
TRANSMISSION & DRIVELINE
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SECTION DLN A
B
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CONTENTS
DRIVELINE
TRANSFER: ATX14B
BASIC INSPECTION .................................... 8
DIAGNOSIS AND REPAIR WORKFLOW .......... 8
Work Flow .................................................................8
Preliminary Check .....................................................9
FUNCTION DIAGNOSIS ..............................12
4WD SYSTEM ....................................................12
System Diagram ......................................................12
System Description .................................................13
Component Parts Location ......................................18
CAN Communication ...............................................19
Cross-Sectional View ..............................................19
Power Transfer ........................................................19
DIAGNOSIS SYSTEM (TRANSFER CON-
TROL UNIT) ........................................................22
CONSULT-III Function (ALL MODE AWD/4WD) ....22
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ............................26
NVH Troubleshooting Chart ....................................26
COMPONENT DIAGNOSIS .........................27
P1811 POWER SUPPLY CIRCUIT FOR
TRANSFER CONTROL UNIT ............................27
Description ..............................................................27
DTC Logic ...............................................................27
Diagnosis Procedure ...............................................27
Component Inspection ............................................28
P1802 – P1804, P1809 TRANSFER CON-
TROL UNIT .........................................................29
Description ..............................................................29
DTC Logic ...............................................................29
Diagnosis Procedure ...............................................29
P1807 VEHICLE SPEED SENSOR (A/T) ..........31
Description ...............................................................31
DTC Logic ................................................................31
Diagnosis Procedure ...............................................31
P1808 VEHICLE SPEED SENSOR (ABS) .......32
Description ...............................................................32
DTC Logic ................................................................32
Diagnosis Procedure ...............................................32
P1810 NEUTRAL-4LO SWITCH .......................33
Description ...............................................................33
DTC Logic ................................................................33
Diagnosis Procedure ...............................................33
Component Inspection .............................................35
P1813 4WD SHIFT SWITCH .............................36
Description ...............................................................36
DTC Logic ................................................................36
Diagnosis Procedure ...............................................36
Component Inspection .............................................38
P1814 WAIT DETECTION SWITCH .................40
Description ...............................................................40
DTC Logic ................................................................40
Diagnosis Procedure ...............................................40
Component Inspection .............................................42
P1816 PNP SWITCH .........................................43
Description ...............................................................43
DTC Logic ................................................................43
Diagnosis Procedure ...............................................43
P1817 ACTUATOR MOTOR .............................44
Description ...............................................................44
DTC Logic ................................................................44
Diagnosis Procedure ...............................................44
Component Inspection .............................................48
P1818 ACTUATOR POSITION SWITCH ..........50
Description ...............................................................50
DTC Logic ............................................................
....50
Diagnosis Procedure ...............................................50
Revision: October 2008
2009 Pathfinder
DLN-2
Component Inspection ............................................ 52
P1819 TRANSFER CONTROL DEVICE ........... 53
Description .............................................................. 53
DTC Logic ............................................................... 53
Diagnosis Procedure .............................................. 53
P1820 ENGINE SPEED SIGNAL ...................... 57
Description .............................................................. 57
DTC Logic ............................................................... 57
Diagnosis Procedure .............................................. 57
P1822 CLUTCH PRESSURE SOLENOID ......... 58
Description .............................................................. 58
DTC Logic ............................................................... 58
Diagnosis Procedure .............................................. 58
Component Inspection ............................................ 60
P1823 2-4 SOLENOID ....................................... 62
Description .............................................................. 62
DTC Logic ............................................................... 62
Diagnosis Procedure .............................................. 62
Component Inspection ............................................ 65
P1824 TRANSFER MOTOR .............................. 66
Description .............................................................. 66
DTC Logic ............................................................... 66
Diagnosis Procedure .............................................. 66
Component Inspection ............................................ 70
P1826 TRANSFER FLUID TEMPERATURE .... 72
Description .............................................................. 72
DTC Logic ............................................................... 72
Diagnosis Procedure .............................................. 72
Component Inspection ............................................ 73
P1827 CLUTCH PRESSURE SWITCH ............. 75
Description .............................................................. 75
DTC Logic ............................................................... 75
Diagnosis Procedure .............................................. 75
Component Inspection ............................................ 76
P1828 LINE PRESSURE SWITCH .................... 78
Description .............................................................. 78
DTC Logic ............................................................... 78
Diagnosis Procedure .............................................. 78
Component Inspection ............................................ 80
P1829 THROTTLE POSITION SIGNAL (ECM)
... 81
Description .............................................................. 81
DTC Logic ............................................................... 81
Diagnosis Procedure .............................................. 81
P1830 ABS OPERATION SIGNAL (ABS) ........ 82
Description .............................................................. 82
DTC Logic ............................................................... 82
Diagnosis Procedure .............................................. 82
P1831 VDC OPERATION SIGNAL (ABS) ........ 83
Description .............................................................. 83
DTC Logic ............................................................... 83
Diagnosis Procedure ............................................... 83
P1832 TCS OPERATION SIGNAL (ABS) ......... 84
Description .............................................................. 84
DTC Logic ............................................................... 84
Diagnosis Procedure ............................................... 84
ECU DIAGNOSIS ....................................... 85
TRANSFER CONTROL UNIT ........................... 85
Reference Value ..................................................... 85
Wiring Diagram ....................................................... 93
DTC Index .............................................................102
SYMPTOM DIAGNOSIS ...........................107
4WD SYSTEM SYMPTOMS .............................107
Symptom Table .....................................................107
4WD SHIFT INDICATOR LAMP AND 4LO IN-
DICATOR LAMP DO NOT TURN ON ..............108
Description ............................................................108
Diagnosis Procedure .............................................108
4WD WARNING LAMP DOES NOT TURN ON ..111
Description ............................................................111
Diagnosis Procedure .............................................111
4WD SHIFT INDICATOR LAMP OR 4LO INDI-
CATOR LAMP DO NOT CHANGE ...................114
Description ............................................................114
Diagnosis Procedure .............................................114
ATP WARNING LAMP DOES NOT TURN ON ..116
Description ............................................................116
Diagnosis Procedure .............................................116
4WD SHIFT INDICATOR LAMP KEEPS
FLASHING ........................................................118
Description ............................................................118
Diagnosis Procedure .............................................118
4WD WARNING LAMP FLASHES RAPIDLY ..119
Description ............................................................119
Diagnosis Procedure .............................................119
4WD WARNING LAMP FLASHES SLOWLY ..120
Description ............................................................120
Diagnosis Procedure .............................................120
HEAVY TIGHT-CORNER BRAKING SYMP-
TOM OCCURS ..................................................121
Description ............................................................121
Diagnosis Procedure .............................................121
ATP SWITCH ....................................................123
Description ............................................................123
Diagnosis Procedure .............................................123
4WD SYSTEM DOES NOT OPERATE ............125
Description ............................................................125
Revision: October 2008
2009 Pathfinder
DLN-3
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Diagnosis Procedure ............................................. 125
PRECAUTION ............................................126
PRECAUTIONS ................................................126
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................... 126
Precaution for Transfer Assembly and Transfer
Control Unit Replacement ..................................... 126
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ................................. 126
Precaution ............................................................. 127
Service Notice ....................................................... 127
PREPARATION .........................................129
PREPARATION ................................................129
Special Service Tool ............................................. 129
Commercial Service Tool ...................................... 132
ON-VEHICLE MAINTENANCE ..................133
TRANSFER FLUID ...........................................133
Replacement ......................................................... 133
Inspection .............................................................. 133
TRANSFER OIL FILTER ..................................134
Removal and Installation ....................................... 134
ON-VEHICLE REPAIR ............................... 136
TRANSFER CONTROL UNIT ..........................136
Removal and Installation ....................................... 136
FRONT OIL SEAL ............................................137
Removal and Installation ....................................... 137
REAR OIL SEAL ..............................................139
Removal and Installation ....................................... 139
SIDE OIL SEAL ................................................141
Removal and Installation ....................................... 141
TRANSFER CONTROL DEVICE .....................142
Removal and Installation ....................................... 142
AIR BREATHER HOSE ....................................143
Removal and Installation ....................................... 143
TRANSFER MOTOR ........................................148
Removal and Installation ....................................... 148
REMOVAL AND INSTALLATION .............149
TRANSFER ASSEMBLY .................................149
Removal and Installation ....................................... 149
DISASSEMBLY AND ASSEMBLY ............150
TRANSFER ASSEMBLY .................................150
Disassembly and Assembly .................................. 150
SERVICE DATA AND SPECIFICATIONS
(SDS) ..........................................................187
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... 187
General Specification ............................................187
Inspection and Adjustment ....................................187
TRANSFER: TX15B
BASIC INSPECTION .................................189
DIAGNOSIS AND REPAIR WORKFLOW ...... 189
Work Flow ..............................................................189
FUNCTION DIAGNOSIS ............................191
4WD SYSTEM ................................................. 191
System Diagram ....................................................191
System Description ................................................192
Component Parts Location ....................................194
CAN Communication .............................................195
Cross-Sectional View ............................................195
Power Transfer ......................................................196
DIAGNOSIS SYSTEM (TRANSFER CON-
TROL UNIT) ....................................................198
CONSULT-III Function (ALL MODE AWD/4WD) ..198
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... 201
NVH Troubleshooting Chart ..................................201
COMPONENT DIAGNOSIS .......................202
P1801, P1811 POWER SUPPLY CIRCUIT
FOR TRANSFER CONTROL UNIT ................ 202
Description .............................................................202
DTC Logic ..............................................................202
Diagnosis Procedure .............................................202
Component Inspection ...........................................204
P1802 – P1804, P1809 TRANSFER CON-
TROL UNIT ...................................................... 205
Description .............................................................205
DTC Logic ..............................................................205
Diagnosis Procedure .............................................205
P1807 VEHICLE SPEED SENSOR (A/T) ....... 207
Description .............................................................207
DTC Logic ..............................................................207
Diagnosis Procedure .............................................207
P1808 VEHICLE SPEED SENSOR (ABS) ..... 208
Description .............................................................208
DTC Logic ..............................................................208
Diagnosis Procedure .............................................208
P1810 4 LO SWITCH ......................................209
Description .............................................................209
DTC Logic ..............................................................209
Diagnosis Procedure .............................................209
Revision: October 2008
2009 Pathfinder
DLN-4
Component Inspection ...........................................211
P1813 4WD SHIFT SWITCH ...........................212
Description .............................................................212
DTC Logic ..............................................................212
Diagnosis Procedure .............................................212
Component Inspection ...........................................214
P1814 WAIT DETECTION SWITCH ................215
Description .............................................................215
DTC Logic ..............................................................215
Diagnosis Procedure .............................................215
Component Inspection ...........................................217
P1816 PNP SWITCH .......................................218
Description .............................................................218
DTC Logic ..............................................................218
Diagnosis Procedure .............................................218
P1817 ACTUATOR MOTOR ...........................219
Description .............................................................219
DTC Logic ..............................................................219
Diagnosis Procedure .............................................219
Component Inspection ...........................................224
P1818 ACTUATOR POSITION SWITCH ........226
Description .............................................................226
DTC Logic ..............................................................226
Diagnosis Procedure .............................................226
P1819 TRANSFER CONTROL DEVICE .........229
Description .............................................................229
DTC Logic ..............................................................229
Diagnosis Procedure .............................................229
P1820 ENGINE SPEED SIGNAL ....................232
Description .............................................................232
DTC Logic ..............................................................232
Diagnosis Procedure .............................................232
ECU DIAGNOSIS .......................................233
TRANSFER CONTROL UNIT ..........................233
Reference Value ....................................................233
