2007 INFINITI QX56 Factory Service Manual

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Page 1081 of 3061

INFINITI QX56 2007 Factory Service Manual DI-70
< SERVICE INFORMATION >
REAR VIEW MONITOR
1. Check continuity between rear view camera control unit harness
connector B73 terminal 8 and ground.
2. Check continuity between rear view camera cont

Page 1082 of 3061

INFINITI QX56 2007 Factory Service Manual REAR VIEW MONITOR
DI-71
< SERVICE INFORMATION >
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1. Turn ignition switch OFF.
2. Disconnect rear view camera control unit connector and display
unit connector.
3. Check

Page 1083 of 3061

INFINITI QX56 2007 Factory Service Manual DI-72
< SERVICE INFORMATION >
REAR VIEW MONITOR
2. Remove luggage side finishers LH. Refer to EI-39.
3. Disconnect rear view camera control unit electrical connector.
4. Remove screws (2) and remove r

Page 1084 of 3061

INFINITI QX56 2007 Factory Service Manual EC-1
ENGINE
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SECTION EC
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CONTENTS
ENGINE CONTROL SYSTEM
SERVICE INFORMATION ............................9
INDEX FOR DTC ...............................................

EC-1
ENGINE
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SECTION EC
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CONTENTS
ENGINE CONTROL SYSTEM
SERVICE INFORMATION ............................9
INDEX FOR DTC .................................................9
DTC No. Index ..........................................................9
Alphabetical Index ...................................................12
PRECAUTIONS ..................................................17
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................
17
On Board Diagnosis (OBD) System of Engine and
A/T ...........................................................................
17
Precaution ...............................................................17
PREPARATION ..................................................21
Special Service Tool ...............................................21
Commercial Service Tool ........................................22
ENGINE CONTROL SYSTEM ............................24
Schematic ...............................................................24
Multiport Fuel Injection (MFI) System .....................24
Electronic Ignition (EI) System ................................27
Fuel Cut Control (at No Load and High Engine
Speed) .....................................................................
27
AIR CONDITIONING CUT CONTROL ...............29
Input/Output Signal Chart ........................................29
System Description .................................................29
AUTOMATIC SPEED CONTROL DEVICE
(ASCD) ...............................................................
30
System Description .................................................30
Component Description ...........................................31
CAN COMMUNICATION ....................................32
System Description .................................................32
EVAPORATIVE EMISSION SYSTEM ................33
Description ..............................................................33
Component Inspection ............................................35
Removal and Installation .........................................37
How to Detect Fuel Vapor Leakage ........................37
ON BOARD REFUELING VAPOR RECOV-
ERY (ORVR) ......................................................
40
System Description ..................................................40
Diagnosis Procedure ...............................................40
Component Inspection .............................................42
POSITIVE CRANKCASE VENTILATION .........45
Description ...............................................................45
Component Inspection .............................................45
IVIS (INFINITI VEHICLE IMMOBILIZER SYS-
TEM-NATS) .......................................................
47
Description ...............................................................47
ON BOARD DIAGNOSTIC (OBD) SYSTEM ....48
Introduction ..............................................................48
Two Trip Detection Logic .........................................48
Emission-related Diagnostic Information .................49
Malfunction Indicator Lamp (MIL) ............................63
OBD System Operation Chart .................................65
BASIC SERVICE PROCEDURE .......................71
Basic Inspection ......................................................71
Idle Speed and Ignition Timing Check .....................75
Procedure After Replacing ECM .............................77
VIN Registration ......................................................77
Accelerator Pedal Released Position Learning .......77
Throttle Valve Closed Position Learning .................77
Idle Air Volume Learning .........................................78
Fuel Pressure Check ...............................................80
TROUBLE DIAGNOSIS ....................................82
Trouble Diagnosis Introduction ................................82
DTC Inspection Priority Chart ..................................87
Fail-Safe Chart ........................................................88
Symptom Matrix Chart .............................................90
Engine Control Component Parts Location .............94
Vacuum Hose Drawing ..........................................100
Circuit Diagram ......................................................101
ECM Harness Connector Terminal Layout ............103
ECM Terminal and Reference Value .....................103

Page 1085 of 3061

INFINITI QX56 2007 Factory Service Manual EC-2
CONSULT-II Function (ENGINE) ..........................111
Generic Scan Tool (GST) Function .......................122
CONSULT-II Reference Value in Data Monitor
Mode .........................

