2010 INFINITI QX56 Factory Service Manual

brake light weight refuelling maintenance schedule child restraint coolant level

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INFINITI QX56 2010 Factory Service Manual SERVICE DATA AND SPECIFICATIONS (SDS)DLN-271
< SERVICE DATA AND SPECIFICATIONS (SDS) [REAR FINAL DRIVE: R230]
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Unit: mm (in)
*: Always check with the Parts Department

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INFINITI QX56 2010 Factory Service Manual EC-1
ENGINE
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SECTION EC
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CONTENTS
ENGINE CONTROL SYSTEM
VK56DE
BASIC INSPECTION ....... .............................
8
DIAGNOSIS AND REPAIR WORKFLOW ..... .....8
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EC-1
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CONTENTS
ENGINE CONTROL SYSTEM
VK56DE
BASIC INSPECTION ....... .............................
8
DIAGNOSIS AND REPAIR WORKFLOW ..... .....8
Trouble Diagnosis Introduction ........................... ......8
INSPECTION AND ADJUSTMENT ....................13
Basic Inspection .................................................. ....13
Idle Speed and Ignition Timing Check ....................17
Procedure After Replacing ECM .............................17
VIN Registration ......................................................17
Accelerator Pedal Released Position Learning .......18
Throttle Valve Closed Position Learning .................18
Idle Air Volume Learning .........................................18
FUNCTION DIAGNOSIS ..............................21
ENGINE CONTROL SYSTEM ........................ ....21
System Diagram .................................................. ....21
Engine Control Component Parts Location .............22
MULTIPORT FUEL INJECTION SYSTEM ..... ....28
System Description ............................................. ....28
ELECTRIC IGNITION SYSTEM ..................... ....31
System Description ............................................. ....31
AIR CONDITIONING CUT CONTROL ...............32
Input/Output Signal Chart .................................... ....32
System Description .................................................32
AUTOMATIC SPEED CONTROL DEVICE
(ASCD) ...............................................................
33
System Description ............................................. ....33
Component Description ...........................................34
CAN COMMUNICATION ....................................35
System Description ............................................. ....35
COOLING FAN CONTROL ................................36
Description ..............................................................36
EVAPORATIVE EMISSION SYSTEM ...............37
Description ........................................................... ....37
INTAKE VALVE TIMING CONTROL ................40
Description ...............................................................40
ON BOARD DIAGNOSTIC (OBD) SYSTEM ....41
Introduction ..............................................................41
Two Trip Detection Logic .........................................41
Emission-related Diagnostic Information .................42
Malfunction Indicator Lamp (MIL) ............................55
OBD System Operation Chart .................................58
CONSULT-III Function (ENGINE) ...........................63
Generic Scan Tool (GST) Function .........................72
COMPONENT DIAGNOSIS .........................74
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE ...............................................................
74
Description ........................................................... ....74
Testing Condition .....................................................74
Inspection Procedure ...............................................74
Diagnosis Procedure ...............................................75
POWER SUPPLY AND GROUND CIRCUIT ....82
Diagnosis Procedure ...............................................82
Ground Inspection ...................................................85
U0101 CAN COMM CIRCUIT ...........................86
Description ...............................................................86
On Board Diagnosis Logic .......................................86
DTC Confirmation Procedure ..................................86
Diagnosis Procedure ...............................................86
U1001 CAN COMM CIRCUIT ...........................87
Description ...............................................................87
On Board Diagnosis Logic .......................................87
DTC Confirmation Procedure ..................................87
Diagnosis Procedure ...............................................87
P0011, P0021 IVT CONTROL ...........................88
On Board Diagnosis Logic .......................................88
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INFINITI QX56 2010 Factory Service Manual EC-2
DTC Confirmation Procedure .................................88
Diagnosis Procedure ..............................................89
Component Inspection ........................................

EC-2
DTC Confirmation Procedure .................................88
Diagnosis Procedure ..............................................89
Component Inspection ............................................93
P0031, P0032, P0051, P0052 A/F SENSOR 1
HEATER .............................................................