Wiring Diagram ......................................................238
DTC Index .............................................................245
SYMPTOM DIAGNOSIS ............................248
4WD SYSTEM SYMPTOMS ............................248
Symptom Table .....................................................248
4WD WARNING LAMP DOES NOT TURN ON .249
Description .............................................................249
Diagnosis Procedure .............................................249
4WD SHIFT INDICATOR LAMP AND 4LO IN-
DICATOR LAMP DO NOT TURN ON .............251
Description .............................................................251
Diagnosis Procedure .............................................251
4WD SHIFT INDICATOR LAMP OR 4LO INDI-
CATOR LAMP DO NOT CHANGE ...................253
Description ............................................................253
Diagnosis Procedure .............................................253
ATP WARNING LAMP DOES NOT TURN ON ..255
Description ............................................................255
Diagnosis Procedure .............................................255
4WD SHIFT INDICATOR LAMP KEEPS
FLASHING ........................................................257
Description ............................................................257
Diagnosis Procedure .............................................257
4WD WARNING LAMP FLASHES SLOWLY ..258
Description ............................................................258
Diagnosis Procedure .............................................258
ATP SWITCH ....................................................259
Description ............................................................259
Diagnosis Procedure .............................................259
Component Inspection ..........................................260
PRECAUTION ...........................................262
PRECAUTIONS ................................................262
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...............................................................262
Precaution for Transfer Assembly and Transfer
Control Unit Replacement .....................................262
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ................................263
Precaution .............................................................264
Service Notice .......................................................265
PREPARATION .........................................266
PREPARATION ................................................266
Special Service Tool .............................................266
Commercial Service Tool ......................................268
ON-VEHICLE MAINTENANCE .................270
TRANSFER FLUID ...........................................270
Replacement .........................................................270
Inspection ..............................................................270
ON-VEHICLE REPAIR ..............................271
TRANSFER CONTROL UNIT ..........................271
Removal and Installation .......................................271
FRONT OIL SEAL ............................................272
Removal and Installation .......................................272
REAR OIL SEAL ..............................................274
Removal and Installation .......................................274
TRANSFER CONTROL DEVICE .....................276
Removal and Installation .......................................276
Revision: October 2008
2009 Pathfinder
DLN-5
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AIR BREATHER HOSE ....................................278
Removal and Installation ....................................... 278
REMOVAL AND INSTALLATION .............280
TRANSFER ASSEMBLY .................................280
Removal and Installation ....................................... 280
DISASSEMBLY AND ASSEMBLY ............281
TRANSFER ASSEMBLY .................................281
Disassembly and Assembly .................................. 281
PLANETARY CARRIER ...................................297
Disassembly and Assembly .................................. 297
FRONT DRIVE SHAFT .....................................301
Disassembly and Assembly .................................. 301
SHIFT CONTROL .............................................303
Disassembly and Assembly .................................. 303
SERVICE DATA AND SPECIFICATIONS
(SDS) ..........................................................305
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................305
General Specification ............................................ 305
Inspection and Adjustment .................................... 305
PROPELLER SHAFT: 2F1310
PREPARATION .........................................306
PREPARATION ................................................306
Commercial Service Tool ...................................... 306
FUNCTION DIAGNOSIS ............................ 307
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ..........................307
NVH Troubleshooting Chart .................................. 307
ON-VEHICLE REPAIR ............................... 308
PROPELLER SHAFT .......................................308
On-Vehicle Service ............................................... 308
REMOVAL AND INSTALLATION .............309
PROPELLER SHAFT .......................................309
Removal and Installation ....................................... 309
DISASSEMBLY AND ASSEMBLY ............311
PROPELLER SHAFT .......................................311
Disassembly and Assembly .................................. 311
SERVICE DATA AND SPECIFICATIONS
(SDS) ..........................................................313
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................313
General Specification ............................................313
Snap Ring ..............................................................313
PROPELLER SHAFT: 2S1330
PREPARATION .........................................314
PREPARATION ...............................................314
Commercial Service Tool ......................................314
FUNCTION DIAGNOSIS ............................315
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... 315
NVH Troubleshooting Chart ..................................315
ON-VEHICLE REPAIR ...............................316
PROPELLER SHAFT ...................................... 316
On-Vehicle Service ................................................316
REMOVAL AND INSTALLATION .............317
PROPELLER SHAFT ...................................... 317
Removal and Installation .......................................317
DISASSEMBLY AND ASSEMBLY ............319
PROPELLER SHAFT ...................................... 319
Disassembly and Assembly ...................................319
SERVICE DATA AND SPECIFICATIONS
(SDS) ..........................................................321
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... 321
General Specification ............................................321
Snap Ring ..............................................................322
PROPELLER SHAFT: 2S1350
PREPARATION .........................................323
PREPARATION ...............................................323
Commercial Service Tool ......................................323
FUNCTION DIAGNOSIS ............................324
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... 324
NVH Troubleshooting Chart ..................................324
ON-VEHICLE REPAIR ...............................325
PROPELLER SHAFT ...................................... 325
On-Vehicle Service ................................................325
REMOVAL AND INSTALLATION .............326
PROPELLER SHAFT ...................................... 326
Removal and Installation .......................................326
DISASSEMBLY AND ASSEMBLY ............328
PROPELLER SHAFT ...................................... 328
Revision: October 2008
2009 Pathfinder
DLN-6
Disassembly and Assembly ...................................328
SERVICE DATA AND SPECIFICATIONS
(SDS) ..........................................................330
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................330
General Specification ............................................330
Snap Ring ..............................................................330
FRONT FINAL DRIVE: R180A
PRECAUTION ............................................331
PRECAUTIONS ...............................................331
Precaution for Servicing Front Final Drive .............331
PREPARATION ..........................................332
PREPARATION ...............................................332
Special Service Tool ..............................................332
Commercial Service Tool ......................................334
FUNCTION DIAGNOSIS ............................336
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ..........................336
NVH Troubleshooting Chart ..................................336
DESCRIPTION .................................................337
Cross-Sectional View ............................................337
ON-VEHICLE MAINTENANCE ..................338
DIFFERENTIAL GEAR OIL .............................338
Changing Differential Gear Oil ...............................338
Checking Differential Gear Oil ...............................338
ON-VEHICLE REPAIR ...............................339
FRONT OIL SEAL ...........................................339
Removal and Installation .......................................339
SIDE OIL SEAL ...............................................341
Removal and Installation .......................................341
CARRIER COVER ...........................................342
Removal and Installation .......................................342
REMOVAL AND INSTALLATION ..............343
FRONT FINAL DRIVE ASSEMBLY ................343
Removal and Installation .......................................343
DISASSEMBLY AND ASSEMBLY ............345
FRONT FINAL DRIVE .....................................345
Disassembly and Assembly ...................................345
SERVICE DATA AND SPECIFICATIONS
(SDS) ..........................................................364
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................364
General Specification ............................................364
Inspection and Adjustment ....................................364
FRONT FINAL DRIVE: M205
PRECAUTION ...........................................366
PRECAUTIONS ................................................366
Precaution for Servicing Front Final Drive ............366
PREPARATION .........................................367
PREPARATION ................................................367
Special Service Tool .............................................367
Commercial Service Tool ......................................369
FUNCTION DIAGNOSIS ...........................370
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ...........................370
NVH Troubleshooting Chart ..................................370
ON-VEHICLE MAINTENANCE .................371
DIFFERENTIAL GEAR OIL ..............................371
Changing Differential Gear Oil ..............................371
Checking Differential Gear Oil ..............................371
ON-VEHICLE REPAIR ..............................372
SIDE OIL SEAL ................................................372
Removal and Installation .......................................372
FRONT OIL SEAL ............................................373
Removal and Installation .......................................373
CARRIER COVER ............................................375
Removal and Installation .......................................375
REMOVAL AND INSTALLATION .............376
FRONT FINAL DRIVE ......................................376
Removal and Installation .......................................376
DISASSEMBLY AND ASSEMBLY ...........378
FRONT FINAL DRIVE ......................................378
Disassembly and Assembly ..................................378
SERVICE DATA AND SPECIFICATIONS
(SDS) .........................................................395
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................395
General Specification ............................................395
Inspection and Adjustment ....................................395
REAR FINAL DRIVE: R200
PRECAUTION ...........................................397
PRECAUTIONS ................................................397
Revision: October 2008
2009 Pathfinder
DLN-7
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Precaution for Servicing Rear Final Drive ............. 397
PREPARATION .........................................398
PREPARATION ................................................398
Special Service Tool ............................................. 398
Commercial Service Tool ...................................... 401
FUNCTION DIAGNOSIS ............................ 402
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ..........................402
NVH Troubleshooting Chart .................................. 402
DESCRIPTION .................................................403
Cross-Sectional View ............................................ 403
ON-VEHICLE MAINTENANCE ..................404
DIFFERENTIAL GEAR OIL ..............................404
Changing Differential Gear Oil .............................. 404
Checking Differential Gear Oil ............................... 404
ON-VEHICLE REPAIR ............................... 405
FRONT OIL SEAL ............................................405
Removal and Installation ....................................... 405
SIDE OIL SEAL ................................................407
Removal and Installation ....................................... 407
CARRIER COVER ............................................409
Removal and Installation ....................................... 409
REMOVAL AND INSTALLATION .............410
REAR FINAL DRIVE ........................................410
Removal and Installation ....................................... 410
DISASSEMBLY AND ASSEMBLY ............413
REAR FINAL DRIVE ........................................413
Disassembly and Assembly .................................. 413
SERVICE DATA AND SPECIFICATIONS
(SDS) ..........................................................432
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................432
General Specification ............................................ 432
Inspection and Adjustment .................................... 432
REAR FINAL DRIVE: R230 (4WD)
PRECAUTION ............................................434
PRECAUTIONS ...............................................434
Precaution for Servicing Rear Final Drive .............434
PREPARATION .........................................435
PREPARATION ...............................................435
Special Service Tool ..............................................435
Commercial Service Tool ......................................438
FUNCTION DIAGNOSIS ............................439
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... 439
NVH Troubleshooting Chart ..................................439
DESCRIPTION ................................................ 440
Cross-Sectional View ............................................440
ON-VEHICLE MAINTENANCE ..................441
DIFFERENTIAL GEAR OIL ............................ 441
Changing Differential Gear Oil ...............................441
Checking Differential Gear Oil ...............................441
ON-VEHICLE REPAIR ...............................442
FRONT OIL SEAL ........................................... 442
Removal and Installation .......................................442
SIDE OIL SEAL ............................................... 444
Removal and Installation .......................................444
CARRIER COVER ........................................... 446
Removal and Installation .......................................446
REMOVAL AND INSTALLATION .............447
REAR FINAL DRIVE .......................................447
Removal and Installation .......................................447
DISASSEMBLY AND ASSEMBLY ............450
REAR FINAL DRIVE .......................................450
Disassembly and Assembly ...................................450
SERVICE DATA AND SPECIFICATIONS
(SDS) ..........................................................467
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... 467
General Specification ............................................467
Inspection and Adjustment ....................................467
Revision: October 2008
2009 Pathfinder
DLN-8
< BASIC INSPECTION > [TRANSFER: ATX14B]
DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow INFOID:0000000003937184
WORK FLOW
DETAILED FLOW
1.CUSTOMER INFORMATION
Interview the customer to obtain detailed information about the symptom.
>> GO TO 2
2.PRELIMINARY CHECK
Perform preliminary check. Refer to DLN-9, "Preliminary Check".
>> GO TO 3
3.SELF-DIAGNOSIS
Perform self-diagnosis. Refer to DLN-22, "CONSULT-III Function (ALL MODE AWD/4WD)".
AWNIA1592G
B
Revision: October 2008
2009 Pathfinder
DIAGNOSIS AND REPAIR WORKFLOW
DLN-9
< BASIC INSPECTION > [TRANSFER: ATX14B]
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>> GO TO 4
4.SYMPTOM
Check for symptoms. Refer to DLN-107, "Symptom Table".
>> GO TO 5
5.MALFUNCTIONING PARTS
Repair or replace the applicable parts.
>> GO TO 6
6.SYSTEM OPERATION
Check system operation.
>> GO TO 7
7.SELF-DIAGNOSIS
Perform self-diagnosis.
Are any DTC's displayed?
YES >> GO TO 5
NO >> Inspection End
Preliminary Check INFOID:0000000003937185
TRANSFER FLUID CHECK
Check for leaks and fluid level. Refer to DLN-133, "Inspection".
PREPARATION FOR ROAD TEST
The purpose of the test is to determine overall performance of trans-
fer case and analyze causes of malfunctions.
When a malfunction is found in any part of transfer, perform the road
test to locate the malfunction area and repair the malfunction parts.
The road test consists of the following three parts.
1. CHECK BEFORE ENGINE IS STARTED
2. CHECK AT IDLE
3. CRUISE TEST
CHECK BEFORE ENGINE IS STARTED
1.CHECK 4WD SHIFT INDICATOR LAMP
1. Park vehicle on flat surface.
2. Turn ignition switch to OFF position.
3. Move A/T selector lever to P position.
4. Set 4WD shift switch to 2WD position.
5. Turn ignition switch to ON position. (Do not start engine.)
Does 4WD shift indicator lamp turn ON for approximately 1 second?
YES >> GO TO 2.