EC-2
CONSULT-II Function (ENGINE) ..........................111
Generic Scan Tool (GST) Function .......................122
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
124
Major Sensor Reference Graph in Data Monitor
Mode ......................................................................
127
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE .............................................................
129
Description .............................................................129
Testing Condition ...................................................129
Inspection Procedure .............................................129
Diagnosis Procedure .............................................130
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT ........................................................
138
Description .............................................................138
Diagnosis Procedure .............................................138
POWER SUPPLY AND GROUND CIRCUIT ...139
Wiring Diagram ......................................................139
Diagnosis Procedure .............................................140
Ground Inspection .................................................143
DTC U1000, U1001 CAN COMMUNICATION
LINE .................................................................
145
Description .............................................................145
On Board Diagnosis Logic .....................................145
DTC Confirmation Procedure ................................145
Wiring Diagram ......................................................146
Diagnosis Procedure .............................................146
DTC U1010 CAN COMMUNICATION .............147
Description .............................................................147
On Board Diagnosis Logic .....................................147
DTC Confirmation Procedure ................................147
Diagnosis Procedure .............................................147
DTC P0011, P0021 IVT CONTROL .................149
Description .............................................................149
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
150
On Board Diagnosis Logic .....................................150
DTC Confirmation Procedure ................................150
Wiring Diagram ......................................................152
Diagnosis Procedure .............................................155
Component Inspection ...........................................159
Removal and Installation .......................................160
DTC P0031, P0032, P0051, P0052 A/F SEN-
SOR 1 HEATER ...............................................
163
Description .............................................................163
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
163
On Board Diagnosis Logic .....................................163
DTC Confirmation Procedure ................................163
Wiring Diagram ......................................................164
Diagnosis Procedure .............................................167
Component Inspection ...........................................168
Removal and Installation .......................................169
DTC P0037, P0038, P0057, P0058 HO2S2
HEATER ...........................................................
170
Description ............................................................170
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
170
On Board Diagnosis Logic ....................................170
DTC Confirmation Procedure ................................170
Wiring Diagram .....................................................172
Diagnosis Procedure .............................................175
Component Inspection ..........................................176
Removal and Installation .......................................177
DTC P0075, P0081 IVT CONTROL SOLE-
NOID VALVE ....................................................
178
Component Description ........................................178
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
178
On Board Diagnosis Logic ....................................178
DTC Confirmation Procedure ................................178
Wiring Diagram .....................................................179
Diagnosis Procedure .............................................182
Component Inspection ..........................................183
Removal and Installation .......................................184
DTC P0101 MAF SENSOR ..............................186
Component Description ........................................186
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
186
On Board Diagnosis Logic ....................................186
DTC Confirmation Procedure ................................186
Overall Function Check .........................................188
Wiring Diagram .....................................................189
Diagnosis Procedure .............................................190
Component Inspection ..........................................192
Removal and Installation .......................................193
DTC P0102, P0103 MAF SENSOR ..................194
Component Description ........................................194
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
194
On Board Diagnosis Logic ....................................194
DTC Confirmation Procedure ................................194
Wiring Diagram .....................................................196
Diagnosis Procedure .............................................197
Component Inspection ..........................................199
Removal and Installation .......................................200
DTC P0112, P0113 IAT SENSOR ....................201
Component Description ........................................201
On Board Diagnosis Logic ....................................201
DTC Confirmation Procedure ................................201
Wiring Diagram .....................................................202
Diagnosis Procedure .............................................202
Component Inspection ..........................................204
Removal and Installation .......................................204
DTC P0117, P0118 ECT SENSOR ...................205
Component Description ........................................205
On Board Diagnosis Logic ....................................205
DTC Confirmation Procedure ................................206

Page 1086 of 3061

INFINITI QX56 2007 Factory Service Manual EC-3
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207
Diagnosis Procedure .............................................207
Component Inspectio

