wiring diagram INFINITI QX56 2004 Factory Workshop Manual

DI-46
WARNING CHIME
Revision: August 20072004 QX56
Wiring Diagram — CHIME —EKS007EH
WKWA3063E

WARNING CHIME
DI-49
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Revision: August 20072004 QX56
Terminals and Reference Value for Combination MeterEKS007EJ
How to Proceed With Trouble DiagnosisEKS007EK
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to DI-44, "
System Description" .
3. Perform the preliminary check. Refer to DI-49, "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the warning chime operate properly? If so, go to 6. If not, go to 3.
6. Inspection End.
Preliminary CheckEKS007EL
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSE AND FUSIBLE LINK
Check for blown BCM fuse or fusible link.
Refer to DI-46, "Wiring Diagram — CHIME —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
35 O/B Combination switch output 2
ON

Light switch and wiper switch
OFF

Wiper dial position 4 36 R/W Combination switch output 1
37 B/R Key switch signal OFFKey is removed 0
Key is inserted Battery voltage
38 W/L Ignition switch ON or START ON — Battery voltage
39 W CAN-H — — —
40 R CAN-L — — —
47 SB Front door switch LH signal OFFON (open) 0
OFF (closed) 5
67 B Ground OFF — 0
70 W/B Battery power supply OFF — Battery voltage Te r m i n a l
No.Wire
colorItem Condition
Reference value (V)
(Approx.) Ignition
switchMeasurement method
SKIA5292E
Te r m i n a l
No.Wire
colorItem Condition
Reference value (V)
(Approx.) Ignition
switchMeasurement method
11 W C A N - H — — —
12 R CAN-L — — —
27 O/B Seat belt buckle switch LH ONUnfastened (ON) 0
Fastened (OFF) Battery voltage
Unit Power source Fuse or fusible link No.
BCMBatteryf
Ignition switch ON or START 59

DI-54
WARNING CHIME
Revision: August 20072004 QX56
2. CHECK FRONT DOOR SWITCH LH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and front door switch LH connector.
3. Check continuity between BCM harness connector M19 terminal
47 (SB) and front door switch LH harness connector B8 terminal
2 (SB).
4. Check continuity between BCM harness connector M19 terminal
47 (SB) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK FRONT DOOR SWITCH LH
Check continuity between front door switch LH terminal 2 and
exposed metal of switch while pressing and releasing switch.
OK or NG
OK >> Replace the BCM. Refer to BCS-19, "Removal and
Installation of BCM" .
NG >> Replace the front door switch LH.
Key Warning Chime Does Not OperateEKS007EP
1. CHECK FUSE
Check if the key switch fuse [No. 19, located in the fuse block (J/B)] is blown. Refer to DI-46, "
Wiring Diagram
— CHIME —" .
Is the fuse blown?
YES >> Replace the fuse. Be sure to repair the cause of malfunction before installing new fuse.
NO >> GO TO 2.
2. CHECK WARNING CHIME OPERATION
With key removed from the ignition key cylinder and the front door LH open, turn the lighting switch to 1st or
2nd position.
Does warning chime sound?
YES >> GO TO 3.
NO >> Go to DI-53, "
All Warning Chimes Do Not Operate" or DI-53, "Key Warning Chime and Light
Warning Chime Do Not Operate (Seat Belt Warning Chime Does Operate)" . Continuity should exist.
Continuity should not exist.
WKIA1516E
When front door switch
LH is released: Continuity should exist.
When front door switch
LH is pressed: Continuity should not
exist.
WKIA2023E

DI-62
REAR SONAR SYSTEM
Revision: August 20072004 QX56
Wiring Diagram — SONAR —EKS007EU
WKWA3065E

REAR SONAR SYSTEM
DI-67
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Revision: August 20072004 QX56
Preliminary CheckEKS007EZ
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES

Check for blown rear sonar system fuses.
Refer to DI-62, "
Wiring Diagram — SONAR —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect sonar control unit connector.
2. Check voltage between sonar control unit connector B56 termi-
nal 8 (G/R) and ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between sonar control unit and fuse.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between sonar control unit B56 terminal 6 and
ground.
OK or NG
OK >> Inspection End.
NG >> Check harness ground circuit.
Unit Power Source Fuse
Sonar control unit ON or START 12
Terminals Ignition switch position
(+)
(-) ON or START
ConnectorTe r m i n a l
(Wire color)
B56 8 (G/R) Ground Battery voltage
WKIA1145E
Te r m i n a l s
Continuity (+)
(–)
ConnectorTe r m i n a l
(Wire color)
B56 6 (B) Ground Yes
WKIA1146E