95
Description ........................................................... ...95
On Board Diagnosis Logic ......................................95
DTC Confirmation Procedure .................................95
Diagnosis Procedure ..............................................95
Component Inspection ............................................97
P0037, P0038, P0057, P0058 HO2S2 HEAT-
ER ......................................................................
98
Description ........................................................... ...98
On Board Diagnosis Logic ......................................98
DTC Confirmation Procedure .................................98
Diagnosis Procedure ..............................................99
Component Inspection ...........................................100
P0075, P0081 IVT CONTROL SOLENOID
VALVE .............................................................
101
Component Description ....................................... ..101
On Board Diagnosis Logic .....................................101
DTC Confirmation Procedure ................................101
Diagnosis Procedure .............................................101
Component Inspection ...........................................102
P0101 MAF SENSOR ......................................104
Component Description ....................................... ..104
On Board Diagnosis Logic .....................................104
DTC Confirmation Procedure ................................104
Overall Function Check .........................................105
Diagnosis Procedure .............................................106
Component Inspection ...........................................108
P0102, P0103 MAF SENSOR ..........................110
Component Description ....................................... ..110
On Board Diagnosis Logic .....................................110
DTC Confirmation Procedure ................................110
Diagnosis Procedure .............................................111
Component Inspection ...........................................112
P0112, P0113 IAT SENSOR ............................115
Component Description ....................................... ..115
On Board Diagnosis Logic .....................................115
DTC Confirmation Procedure ................................115
Diagnosis Procedure .............................................115
Component Inspection ...........................................117
P0116 ECT SENSOR .......................................118
Component Description ....................................... ..118
On Board Diagnosis Logic .....................................118
DTC Confirmation Procedure ................................118
Diagnosis Procedure .............................................119
Component Inspection ...........................................119
P0117, P0118 ECT SENSOR ..........................121
Component Description ....................................... ..121
On Board Diagnosis Logic .....................................121
DTC Confirmation Procedure ............................... .122
Diagnosis Procedure .............................................122
Component Inspection ..........................................123
P0122, P0123 TP SENSOR ..............................125
Component Description ........................................125
On Board Diagnosis Logic ....................................125
DTC Confirmation Procedure ................................125
Diagnosis Procedure .............................................125
Component Inspection ..........................................128
P0125 ECT SENSOR .......................................129
Component Description ........................................129
On Board Diagnosis Logic ....................................129
DTC Confirmation Procedure ................................129
Diagnosis Procedure .............................................130
Component Inspection ..........................................130
P0127 IAT SENSOR .........................................132
Component Description ........................................132
On Board Diagnosis Logic ....................................132
DTC Confirmation Procedure ................................132
Diagnosis Procedure .............................................133
Component Inspection ..........................................133
P0128 THERMOSTAT FUNCTION ..................135
On Board Diagnosis Logic ................................... .135
DTC Confirmation Procedure ................................135
Diagnosis Procedure .............................................135
Component Inspection ..........................................136
P0130, P0150 A/F SENSOR 1 .........................137
Component Description ....................................... .137
On Board Diagnosis Logic ....................................137
DTC Confirmation Procedure ................................137
Overall Function Check .........................................138
Diagnosis Procedure .............................................138
P0131, P0151 A/F SENSOR 1 .........................141
Component Description ....................................... .141
On Board Diagnosis Logic ....................................141
DTC Confirmation Procedure ................................141
Diagnosis Procedure .............................................142
P0132, P0152 A/F SENSOR 1 .........................145
Component Description ....................................... .145
On Board Diagnosis Logic ....................................145
DTC Confirmation Procedure ................................145
Diagnosis Procedure .............................................146
P0133, P0153 A/F SENSOR 1 .........................149
Component Description ....................................... .149
On Board Diagnosis Logic ....................................149
DTC Confirmation Procedure ................................149
Diagnosis Procedure .............................................150
P0137, P0157 HO2S2 .......................................155
Component Description ....................................... .155
On Board Diagnosis Logic ....................................155
DTC Confirmation Procedure ................................155
Overall Function Check .........................................156
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INFINITI QX56 2010 Factory Service Manual EC-3
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Diagnosis Procedure ...........................................
