2008 INFINITI QX56 wiring diagram

BRC-3
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BRC
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C1185 ICC UNIT .................................................78
Description .......................................................... ....78
DTC Logic ...............................................................78
Diagnosis Procedure ...............................................78
Special Repair Requirement ...................................79
U1000 CAN COMM CIRCUIT .............................80
Description .......................................................... ....80
DTC Logic ...............................................................80
Diagnosis Procedure ...............................................80
Special Repair Requirement ...................................80
VDC OFF SWITCH ......................................... ....81
Description .......................................................... ....81
Component Function Check ....................................81
Diagnosis Procedure ...............................................81
Component Inspection ............................................82
ABS WARNING LAMP ................................... ....83
Description .......................................................... ....83
Component Function Check ....................................83
Diagnosis Procedure ...............................................83
BRAKE WARNING LAMP ............................. ....84
Description .......................................................... ....84
Component Function Check ....................................84
Diagnosis Procedure ...............................................84
VDC OFF INDICATOR LAMP ............................85
Description .......................................................... ....85
Component Function Check ....................................85
Diagnosis Procedure ...............................................85
SLIP INDICATOR LAMP ....................................86
Description .......................................................... ....86
Component Function Check ....................................86
Diagnosis Procedure ...............................................86
ECU DIAGNOSIS .........................................87
ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT) .......................................... ....
87
Reference Value ................................................. ....87
Wiring Diagram .......................................................92
Fail-Safe ..................................................................99
DTC No. Index ......................................................100
SYMPTOM DIAGNOSIS ............................102
VDC/TCS/ABS ................................................ ..102
Symptom Table ................................................... ..102
EXCESSIVE ABS FUNCTION OPERATION
FREQUENCY ...................................................
103
Diagnosis Procedure ........................................... ..103
UNEXPECTED PEDAL REACTION ...............104
Diagnosis Procedure ........................................... ..104
THE BRAKING DISTANCE IS LONG .............105
Diagnosis Procedure .............................................105
ABS FUNCTION DOES NOT OPERATE .......106
Diagnosis Procedure .............................................106
PEDAL VIBRATION OR ABS OPERATION
SOUND OCCURS ...........................................
107
Diagnosis Procedure ........................................... ..107
VEHICLE JERKS DURING VDC/TCS/ABS
CONTROL .......................................................
108
Diagnosis Procedure .............................................108
NORMAL OPERATING CONDITION .............109
Description .............................................................109
PRECAUTION ............................................110
PRECAUTIONS ...............................................110
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
110
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
110
Precaution for Brake System .................................111
Precaution for Brake Control .................................111
Precaution for CAN System ...................................112
PREPARATION .........................................113
PREPARATION ...............................................113
Special Service Tool ............................................ ..113
Commercial Service Tool ......................................113
REMOVAL AND INSTALLATION .............114
WHEEL SENSORS .........................................114
Removal and Installation ..................................... ..114
SENSOR ROTOR ............................................115
Removal and Installation .......................................115
ACTUATOR AND ELECTRIC UNIT (ASSEM-
BLY) ................................................................
116
Removal and Installation .......................................116
STEERING ANGLE SENSOR .........................118
Removal and Installation .......................................118
G SENSOR ......................................................119
Removal and Installation .......................................119
Revision: March 2010 2008 QX56

BRC-92
< ECU DIAGNOSIS >[VDC/TCS/ABS]
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Wiring Diagram
INFOID:0000000001686371
ABFWA0155GB
Revision: March 2010 2008 QX56