DI-70
CLOCK
Revision: August 20072004 QX56
CLOCKPFP:25820
Wiring Diagram — CLOCK —EKS007R2
WKWA1178E

REAR VIEW MONITOR
DI-75
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Revision: August 20072004 QX56
Wiring Diagram — R/VIEW —EKS007R7
WKWA1180E

EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
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SECTION EC
A
EC
Revision: August 20072004 QX56 INDEX FOR DTC ........................................................ 8
Alphabetical Index .................................................... 8
DTC No. Index ....................................................... 12
PRECAUTIONS ........................................................ 16
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................ 16
On Board Diagnostic (OBD) System of Engine and
A/T .......................................................................... 16
Precaution .............................................................. 16
Wiring Diagrams and Trouble Diagnosis ................ 19
PREPARATION ......................................................... 20
Special Service Tools ............................................. 20
Commercial Service Tools ...................................... 22
ENGINE CONTROL SYSTEM .................................. 23
System Diagram ..................................................... 23
Vacuum Hose Drawing ........................................... 24
System Chart ......................................................... 25
Multiport Fuel Injection (MFI) System .................... 26
Electronic Ignition (EI) System ............................... 28
Nissan Torque Demand (NTD) Control System ..... 29
Air Conditioning Cut Control ................................... 30
Fuel Cut Control (at No Load and High Engine
Speed) .................................................................... 30
CAN communication .............................................. 31
BASIC SERVICE PROCEDURE .............................. 32
Idle Speed and Ignition Timing Check .................... 32
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment ............................................................. 33
Accelerator Pedal Released Position Learning ...... 44
Throttle Valve Closed Position Learning ................ 44
Idle Air Volume Learning ........................................ 44
Fuel Pressure Check .............................................. 46
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 49
Introduction ............................................................ 49
Two Trip Detection Logic ........................................ 49
Emission-related Diagnostic Information ................ 50
IVIS (Infiniti Vehicle Immobilizer System — NATS) ... 63
Malfunction Indicator Lamp (MIL) ........................... 63
OBD System Operation Chart ................................ 66TROUBLE DIAGNOSIS ............................................ 71
Trouble Diagnosis Introduction ............................... 71
DTC Inspection Priority Chart ................................. 76
Fail-safe Chart ........................................................ 77
Basic Inspection ..................................................... 79
Symptom Matrix Chart ............................................ 84
Engine Control Component Parts Location ............ 88
Circuit Diagram ....................................................... 94
ECM Harness Connector Terminal Layout ............. 96
ECM Terminals and Reference Value ..................... 96
CONSULT-II Function ...........................................103
Generic Scan Tool (GST) Function .......................116
CONSULT-II Reference Value in Data Monitor .....118
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................121
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .123
Description ............................................................123
Testing Condition ..................................................123
Inspection Procedure ............................................123
Diagnostic Procedure ...........................................124
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................127
Description ............................................................127
Diagnostic Procedure ...........................................127
POWER SUPPLY AND GROUND CIRCUIT ...........128
Wiring Diagram .....................................................128
Diagnostic Procedure ...........................................129
Ground Inspection ................................................133
DTC U1000, U1001 CAN COMMUNICATION LINE .135
Description ............................................................135
On Board Diagnosis Logic ....................................135
DTC Confirmation Procedure ...............................135
Wiring Diagram .....................................................136
Diagnostic Procedure ...........................................137
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .138
Description ............................................................138
CONSULT-II Reference Value in Data Monitor Mode
.138
On Board Diagnosis Logic ....................................138
DTC Confirmation Procedure ...............................139