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156
Component Inspection ..........................................158
P0138, P0158 HO2S2 ...

EC-3
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Diagnosis Procedure ...........................................
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156
Component Inspection ..........................................158
P0138, P0158 HO2S2 ......................................160
Component Description ....................................... ..160
On Board Diagnosis Logic ....................................160
DTC Confirmation Procedure ................................160
Overall Function Check .........................................161
Diagnosis Procedure .............................................162
Component Inspection ..........................................165
P0139, P0159 HO2S2 ......................................167
Component Description ....................................... ..167
On Board Diagnosis Logic ....................................167
DTC Confirmation Procedure ................................167
Overall Function Check .........................................168
Diagnosis Procedure .............................................168
Component Inspection ..........................................170
P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION .......................................................
172
On Board Diagnosis Logic .................................. ..172
DTC Confirmation Procedure ................................172
Diagnosis Procedure .............................................173
P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION .......................................................
177
On Board Diagnosis Logic .................................. ..177
DTC Confirmation Procedure ................................177
Diagnosis Procedure .............................................178
P0181 FTT SENSOR ........................................182
Component Description ....................................... ..182
On Board Diagnosis Logic ....................................182
DTC Confirmation Procedure ................................182
Diagnosis Procedure .............................................183
Component Inspection ..........................................184
P0182, P0183 FTT SENSOR ...........................185
Component Description ....................................... ..185
On Board Diagnosis Logic ....................................185
DTC Confirmation Procedure ................................185
Diagnosis Procedure .............................................185
Component Inspection ..........................................187
P0222, P0223 APP SENSOR ...........................188
Component Description .........................................188
On Board Diagnosis Logic ....................................188
DTC Confirmation Procedure ................................188
Diagnosis Procedure .............................................188
Component Inspection ..........................................191
P0300, P0301, P0302, P0303, P0304, P0305,
P0306, P0307, P0308 MISFIRE .......................
192
On Board Diagnosis Logic .................................. ..192
DTC Confirmation Procedure ................................192
Diagnosis Procedure .............................................193
P0327, P0328, P0332, P0333 KS ....................198
Component Description ....................................... ..198
On Board Diagnosis Logic ....................................198
DTC Confirmation Procedure .............................. ..198
Diagnosis Procedure .............................................198
Component Inspection ...........................................200
P0335 CKP SENSOR (POS) ...........................201
Component Description .........................................201
On Board Diagnosis Logic .....................................201
DTC Confirmation Procedure ................................201
Diagnosis Procedure .............................................201
Component Inspection ...........................................203
P0340 CMP SENSOR (PHASE) .....................205
Component Description .........................................205
On Board Diagnosis Logic .....................................205
DTC Confirmation Procedure ................................205
Diagnosis Procedure .............................................206
Component Inspection ...........................................207
P0420, P0430 THREE WAY CATALYST
FUNCTION ......................................................
209
On Board Diagnosis Logic ................................... ..209
DTC Confirmation Procedure ................................209
Overall Function Check .........................................210
Diagnosis Procedure .............................................210
P0441 EVAP CONTROL SYSTEM .................213
System Description ................................................213
On Board Diagnosis Logic .....................................213
DTC Confirmation Procedure ................................213
Overall Function Check .........................................214
Diagnosis Procedure .............................................214
P0442 EVAP CONTROL SYSTEM .................218
On Board Diagnosis Logic .....................................218
DTC Confirmation Procedure ................................218
Diagnosis Procedure .............................................219
Component Inspection ...........................................224
P0443 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE ......................
225
Description .............................................................225
On Board Diagnosis Logic .....................................225
DTC Confirmation Procedure ................................226
Diagnosis Procedure .............................................227
Component Inspection ...........................................229
P0444, P0445 EVAP CANISTER PURGE
VOLUME CONTROL SOLENOID VALVE ......
231
Description .............................................................231
On Board Diagnosis Logic .....................................231
DTC Confirmation Procedure ................................232
Diagnosis Procedure .............................................232
Component Inspection ...........................................233
P0447 EVAP CANISTER VENT CONTROL
VALVE .............................................................
