2011 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2011 Factory Service Manual
CCS-2
WIRING DIAGRAM .....................................57
INTELLIGENT CRUISE CONTROL ............... ...57
Wiring Diagram .................................................... ...57
BASIC INSPEC

CCS-2
WIRING DIAGRAM .....................................57
INTELLIGENT CRUISE CONTROL ............... ...57
Wiring Diagram .................................................... ...57
BASIC INSPECTION ...................................69
DIAGNOSIS AND REPAIR WORK FLOW ..... ...69
Work Flow ............................................................ ...69
ADDITIONAL SERVICE WHEN REPLACING
ICC SENSOR .....................................................
71
Description ........................................................... ...71
Work Procedure ......................................................71
LASER BEAM AIMING ADJUSTMENT ............72
Description ........................................................... ...72
Work Procedure (Preparation) ................................72
Work Procedure (Setting The ICC Target Board) ...72
Work Procedure (Laser Beam Aiming Adjustment)
...
75
ACTION TEST ...................................................77
Description ........................................................... ...77
Work Procedure (Vehicle-To-Vehicle Distance
Control Mode) .........................................................
77
Work Procedure [Conventional (Fixed Speed)
Cruise Control Mode] ..............................................
80
DTC/CIRCUIT DIAGNOSIS ...................... ...83
C1A00 CONTROL UNIT ................................. ...83
ADAS CONTROL UNIT ......................................... ...83
ADAS CONTROL UNIT : DTC Logic ......................83
ADAS CONTROL UNIT : Diagnosis Procedure ......83
ICC SENSOR ......................................................... ...83
ICC SENSOR : DTC Logic .....................................83
ICC SENSOR : Diagnosis Procedure .....................83
C1A01 POWER SUPPLY CIRCUIT 1, C1A02
POWER SUPPLY CIRCUIT 2 ............................
85
ADAS CONTROL UNIT ......................................... ...85
ADAS CONTROL UNIT : DTC Logic ......................85
ADAS CONTROL UNIT : Diagnosis Procedure ......85
ICC SENSOR ......................................................... ...85
ICC SENSOR : DTC Logic .....................................85
ICC SENSOR : Diagnosis Procedure .....................86
C1A03 VEHICLE SPEED SENSOR ..................87
DTC Logic ............................................................ ...87
Diagnosis Procedure ..............................................87
C1A04 ABS/TCS/VDC SYSTEM .......................89
DTC Logic ............................................................ ...89
Diagnosis Procedure ..............................................89
C1A05 BRAKE SW/STOP LAMP SW ...............90
DTC Logic ............................................................ ...90
Diagnosis Procedure ..............................................90
Component Inspection (ICC Brake Switch) ......... ...93
Component Inspection (Stop Lamp Switch) ............93
C1A06 OPERATION SW ...................................94
DTC Logic ............................................................ ...94
Diagnosis Procedure ...............................................94
Component Inspection ............................................95
C1A12 LASER BEAM OFF CENTER ...............96
ADAS CONTROL UNIT .......................................... ...96
ADAS CONTROL UNIT : DTC Logic ......................96
ADAS CONTROL UNIT : Diagnosis Procedure ......96
ICC SENSOR .......................................................... ...96
ICC SENSOR : DTC Logic ......................................96
ICC SENSOR : Diagnosis Procedure .....................96
C1A13 STOP LAMP RELAY .............................97
DTC Logic ............................................................ ...97
Diagnosis Procedure ...............................................97
Component Inspection ..........................................102
C1A14 ECM ......................................................103
DTC Logic ............................................................ .103
Diagnosis Procedure .............................................103
C1A15 GEAR POSITION .................................104
Description ........................................................... .104
DTC Logic .............................................................104
Diagnosis Procedure .............................................104
C1A16 RADAR STAIN ................................... ..106
ADAS CONTROL UNIT .......................................... .106
ADAS CONTROL UNIT : DTC Logic ....................106
ADAS CONTROL UNIT : Diagnosis Procedure ....106
ICC SENSOR .......................................................... .106
ICC SENSOR : DTC Logic ....................................106
ICC SENSOR : Diagnosis Procedure ...................107
C1A17 ICC SENSOR ........................................108
DTC Logic ............................................................ .108
Diagnosis Procedure .............................................108
C1A18 LASER AIMING INCMP .......................109
ADAS CONTROL UNIT .......................................... .109
ADAS CONTROL UNIT : DTC Logic ....................109
ADAS CONTROL UNIT : Diagnosis Procedure ....109
ICC SENSOR .......................................................... .109
ICC SENSOR : DTC Logic ....................................109
ICC SENSOR : Diagnosis Procedure ...................110
C1A21 UNIT HIGH TEMP .................................111
ADAS CONTROL UNIT .......................................... .111
ADAS CONTROL UNIT : DTC Logic ....................111
ADAS CONTROL UNIT : Diagnosis Procedure ....111
ICC SENSOR .......................................................... .111
ICC SENSOR : DTC Logic ....................................111
Revision: 2010 May2011 QX56