CCS-2
DTC 98 GEAR POSITION .................................40
DTC 98 GEAR POSITION ................................... ...40
DTC 102 LASER STAIN ....................................41
DTC 102 LASER STAIN ...................................... ...41
DTC 103 LASER SENSOR FAIL .......................42
DTC 103 LASER SENSOR FAIL ......................... ...42
DTC 104 LASER AIMING INCMP .....................43
DTC 104 LASER AIMING INCMP ....................... ...43
DTC 107 LASER COMM FAIL ..........................44
DTC 107 LASER COMM FAIL ............................ ...44
DTC109 LASER HIGH TEMP ............................45
DTC 109 LASER HIGH TEMP ............................ ...45
ECU DIAGNOSIS ..................................... ...46
ICC UNIT ............................................................46
Terminal and Reference Va lue for ICC Unit ...........46
Wiring Diagram .................................................... ...47
Fail Safe .................................................................54
Diagnostic Trouble Code (DTC) Chart ....................55
SYMPTOM DIAGNOSIS .............................57
INTELLIGENT CRUISE CONTROL SYSTEM
SYMPTOMS .................................................... ...
57
Symptom Chart .................................................... ...57
MAIN SWITCH DOES NOT TURN ON, MAIN
SWITCH DOES NOT TURN OFF ......................
58
Diagnosis Procedure ........................................... ...58
ICC SYSTEM CANNOT BE SET (MAIN
SWITCH TURNS ON/OFF) ................................
59
Diagnosis Procedure ........................................... ...59
ICC STEERING SWITCH (OTHER THAN
MAIN SWITCH) DOES NOT FUNCTION ..........
60
Diagnosis Procedure ........................................... ...60
ICC SYSTEM DOES NOT CANCEL WHEN A/
T SELECTOR LEVER SETS ON "N" ................
61
Diagnosis Procedure ............................................ ...61
CHIME DOES NOT SOUND ..............................62
Diagnosis Procedure ............................................ ...62
DRIVING FORCE IS HUNTING .........................63
Diagnosis Procedure ............................................ ...63
ICC SYSTEM FREQUENTLY CANNOT DE-
TECT THE VEHICLE AHEAD/ DETECTION
ZONE IS SHORT ...............................................
64
Diagnosis Procedure ...............................................64
THE SYSTEM DOES NOT DETECT THE VE-
HICLE AHEAD AT ALL .....................................
65
Diagnosis Procedure ............................................ ...65
NORMAL OPERATING CONDITION ................66
Description ........................................................... ...66
PRECAUTION ............................................68
PRECAUTIONS .............................................. ...68
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
68
ICC System Service ................................................68
PREPARATION ..........................................69
PREPARATION .............................................. ...69
Special Service Tool ............................................ ...69
ON-VEHICLE REPAIR ...............................70
ICC C/U ..............................................................70
ICC Unit ............................................................... ...70
ICC SENSOR INTEGRATED UNIT ...................71
ICC Sensor .......................................................... ...71
ICC STEERING SWITCH ..................................72
Removal and Installation .........................................72
Revision: March 2010 2008 QX56

CCS
ICC UNITCCS-47
< ECU DIAGNOSIS >
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Wiring DiagramINFOID:0000000001731893
AAOWA0002GB
Revision: March 2010 2008 QX56

CHG
CHG-1
ELECTRICAL & POWER CONTROL
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SECTION CHG
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CONTENTS
CHARGING SYSTEM
PRECAUTION .......
........................................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
2
Precaution for Power Generation Variable Voltage
Control System ..........................................................
3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Special Service Tool ........................................... ......4
Commercial Service Tool ..........................................4
BASIC INSPECTION ....................................5
DIAGNOSIS AND REPAIR WORKFLOW ..... .....5
Work Flow ........................................................... ......5
FUNCTION DIAGNOSIS ...............................8
CHARGING SYSTEM ..................................... .....8
System Diagram .................................................. ......8
System Description ...................................................8
Component Description ............................................8
POWER GENERATION VOLTAGE VARI-
ABLE CONTROL SYSTEM .................................
9
System Diagram .................................................. ......9
System Description ...................................................9
Component Description .............................................9
COMPONENT DIAGNOSIS .........................10
CHARGING SYSTEM PRELIMINARY IN-
SPECTION ....... .................................................
10
Inspection Procedure ........................................... ....10
POWER GENERATION VOLTAGE VARI-
ABLE CONTROL SYSTEM OPERATION IN-
SPECTION ........................................................
11
Inspection Procedure ........................................... ....11
B TERMINAL CIRCUIT .....................................13
Description ...............................................................13
Diagnosis Procedure ...............................................13
L TERMINAL CIRCUIT .....................................14
Description ...............................................................14
Diagnosis Procedure ...............................................14
S TERMINAL CIRCUIT .....................................15
Description ...............................................................15
Diagnosis Procedure ...............................................15
CHARGING SYSTEM .......................................16
Wiring Diagram ........................................................16
SYMPTOM DIAGNOSIS ..............................21
CHARGING SYSTEM .......................................21
Symptom Table ................................................... ....21
ON-VEHICLE REPAIR .................................22
GENERATOR ....................................................22
Removal and Installation ..................................... ....22
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ...
23
GENERATOR ....................................................23
Generator ............................................................ ....23
Revision: March 2010 2008 QX56