234
Component Description .........................................234
On Board Diagnosis Logic .....................................234
DTC Confirmation Procedure ................................234
Diagnosis Procedure .............................................234
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INFINITI QX56 2010 Factory Service Manual EC-4
Component Inspection ...........................................236
P0448 EVAP CANISTER VENT CONTROL
VALVE .............................................................
238
Component Description

EC-4
Component Inspection ...........................................236
P0448 EVAP CANISTER VENT CONTROL
VALVE .............................................................
238
Component Description ....................................... ..238
On Board Diagnosis Logic .....................................238
DTC Confirmation Procedure ................................238
Diagnosis Procedure .............................................239
Component Inspection ...........................................240
P0451 EVAP CONTROL SYSTEM PRES-
SURE SENSOR ...............................................
242
Component Description ....................................... ..242
On Board Diagnosis Logic .....................................242
DTC Confirmation Procedure ................................242
Diagnosis Procedure .............................................242
Component Inspection ...........................................243
P0452 EVAP CONTROL SYSTEM PRES-
SURE SENSOR ...............................................
245
Component Description ....................................... ..245
On Board Diagnosis Logic .....................................245
DTC Confirmation Procedure ................................245
Diagnosis Procedure .............................................246
Component Inspection ...........................................248
P0453 EVAP CONTROL SYSTEM PRES-
SURE SENSOR ...............................................
249
Component Description ....................................... ..249
On Board Diagnosis Logic .....................................249
DTC Confirmation Procedure ................................249
Diagnosis Procedure .............................................250
Component Inspection ...........................................253
P0455 EVAP CONTROL SYSTEM ..................254
On Board Diagnosis Logic ................................... ..254
DTC Confirmation Procedure ................................254
Diagnosis Procedure .............................................255
Component Inspection ...........................................260
P0456 EVAP CONTROL SYSTEM ..................261
On Board Diagnosis Logic ................................... ..261
DTC Confirmation Procedure ................................262
Overall Function Check .........................................262
Diagnosis Procedure .............................................263
Component Inspection ...........................................268
P0460 FUEL LEVEL SENSOR ........................269
Component Description ....................................... ..269
On Board Diagnosis Logic .....................................269
DTC Confirmation Procedure ................................269
Diagnosis Procedure .............................................269
P0461 FUEL LEVEL SENSOR ........................271
Component Description ....................................... ..271
On Board Diagnosis Logic .....................................271
Overall Function Check .........................................271
Diagnosis Procedure .............................................272
P0462, P0463 FUEL LEVEL SENSOR ...........273
Component Description ....................................... .273
On Board Diagnosis Logic ....................................273
DTC Confirmation Procedure ................................273
Diagnosis Procedure .............................................273
P0500 VSS ........................................................275
Description ........................................................... .275
On Board Diagnosis Logic ....................................275
DTC Confirmation Procedure ................................275
Overall Function Check .........................................276
Diagnosis Procedure .............................................276
P0506 ISC SYSTEM .........................................277
Description ........................................................... .277
On Board Diagnosis Logic ....................................277
DTC Confirmation Procedure ................................277
Diagnosis Procedure .............................................277
P0507 ISC SYSTEM .........................................279
Description ........................................................... .279
On Board Diagnosis Logic ....................................279
DTC Confirmation Procedure ................................279
Diagnosis Procedure .............................................279
P0550 PSP SENSOR .......................................281
Component Description ....................................... .281
On Board Diagnosis Logic ....................................281
DTC Confirmation Procedure ................................281
Diagnosis Procedure .............................................281
Component Inspection ..........................................283
P0603 ECM POWER SUPPLY .........................284
Component Description ....................................... .284
On Board Diagnosis Logic ....................................284
DTC Confirmation Procedure ................................284
Diagnosis Procedure .............................................284
P0605 ECM .......................................................286
Component Description ....................................... .286
On Board Diagnosis Logic ....................................286
DTC Confirmation Procedure ................................286
Diagnosis Procedure .............................................287
P0607 ECM .......................................................288
Description ........................................................... .288
On Board Diagnosis Logic ....................................288
DTC Confirmation Procedure ................................288
Diagnosis Procedure .............................................288
P0643 SENSOR POWER SUPPLY ..................289
On Board Diagnosis Logic ....................................289
DTC Confirmation Procedure ................................289
Diagnosis Procedure .............................................289
P0850 PNP SWITCH ........................................292
Component Description ........................................292
On Board Diagnosis Logic ....................................292
DTC Confirmation Procedure ................................292
Overall Function Check .........................................292
Diagnosis Procedure .............................................293
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INFINITI QX56 2010 Factory Service Manual EC-5
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P1140, P1145 IVT CONTROL POSITION
SENSOR ......................................................... ..