EC-3
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207
Diagnosis Procedure .............................................207
Component Inspection ..........................................209
Removal and Installation .......................................209
DTC P0122, P0123 TP SENSOR .....................210
Component Description .........................................210
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
210
On Board Diagnosis Logic ....................................210
DTC Confirmation Procedure ................................210
Wiring Diagram .....................................................212
Diagnosis Procedure .............................................213
Component Inspection ..........................................215
Removal and Installation .......................................216
DTC P0125 ECT SENSOR ...............................217
Component Description .........................................217
On Board Diagnosis Logic ....................................217
DTC Confirmation Procedure ................................217
Diagnosis Procedure .............................................218
Component Inspection ..........................................218
Removal and Installation .......................................219
DTC P0127 IAT SENSOR ................................220
Component Description .........................................220
On Board Diagnosis Logic ....................................220
DTC Confirmation Procedure ................................220
Diagnosis Procedure .............................................221
Component Inspection ..........................................221
Removal and Installation .......................................222
DTC P0128 THERMOSTAT FUNCTION ..........223
On Board Diagnosis Logic ....................................223
DTC Confirmation Procedure ................................223
Diagnosis Procedure .............................................223
Component Inspection ..........................................223
Removal and Installation .......................................224
DTC P0130, P0150 A/F SENSOR 1 .................225
Component Description .........................................225
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
225
On Board Diagnosis Logic ....................................225
DTC Confirmation Procedure ................................225
Overall Function Check .........................................227
Wiring Diagram .....................................................228
Diagnosis Procedure .............................................231
Removal and Installation .......................................233
DTC P0131, P0151 A/F SENSOR 1 .................234
Component Description .........................................234
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
234
On Board Diagnosis Logic ....................................234
DTC Confirmation Procedure ................................234
Wiring Diagram .....................................................236
Diagnosis Procedure .............................................239
Removal and Installation .......................................241
DTC P0132, P0152 A/F SENSOR 1 ................242
Component Description .........................................242
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
242
On Board Diagnosis Logic .....................................242
DTC Confirmation Procedure ................................242
Wiring Diagram ......................................................244
Diagnosis Procedure .............................................247
Removal and Installation .......................................249
DTC P0133, P0153 A/F SENSOR 1 ................250
Component Description .........................................250
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
250
On Board Diagnosis Logic .....................................250
DTC Confirmation Procedure ................................250
Wiring Diagram ......................................................253
Diagnosis Procedure .............................................256
Removal and Installation .......................................259
DTC P0137, P0157 HO2S2 .............................260
Component Description .........................................260
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
260
On Board Diagnosis Logic .....................................260
DTC Confirmation Procedure ................................260
Overall Function Check .........................................261
Wiring Diagram ......................................................262
Diagnosis Procedure .............................................265
Component Inspection ...........................................267
Removal and Installation .......................................269
DTC P0138, P0158 HO2S2 .............................270
Component Description .........................................270
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
270
On Board Diagnosis Logic .....................................270
DTC Confirmation Procedure ................................271
Overall Function Check .........................................272
Wiring Diagram ......................................................273
Diagnosis Procedure .............................................276
Component Inspection ...........................................280
Removal and Installation .......................................281
DTC P0139, P0159 HO2S2 .............................282
Component Description .........................................282
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
282
On Board Diagnosis Logic .....................................282
DTC Confirmation Procedure ................................282
Overall Function Check .........................................283
Wiring Diagram ......................................................284
Diagnosis Procedure .............................................287
Component Inspection ...........................................289
Removal and Installation .......................................291
DTC P0171, P0174 FUEL INJECTION SYS-
TEM FUNCTION ..............................................
292
On Board Diagnosis Logic .....................................292
DTC Confirmation Procedure ................................292

Page 1087 of 3061

INFINITI QX56 2007 Factory Service Manual EC-4
Wiring Diagram ......................................................294
Diagnosis Procedure .............................................297
DTC P0172, P0175 FUEL INJECTION SYS-
TEM FUNCTION