NO >> GO TO DLN-108, "Diagnosis Procedure".
2.CHECK 4WD WARNING LAMP
1. Turn ignition switch to OFF position.
2. Move A/T selector lever to P position.
3. Set 4WD shift switch to 2WD position.
4. Turn ignition switch to ON position. (Do not start engine.)
SMT089D
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2009 Pathfinder
DLN-10
< BASIC INSPECTION > [TRANSFER: ATX14B]
DIAGNOSIS AND REPAIR WORKFLOW
Does 4WD warning lamp turn ON?
YES >> GO TO CHECK AT IDLE.
NO >> GO TO DLN-111, "Diagnosis Procedure".
CHECK AT IDLE
1.CHECK 4WD SHIFT INDICATOR LAMP
1. Park vehicle on flat surface and engage the parking brake.
2. Turn ignition switch to OFF position.
3. Move A/T selector lever to P position.
4. Set 4WD shift switch to 2WD position.
5. Start engine.
Does 4WD shift indicator lamp turn ON?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK 4WD WARNING LAMP
Check 4WD warning lamp state.
Is 4WD warning lamp turned ON?
YES >> Perform the self-diagnosis. Refer to DLN-22, "CONSULT-III Function (ALL MODE AWD/4WD)".
NO >> Refer to DLN-114, "Diagnosis Procedure".
3.CHECK 4WD SHIFT INDICATOR AND 4LO INDICATOR OPERATION
1. Brake pedal depressed.
2. Move A/T selector lever to N position.
3. Set 4WD shift switch to 2WD, AUTO, 4H, 4LO, 4H, AUTO and
2WD in order. (Stay at each switch position for at least 1 sec-
ond.)
Do 4WD shift indicator and 4LO indicator lamps change properly?
Does buzzer sound?
YES >> GO TO CRUISE TEST.
NO >> GO TO DLN-114, "Diagnosis Procedure".
CRUISE TEST
1.CHECK INPUT SIGNAL
1. Warm up engine to normal operating temperature.
2. Park vehicle on flat surface.
3. Move A/T selector lever to P position.
4. Set 4WD shift switch to AUTO position.
5. Start engine.
6. Drive vehicle for at least 30 seconds at a speed higher than 20 km/h (12 MPH).
Is 4WD warning lamp turned ON?
On steady>>Perform the self-diagnosis. Refer to DLN-22, "CONSULT-III Function (ALL MODE AWD/4WD)".
WDIA0136E
Revision: October 2008
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DIAGNOSIS AND REPAIR WORKFLOW
DLN-11
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Flash rapidly>>Refer to DLN-119, "Diagnosis Procedure".
Flash slowly>>Refer to DLN-120, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK TIGHT CORNER BRAKING SYMPTOM (1)
1. Set 4WD shift switch to AUTO position.
2. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned.
Does tight corner braking symptom occur?
YES >> GO TO DLN-121, "Diagnosis Procedure".
NO >> GO TO 3.
3.CHECK TIGHT CORNER BRAKING SYMPTOM (2)
1. Set 4WD shift switch to 4HI position.
2. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned.
Does tight corner braking symptom occur?
YES >> Inspection End.
NO >> GO TO DLN-125, "Diagnosis Procedure".
Revision: October 2008
2009 Pathfinder
DLN-12
< FUNCTION DIAGNOSIS > [TRANSFER: ATX14B]
4WD SYSTEM
FUNCTION DIAGNOSIS
4WD SYSTEM
System Diagram INFOID:0000000003937186
COMPONENT DESCRIPTION
WDIA0164E
Components Function
Transfer control unit Controls transfer control device, control valves and shifts between 2WD/4WD and 4H/4LO.
Transfer control device Integrates actuator motor and actuator position switch.
2-4WD shift solenoid valve Controls oil pressure and allows shifting between 2WD and 4WD.
Clutch pressure solenoid valve Controls oil pressure and distributes torque between front and rear tires.
Line pressure switch Detects line pressure.
Clutch pressure switch Detects clutch pressure.
Transfer fluid temperature sensor Detects transfer fluid temperature.
Actuator motor Moves shift rods when signaled by transfer control unit.
Actuator position switch Detects actuator motor position.
Wait detection switch Detects whether or not 4WD lock gear is locked.
4LO switch Detects if transfer case is in 4LO.
ATP switch Detects if transfer case is in neutral.
4WD shift switch Allows driver to select from 2WD/4WD, 4H/4LO and AUTO.
4WD warning lamp Illuminates if malfunction is detected in 4WD system.
Flashes (1 flash / 2 seconds) if large difference in diameter of front and rear tires.
Flashes (2 flashes / 1 second) if high transfer fluid temperature is detected.
ATP warning lamp Indicates that A/T parking mechanism does not operate when A/T selector lever is in P position
because transfer case is in neutral.
4WD shift indicator lamp Displays driving range selected by 4WD shift switch.
4LO indicator lamp Displays 4LO range.
Revision: October 2008
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4WD SYSTEM
DLN-13
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System Description INFOID:0000000003937187
CONTROL SYSTEM
ABS actuator and electric unit
(control unit) Transmits vehicle speed signal via CAN communication to transfer control unit.
TCM
Transmits the following signal via CAN communication to transfer control unit.
Output shaft revolution signal
A/T position indicator signal (PNP switch signal)
ECM Transmits the following signals via CAN communication to transfer control unit.
Engine speed signal
Accelerator pedal position signal
Components Function
Revision: October 2008
2009 Pathfinder
DLN-14
< FUNCTION DIAGNOSIS > [TRANSFER: ATX14B]
4WD SYSTEM
ALL-MODE 4WD Transfer Basic Control
SDIA3396E
Revision: October 2008
2009 Pathfinder
4WD SYSTEM
DLN-15
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Hydraulic Control Circuits
TRANSFER CONTROL UNIT
Transfer control unit controls transfer control device and it directs shifts from 4H-4LO and 2WD-4WD.
Self-diagnosis can be done.
TRANSFER SHIFT HIGH AND LOW RELAYS
Transfer shift high and low relays apply power supply to transfer control device (actuator motor).
TRANSFER SHUT OFF RELAY
Transfer shut off relay applies power supply to transfer motor relay.
4WD SHIFT SWITCH AND INDICATOR LAMPS
4WD Shift Switch
Able to select from 2WD, AUTO, 4H or 4LO.
4WD Shift Indicator Lamp
Displays driving conditions selected by 4WD shift switch with 2WD, AUTO and 4H indicators while engine is
running. (When 4WD warning lamp is turned on, all 4WD shift indicator lamps are turned off.)
Turns ON for approximately 1 second when ignition switch is turned ON, for purpose of lamp check.
4LO Indicator Lamp
LDIA0055E
WDIA0163E
Revision: October 2008
2009 Pathfinder
DLN-16
< FUNCTION DIAGNOSIS > [TRANSFER: ATX14B]
4WD SYSTEM
Displays 4LO condition while engine is running. 4LO indicator lamp flashes if transfer gear does not shift
completely under 2WD, AUTO, 4H4LO. (When 4WD warning lamp is turned on, 4LO indicator lamp is
turned off.)
Turns ON for approximately 1 second when ignition switch is turned ON, for purpose of lamp check.
4WD WARNING LAMP
Turns on or flashes when there is a malfunction in 4WD system.
Also turns on when ignition switch is turned ON, for purpose of lamp check. Turns OFF approximately 1 sec-
ond after the engine starts if system is normal.
4WD Warning Lamp Indication
ATP WARNING LAMP
When the A/T selector lever is in P position, the vehicle may move if the transfer case is in neutral. ATP warn-
ing lamp is turned on to indicate this condition to the driver.
LINE PRESSURE SWITCH
With the transfer system design, control of the oil pressure provides the transmission of drive torque to the
front wheels. The main pressure to control the oil pressure is referred to as the line pressure.
The line pressure switch determines whether or not adequate line pressure has built up under different oper-
ating conditions.
The line pressure switch closes when line pressure is produced.
The line pressure switch senses line pressure abnormalities and turns the 4WD warning lamp ON.
CLUTCH PRESSURE SWITCH
The clutch pressure switch determines whether or not adequate clutch pressure has built up under different
operating conditions.
The clutch pressure switch closes when clutch pressure is produced.
The clutch pressure switch senses clutch pressure abnormalities and turns the 4WD warning lamp ON.
WAIT DETECTION SWITCH
The wait detection switch operates when there is circulating torque produced in the propeller shaft (LH) or
when there is a phase difference between 2-4 sleeve and clutch drum (HL). After the release of the circu-
lating torque, the wait detection switch helps provide the 4WD lock gear (clutch drum) shifts. A difference
may occur between the operation of the 4WD shift switch and actual drive mode. At this point, the wait
detection switch senses an actual drive mode.
The wait detection switch operates as follows.
- 4WD lock gear (clutch drum) locked: ON
- 4WD lock gear (clutch drum) released: OFF
The wait detection switch senses an actual drive mode and the 4WD shift indicator lamp indicates the vehi-
cle drive mode.
ATP SWITCH
ATP switch detects if transfer case is in neutral by the position of the L-H shift fork.
NOTE:
Transfer case may be in neutral when shifting between 4H-4LO.
NEUTRAL-4LO SWITCH
The neutral-4LO switch detects that transfer gear is in neutral or 4LO (or shifting from neutral to 4LO) condi-
tion by L-H shift fork position.
Condition 4WD warning lamp
System normal OFF
Lamp check Turns ON when ignition switch is turned ON.
Turns OFF after engine start.
4WD system malfunction ON
During self-diagnosis Flashes malfunction mode.
Large difference in diameter of front/
rear tires
Flashes slow (1 flash / 2 seconds)
(Continues to flash until the ignition switch is turned OFF)
High fluid temperature in transfer case Flashes rapidly (2 flashes / 1 second)
(Continues to flash until fluid temperature returns to normal)
Revision: October 2008
2009 Pathfinder
4WD SYSTEM
DLN-17
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TRANSFER FLUID TEMPERATURE SENSOR
The transfer fluid temperature sensor detects the transfer fluid temperature and sends a signal to the transfer
control unit.
TRANSFER MOTOR
The transfer motor drives the sub-oil pump to provide proper lubrication and oil pressure control when the
vehicle is at standstill, during low-speed operations or is being driven in reverse.
The main oil pump is operated by the driving force of the mainshaft. In other words, sufficient oil pressure
buildup does not occur when the vehicle is at standstill or during low-speed operations. While the vehicle is
being driven in reverse, the main oil pump rotates in the reverse direction. Therefore the main oil pump does
not discharge oil pressure. During any of the above vehicle operations, the transfer motor drives the sub-oil
pump to compensate for insufficient oil pressure.
The transfer motor operates as follows:
- The motor relay turns OFF in the 2WD mode.
- The motor relay operates as described in the table below in modes other than the 2WD mode.
4WD shift switch, PNP switch, Neutral-4LO switch, vehicle speed sensor and throttle position sensor are
used in conjunction with the transfer motor.
Transfer Motor Relay Operation
*: After 2.5 seconds have elapsed.
CLUTCH PRESSURE SOLENOID VALVE
The clutch pressure solenoid valve distributes front and rear torque in AUTO mode.
2-4WD SHIFT SOLENOID VALVE
The 2-4WD shift solenoid valve operates to apply oil pressure to the wet-multiplate clutch, depending on the
drive mode. The driving force is transmitted to the front wheels through the clutch so the vehicle is set in the
4WD mode. Setting the vehicle in the 2WD mode requires no pressure buildup. In other words, pressure force
applied to the wet-multiplate clutch becomes zero.
TRANSFER CONTROL DEVICE
Integrates actuator motor and actuator position switch.
4WD shift switch A/T selector lever position Vehicle speed
(VSS) Accelerator pedal position Motor relay drive
command
2WD — OFF
4H (LOCK) and 4LO
N position 0 ON
P position 0
0 - 0.07/8 OFF*
0.07/8 - 1/8 HOLD
1/8 - MAX ON
Other than R position
0 < VSS 50 km/h (31 MPH)
ON
50 km/h (31 MPH) < VSS < 55
km/h (34 MPH) HOLD
55 km/h (34 MPH) VSS OFF
R position ON
R position ON
AUTO
P or N position
0
0 - 0.07/8 OFF*
0.07/8 - 1/8 HOLD
1/8 - MAX ON
0 < VSS 50 km/h (31 MPH)
ON
50 km/h (31 MPH) < VSS < 55
km/h (34 MPH) HOLD
55 km/h (34 MPH) VSS OFF
Other than R, P and N posi-
tion
0 < VSS 50 km/h (31 MPH)
ON
50 km/h (31 MPH) < VSS < 55
km/h (34 MPH) HOLD
55 km/h (34 MPH) VSS OFF
Revision: October 2008
2009 Pathfinder
DLN-18
< FUNCTION DIAGNOSIS > [TRANSFER: ATX14B]
4WD SYSTEM
Actuator Motor
Moves shift rods when signaled by transfer control unit.