CHG-16
< COMPONENT DIAGNOSIS >
CHARGING SYSTEM
CHARGING SYSTEM
Wiring DiagramINFOID:0000000001696192
AAMWA0085GB
Revision: March 20102008 QX56

DEF-1
DRIVER CONTROLS
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SECTION DEF
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CONTENTS
DEFOGGER
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Repair Work Flow ................................................ ......3
FUNCTION DIAGNOSIS ...............................4
REAR WINDOW DEFOGGER SYSTEM ........ .....4
System Diagram .................................................. ......4
System Description ...................................................4
Component Parts Location ........................................5
Component Description .............................................5
DIAGNOSIS SYSTEM (BCM) .............................6
COMMON ITEM ..................................................... ......6
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .......................................................
6
REAR WINDOW DEFOGGER ............................... ......6
REAR WINDOW DEFOGGER : CONSULT-III
Function (BCM - REAR DEFOGGER) ......................
6
CAN COMMUNICATION .....................................7
System Description ............................................. ......7
COMPONENT DIAGNOSIS ..........................8
REAR WINDOW DEFOGGER SWITCH ........ .....8
Description .......................................................... ......8
Component Function Check ......................................8
Diagnosis Procedure .................................................8
REAR WINDOW DEFOGGER RELAY ...............9
Description .......................................................... ......9
Component Function Check ......................................9
Diagnosis Procedure .................................................9
REAR WINDOW DEFOGGER POWER SUP-
PLY AND GROUND CIRCUIT ............................
10
Description .......................................................... ....10
Component Function Check ....................................10
Diagnosis Procedure ...............................................10
Component Inspection ......................................... ....11
DOOR MIRROR DEFOGGER LH .....................12
Description ...............................................................12
Component Function Check ....................................12
Diagnosis Procedure ...............................................12
Component Inspection .............................................13
DOOR MIRROR DEFOGGER RH .....................14
Description ...............................................................14
Component Function Check ....................................14
Diagnosis Procedure ...............................................14
Component Inspection .............................................15
ECU DIAGNOSIS .........................................16
BCM (BODY CONTROL MODULE) .................16
Reference Value .................................................. ....16
Wiring Diagram ........................................................17
SYMPTOM DIAGNOSIS ..............................25
REAR WINDOW DEFOGGER AND DOOR
MIRROR DEFOGGER DO NOT OPERATE. ....
25
Diagnosis Procedure ........................................... ....25
REAR WINDOW DEFOGGER DOES NOT
OPERATE BUT BOTH OF DOOR MIRROR
DEFOGGER OPERATE. ...................................
26
Diagnosis Procedure ...............................................26
BOTH DOORS MIRROR DEFOGGER DON’T
OPERATE BUT REAR WINDOW DEFOG-
GER OPERATES ..............................................
27
Diagnosis Procedure ...............................................27
DRIVER SIDE DOOR MIRROR DEFOGGER
DOES NOT OPERATE. .....................................
28
Diagnosis Procedure ...............................................28
PASSENGER SIDE DOOR MIRROR DEFOG-
GER DOES NOT OPERATE. ............................
29
Revision: March 2010 2008 QX56

BCM (BODY CONTROL MODULE)DEF-17
< ECU DIAGNOSIS >
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Wiring DiagramINFOID:0000000001735636
ALLWA0058GB
Revision: March 2010 2008 QX56