EC-4
Wiring Diagram ......................................................294
Diagnosis Procedure .............................................297
DTC P0172, P0175 FUEL INJECTION SYS-
TEM FUNCTION ..............................................
301
On Board Diagnosis Logic .....................................301
DTC Confirmation Procedure ................................301
Wiring Diagram ......................................................303
Diagnosis Procedure .............................................306
DTC P0181 FTT SENSOR ...............................310
Component Description .........................................310
On Board Diagnosis Logic .....................................310
DTC Confirmation Procedure ................................310
Wiring Diagram ......................................................311
Diagnosis Procedure .............................................312
Component Inspection ...........................................313
Removal and Installation .......................................313
DTC P0182, P0183 FTT SENSOR ..................314
Component Description .........................................314
On Board Diagnosis Logic .....................................314
DTC Confirmation Procedure ................................314
Wiring Diagram ......................................................315
Diagnosis Procedure .............................................315
Component Inspection ...........................................317
Removal and Installation .......................................317
DTC P0222, P0223 TP SENSOR ....................318
Component Description .........................................318
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
318
On Board Diagnosis Logic .....................................318
DTC Confirmation Procedure ................................318
Wiring Diagram ......................................................320
Diagnosis Procedure .............................................321
Component Inspection ...........................................323
Removal and Installation .......................................324
DTC P0300 - P0308 MULTIPLE CYLINDER
MISFIRE, NO. 1 - 8 CYLINDER MISFIRE .......
325
On Board Diagnosis Logic .....................................325
DTC Confirmation Procedure ................................325
Diagnosis Procedure .............................................326
DTC P0327, P0328, P0332, P0333 KS ...........332
Component Description .........................................332
On Board Diagnosis Logic .....................................332
DTC Confirmation Procedure ................................332
Wiring Diagram ......................................................333
Diagnosis Procedure .............................................334
Component Inspection ...........................................335
Removal and Installation .......................................335
DTC P0335 CKP SENSOR (POS) ...................336
Component Description .........................................336
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
336
On Board Diagnosis Logic .....................................336
DTC Confirmation Procedure ................................336
Wiring Diagram .....................................................338
Diagnosis Procedure .............................................339
Component Inspection ..........................................341
Removal and Installation .......................................341
DTC P0340 CMP SENSOR (PHASE) ..............342
Component Description ........................................342
On Board Diagnosis Logic ....................................342
DTC Confirmation Procedure ................................342
Wiring Diagram .....................................................344
Diagnosis Procedure .............................................345
Component Inspection ..........................................347
Removal and Installation .......................................348
DTC P0420, P0430 THREE WAY CATALYST
FUNCTION ........................................................
349
On Board Diagnosis Logic ....................................349
DTC Confirmation Procedure ................................349
Overall Function Check .........................................350
Diagnosis Procedure .............................................351
DTC P0441 EVAP CONTROL SYSTEM ..........354
System Description ...............................................354
On Board Diagnosis Logic ....................................354
DTC Confirmation Procedure ................................354
Overall Function Check .........................................355
Diagnosis Procedure .............................................356
DTC P0442 EVAP CONTROL SYSTEM ..........359
On Board Diagnosis Logic ....................................359
DTC Confirmation Procedure ................................359
Diagnosis Procedure .............................................360
DTC P0443 EVAP CANISTER PURGE VOL-
UME CONTROL SOLENOID VALVE ...............
366
Description ............................................................366
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
366
On Board Diagnosis Logic ....................................367
DTC Confirmation Procedure ................................367
Wiring Diagram .....................................................368
Diagnosis Procedure .............................................369
Component Inspection ..........................................372
Removal and Installation .......................................372
DTC P0444, P0445 EVAP CANISTER PURGE
VOLUME CONTROL SOLENOID VALVE .......
373
Description ............................................................373
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
373
On Board Diagnosis Logic ....................................374
DTC Confirmation Procedure ................................374
Wiring Diagram .....................................................375
Diagnosis Procedure .............................................376
Component Inspection ..........................................378
Removal and Installation .......................................378
DTC P0447 EVAP CANISTER VENT CON-
TROL VALVE ...................................................
379
Component Description .......................................