Actuator Position Switch
Detects actuator motor position and then sends signal to transfer control unit.
Component Parts Location INFOID:0000000003937188
WDIA0124E
Revision: October 2008
2009 Pathfinder
4WD SYSTEM
DLN-19
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CAN Communication INFOID:0000000003937189
Refer to LAN-57, "CAN System Specification Chart".
Cross-Sectional View INFOID:0000000004404656
Power Transfer INFOID:0000000004404657
POWER TRANSFER DIAGRAM
1. Center case 2. Front case 3. Internal gear
4. Planetary carrier assembly 5. Sun gear assembly 6. Main shaft
7. L-H sleeve 8. L-H fork 9. Shift rod
10. 2-4 sleeve 11. 2-4 fork 12. Drive chain
13. Front drive shaft 14. Control valve assembly 15. Transfer motor
16. Rear case 17. Clutch piston 18. Press flange
19. Multiple disc clutch 20. Clutch hub assembly 21. Clutch drum assembly
WDIA0202E
Revision: October 2008
2009 Pathfinder
DLN-20
< FUNCTION DIAGNOSIS > [TRANSFER: ATX14B]
4WD SYSTEM
POWER TRANSFER FLOW
1. Center case 2. Chain 3. Multiple disc clutch
4. Rear case 5. Mainshaft 6. Clutch hub assembly
7. Sub oil pump 8. Transfer motor 9. Control valve
10. Front drive shaft 11. Drain plug 12. 2-4 sleeve
13. Sun gear assembly 14. L-H sleeve 15. Planetary carrier assembly
16. Internal gear 17. Front case
LDIA0053E
Revision: October 2008
2009 Pathfinder
4WD SYSTEM
DLN-21
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SDIA3327E
Revision: October 2008
2009 Pathfinder
DLN-22
< FUNCTION DIAGNOSIS > [TRANSFER: ATX14B]
DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
CONSULT-III Function (ALL MODE AWD/4WD) INFOID:0000000003937190
FUNCTION
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
SELF-DIAG RESULT MODE
Operation Procedure
1. Connect CONSULT-III.
2. With engine at idle, touch SELF-DIAG RESULTS.
Display shows malfunction experienced since the last erasing operation.
NOTE:
The details for TIME are as follows:
0: Error currently detected with transfer control unit.
Except for 0: Error detected in the past and memorized with transfer control unit.
Detects frequency of driving after DTC occurs (frequency of turning ignition switch ON/OFF).
How to Erase Self-diagnostic Results
1. Perform applicable inspection of malfunctioning item and then repair or replace.
2. Start engine and select SELF-DIAG RESULTS mode for ALL MODE AWD/4WD with CONSULT-III.
3. Touch ERASE on CONSULT-III screen to erase DTC memory.
CAUTION:
If memory cannot be erased, perform applicable diagnosis.
SELF-DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-III)
Description
If the engine starts when there is a malfunction in the 4WD system, the 4WD warning lamp turns ON or flickers
in the combination meter. When the system functions properly, the warning lamp turns ON when the ignition
switch is turned to ON, and it turns OFF after engine starts. To locate the cause of a malfunction, start the self-
diagnosis function. The 4WD warning lamp in the combination meter will indicate the malfunction area by
flashing according to the self-diagnostic results. Refer to DLN-102, "DTC Index".
Diagnostic Procedure
1. Warn up engine.
2. Move A/T selector lever to P position.
3. Turn 4WD shift switch to 2WD position.
4. Turn ignition switch ON and OFF at least twice, and then turn ignition switch OFF.
5. Turn 4WD shift switch to AUTO position.
6. Turn ignition switch ON. (Do not start engine.)
7. 4WD warning lamp ON.
8. Move A/T selector lever to R position.
9. Turn 4WD shift switch to 2WD, AUTO and 2WD in order.
10. Move A/T selector lever to D position.
11. Turn 4WD shift switch to 4H, AUTO and 4H in order.
ALL MODE AWD/4WD diagnostic mode Description
SELF-DIAG RESULTS Displays transfer control unit self-diagnosis results.
DATA MONITOR Displays transfer control unit input/output data in real time.
WORK SUPPORT
Supports inspections and adjustments. Commands are transmitted to the transfer control
unit for setting the status suitable for required operation, input/output signals are received
from the transfer control unit and received data is displayed.
CAN DIAG SUPPORT MNTR The results of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER Transfer control unit part number can be read.
Revision: October 2008
2009 Pathfinder
DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
DLN-23
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12. Move A/T selector lever to N position.
13. Turn 4WD shift switch to AUTO position.
14. Move A/T selector lever to P position.
15. Read the flickering of 4WD warning lamp.
Self-diagnosis example
ERASE SELF-DIAGNOSIS
In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is
stored into the control unit as necessary during use by the user. This memory is not erased no matter how
many times the ignition switch is turned ON and OFF.
However, this information is erased by turning ignition switch OFF after performing self-diagnostics or by
erasing the memory using the CONSULT-III.
DATA MONITOR MODE
Operation Procedure
1. Connect CONSULT-III.
2. Touch DATA MONITOR.
3. Select from SELECT MONITOR ITEM, screen of data monitor mode is displayed.
NOTE:
When malfunction is detected, CONSULT-III performs REAL-TIME DIAGNOSIS.
Also, any malfunction detected while in this mode will be displayed at real time.
Display Item List
×: Standard –: Not applicable
PDIA0227E
Monitored item (Unit)
Monitor item selection
Remarks
ECU INPUT
SIGNALS
MAIN
SIGNALS
SELEC-
TION FROM
MENU
VHCL/S SEN·FR [km/h] or [mph] ××
Wheel speed calculated by ABS actuator and
electric unit (control unit).
Signal input with CAN communication line.
VHCL/S SEN·RR [km/h] or [mph] ××Wheel speed calculated by TCM.
Signal input with CAN communication line.
ENGINE SPEED [rpm] ××Engine speed calculated by ECM.
Signal input with CAN communication line.
THRTL POS SEN [V] ××
Accelerator pedal position (APP) sensor sig-
nal voltage is displayed.
Signal input with CAN communication line.
FLUID TEMP SE [V] ××Transfer fluid temperature sensor signal volt-
age is displayed.
BATTERY VOLT [V] ××Power supply voltage for transfer control unit.
2WD SWITCH [ON/OFF] ××4WD shift switch status is displayed.
AUTO SWITCH [ON/OFF] ××4WD shift switch status is displayed.
LOCK SWITCH [ON/OFF] ××4WD shift switch status is displayed.
(LOCK means 4H of 4WD shift switch.)
Revision: October 2008
2009 Pathfinder
DLN-24
< FUNCTION DIAGNOSIS > [TRANSFER: ATX14B]
DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
4L SW [ON/OFF] ××4WD shift switch status is displayed.
(4L means 4LO of 4WD shift switch.)
N POSI SW TF [ON/OFF] ××Neutral-4LO switch signal status is displayed.
ATP SWITCH [ON/OFF] ××ATP switch signal status is displayed.
WAIT DETCT SW [ON/OFF] ××Wait detection switch status is displayed.
LINE PRES SW [ON/OFF] ××Line pressure switch status is displayed.
CL PRES SW [ON / OFF] ××Clutch pressure switch status is displayed.
N POSI SW AT [ON/OFF] ××
N position signal of A/T PNP switch status is
displayed.
Signal input with CAN communication line.
R POSI SW AT [ON/OFF] ××
R position signal of A/T PNP switch status is
displayed.
Signal input with CAN communication line.
P POSI SW AT [ON/OFF] ××
P position signal of A/T PNP switch status is
displayed.
Signal input with CAN communication line.
ABS OPER SW [ON/OFF] ××ABS operation signal status is displayed.
Signal input with CAN communication line.
VDC OPER SW [ON/OFF] ××VDC operation signal status is displayed.
Signal input with CAN communication line.
TCS OPER SW [ON/OFF] ××TCS operation signal status is displayed.
Signal input with CAN communication line.
THROTTLE POSI [0.0/8] ××
Thottle position status is displayed.
Signal input with CAN communication line.
4WD MODE [AUTO/LOCK/2WD/4L] ××
Control status of 4WD recognized by transfer
control unit. (AUTO, 4H, 2WD or 4LO)
VHCL/S COMP [km/h] or [mph] ××
Vehicle speed recognized by transfer control
unit.
COMP CL TORQ [kgm] ××
Calculated torque recognized by transfer con-
trol unit.
DUTY SOLENOID [%] ××Control value of clutch pressure solenoid.
2-4WD SOL [ON/OFF] ××Output condition to 2-4WD solenoid.
2-4WD SOL MON [ON/OFF] ×Check signal for transfer control unit signal
output.
MOTOR RELAY [ON/OFF] ××
Transfer motor relay signal status is dis-
played.
MOTOR RELAY MON [ON/OFF] ×Check signal for transfer control unit signal
output.
4WD FAIL LAMP [ON/OFF] ××
Control status of 4WD warning lamp is dis-
played.
2WD IND [ON/OFF] ×Control status of 4WD shift indicator lamp
(2WD indicator lamp) is displayed.
AUTO IND [ON/OFF] ×Control status of 4WD shift indicator lamp
(2WD and AUTO indicator lamp) is displayed.
LOCK IND [ON/OFF] ×Control status of 4WD shift indicator lamp
(2WD, AUTO and Lock indicator) is displayed.
4L IND [ON/OFF] ×Control status of 4LO indicator lamp is dis-
played.
Monitored item (Unit)
Monitor item selection
Remarks
ECU INPUT
SIGNALS
MAIN
SIGNALS
SELEC-
TION FROM
MENU
Revision: October 2008
2009 Pathfinder
DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
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WORK SUPPORT
When there is no malfunction with transfer and 4WD system, the following symptoms in AUTO mode may be
claimed by a customer: vibration when accelerating on a low µ road (snow-covered or icy road) or a slight
shock is felt at a few hertz as if it were being pushed lightly from behind.
It is possible to deal with these symptoms by changing the CLUTCH FORCE RELEASE LIMIT VALUE. How-
ever, be careful when changing the value because it may adversely affect driving performance.
Operation Procedure
1. Connect CONSULT-III.
2. Touch WORK SUPPORT.
3. Select from CLUTCH/F RLS LIM ADJ, screen of data monitor mode is displayed.
Clutch Force Release Limit Adjustment
1. Initial CLUTCH FORCE RELEASE LIMIT value 0.3 kgm appears under CONDITION SETTING on CON-
SULT-III display.
2. Touch 1.2 on the display.
3. Display changes to NOW ADJUSTING in a short time.
4. When clutch force release limit value is set to 1.2 kgm, current value 0.3 kgm shown on display will be
replaced by 1.2 kgm and ADJUSTMENT COMPLETE will appear at the same time. Clutch force release
limit value setting is now complete.
ATP IND [ON/OFF] ×Control status of ATP warning lamp is dis-
played.
SHIFT POS SW1 [ON/OFF] ××Actuator position switch 1 (Low) signal status
is displayed.
SHIFT POS SW2 [ON/OFF] ××Actuator position switch 2 (high) signal status
is displayed.
SHIFT ACT1 [ON/OFF] ××Output condition to actuator motor (clockwise)
SHIFT AC MON1 [ON/OFF] ××Check signal for transfer control unit signal
output
SHIFT ACT2 [ON/OFF] ××
Output condition to actuator motor (counter-
clockwise)
SHIFT AC MON2 [ON/OFF] ××Check signal for transfer control unit signal
output
T/F F SPEED [km/h] or [mph] ××Displayed, but do not use.
A/T R SPEED [km/h] or [mph] ××
Output shaft revolution signal (Revolution
sensor) calculated by TCM.
Signal input with CAN communication line.
AT GEAR POSI [1/2/3/4/5] ××A/T actual gear position is displayed.
Monitored item (Unit)
Monitor item selection
Remarks
ECU INPUT
SIGNALS
MAIN
SIGNALS
SELEC-
TION FROM
MENU
1.2 kg-m : Tight corner braking symptom is alleviated.