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Component Description ..................................

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P1140, P1145 IVT CONTROL POSITION
SENSOR ......................................................... ..
295
Component Description ....................................... ..295
On Board Diagnosis Logic ....................................295
DTC Confirmation Procedure ................................295
Diagnosis Procedure .............................................295
Component Inspection ..........................................298
P1148, P1168 CLOSED LOOP CONTROL .....299
On Board Diagnosis Logic .................................. ..299
P1211 TCS CONTROL UNIT ...........................300
Description .......................................................... ..300
On Board Diagnosis Logic ....................................300
DTC Confirmation Procedure ................................300
Diagnosis Procedure .............................................300
P1212 TCS COMMUNICATION LINE ..............301
Description .......................................................... ..301
On Board Diagnosis Logic ....................................301
DTC Confirmation Procedure ................................301
Diagnosis Procedure .............................................301
P1217 ENGINE OVER TEMPERATURE .........302
On Board Diagnosis Logic .................................. ..302
Overall Function Check .........................................302
Diagnosis Procedure .............................................303
Main 13 Causes of Overheating ............................304
P1225 TP SENSOR ..........................................306
Component Description ....................................... ..306
On Board Diagnosis Logic ....................................306
DTC Confirmation Procedure ................................306
Diagnosis Procedure .............................................306
P1226 TP SENSOR ..........................................308
Component Description ....................................... ..308
On Board Diagnosis Logic ....................................308
DTC Confirmation Procedure ................................308
Diagnosis Procedure .............................................308
P1421 COLD START CONTROL .....................310
Description .......................................................... ..310
On Board Diagnosis Logic ....................................310
DTC Confirmation Procedure ................................310
Diagnosis Procedure .............................................310
P1550 BATTERY CURRENT SENSOR ...........312
Component Description ....................................... ..312
On Board Diagnosis Logic ....................................312
DTC Confirmation Procedure ................................312
Diagnosis Procedure .............................................312
Component Inspection ..........................................314
P1551, P1552 BATTERY CURRENT SEN-
SOR ..................................................................