Page 1088 of 3061

INFINITI QX56 2007 Factory Service Manual EC-5
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P CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
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On Board Diagnosis Logic ..............

EC-5
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Mode .....................................................................
379
On Board Diagnosis Logic ....................................379
DTC Confirmation Procedure ................................379
Wiring Diagram .....................................................381
Diagnosis Procedure .............................................382
Component Inspection ..........................................384
DTC P0448 EVAP CANISTER VENT CON-
TROL VALVE ...................................................
386
Component Description .........................................386
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
386
On Board Diagnosis Logic ....................................386
DTC Confirmation Procedure ................................386
Wiring Diagram .....................................................388
Diagnosis Procedure .............................................389
Component Inspection ..........................................390
DTC P0451 EVAP CONTROL SYSTEM
PRESSURE SENSOR ......................................
392
Component Description .........................................392
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
392
On Board Diagnosis Logic ....................................392
DTC Confirmation Procedure ................................392
Diagnosis Procedure .............................................393
Component Inspection ..........................................394
DTC P0452 EVAP CONTROL SYSTEM
PRESSURE SENSOR ......................................
395
Component Description .........................................395
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
395
On Board Diagnosis Logic ....................................395
DTC Confirmation Procedure ................................395
Wiring Diagram .....................................................397
Diagnosis Procedure .............................................398
Component Inspection ..........................................400
DTC P0453 EVAP CONTROL SYSTEM
PRESSURE SENSOR ......................................
401
Component Description .........................................401
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
401
On Board Diagnosis Logic ....................................401
DTC Confirmation Procedure ................................401
Wiring Diagram .....................................................403
Diagnosis Procedure .............................................404
Component Inspection ..........................................407
DTC P0455 EVAP CONTROL SYSTEM ..........408
On Board Diagnosis Logic ....................................408
DTC Confirmation Procedure ................................408
Diagnosis Procedure .............................................410
DTC P0456 EVAP CONTROL SYSTEM ..........415
On Board Diagnosis Logic ....................................415
DTC Confirmation Procedure ................................416
Overall Function Check .........................................416
Diagnosis Procedure .............................................417
DTC P0460 FUEL LEVEL SENSOR ...............423
Component Description .........................................423
On Board Diagnosis Logic .....................................423
DTC Confirmation Procedure ................................423
Diagnosis Procedure .............................................424
Removal and Installation .......................................424
DTC P0461 FUEL LEVEL SENSOR ...............425
Component Description .........................................425
On Board Diagnosis Logic .....................................425
Overall Function Check .........................................425
Diagnosis Procedure .............................................426
Removal and Installation .......................................426
DTC P0462, P0463 FUEL LEVEL SENSOR
CIRCUIT ..........................................................
427
Component Description .........................................427
On Board Diagnosis Logic .....................................427
DTC Confirmation Procedure ................................427
Diagnosis Procedure .............................................428
Removal and Installation .......................................428
DTC P0500 VSS ..............................................429
Description .............................................................429
On Board Diagnosis Logic .....................................429
DTC Confirmation Procedure ................................429
Overall Function Check .........................................430
Diagnosis Procedure .............................................430
DTC P0506 ISC SYSTEM ...............................431
Description .............................................................431
On Board Diagnosis Logic .....................................431
DTC Confirmation Procedure ................................431
Diagnosis Procedure .............................................431
DTC P0507 ISC SYSTEM ...............................433
Description .............................................................433
On Board Diagnosis Logic .....................................433
DTC Confirmation Procedure ................................433
Diagnosis Procedure .............................................433
DTC P0550 PSP SENSOR ..............................435
Component Description .........................................435
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
435
On Board Diagnosis Logic .....................................435
DTC Confirmation Procedure ................................435
Wiring Diagram ......................................................436
Diagnosis Procedure .............................................437
Component Inspection ...........................................438
Removal and Installation .......................................439
DTC P0603 ECM POWER SUPPLY ...............440
Component Description .........................................440
On Board Diagnosis Logic .....................................440
DTC Confirmation Procedure ................................440
Wiring Diagram ......................................................441
Diagnosis Procedure .............................................442

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