However, vibration may occur when acceler-
ating on a low µ road (icy road, etc.).
0.3 kg-m : Initial set value.
0.2 kg-m : Do not set to this value because the tight
corner braking symptom will get worse.
Revision: October 2008
2009 Pathfinder
DLN-26
< FUNCTION DIAGNOSIS > [TRANSFER: ATX14B]
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting Chart INFOID:0000000003937191
Use the chart below to help you find the cause of the symptom. The numbers indicate the order of the inspec-
tion. If necessary, repair or replace these parts.
Reference page
DLN-133
DLN-150
DLN-150
DLN-150
DLN-150
SUSPECTED PARTS
(Possible cause)
TRANSFER FLUID (Level low)
TRANSFER FLUID (Wrong)
TRANSFER FLUID (Level too high)
LIQUID GASKET (Damaged)
O-RING (Worn or damaged)
OIL SEAL (Worn or damaged)
SHIFT FORK (Worn or damaged)
GEAR (Worn or damaged)
BEARING (Worn or damaged)
Symptom
Noise 1 2 3 3
Transfer fluid leakage 31222
Hard to shift or will not shift 1 1 2
Revision: October 2008
2009 Pathfinder
P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT
DLN-27
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COMPONENT DIAGNOSIS
P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT
Description INFOID:0000000003937192
Power supply to transfer control unit is abnormally low while driving.
DTC Logic INFOID:0000000003937193
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1811 detected?
YES >> Perform diagnosis procedure. Refer to DLN-27, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937194
1.CHECK POWER SUPPLY
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Connect transfer control unit harness connector.
3. Check voltage between transfer control unit harness connector
terminals and ground.
4. Turn ignition switch “ON”. (Do not start engine.)
5. Check voltage between transfer control unit harness connector
terminals and ground.
OK or NG
OK >> GO TO 2.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
40A fusible link (No. j, located in the fuse and fusible link box).
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1811] BATTERY VOLTAGE Power supply voltage for transfer control
unit is abnormally low while driving. Refer to DLN-27.
Connector Terminal Voltage (Approx.)
M152 16 - Ground
0V22 - Ground
M153
29 - Ground
30 - Ground Battery voltage
47 - Ground WDIA0165E
Connector Terminal Voltage (Approx.)
M152 16 - Ground
Battery voltage22 - Ground
M153
29 - Ground
30 - Ground 0V
47 - Ground Battery voltage WDIA0166E
Revision: October 2008
2009 Pathfinder
DLN-28
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT
10A fuses [No. 21 located in fuse block (J/B)] and No. 59 (located in the fuse and relay box).
Harness for short or open between battery and transfer control unit harness connector M153
terminals 47.
Harness for short or open between ignition switch and transfer control unit harness connector
M153 terminal 29.
Harness for short or open between battery and transfer shut off relay harness connector E155
terminal 1 and 3.
Harness for short or open between transfer shut off relay harness connector E155 terminal 2
and transfer control unit harness connector M153 terminal 30.
Harness for short or open between transfer shut off relay harness connector E155 terminal 5
and transfer control unit harness connector M152 terminals 16 and 22.
Battery and ignition switch.
Transfer shut off relay. Refer to DLN-28, "Component Inspection".
2.CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector.
3. Check continuity between transfer control unit harness connec-
tor M152 terminals 3, 6, M153 terminal 45 and ground.
Also check harness for short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to power in harness or con-
nectors.
3.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-85, "Reference Value".
OK or NG
OK >> GO TO 4.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
4.CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> Inspection End.
NG >> Replace transfer control unit. Refer to DLN-136, "Removal and Installation".
Component Inspection INFOID:0000000003937195
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Remove transfer shut off relay. Refer to DLN-18, "Component Parts Location".
3. Apply 12V direct current between transfer shut off relay termi-
nals 1 and 2.
4. Check continuity between relay terminals 3 and 5.
5. If inspection results are abnormal replace the transfer shut off
relay.
Continuity should exist.
SDIA2691E
Condition Continuity
12V direct current supply between terminals 1 and 2 Yes
OFF No
SCIA1245E
Revision: October 2008
2009 Pathfinder
P1802 – P1804, P1809 TRANSFER CONTROL UNIT
DLN-29
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
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P1802 – P1804, P1809 TRANSFER CONTROL UNIT
Description INFOID:0000000003937196
The transfer control unit controls the transfer control device which controls shifts between AUTO, 4H and 4LO
and between 2WD and 4WD. A DTC may set when any of the following occur:
Malfunction is detected in the memory (RAM) system of transfer control unit.
Malfunction is detected in the memory (ROM) system of transfer control unit.
Malfunction is detected in the memory (EEPROM) system of transfer control unit.
AD converter system of transfer control unit is malfunctioning.
DTC Logic INFOID:0000000003937197
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Are DTC's P1802 - P1804 or P1809 detected?
YES >> Perform diagnosis procedure. Refer to DLN-29, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937198
1.INSPECTION START
Do you have CONSULT-III?
YES or NO
YES >> GO TO 2.
NO >> GO TO 3.
2.PERFORM SELF-DIAGNOSIS (WITH CONSULT-III)
With CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select SELF-DIAG RESULTS mode for ALL MODE AWD/4WD with CONSULT-III.
3. Touch ERASE.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Perform the self-diagnosis again.
Is the CONTROL UNIT 1 [P1802], CONTROL UNIT 2 [P1803], CONTROL UNIT 3 [P1804] or CONTROL
UNIT 4 [P1809] displayed?
YES >> Replace transfer control unit. Refer to DLN-136, "Removal and Installation".
NO >> Inspection End.
3.PERFORM SELF-DIAGNOSIS (WITHOUT CONSULT-III)
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1802] CONTROL UNIT 1 Malfunction is detected in the memory
(RAM) system of transfer control unit.
Refer to DLN-29.
[P1803] CONTROL UNIT 2 Malfunction is detected in the memory
(ROM) system of transfer control unit.
[P1804] CONTROL UNIT 3
Malfunction is detected in the memory
(EEPROM) system of transfer control
unit.
[P1809] CONTROL UNIT 4 AD converter system of transfer control
unit is malfunctioning.
Revision: October 2008
2009 Pathfinder
DLN-30
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1802 – P1804, P1809 TRANSFER CONTROL UNIT
Without CONSULT-III
1. Perform the self-diagnosis and then erase self-diagnostic results. Refer to DLN-22, "CONSULT-III Func-
tion (ALL MODE AWD/4WD)".
2. Perform the self-diagnosis again.
Do the self-diagnostic results indicate AD converter?
YES >> Replace transfer control unit.
NO >> Inspection End.
Revision: October 2008
2009 Pathfinder
P1807 VEHICLE SPEED SENSOR (A/T)
DLN-31
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
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P1807 VEHICLE SPEED SENSOR (A/T)
Description INFOID:0000000003937199
The transmission control module (TCM) transmits the output shaft revolution signal via CAN communication to
Transfer control unit. DTC P1807 will set when a malfunction is detected in the output shaft revolution signal
or an improper signal is input while driving.
DTC Logic INFOID:0000000003937200
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1807 detected?
YES >> Perform diagnosis procedure. Refer to DLN-31, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937201
1.CHECK DTC WITH TCM
Perform self-diagnosis with TCM. Refer to TM-36, "CONSULT-III Function (TRANSMISSION)".
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-85, "Reference Value".
Are the inspection results normal?
YES >> GO TO 3.
NO >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
3.CHECK DTC
Drive the vehicle and then perform self-diagnosis.
Are the inspection results normal?
YES >> Inspection End.
NO >> Perform self-diagnosis with TCM again.
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1807] VHCL SPEED SEN·AT
Malfunction is detected in output shaft
revolution signal that is output from
TCM through CAN communication.
Improper signal is input while driving.
Refer to DLN-31.
Revision: October 2008
2009 Pathfinder
DLN-32
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1808 VEHICLE SPEED SENSOR (ABS)
P1808 VEHICLE SPEED SENSOR (ABS)
Description INFOID:0000000003937202
The ABS actuator and electric unit (control unit) transmits a vehicle speed signal via CAN communication to
the transfer control unit. DTC P1808 sets when a malfunction is detected in the vehicle speed signal that is
output from the ABS actuator and electric unit (control unit) or an improper signal is input while driving.
DTC Logic INFOID:0000000003937203
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1808 displayed?
YES >> Perform diagnosis procedure. Refer to DLN-32, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937204
1.CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to BRC-153, "CONSULT-III
Function (ABS)".
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-85, "Reference Value".
Are the inspection results normal?
YES >> GO TO 3.
NO >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
3.CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
Are the inspection results normal?
YES >> Inspection End.
NO >> Perform self-diagnosis with ABS actuator and electric unit (control unit) again.
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1808] VHCL SPEED SEN·ABS
Malfunction is detected in vehicle
speed signal that is output from ABS
actuator and electric unit (control unit)
through CAN communication.
Improper signal is input while driving.
Refer to DLN-32.
Revision: October 2008
2009 Pathfinder
P1810 NEUTRAL-4LO SWITCH
DLN-33
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
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P1810 NEUTRAL-4LO SWITCH
Description INFOID:0000000003937205
The neutral-4LO switch detects that the transfer case is in neutral or 4LO range. DTC P1810 will set when an
improper signal from the neutral-4LO switch is input due to an open or short circuit.
DTC Logic INFOID:0000000003937206
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1810 displayed?
YES >> Perform diagnosis procedure. Refer to DLN-33, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937207
1.CHECK 4LO POSITION SWITCH SIGNAL
With CONSULT-III
1. Start engine.
2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT-III.
3. Read out the value of N POSI SW TF.
Without CONSULT-III
1. Start engine.
2. Check voltage between transfer control unit harness connector
terminal and ground.
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1810] 4L POSI SW TF Improper signal from neutral-4LO switch
is input due to open or short circuit. Refer to DLN-33.
Condition Display value
Vehicle stopped
Engine running
A/T selector lever N position
Brake pedal depressed
4WD shift switch: 2WD,
AUTO or 4H OFF
4WD shift switch: 4H to
4LO (While actuator mo-
tor is operating.) OFF ON
4WD shift switch: 4LO to
4H (While actuator motor
is operating.)
ON OFF
4WD shift switch: 4LO ON
SDIA2693E
Revision: October 2008
2009 Pathfinder
DLN-34
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1810 NEUTRAL-4LO SWITCH
Are inspection results normal?
YES >> GO TO 5.
NO >> GO TO 2.
2.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND NEUTRAL-4LO SWITCH
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the neutral-4LO switch harness connector.
3. Check continuity between transfer control unit harness connec-
tor M153 terminal 25 and neutral-4LO switch harness connector
F60 terminal 13.
Also check harness for short to ground and short to power.
Are inspection results normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect neutral-4LO switch harness connector.
3. Check continuity between neutral-4LO switch harness connec-
tor F60 terminal 12 and ground.
Also check harness for short to ground and short to power.
Are inspection results normal?
YES >> GO TO 4.
NO >> Repair open circuit or short to ground or short to power
in harness or connectors.
4.CHECK 4LO SWITCH
1. Turn ignition switch OFF.
2. Disconnect neutral-4LO switch harness connector.
3. Remove neutral-4LO switch.
Connector Te rm in al
(Wire col-
or)
Condition Voltage
(Approx.)
M153 25 -
Ground
Vehicle stopped
Engine running
A/T selector lever
N position
Brake pedal de-
pressed
4WD shift switch:
2WD, AUTO or 4H
Battery
voltage
4WD shift switch: 4H to
4LO (While actuator
motor is operating.)
Battery
voltage
0V
4WD shift switch: 4LO
to 4H (While actuator
motor is operating.)
0V
Battery
voltage
4WD shift switch: 4LO 0V
Continuity should exist.
SDIA2694E
Continuity should exist.
SDIA2695E
Revision: October 2008
2009 Pathfinder
P1810 NEUTRAL-4LO SWITCH
DLN-35
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
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4. Push and release neutral-4LO switch and check continuity
between neutral-4LO switch terminals 12 and 13.
Are inspection results normal?
YES >> GO TO 5.
NO >> Replace neutral-4LO switch. Refer to DLN-18, "Compo-
nent Parts Location".
5.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-85, "Reference Value".
Are inspection results normal?
YES >> GO TO 6.
NO >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
6.CHECK DTC
Drive the vehicle and then perform self-diagnosis.
Are inspection results normal?
YES >> Inspection End.