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ICC SENSOR : Diagnosis Procedure .................
..
112
C1A24 NP RANGE ...........................................113
DTC Logic ...........................

CCS-3
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ICC SENSOR : Diagnosis Procedure .................
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112
C1A24 NP RANGE ...........................................113
DTC Logic ........................................................... ..113
Diagnosis Procedure .............................................113
C1A26 ECD MODE MALFUNCTION ...............115
DTC Logic ........................................................... ..115
Diagnosis Procedure .............................................115
C1A27 ECD POWER SUPPLY CIRCUIT .........116
DTC Logic ........................................................... ..116
Diagnosis Procedure .............................................116
C1A2A ICC SENSOR POWER SUPPLY CIR-
CUIT ..................................................................
117
DTC Logic ........................................................... ..117
Diagnosis Procedure .............................................117
C1A33 CAN TRANSMISSION ERROR ...........118
DTC Logic ........................................................... ..118
Diagnosis Procedure .............................................118
C1A34 COMMAND ERROR .............................119
DTC Logic ........................................................... ..119
Diagnosis Procedure .............................................119
C1A35 ACCELERATOR PEDAL ACTUATOR ..120
DTC Logic ........................................................... ..120
Diagnosis Procedure .............................................120
C1A36 ACCELERATOR PEDAL ACTUATOR
CAN COMM ......................................................
121
DTC Logic ........................................................... ..121
Diagnosis Procedure .............................................121
C1A37 ACCELERATOR PEDAL ACTUATOR
CAN 2 ...............................................................
122
DTC Logic ........................................................... ..122
Diagnosis Procedure .............................................122
C1A38 ACCELERATOR PEDAL ACTUATOR
CAN 1 ...............................................................
123
DTC Logic ........................................................... ..123
Diagnosis Procedure .............................................123
C1A39 STEERING ANGLE SENSOR ..............124
ADAS CONTROL UNIT ......................................... ..124
ADAS CONTROL UNIT : DTC Logic ....................124
ADAS CONTROL UNIT : Diagnosis Procedure ....124
ICC SENSOR ......................................................... ..124
ICC SENSOR : DTC Logic ....................................124
ICC SENSOR : Diagnosis Procedure ...................125
C1A40 SYSTEM SWITCH CIRCUIT ................126
DTC Logic ........................................................... ..126
Diagnosis Procedure .............................................126
Component Inspection (IBA OFF Switch) .............127
C1A50 ADAS CONTROL UNIT .......................128
DTC Logic ............................................................ ..128
Diagnosis Procedure .............................................128
C1F01 ACCELERATOR PEDAL ACTUATOR .129
DTC Logic ............................................................ ..129
Diagnosis Procedure .............................................129
C1F02 ACCELERATOR PEDAL ACTUATOR .130
DTC Logic ............................................................ ..130
Diagnosis Procedure .............................................130
C1F05 ACCELERATOR PEDAL ACTUATOR
POWER SUPPLY CIRCUIT ............................
131
DTC Logic ..............................................................131
Diagnosis Procedure .............................................131
U0104 ADAS CAN 1 .......................................132
DTC Logic ............................................................ ..132
Diagnosis Procedure .............................................132
U0121 VDC CAN 2 ..........................................133
ADAS CONTROL UNIT ......................................... ..133
ADAS CONTROL UNIT : DTC Logic .....................133
ADAS CONTROL UNIT : Diagnosis Procedure ....133
ICC SENSOR ......................................................... ..133
ICC SENSOR : DTC Logic ....................................133
ICC SENSOR : Diagnosis Procedure ....................134
U0126 STRG SEN CAN 1 ...............................135
ADAS CONTROL UNIT ......................................... ..135
ADAS CONTROL UNIT : DTC Logic .....................135
ADAS CONTROL UNIT : Diagnosis Procedure ....135
ICC SENSOR ......................................................... ..135
ICC SENSOR : DTC Logic ....................................135
ICC SENSOR : Diagnosis Procedure ....................136
U0235 ICC SENSOR CAN 1 ...........................137
DTC Logic ............................................................ ..137
Diagnosis Procedure .............................................137
U0401 ECM CAN 1 .........................................138
DTC Logic ..............................................................138
Diagnosis Procedure .............................................138
U0402 TCM CAN 1 ..........................................139
DTC Logic ............................................................ ..139
Diagnosis Procedure .............................................139
U0405 ADAS CAN 2 .......................................140
DTC Logic ............................................................ ..140
Diagnosis Procedure .............................................140
U0415 VDC CAN 1 ..........................................141
ADAS CONTROL UNIT ......................................... ..141
ADAS CONTROL UNIT : DTC Logic .....................141
ADAS CONTROL UNIT : Diagnosis Procedure ....141
ICC SENSOR ......................................................... ..141
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
CCS-4
ICC SENSOR : DTC Logic ....................................141
ICC SENSOR : Diagnosis Procedure ....................142
U0428 STRG SEN CAN 2 ................................143
ADAS CONTROL U