EC-2Revision: August 20072004 QX56 Wiring Diagram .....................................................140
Diagnostic Procedure ...........................................143
Component Inspection ..........................................145
Removal and Installation ......................................145
DTC P0101 MAF SENSOR .....................................146
Component Description ........................................146
CONSULT-II Reference Value in Data Monitor Mode
.146
On Board Diagnosis Logic ....................................146
DTC Confirmation Procedure ...............................147
Overall Function Check ........................................148
Wiring Diagram .....................................................149
Diagnostic Procedure ...........................................150
Component Inspection ..........................................153
Removal and Installation ......................................153
DTC P0102, P0103 MAF SENSOR .........................154
Component Description ........................................154
CONSULT-II Reference Value in Data Monitor Mode
.154
On Board Diagnosis Logic ....................................154
DTC Confirmation Procedure ...............................155
Wiring Diagram .....................................................156
Diagnostic Procedure ...........................................157
Component Inspection ..........................................160
Removal and Installation ......................................160
DTC P0112, P0113 IAT SENSOR ...........................161
Component Description ........................................161
On Board Diagnosis Logic ....................................161
DTC Confirmation Procedure ...............................161
Wiring Diagram .....................................................162
Diagnostic Procedure ...........................................163
Component Inspection ..........................................164
Removal and Installation ......................................164
DTC P0117, P0118 ECT SENSOR ..........................165
Component Description ........................................165
On Board Diagnosis Logic ....................................165
DTC Confirmation Procedure ...............................166
Wiring Diagram .....................................................167
Diagnostic Procedure ...........................................168
Component Inspection ..........................................169
Removal and Installation ......................................170
DTC P0122, P0123 TP SENSOR ............................171
Component Description ........................................171
CONSULT-II Reference Value in Data Monitor Mode
.171
On Board Diagnosis Logic ....................................171
DTC Confirmation Procedure ...............................172
Wiring Diagram .....................................................173
Diagnostic Procedure ...........................................174
Component Inspection ..........................................177
Removal and Installation ......................................177
DTC P0125 ECT SENSOR ......................................178
Component Description ........................................178
On Board Diagnosis Logic ....................................178
DTC Confirmation Procedure ...............................179
Diagnostic Procedure ...........................................179
Component Inspection ..........................................180
Removal and Installation ......................................180
DTC P0127 IAT SENSOR .......................................181Component Description ........................................ 181
On Board Diagnosis Logic .................................... 181
DTC Confirmation Procedure ................................ 181
Diagnostic Procedure ............................................ 182
Component Inspection .......................................... 183
Removal and Installation ....................................... 183
DTC P0128 THERMOSTAT FUNCTION ................. 184
On Board Diagnosis Logic .................................... 184
DTC Confirmation Procedure ................................ 184
Diagnostic Procedure ............................................ 184
Component Inspection .......................................... 184
Removal and Installation ....................................... 185
DTC P0138, P0158 HO2S2 ..................................... 186
Component Description ........................................ 186
CONSULT-II Reference Value in Data Monitor Mode
. 186
On Board Diagnosis Logic .................................... 186
DTC Confirmation Procedure ................................ 187
Wiring Diagram ..................................................... 188
Diagnostic Procedure ............................................ 191
Component Inspection .......................................... 194
Removal and Installation ....................................... 195
DTC P0139, P0159 HO2S2 ..................................... 196
Component Description ........................................ 196
CONSULT-II Reference Value in Data Monitor Mode
. 196
On Board Diagnosis Logic .................................... 196
DTC Confirmation Procedure ................................ 197
Overall Function Check ......................................... 197
Wiring Diagram ..................................................... 199
Diagnostic Procedure ............................................ 202
Component Inspection .......................................... 205
Removal and Installation ....................................... 207
DTC P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION .............................................................. 208
On Board Diagnosis Logic .................................... 208
DTC Confirmation Procedure ................................ 208
Wiring Diagram ..................................................... 210
Diagnostic Procedure ............................................ 212
DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION .............................................................. 217
On Board Diagnosis Logic .................................... 217
DTC Confirmation Procedure ................................ 217
Wiring Diagram ..................................................... 219
Diagnostic Procedure ............................................ 221
DTC P0181 FTT SENSOR ...................................... 225
Component Description ........................................ 225
On Board Diagnosis Logic .................................... 225
DTC Confirmation Procedure ................................ 225
Wiring Diagram ..................................................... 227
Diagnostic Procedure ............................................ 228
Component Inspection .......................................... 229
Removal and Installation ....................................... 230
DTC P0182, P0183 FTT SENSOR .......................... 231
Component Description ........................................ 231
On Board Diagnosis Logic .................................... 231
DTC Confirmation Procedure ................................ 231
Wiring Diagram ..................................................... 232
Diagnostic Procedure ............................................ 233