NO >> Replace transfer control unit. Refer to DLN-136, "Removal and Installation".
Component Inspection INFOID:0000000003937208
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect neutral-4LO switch harness connector.
3. Remove neutral-4LO switch. Refer to DLN-18, "Component Parts Location".
4. Push and release neutral-4LO switch and check continuity
between neutral-4LO switch terminals 12 and 13.
5. If the inspection results are abnormal replace the neutral-4LO
switch.
Terminal Condition Continuity
12 - 13 Push neutral-4LO switch Yes
Release neutral-4LO switch No
SDIA2696E
Terminal Condition Continuity
12 - 13 Push neutral-4LO switch Yes
Release neutral-4LO switch No
SDIA2696E
Revision: October 2008
2009 Pathfinder
DLN-36
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1813 4WD SHIFT SWITCH
P1813 4WD SHIFT SWITCH
Description INFOID:0000000003937209
The 4WD shift switch allows the driver to select AUTO, 2WD or 4WD and 4H or 4LO. DTC P1813 will set if
more than two switch inputs are simultaneously detected by the transfer control unit due to a short circuit in the
4WD shift switch.
DTC Logic INFOID:0000000003937210
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1813 displayed?
YES >> Perform diagnosis procedure. Refer to DLN-36, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937211
1.CHECK 4WD SHIFT SWITCH SIGNAL
With CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-III.
3. Read out ON/OFF switching action of the “2WD SWITCH”, “AUTO SWITCH”, “LOCK SWITCH” and “4L
SWITCH” while operating 4WD shift switch.
Without CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Check voltage between transfer control unit harness connector
terminals and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1813] 4WD MODE SW More than two switch inputs are simulta-
neously detected due to short circuit of
4WD shift switch.
Refer to DLN-36.
Connector Terminal Condition Voltage (Ap-
prox.)
M152
9 - ground 4WD shift switch: 2WD Battery voltage
4WD shift switch: AUTO, 4H or 4LO 0V
18 - ground
4WD shift switch: 4H Battery voltage
4WD shift switch: 2WD, AUTO or
4LO 0V
23 - ground 4WD shift switch: 4LO Battery voltage
4WD shift switch: 2WD, AUTO or 4H 0V
24 - ground 4WD shift switch: AUTO Battery voltage
4WD shift switch: 2WD, 4H or 4LO 0V
WDIA0167E
Revision: October 2008
2009 Pathfinder
P1813 4WD SHIFT SWITCH
DLN-37
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
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2.CHECK 4WD SHIFT SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect 4WD shift switch harness connector.
3. Check voltage between 4WD shift switch harness connector ter-
minal 1 and ground.
4. Turn ignition switch “ON”. (Do not start engine.)
5. Check voltage between 4WD shift switch harness connector ter-
minal 1 and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the following. If any items are damaged, repair
or replace damaged parts.
• Harness for short or open between transfer shut off
relay harness connector E155 terminal 5.
Power suppy circuit for transfer control unit. Refer to DLN-27, "Diagnosis Procedure".
3.CHECK HARNESS BETWEEN 4WD SHIFT SWITCH AND TRANSFER CONTROL UNIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the 4WD shift switch harness connector.
3. Check continuity between the following terminals.
- Transfer control unit harness connector M152 terminal 9 and
4WD shift switch harness connector M141 terminal 2.
- Transfer control unit harness connector M152 terminal 18 and
4WD shift switch harness connector M141 terminal 5.
- Transfer control unit harness connector M152 terminal 23 and
4WD shift switch harness connector M141 terminal 6.
- Transfer control unit harness connector M152 terminal 24 and
4WD shift switch harness connector M141 terminal 3.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK 4WD SHIFT SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect 4WD shift switch harness connector.
Connector Terminal Voltage (Approx.)
M141 1 - Ground 0V
WDIA0183E
Connector Terminal Voltage (Approx.)
M141 1 - Ground Battery voltage
WDIA0184E
Continuity should exist. WDIA0185E
Revision: October 2008
2009 Pathfinder
DLN-38
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1813 4WD SHIFT SWITCH
3. Operate 4WD shift switch and check continuity between 4WD
shift switch terminals.
OK or NG
OK >> GO TO 5.
NG >> Replace 4WD shift switch.
5.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-85, "Reference Value".
OK or NG
OK >> GO TO 6.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
6.CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> Inspection End.
NG >> Replace transfer control unit. Refer to DLN-136, "Removal and Installation".
Component Inspection INFOID:0000000003937212
4WD SHIFT SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect 4WD shift switch harness connector.
3. Operate 4WD shift switch and check continuity between 4WD
shift switch terminals.
Connector Terminal Condition Continuity
M141
1 - 2
4WD shift switch: 2WD Yes
4WD shift switch: AUTO, 4H and
4LO No
1 - 3
4WD shift switch: AUTO Yes
4WD shift switch: 2WD, 4H and
4LO No
1 - 4
4WD shift switch: 2WD No
4WD shift switch: AUTO, 4H and
4LO Yes
1 - 5
4WD shift switch: 4H Yes
4WD shift switch: 2WD, AUTO,
and 4LO No
1 - 6
4WD shift switch: 4LO Yes
4WD shift switch: 2WD, AUTO and
4H No
WDIA0168E
WDIA0168E
Revision: October 2008
2009 Pathfinder
P1813 4WD SHIFT SWITCH
DLN-39
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4. If NG, replace the 4WD shift switch.
Connector Terminal Condition Continuity
M141
1 - 2
4WD shift switch: 2WD Yes
4WD shift switch: AUTO, 4H and
4LO No
1 - 3
4WD shift switch: AUTO Yes
4WD shift switch: 2WD, 4H and
4LO No
1 - 4
4WD shift switch: 2WD No
4WD shift switch: AUTO, 4H and
4LO Yes
1 - 5
4WD shift switch: 4H Yes
4WD shift switch: 2WD, AUTO,
and 4LO No
1 - 6
4WD shift switch: 4LO Yes
4WD shift switch: 2WD, AUTO and
4H No
Revision: October 2008
2009 Pathfinder
DLN-40
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1814 WAIT DETECTION SWITCH
P1814 WAIT DETECTION SWITCH
Description INFOID:0000000003937213
The wait detection switch detects if the transfer case is in 4WD. DTC P1814 will set if an improper signal from
the wait detection switch is input due to open or short circuit.
DTC Logic INFOID:0000000003937214
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1814 detected?
YES >> Perform diagnosis procedure. Refer to DLN-40, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937215
1.CHECK WAIT DETECTION SWITCH SIGNAL
With CONSULT-III
1. Start engine.
2. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-III.
3. Read out the value of “WAIT DETCT SW”.
Without CONSULT-III
1. Start engine.
2. Check voltage between transfer control unit harness connector
terminal and ground.
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1814] 4WD DETECT SWITCH
Improper signal from wait detection
switch is input due to open or short cir-
cuit. Refer to DLN-40.
Condition Display value
Vehicle stopped
Engine running
A/T selector lever “N” position
Brake pedal depressed
4WD shift switch: 2WD, AUTO
or 4H OFF
4WD shift switch: 4H to 4LO
(While actuator motor is operat-
ing.)
OFF ON
4WD shift switch: 4LO to 4H
(While actuator motor is operat-
ing.) ON OFF
4WD shift switch: 4LO ON
SDIA2701E
Revision: October 2008
2009 Pathfinder
P1814 WAIT DETECTION SWITCH
DLN-41
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OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND WAIT DETECTION SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the wait detection switch harness connector.
3. Check continuity between transfer control unit harness connec-
tor M153 terminal 43 and wait detection switch harness connec-
tor F59 terminal 10.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect wait detection switch harness connector.
3. Check continuity between wait detection switch harness con-
nector F59 terminal 11 and ground.
Also check harness for short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to power in harness or con-
nectors.
4.CHECK WAIT DETECTION SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect wait detection switch harness connector.
3. Remove wait detection switch. Refer to DLN-18, "Component Parts Location".
Connector Terminal Condition Voltage
(Approx.)
M153 43 -
Ground
Vehicle stopped
Engine running
A/T selector lever
“N” position
Brake pedal de-
pressed
4WD shift switch:
2WD, AUTO or 4H
Battery
voltage
4WD shift switch: 4H to
4LO (While actuator
motor is operating.)
Battery
voltage
0V
4WD shift switch: 4LO
to 4H (While actuator
motor is operating.)
0V
Battery
voltage
4WD shift switch: 4LO 0V
Continuity should exist.
SDIA2702E
Continuity should exist.
SDIA2703E
Revision: October 2008
2009 Pathfinder
DLN-42
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1814 WAIT DETECTION SWITCH
4. Push and release wait detection switch and check continuity
between wait detection switch terminals 10 and 11.
OK or NG
OK >> GO TO 5.
NG >> Replace wait detection switch.
5.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-85, "Reference Value".
OK or NG
OK >> GO TO 6.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
6.CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> Inspection End.
NG >> Replace transfer control unit. Refer to DLN-136, "Removal and Installation".
Component Inspection INFOID:0000000003937216
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect wait detection switch harness connector.
3. Remove wait detection switch. Refer to DLN-18, "Component Parts Location".
4. Push and release wait detection switch and check continuity
between wait detection switch terminals 10 and 11.
5. If the inspection results are abnormal replace the wait detection
switch.
Terminal Condition Continuity
10 - 11 Push wait detection switch Yes
Release wait detection switch No
WDIA0186E
Terminal Condition Continuity
10 - 11 Push wait detection switch Yes
Release wait detection switch No
SDIA2704E
Revision: October 2008
2009 Pathfinder
P1816 PNP SWITCH
DLN-43
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
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P1816 PNP SWITCH
Description INFOID:0000000003937217
The A/T PNP switch transmits the A/T position indicator signal (PNP switch signal) via CAN communication to
the transfer control unit. DTC P1816 will set when the A/T PNP switch signal is malfunctioning or there is a
communication error.
DTC Logic INFOID:0000000003937218
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1816 displayed?
YES >> Perform diagnosis procedure. Refer to DLN-43, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937219
1.CHECK DTC WITH TCM
Perform self-diagnosis with TCM. Refer to TM-36, "CONSULT-III Function (TRANSMISSION)".
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-85, "Reference Value".
Are inspection results normal?
YES >> GO TO 3.
NO >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
3.CHECK DTC
Drive the vehicle and then perform self-diagnosis.
Are inspection results normal?
YES >> Inspection End.
NO >> Perform self-diagnosis with TCM again.
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1816] PNP SW/CIRC When A/T PNP switch signal is malfunc-
tion or communication error between the
control units.
Refer to DLN-43.
Revision: October 2008
2009 Pathfinder
DLN-44
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1817 ACTUATOR MOTOR
P1817 ACTUATOR MOTOR
Description INFOID:0000000003937220
The actuator motor receives signals from the transfer control unit and controls shift rods which shift the trans-
fer case. DTC P1817 will set when any of the following occur:
Motor does not operate properly due to open or short circuit in actuator motor.
Malfunction is detected in the actuator motor. (When 4WD shift switch is operated and actuator motor does
not operate)
Malfunction is detected in transfer shift high relay or transfer shift low relay.
DTC Logic INFOID:0000000003937221
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1817 detected?
YES >> Perform diagnosis procedure. Refer to DLN-44, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937222
1.CHECK ACTUATOR MOTOR SIGNAL
With CONSULT-III
1. Start engine.
2. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-III.
3. Read out the value of “SHIFT ACT1”, “SHIFT AC MON1”, “SHIFT ACT2” and “SHIFT AC MON2”.
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1817] SHIFT ACTUATOR
Motor does not operate properly due
to open or short circuit in actuator mo-
tor.
Malfunction is detected in the actuator
motor. (When 4WD shift switch is op-
erated and actuator motor is not oper-
ated)
Malfunction is detected in transfer shift
high relay and transfer shift low relay.
Refer to DLN-44.
Monitored
item Condition Display
value
SHIFT ACT1
Vehicle stopped
Engine running
A/T selector lever “N” posi-
tion
Brake pedal depressed
4WD shift switch: 4H
to 4LO (“Wait” func-
tion is operating.)
ON
Except the above OFF
SHIFT AC
MON1
Vehicle stopped
Engine running
A/T selector lever “N” posi-
tion
Brake pedal depressed
4WD shift switch: 4H
to 4LO (“Wait” func-
tion is operating.) ON
Except the above OFF
Revision: October 2008
2009 Pathfinder
P1817 ACTUATOR MOTOR
DLN-45
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Without CONSULT-III
1. Start engine.
2. Check voltage between transfer control unit harness connector
terminal and ground.