CCS-4
ICC SENSOR : DTC Logic ....................................141
ICC SENSOR : Diagnosis Procedure ....................142
U0428 STRG SEN CAN 2 ................................143
ADAS CONTROL UNIT ......................................... ..143
ADAS CONTROL UNIT : DTC Logic .....................143
ADAS CONTROL UNIT : Diagnosis Procedure .....143
ICC SENSOR ......................................................... ..143
ICC SENSOR : DTC Logic ....................................143
ICC SENSOR : Diagnosis Procedure ....................144
U1000 CAN COMM CIRCUIT ..........................145
ADAS CONTROL UNIT ......................................... ..145
ADAS CONTROL UNIT : Description ....................145
ADAS CONTROL UNIT : DTC Logic .....................145
ADAS CONTROL UNIT : Diagnosis Procedure .....145
ICC SENSOR ......................................................... ..145
ICC SENSOR : Description ...................................145
ICC SENSOR : DTC Logic ....................................145
ICC SENSOR : Diagnosis Procedure ....................146
U1010 CONTROL UNIT (CAN) .......................147
ADAS CONTROL UNIT ......................................... ..147
ADAS CONTROL UNIT : Description ....................147
ADAS CONTROL UNIT : DTC Logic .....................147
ADAS CONTROL UNIT : Diagnosis Procedure .....147
ICC SENSOR ......................................................... ..147
ICC SENSOR : Description ...................................147
ICC SENSOR : DTC Logic ....................................147
ICC SENSOR : Diagnosis Procedure ....................147
U150B ECM CAN 3 .........................................148
DTC Logic ............................................................ ..148
Diagnosis Procedure .............................................148
U150C VDC CAN 3 ..........................................149
DTC Logic ............................................................ ..149
Diagnosis Procedure .............................................149
U150D TCM CAN 3 ..........................................150
DTC Logic ............................................................ ..150
Diagnosis Procedure .............................................150
U150E BCM CAN 3 .........................................151
DTC Logic ............................................................ ..151
Diagnosis Procedure .............................................151
U1502 ICC SENSOR CAN COMM CIRC ........152
DTC Logic ............................................................ ..152
Diagnosis Procedure .............................................152
U1513 METER CAN 3 .....................................153
DTC Logic ............................................................ ..153
Diagnosis Procedure .............................................153
U1514 STRG SEN CAN 3 ................................154
DTC Logic ............................................................ ..154
Diagnosis Procedure ............................................ .154
U1515 ICC SENSOR CAN 3 ............................155
DTC Logic ............................................................ .155
Diagnosis Procedure .............................................155
U1517 ACCELERATOR PEDAL ACTUATOR
CAN 3 ...............................................................
156
DTC Logic ............................................................ .156
Diagnosis Procedure .............................................156
U1520 4WD CAN 3 ...........................................157
DTC Logic ............................................................ .157
Diagnosis Procedure .............................................157
POWER SUPPLY AND GROUND CIRCUIT ....158
ADAS CONTROL UNIT .......................................... .158