316
Component Description ....................................... ..316
On Board Diagnosis Logic ....................................316
DTC Confirmation Procedure ................................316
Diagnosis Procedure .............................................316
Component Inspection ..........................................318
P1553 BATTERY CURRENT SENSOR ..........320
Component Description ....................................... ..320
On Board Diagnosis Logic .....................................320
DTC Confirmation Procedure ................................320
Diagnosis Procedure .............................................320
Component Inspection ...........................................322
P1554 BATTERY CURRENT SENSOR ..........324
Component Description .........................................324
On Board Diagnosis Logic .....................................324
Overall Function Check .........................................324
Diagnosis Procedure .............................................325
Component Inspection ...........................................326
P1564 ICC STEERING SWITCH .....................328
Component Description .........................................328
On Board Diagnosis Logic .....................................328
DTC Confirmation Procedure ................................328
Diagnosis Procedure .............................................328
Component Inspection ...........................................330
P1564 ASCD STEERING SWITCH .................332
Component Description .........................................332
On Board Diagnosis Logic .....................................332
DTC Confirmation Procedure ................................332
Diagnosis Procedure .............................................332
Component Inspection ...........................................334
P1568 ICC FUNCTION ....................................336
On Board Diagnosis Logic .....................................336
DTC Confirmation Procedure ................................336
Diagnosis Procedure .............................................336
P1572 ICC BRAKE SWITCH ..........................337
Component Description .........................................337
On Board Diagnosis Logic .....................................337
DTC Confirmation Procedure ................................337
Diagnosis Procedure .............................................338
Component Inspection ...........................................343
P1572 ASCD BRAKE SWITCH ......................344
Component Description .........................................344
On Board Diagnosis Logic .....................................344
DTC Confirmation Procedure ................................344
Diagnosis Procedure .............................................345
Component Inspection ...........................................348
P1574 ICC VEHICLE SPEED SENSOR .........349
Component Description .........................................349
On Board Diagnosis Logic .....................................349
DTC Confirmation Procedure ................................349
Diagnosis Procedure .............................................349
P1574 ASCD VEHICLE SPEED SENSOR .....351
Component Description .........................................351
On Board Diagnosis Logic .....................................351
DTC Confirmation Procedure ................................351
Diagnosis Procedure .............................................351
P1805 BRAKE SWITCH .................................353
Description .............................................................353
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INFINITI QX56 2010 Factory Service Manual EC-6
On Board Diagnosis Logic .....................................353
DTC Confirmation Procedure ................................353
Diagnosis Procedure ...........................................

EC-6
On Board Diagnosis Logic .....................................353
DTC Confirmation Procedure ................................353
Diagnosis Procedure .............................................353
Component Inspection ...........................................355
P2100, P2103 THROTTLE CONTROL MO-
TOR RELAY .....................................................
356
Component Description ....................................... ..356
On Board Diagnosis Logic .....................................356
DTC Confirmation Procedure ................................356
Diagnosis Procedure .............................................356
P2101 ELECTRIC THROTTLE CONTROL
FUNCTION .......................................................
359
Description ........................................................... ..359
On Board Diagnosis Logic .....................................359
DTC Confirmation Procedure ................................359
Diagnosis Procedure .............................................359
Component Inspection ...........................................362
P2118 THROTTLE CONTROL MOTOR ..........363
Component Description ....................................... ..363
On Board Diagnosis Logic .....................................363
DTC Confirmation Procedure ................................363
Diagnosis Procedure .............................................363
Component Inspection ...........................................364
P2119 ELECTRIC THROTTLE CONTROL
ACTUATOR .....................................................
365
Component Description ....................................... ..365
On Board Diagnosis Logic .....................................365
DTC Confirmation Procedure ................................365
Diagnosis Procedure .............................................366
P2122, P2123 APP SENSOR ..........................367
Component Description ....................................... ..367
On Board Diagnosis Logic .....................................367
DTC Confirmation Procedure ................................367
Diagnosis Procedure .............................................367
Component Inspection ...........................................369
P2127, P2128 APP SENSOR ..........................370
Component Description ....................................... ..370
On Board Diagnosis Logic .....................................370
DTC Confirmation Procedure ................................370
Diagnosis Procedure .............................................370
Component Inspection ...........................................373
P2135 TP SENSOR .........................................374
Component Description ....................................... ..374
On Board Diagnosis Logic .....................................374
DTC Confirmation Procedure ................................374
Diagnosis Procedure .............................................374
Component Inspection ...........................................377
P2138 APP SENSOR ......................................378
Component Description ....................................... ..378
On Board Diagnosis Logic .....................................378
DTC Confirmation Procedure ................................378
Diagnosis Procedure .............................................379
Component Inspection ......................................... .381
P2A00, P2A03 A/F SENSOR 1 ........................382
Component Description ....................................... .382
On Board Diagnosis Logic ....................................382
DTC Confirmation Procedure ................................382
Diagnosis Procedure .............................................383
ASCD BRAKE SWITCH ...................................388
Component Description ....................................... .388
Diagnosis Procedure .............................................388
Component Inspection ..........................................390
ASCD INDICATOR ...........................................391
Component Description ....................................... .391
Diagnosis Procedure .............................................391
COOLING FAN .................................................392
Diagnosis Procedure ............................................ .392
Component Inspection ..........................................392
ELECTRICAL LOAD SIGNAL ..........................394
Description ........................................................... .394
Diagnosis Procedure .............................................394
FUEL INJECTOR ..............................................396
Component Description ....................................... .396
Diagnosis Procedure .............................................396
Component Inspection ..........................................398
FUEL PUMP .....................................................399
Description ........................................................... .399
Diagnosis Procedure .............................................399
Component Inspection ..........................................402
ICC BRAKE SWITCH ..................................... ..403
Component Description ....................................... .403
Diagnosis Procedure .............................................403
Component Inspection ..........................................405
IGNITION SIGNAL ............................................407
Component Description ....................................... .407
Diagnosis Procedure .............................................407
Component Inspection ..........................................410
ON BOARD REFUELING VAPOR RECOV-
ERY (ORVR) .....................................................