OK or NG
OK >> GO TO 7.
NG >> GO TO 2.
2.CHECK ACTUATOR MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay.
SHIFT ACT2
Vehicle stopped
Engine running
A/T selector lever “N” posi-
tion
Brake pedal depressed
4WD shift switch:
4LO to 4H (“Wait”
function is operating.)
ON
Except the above OFF
SHIFT AC
MON2
Vehicle stopped
Engine running
A/T selector lever “N” posi-
tion
Brake pedal depressed
4WD shift switch:
4LO to 4H (“Wait”
function is operating.) ON
Except the above OFF
Connector Terminal Condition Voltage
(Approx.)
M152
4 -
Ground
Vehicle stopped
Engine running
A/T selector lever
“N” position
Brake pedal de-
pressed
4WD shift switch: 4H to
4LO (“Wait” function is
operating.)
Battery
voltage
Except the above 0V
13 -
Ground
Vehicle stopped
Engine running
A/T selector lever
“N” position
Brake pedal de-
pressed
4WD shift switch: 4LO
to 4H (“Wait” function
is operating.)
Battery
voltage
Except the above 0V
M153
33 -
Ground
Vehicle stopped
Engine running
A/T selector lever
“N” position
Brake pedal de-
pressed
4WD shift switch: 4H to
4LO (“Wait” function is
operating.)
Battery
voltage
Except the above 0V
42 -
Ground
Vehicle stopped
Engine running
A/T selector lever
“N” position
Brake pedal de-
pressed
4WD shift switch: 4LO
to 4H (“Wait” function
is operating.)
Battery
voltage
Except the above 0V
Monitored
item Condition Display
value
SDIA2705E
Revision: October 2008
2009 Pathfinder
DLN-46
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1817 ACTUATOR MOTOR
3. Check voltage between transfer shift high relay harness connec-
tor E46 terminal 5, transfer shift low relay harness connector
E47 terminal 5 and ground.
4. Turn ignition switch “ON”. (Do not start engine.)
5. Check voltage between transfer shift high relay harness connec-
tor E46 terminal 5, transfer shift low relay harness connector
E47 terminal 5 and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
20A fuse (No. 58, located in the fuse and relay box).
Harness for short or open between battery, transfer shift high harness connector terminal 5 and
transfer shift low harness connector terminal 5.
3.CHECK ACTUATOR MOTOR GROUND CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay. Refer to DLN-18, "Component Parts Loca-
tion".
3. Check continuity between transfer shift high relay harness con-
nector E46 terminals 1 and 4, and transfer shift low relay har-
ness connector E47 terminals 1 and 4 and ground.
Also check harness for short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to power in harness or con-
nectors.
4.CHECK TRANSFER SHIFT RELAYS
1. Turn ignition switch “OFF”.
2. Remove transfer shift high relay and transfer shift low relay.
3. Apply 12V direct current between transfer shift relay terminals 1
and 2.
4. Check continuity between relay terminals 3 and 4, 3 and 5.
OK or NG
Connector Terminal Voltage (Approx.)
E46 5 - Ground Battery voltage
E47 5 - Ground
SDIA2707E
Connector Terminal Voltage (Approx.)
E46 5 - Ground Battery voltage
E47 5 - Ground
SDIA2706E
Continuity should exist.
SDIA2708E
Terminal Condition Continuity
3 - 4 12V direct current supply between terminals 1 and 2 No
OFF Yes
3 - 5 12V direct current supply between terminals 1 and 2 Yes
OFF No
LDIA0099E
Revision: October 2008
2009 Pathfinder
P1817 ACTUATOR MOTOR
DLN-47
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OK >> GO TO 5.
NG >> Replace the transfer shift relay.
5.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the transfer control device (actuator motor) har-
ness connector.
3. Remove transfer shift high relay and transfer shift low relay.
4. Check continuity between the following terminals.
- Transfer control unit harness connector M152 terminal 4 and
transfer shift high relay harness connector E46 terminal 2.
- Transfer control unit harness connector M152 terminal 13 and
transfer shift low relay harness connector E47 terminal 2.
- Transfer control unit harness connector M153 terminal 33 and
transfer shift high relay harness connector E46 terminal 3.
- Transfer control unit harness connector M153 terminal 42 and
transfer shift low relay harness connector E47 terminal 3.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND ACTUATOR MOTOR
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the transfer control device (actuator motor) har-
ness connector.
3. Check continuity between the following terminals.
- Transfer control unit harness connector M153 terminal 33 and
transfer control device (actuator motor) harness connector F58
terminal 21.
- Transfer control unit harness connector M153 terminal 42 and
transfer control device (actuator motor) harness connector F58
terminal 24.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK ACTUATOR MOTOR
1. Remove transfer control device. Refer to DLN-142, "Removal and Installation".
SDIA2711E
Continuity should exist.
SDIA2712E
Continuity should exist.
SDIA2710E
Revision: October 2008
2009 Pathfinder
DLN-48
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1817 ACTUATOR MOTOR
2. Check operation by applying battery voltage to transfer control
device (actuator motor) terminals 21 and 24.
CAUTION:
Do not operate actuator motor for more than 1 second.
Change the actuator motor position to “HIGH” when
installing.
Be careful not to overheat the harness.
3. Check resistance between transfer control device (actuator
motor) terminals 21 and 24.
OK or NG
OK >> GO TO 8.
NG >> Replace transfer control device (actuator motor).
8.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-85, "Reference Value".
OK or NG
OK >> GO TO 9.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
9.CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> Inspection End.
NG >> Replace transfer control unit. Refer to DLN-136, "Removal and Installation".
Component Inspection INFOID:0000000003937223
TRANSFER SHIFT RELAY
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay. Refer to DLN-18, "Component Parts Loca-
tion".
3. Apply 12V direct current between transfer shift relay terminals 1
and 2.
4. Check continuity between relay terminals 3 and 4, 3 and 5.
5. If NG, replace transfer shift relay.
TRANSFER CONTROL DEVICE
1. Remove transfer control device. Refer to DLN-142, "Removal and Installation".
Terminal Actuator motor
21 (Battery voltage) - 24 (Ground) Clockwise rotate
24 (Battery voltage) - 21 (Ground) Counterclockwise rotate
21 - 24 : Approx. 0.2
WDIA0224E
SDIA3252E
Terminal Condition Continuity
3 - 4 12V direct current supply between terminals 1 and 2 Yes
OFF No
3 - 5 12V direct current supply between terminals 1 and 2 Yes
OFF No LDIA0099E
Revision: October 2008
2009 Pathfinder
P1817 ACTUATOR MOTOR
DLN-49
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2. Check operation by applying battery voltage to transfer control
device (actuator motor) terminals 21 and 24.
CAUTION:
Do not operate actuator motor for more than 1 second.
Change the actuator motor position to “HIGH” when
installing.
Be careful not to overheat the harness.
3. Check resistance between transfer control device (actuator
motor) terminals 21 and 24.
4. If NG, replace transfer control device (actuator motor).
Terminal Actuator motor
21 (Battery voltage) - 24 (Ground) Clockwise rotate
24 (Battery voltage) - 21 (Ground) Counterclockwise rotate WDIA0224E
21 - 24 : Approx. 0.2
SDIA3252E
Revision: October 2008
2009 Pathfinder
DLN-50
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1818 ACTUATOR POSITION SWITCH
P1818 ACTUATOR POSITION SWITCH
Description INFOID:0000000003937224
The actuator position switch detects the current actuator motor range. DTC P1818 will set if either of the fol-
lowing occur:
Improper signal from actuator position switch is input due to open or short circuit.
Malfunction is detected in actuator position switch.
DTC Logic INFOID:0000000003937225
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1818 detected?
YES >> Perform diagnosis procedure. Refer to DLN-50, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937226
1.CHECK ACTUATOR POSITION SWITCH SIGNAL
With CONSULT-III
1. Start engine.
2. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-III.
3. Read out the value of “SHIFT POS SW1” and “SHIFT POS SW2”.
Without CONSULT-III
1. Start engine.
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1818] SHIFT ACT POSI SW
Improper signal from actuator position
switch is input due to open or short cir-
cuit.
Malfunction is detected in the actuator
position switch.
Refer to DLN-50.
Monitored item Condition Display value
SHIFT POS SW1
Vehicle stopped
Engine running
A/T selector lever
“N” position
Brake pedal de-
pressed
4WD shift switch: 4LO ON
4WD shift switch:
2WD, AUTO or 4H OFF
SHIFT POS SW2
Vehicle stopped
Engine running
A/T selector lever
“N” position
Brake pedal de-
pressed
4WD shift switch: 4H,
AUTO or 2WD ON
4WD shift switch: 4LO OFF
Revision: October 2008
2009 Pathfinder
P1818 ACTUATOR POSITION SWITCH
DLN-51
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2. Check voltage between transfer control unit harness connector
terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND ACTUATOR POSITION SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the transfer control device (actuator position
switch) harness connector.
3. Check continuity between the following terminals.
- Transfer control unit harness connector M153 terminal 27 and
transfer control device (actuator position switch) harness con-
nector F58 terminal 23.
- Transfer control unit harness connector M153 terminal 44 and
transfer control device (actuator position switch) harness con-
nector F58 terminal 20.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control device (actuator position switch) harness connector.
3. Check continuity between transfer control device (actuator posi-
tion switch) harness connector F58 terminal 22 and ground.
Also check harness for short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to power in harness or con-
nectors.
4.CHECK ACTUATOR POSITION SWITCH
1. Remove transfer control device. Refer to DLN-142, "Removal and Installation".
Connector Terminal Condition Voltage
(Approx.)
M153
27 -
Ground
Vehicle stopped
Engine running
A/T selector le-
ver “N” position
Brake pedal de-
pressed
4WD shift switch: 4H,
AUTO or 2WD 0V
4WD shift switch: 4LO Battery
voltage
44 -
Ground
Vehicle stopped
Engine running
A/T selector le-
ver “N” position
Brake pedal de-
pressed
4WD shift switch: 4LO 0V
4WD shift switch:
2WD, AUTO or 4H Battery
voltage
SDIA2715E
Continuity should exist.
SDIA2716E
Continuity should exist.
SDIA2717E
Revision: October 2008
2009 Pathfinder
DLN-52
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1818 ACTUATOR POSITION SWITCH
2. Check operation by applying battery voltage to transfer control
device (actuator motor) terminals 21 and 24.
CAUTION:
Do not operate actuator motor for more than 1 second.
Change the actuator motor position to “HIGH” when
installing.
Be careful not to overheat the harness.
OK or NG
YES >> GO TO 5.
NO >> Replace transfer control device.
5.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-85, "Reference Value".
OK or NG
OK >> GO TO 6.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
6.CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> Inspection End.
NG >> Replace transfer control device.
Component Inspection INFOID:0000000003937227
1. Remove transfer control device. Refer to DLN-142, "Removal and Installation".
2. Check operation by applying battery voltage to transfer control
device (actuator motor) terminals 21 and 24.
CAUTION:
Do not operate actuator motor for more than 1 second.
Change the actuator motor position to HIGH when install-
ing.
Be careful not to overheat the harness.
3. If the inspection results are abnormal replace transfer control device (actuator motor).
Terminal Continuity Continuity
24 (Battery voltage) - 21
(Ground)
20 - 22 YES
22 - 23 NO
21 (Battery voltage) - 24
(Ground)
22 - 23 YES
20 - 22 NO
LDIA0101E
Terminal Continuity Continuity
24 (Battery voltage) - 21
(Ground)
20 - 22 Yes
22 - 23 No
21 (Battery voltage) - 24
(Ground)
22 - 23 Yes
20 - 22 No
LDIA0101E
Revision: October 2008
2009 Pathfinder
P1819 TRANSFER CONTROL DEVICE
DLN-53
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P1819 TRANSFER CONTROL DEVICE
Description INFOID:0000000003937228
The transfer control device integrates the actuator motor and actuator position switch. DTC P1819 will set if
either of the following conditions exist:
Malfunction occurs in transfer control device actuator circuit.
Malfunction is detected in the transfer shut off relay.
DTC Logic INFOID:0000000003937229
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1819 detected?
YES >> Perform diagnosis procedure. Refer to DLN-53, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937230
1.CHECK POWER SUPPLY
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Connect transfer control unit harness connector.