ADAS CONTROL UNIT : Diagnosis Procedure ....158
ICC SENSOR .......................................................... .158
ICC SENSOR : Diagnosis Procedure ...................158
SYMPTOM DIAGNOSIS ...........................160
INTELLIGENT CRUISE CONTROL SYSTEM
SYMPTOMS .................................................... ..
160
Symptom Table .................................................... .160
MAIN SWITCH DOES NOT TURN ON, MAIN
SWITCH DOES NOT TURN OFF .....................
161
Description ........................................................... .161
Diagnosis Procedure .............................................161
ICC SYSTEM CANNOT BE SET (MAIN
SWITCH TURNS ON/OFF) ...............................
162
Description ........................................................... .162
Diagnosis Procedure .............................................162
ICC STEERING SWITCH (OTHER THAN
MAIN SWITCH) DOES NOT FUNCTION .........
164
Description ........................................................... .164
Diagnosis Procedure .............................................164
ICC SYSTEM DOES NOT CANCEL WHEN A/
T SELECTOR LEVER SETS ON "N" ...............
165
Description ........................................................... .165
Diagnosis Procedure .............................................165
CHIME DOES NOT SOUND .............................166
Description ........................................................... .166
Diagnosis Procedure .............................................166
DRIVING FORCE IS HUNTING ........................168
Description ........................................................... .168
Diagnosis Procedure .............................................168
FREQUENTLY CANNOT DETECT THE VEHI-
CLE AHEAD / DETECTION ZONE IS SHORT ..
169
Description ........................................................... .169
Diagnosis Procedure .............................................169
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
CCS-5
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THE SYSTEM DOES NOT DETECT THE VE-
HICLE AHEAD AT ALL .................................. ..
171
Description ....................................................

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INFINITI QX56 2011 Factory Service Manual
CCS-6
< PRECAUTION >[ICC]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006224261
The Supplemental Rest

CCS-6
< PRECAUTION >[ICC]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006224261
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/INFINITI dealer.
Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precautions For Harness RepairINFOID:0000000006224262
ITS communication uses a twisted pair line. Be careful when repairing it.
Solder the repaired area and wrap tape around the soldered area.
NOTE:
A fray of twisted lines must be within 110 mm (4.33 in).
SKIB8766E
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
CCS
PRECAUTIONSCCS-7
< PRECAUTION > [ICC]
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Bypass connection is never allowed at the repaired area. NOTE:
Bypass connection may cause ITS communication error. The
splic

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INFINITI QX56 2011 Factory Service Manual
CCS-8
< PREPARATION >[ICC]
PREPARATION
PREPARATION
PREPARATION
Special Service ToolsINFOID:0000000006224264
The actual shapes of Kent-Moore tools may differ fr
om those of special service tools illus

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INFINITI QX56 2011 Factory Service Manual
CCS
COMPONENT PARTSCCS-9
< SYSTEM DESCRIPTION > [ICC]
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SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000006224265
1. ICC steering switch 2. Inform

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