412
System Description .............................................. .412
Diagnosis Procedure .............................................412
Component Inspection ..........................................414
POSITIVE CRANKCASE VENTILATION .........417
Description ........................................................... .417
Component Inspection ..........................................417
REFRIGERANT PRESSURE SENSOR ...........419
Component Description ....................................... .419
Diagnosis Procedure .............................................419
ECU DIAGNOSIS ......................................422
ECM ................................................................ ..422
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INFINITI QX56 2010 Factory Service Manual EC-7
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CONSULT-lll Reference Va
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Mode ................................................................... ..
422
ECM Harness Connector Terminal Layout

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CONSULT-lll Reference Va
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Mode ................................................................... ..
422
ECM Harness Connector Terminal Layout ...........425
ECM Terminal and Reference Value ....................425
Wiring Diagram - ENGINE CONTROL SYSTEM - ..435
Fail-Safe Chart .................................................... ..456
DTC Inspection Priority Chart ............................. ..458
DTC Index ........................................................... ..459
Emission-related Diagnostic Information ...............463
SYMPTOM DIAGNOSIS ..... .......................477
ENGINE CONTROL SYSTEM SYMPTOMS .. ..477
Symptom Matrix Chart ........................................ ..477
NORMAL OPERATING CONDITION ...............481
Fuel Cut Control (at No Load and High Engine
Speed) ................................................................. ..
481
PRECAUTION ............................................482
PRECAUTIONS .............................................. ..482
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
482
On Board Diagnosis (OBD) System of Engine and
A/T .........................................................................
482
Precaution .............................................................482
PREPARATION .........................................486
PREPARATION .............................................. ..486
Special Service Tool ........................................... ..486
Commercial Service Tool ......................................487
ON-VEHICLE MAINTENANCE ..................489
FUEL PRESSURE ...........................................489
Fuel Pressure Check ........................................... ..489
EVAP LEAK CHECK ......................................491
How to Detect Fuel Vapor Leakage .......................491
ON-VEHICLE REPAIR ...............................493
EVAP CANISTER ............................................493
Removal and Installation ..................................... ..493
Component Inspection ...........................................493
INTAKE VALVE TIMING CONTROL ..............494
Intake Valve Timing Control Solenoid Valve (LH) ..494
Intake Valve Timing Cont rol Solenoid Valve (RH) ..494
Intake Valve Timing Control Position Sensor (LH) ..495
Intake Valve Timing Control Position Sensor (RH) ..495
Camshaft Position Sensor (PHASE) .....................495
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... .
497
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
497
Fuel Pressure ...................................................... ..497
Idle Speed and Ignition Timing ..............................497
Calculated Load Value ..........................................497
Mass Air Flow Sensor ............................................497
Intake Air Temperature Sensor .............................497
Engine Coolant Temperature Sensor ....................497
A/F Sensor 1 Heater ..............................................497
Heated Oxygen sensor 2 Heater ...........................498
Crankshaft Position Sensor (POS) ........................498
Camshaft Position Sensor (PHASE) .....................498
Throttle Control Motor ............................................498
Fuel Injector ...........................................................498
Fuel Pump .............................................................498
Revision: April 20092010 QX56

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