3. Check voltage between transfer control unit harness connector
terminal and ground.
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1819] SHIFT ACT CIR
Transfer control device actuator circuit
is shorted or open. (Malfunctions are
detected when transfer shift relay cir-
cuit is open/shorted or relay monitor
circuit is open/shorted.)
Malfunction occurs in transfer control
device drive circuit.
Malfunction is detected in transfer
shut off relay.
Refer to DLN-53.
Connector Terminal Voltage (Approx.)
M152 16 - Ground 0V
22 - Ground
M153 30 - Ground Battery voltage
SDIA2834E
Revision: October 2008
2009 Pathfinder
DLN-54
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1819 TRANSFER CONTROL DEVICE
4. Turn ignition switch “ON”. (Do not start engine.)
5. Check voltage between transfer control unit harness connector
terminals and ground.
OK or NG
OK >> GO TO 2.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
10A fuse (No. 59, located in the fuse and relay box).
Harness for short or open between battery and transfer shut off relay harness connector E155
terminal 1.
Harness for short or open between transfer shut off relay harness connector E155 terminal 2
and transfer control unit harness connector terminal 30.
Harness for short or open between battery and transfer shut off relay harness connector E155
terminal 3.
Harness for short or open between transfer shut off relay harness connector E155 terminal 5
and transfer control unit harness connector 22.
Transfer shut off relay. Refer to DLN-28, "Component Inspection".
2.CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector.
3. Check continuity between transfer control unit harness connec-
tor M152 terminals 3, 6 and M153 terminal 45 and ground.
Also check harness for short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to power in harness or con-
nectors.
3.CHECK ACTUATOR MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay. Refer to DLN-18, "Component Parts Loca-
tion".
3. Check voltage between transfer shift high relay harness connec-
tor E46 terminal 5, transfer shift low relay harness connector
E47 terminal 5 and ground.
Connector Terminal Voltage (Approx.)
M152 16 - Ground Battery voltage
22 - Ground
M153 30 - Ground 0V
SDIA2835E
Continuity should exist.
SDIA2691E
Connector Terminal Voltage (Approx.)
E46 5 - Ground Battery voltage
E47 5 - Ground
SDIA2707E
Revision: October 2008
2009 Pathfinder
P1819 TRANSFER CONTROL DEVICE
DLN-55
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4. Turn ignition switch “ON”. (Do not start engine.)
5. Check voltage between transfer shift high relay harness connec-
tor E46 terminal 5, transfer shift low relay harness connector
E47 terminal 5 and ground.
OK or NG
OK >> GO TO 4.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
20A fuse [No. 58, located in the fuse and relay box].
Harness for short or open between battery, transfer shift high harness connector E46 terminal 5
and transfer shift low harness connector E47 terminal 5.
4.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and transfer control device (actuator motor) harness
connector.
3. Remove transfer shift high relay and transfer shift low relay.
4. Check continuity between the following terminals.
- Transfer control unit harness connector M153 terminal 33 and
transfer shift high relay harness connector E46 terminal 3.
- Transfer control unit harness connector M153 terminal 42 and
transfer shift low relay harness connector E47 terminal 3.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.CHECK TRANSFER SHIFT RELAY GROUND CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay.
3. Check continuity between transfer shift high relay harness con-
nector E46 (A) terminals 1 and 4 and transfer shift low relay har-
ness connector E47 (B) terminals 1 and 4 and ground.
Also check harness for short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to power in harness or con-
nectors.
6.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-85, "Reference Value".
OK or NG
OK-1 >> With CONSULT-III: GO TO 7.
OK-2 >> Without CONSULT-III: GO TO 8.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
7.PERFORM SELF-DIAGNOSIS (WITH CONSULT-III)
Connector Terminal Voltage (Approx.)
E46 5 - Ground Battery voltage
E47 5 - Ground
SDIA2706E
Continuity should exist.
SDIA2712E
Continuity should exist.
AWDIA0619Z
Z
Revision: October 2008
2009 Pathfinder
DLN-56
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1819 TRANSFER CONTROL DEVICE
With CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with CONSULT-III.
3. Touch “ERASE”.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Perform the self-diagnosis again.
Is the SHIFT ACT CIR [P1819] displayed?
YES >> Replace transfer control unit. Refer to DLN-136, "Removal and Installation".
NO >> Inspection End.
8.PERFORM SELF-DIAGNOSIS (WITHOUT CONSULT-III)
Without CONSULT-III
1. Perform the self-diagnosis and then erase self-diagnostic results. Refer to DLN-22, "CONSULT-III Func-
tion (ALL MODE AWD/4WD)".
2. Perform the self-diagnosis again.
Do the self-diagnostic results indicate transfer control device?
YES >> Replace transfer control unit.
NO >> Inspection End.
Revision: October 2008
2009 Pathfinder
P1820 ENGINE SPEED SIGNAL
DLN-57
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
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P1820 ENGINE SPEED SIGNAL
Description INFOID:0000000003937231
The ECM transmits the engine speed signal via CAN communication to the transfer control unit. DTC P1820
will set when either of the following occur:
Malfunction is detected in engine speed signal that is output from the ECM.
Improper signal is input while driving.
DTC Logic INFOID:0000000003937232
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1820 detected?
YES >> Perform diagnosis procedure. Refer to DLN-57, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937233
1.CHECK DTC WITH ECM
Perform self-diagnosis with ECM. Refer to EC-546, "CONSULT-III Function (ENGINE)".
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-85, "Reference Value".
Are the inspection results normal?
YES >> GO TO 3.
NO >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
3.CHECK DTC
Drive the vehicle and then perform self-diagnosis.
Are the inspection results normal?
YES >> Inspection End.
NO >> Perform self-diagnosis with ECM again.
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1820] ENGINE SPEED SIG
Malfunction is detected in engine
speed signal that is output from ECM
through CAN communication.
Improper signal is input while driving.
Refer to DLN-57.
Revision: October 2008
2009 Pathfinder
DLN-58
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1822 CLUTCH PRESSURE SOLENOID
P1822 CLUTCH PRESSURE SOLENOID
Description INFOID:0000000003937234
Proper voltage is not applied to the clutch pressure solenoid valve due to open or short circuit.
DTC Logic INFOID:0000000003937235
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1822 displayed?
YES >> Perform diagnosis procedure. Refer to DLN-58, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937236
1.CHECK CLUTCH PRESSURE SIGNAL
With CONSULT-III
1. Start engine.
2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT-III.
3. Read out the value of DUTY SOLENOID.
Without CONSULT-III
1. Start engine.
2. Check voltage between transfer control unit harness connector
terminal and ground.
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1822] DUTY SOLENOID
Proper voltage is not applied to clutch
pressure solenoid valve due to open or
short circuit.
Refer to DLN-58.
Condition Display value
Vehicle stopped
Engine running
A/T selector lever N position
Brake pedal depressed
4WD shift switch: 2WD 4%
4WD shift switch: AUTO 96 - 4%
4WD shift switch: 4H or
4LO 4%
Connector Terminal Condition Voltage
(Approx.)
M152
10 -
Ground
Vehicle stopped
Engine running
A/T selector lever
N position
Brake pedal de-
pressed
4WD shift switch:
AUTO 4 - 14V
4WD shift switch:
2WD, 4H or 4LO Less than
1V
19 -
Ground
Vehicle stopped
Engine running
A/T selector lever
N position
Brake pedal de-
pressed
4WD shift switch:
AUTO 1.5 - 3V
4WD shift switch:
2WD, 4H or 4LO
Less than
1V
SDIA2719E
Revision: October 2008
2009 Pathfinder
P1822 CLUTCH PRESSURE SOLENOID
DLN-59
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
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Are the inspection results normal?
YES >> GO TO 7.
NO >> GO TO 2.
2.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND CLUTCH PRESSURE SOLENOID
VALVE
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector, transfer terminal cord assembly harness connector
and transfer dropping resistor.
3. Check continuity between transfer control unit harness connec-
tor M152 terminal 19 and transfer terminal cord assembly har-
ness connector F56 terminal 6.
4. Check continuity between transfer dropping resistor harness
connector E135 terminal 2 and transfer terminal cord assembly
harness connector F56 terminal 6.
Also check harness for short to ground and short to power.
Are the inspection results normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER DROPPING RESISTOR
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and transfer dropping resistor harness connector.
3. Check continuity between transfer control unit harness connec-
tor M152 terminal 10 and transfer dropping resistor harness
connector E135 terminal 1.
Also check harness for short to ground and short to power.
Are the inspection results normal?
YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer terminal cord assembly harness connector.
Continuity should exist.
SDIA2720E
Continuity should exist.
SDIA2721E
Continuity should exist.
SDIA2722E
Revision: October 2008
2009 Pathfinder
DLN-60
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1822 CLUTCH PRESSURE SOLENOID
3. Check continuity between transfer terminal cord assembly har-
ness connector F56 terminal 19 and ground.
Also check harness for short to ground and short to power.
Are the inspection results normal?
YES >> GO TO 5.
NO >> Repair open circuit or short to ground or short to power
in harness or connectors.
5.CHECK CLUTCH PRESSURE SOLENOID
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer terminal cord assembly harness connector.
3. Check resistance between transfer terminal cord assembly har-
ness connector F56 terminals 6 and 19.
Are the inspection results normal?
YES >> GO TO 6.
NO >> Replace clutch pressure solenoid. Refer to DLN-18,
"Component Parts Location".
6.CHECK TRANSFER DROPPING RESISTOR
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer dropping resistor harness connector.
3. Check resistance between transfer dropping resistor terminals 1
and 2.
Are the inspection results normal?
YES >> GO TO 7.
NO >> Replace transfer dropping resistor.
7.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-85, "Reference Value".
Are the inspection results normal?
YES >> GO TO 8.
NO >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
8.CHECK DTC
Drive the vehicle and then perform self-diagnosis.
Are the inspection results normal?
YES >> Inspection End.
NO >> Replace transfer control unit. Refer to DLN-136, "Removal and Installation".
Component Inspection INFOID:0000000003937237
CLUTCH PRESSURE SOLENOID
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
Continuity should exist.
SDIA2723E
6 - 19 : Approx. 3.0 - 3.4
WDIA0225E
1 - 2 : Approx. 11.2 - 12.8
SDIA2725E
Revision: October 2008
2009 Pathfinder
P1822 CLUTCH PRESSURE SOLENOID
DLN-61
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2. Disconnect transfer terminal cord assembly harness connector.
3. Check resistance between transfer terminal cord assembly ter-
minals 6 and 19.
4. If the inspection results are abnormal replace clutch pressure
solenoid. Refer to DLN-18, "Component Parts Location".
TRANSFER DROPPING RESISTOR
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer dropping resistor harness connector.
3. Check resistance between transfer dropping resistor terminals 1
and 2.
4. If the inspection results are abnormal replace transfer dropping
resistor. Refer to DLN-18, "Component Parts Location".
6 - 19 : Approx. 3.0 - 3.4
WDIA0225E
1 - 2 : Approx. 11.2 - 12.8
SDIA2725E
Revision: October 2008
2009 Pathfinder
DLN-62
< COMPONENT DIAGNOSIS > [TRANSFER: ATX14B]
P1823 2-4 SOLENOID
P1823 2-4 SOLENOID
Description INFOID:0000000003937238
Proper voltage is not applied to the 2-4WD solenoid valve due to an open or short circuit.
DTC Logic INFOID:0000000003937239
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1823 displayed?
YES >> Perform diagnosis procedure. Refer to DLN-62, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure INFOID:0000000003937240
1.CHECK 4WD SHIFT SWITCH SYSTEM
Perform self-diagnosis. Refer to DLN-22, "CONSULT-III Function (ALL MODE AWD/4WD)".
Is the "4WD MOD SW [P1814]" (with CONSULT-III) or "Flickering pattern:16" (without CONSULT-III)
detected?
YES >> Perform trouble diagnosis for 4WD shift switch. Refer to DLN-36, "Diagnosis Procedure".
NO >> GO TO 2
2.CHECK 2-4WD SHIFT SOLENOID SIGNAL
With CONSULT-III
1. Start engine.
2. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-III.
3. Read out the value of “2-4WD SOL” and “2-4WD SOL MON”.
DTC CONSULT-III Diagnostic item is detected when... Reference
[P1823] 2-4WD SOLENOID
Proper voltage is not applied to 2-4WD
solenoid valve due to open or short cir-
cuit.
Refer to DLN-62.
Monitored
item Condition Display
value</