EC-3
C
D
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F
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ECA
Revision: August 20072004 QX56 Component Inspection ......................................... 234
Removal and Installation ...................................... 235
DTC P0222, P0223 TP SENSOR ........................... 236
Component Description ........................................ 236
CONSULT-II Reference Value in Data Monitor Mode
. 236
On Board Diagnosis Logic ................................... 236
DTC Confirmation Procedure ............................... 237
Wiring Diagram .................................................... 238
Diagnostic Procedure ........................................... 239
Component Inspection ......................................... 242
Removal and Installation ...................................... 242
DTC P0300 - P0308 MULTIPLE CYLINDER MIS-
FIRE, NO. 1 - 8 CYLINDER MISFIRE ..................... 243
On Board Diagnosis Logic ................................... 243
DTC Confirmation Procedure ............................... 243
Diagnostic Procedure ........................................... 244
DTC P0327, P0328, P0332, P0333 KS .................. 250
Component Description ........................................ 250
On Board Diagnosis Logic ................................... 250
DTC Confirmation Procedure ............................... 250
Wiring Diagram .................................................... 251
Diagnostic Procedure ........................................... 252
Component Inspection ......................................... 254
Removal and Installation ...................................... 254
DTC P0335 CKP SENSOR (POS) .......................... 255
Component Description ........................................ 255
CONSULT-II Reference Value in Data Monitor Mode
. 255
On Board Diagnosis Logic ................................... 255
DTC Confirmation Procedure ............................... 255
Wiring Diagram .................................................... 256
Diagnostic Procedure ........................................... 257
Component Inspection ......................................... 260
Removal and Installation ...................................... 260
DTC P0340 CAMSHAFT POSITION (CMP) SEN-
SOR (PHASE) ......................................................... 261
Component Description ........................................ 261
On Board Diagnosis Logic ................................... 261
DTC Confirmation Procedure ............................... 261
Wiring Diagram .................................................... 262
Diagnostic Procedure ........................................... 263
Component Inspection ......................................... 266
Removal and Installation ...................................... 266
DTC P0420, P0430 THREE WAY CATALYST FUNC-
TION ........................................................................ 267
On Board Diagnosis Logic ................................... 267
DTC Confirmation Procedure ............................... 267
Overall Function Check ........................................ 268
Diagnostic Procedure ........................................... 269
DTC P0441 EVAP CONTROL SYSTEM ................ 271
System Description .............................................. 271
On Board Diagnosis Logic ................................... 271
DTC Confirmation Procedure ............................... 271
Overall Function Check ........................................ 272
Diagnostic Procedure ........................................... 273
DTC P0442 EVAP CONTROL SYSTEM ................ 276
On Board Diagnosis Logic ................................... 276DTC Confirmation Procedure ...............................277
Diagnostic Procedure ...........................................278
DTC P0444, P0445 EVAP CANISTER PURGE VOL-
UME CONTROL SOLENOID VALVE ......................285
Description ............................................................285
CONSULT-II Reference Value in Data Monitor Mode
.285
On Board Diagnosis Logic ....................................286
DTC Confirmation Procedure ...............................286
Wiring Diagram .....................................................287
Diagnostic Procedure ...........................................289
Component Inspection ..........................................290
Removal and Installation ......................................291
DTC P0447 EVAP CANISTER VENT CONTROL
VALVE .....................................................................292
Component Description ........................................292
CONSULT-II Reference Value in Data Monitor Mode
.292
On Board Diagnosis Logic ....................................292
DTC Confirmation Procedure ...............................293
Wiring Diagram .....................................................294
Diagnostic Procedure ...........................................295
Component Inspection ..........................................297
DTC P0451 EVAP CONTROL SYSTEM PRESSURE
SENSOR .................................................................299
Component Description ........................................299
CONSULT-II Reference Value in Data Monitor Mode
.299
On Board Diagnosis Logic ....................................299
DTC Confirmation Procedure ...............................300
Diagnostic Procedure ...........................................300
Component Inspection ..........................................301
DTC P0452 EVAP CONTROL SYSTEM PRESSURE
SENSOR .................................................................302
Component Description ........................................302
CONSULT-II Reference Value in Data Monitor Mode
.302
On Board Diagnosis Logic ....................................302
DTC Confirmation Procedure ...............................303
Wiring Diagram .....................................................304
Diagnostic Procedure ...........................................305
Component Inspection ..........................................307
DTC P0453 EVAP CONTROL SYSTEM PRESSURE
SENSOR .................................................................308
Component Description ........................................308
CONSULT-II Reference Value in Data Monitor Mode
.308
On Board Diagnosis Logic ....................................308
DTC Confirmation Procedure ...............................309
Wiring Diagram .....................................................310
Diagnostic Procedure ...........................................311
Component Inspection ..........................................315
DTC P0455 EVAP CONTROL SYSTEM .................316
On Board Diagnosis Logic ....................................316
DTC Confirmation Procedure ...............................317
Diagnostic Procedure ...........................................318
DTC P0456 EVAP CONTROL SYSTEM .................324
On Board Diagnosis Logic ....................................324
DTC Confirmation Procedure ...............................325