Wiring INFINITI QX56 2011 Factory Service Manual

LAN
LAN-1
ELECTRICAL & POWER CONTROL
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SECTION LAN
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CONTENTS
LAN SYSTEM
CAN FUNDAMENTAL
PRECAUTION ................ ...............................
7
PRECAUTIONS .............................................. .....7
Precautions for Trouble Diagnosis ...................... ......7
Precautions for Harness Repair ................................7
SYSTEM DESCRIPTION ..............................8
SYSTEM ......................................................... .....8
CAN COMMUNICATION SYSTEM .............................8
CAN COMMUNICATION SYSTEM : System De-
scription ............................................................... ......
8
CAN COMMUNICATION SYSTEM : System Dia-
gram ..........................................................................
8
CAN COMMUNICATION SYSTEM : CAN Com-
munication Control Circuit .........................................
9
DIAG ON CAN ....................................................... ......9
DIAG ON CAN : Description .....................................9
DIAG ON CAN : System Diagram ...........................10
TROUBLE DIAGNOSIS .....................................11
Condition of Error Detection ................................ ....11
Symptom When Error Occurs in CAN Communi-
cation System ...................................................... ....
11
CAN Diagnosis with CONSULT-III ..........................14
Self-Diagnosis .........................................................15
CAN Diagnostic Support Monitor ............................15
How to Use CAN Communication Signal Chart ......17
BASIC INSPECTION ...................................18
DIAGNOSIS AND REPAIR WORKFLOW ..... ....18
Trouble Diagnosis Flow Chart ............................. ....18
Trouble Diagnosis Procedure ..................................18
CAN
HOW TO USE THIS MANU AL .....................
23
HOW TO USE THIS SECTION ....................... ....23
Caution ................................................................ ....23
Abbreviation List ......................................................23
PRECAUTION ..............................................24
PRECAUTIONS .................................................24
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
24
Precautions for Trouble Diagnosis ..........................24
Precautions for Harness Repair ..............................24
SYSTEM DESCRIPTION .............................26
COMPONENT PARTS ......................................26
Component Parts Location .................................. ....26
SYSTEM ............................................................27
CAN COMMUNICATION SYSTEM ........................ ....27
CAN COMMUNICATION SYSTEM : CAN System
Specification Chart .............................................. ....
27
CAN COMMUNICATION SYSTEM : CAN Com-
munication Signal Chart ..........................................
28
WIRING DIAGRAM ......................................33
CAN SYSTEM (WITH ICC) ...............................33
Wiring Diagram .................................................... ....33
CAN SYSTEM (WITHOUT ICC) ........................46
Wiring Diagram ........................................................46
BASIC INSPECTION ...................................56
DIAGNOSIS AND REPAIR WORKFLOW ........56
Interview Sheet .................................................... ....56
DTC/CIRCUIT DIAGNOSIS .........................57
MALFUNCTION AREA CHART ........................57
System Diagram .................................................. ....57
CAN Communication Circuit ....................................57
Revision: 2010 May2011 QX56

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Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................
..
102
SYSTEM DESCRIPTION ...........................103
COMPONENT PARTS ................................... ..103
Component Parts Location .................................. ..103
SYSTEM ...........................................................104
System Description ............................................. ..104
DIAGNOSIS SYSTEM (CAN GATEWAY) .......105
CONSULT-III Function ........................................ ..105
ECU DIAGNOSIS INFORMATION ............106
CAN GATEWAY ............................................. ..106
Reference Value ................................................. ..106
DTC Inspection Priority Chart .............................106
DTC Index ............................................................106
WIRING DIAGRAM ....................................108
CAN GATEWAY SYSTEM ............................. ..108
Wiring Diagram ................................................... ..108
BASIC INSPECTION .................................110
ADDITIONAL SERVICE WHEN REPLACING
CAN GATEWAY ............................................. ..
110
Description .......................................................... ..110
Work Procedure ....................................................110
CONFIGURATION (CAN GATEWAY) .............111
Description .......................................................... ..111
Work Procedure ....................................................111
DTC/CIRCUIT DIAGNOSIS .......................113
U1000 CAN COMM CIRCUIT ......................... ..113
Description .......................................................... ..113
DTC Logic .............................................................113
Diagnosis Procedure .............................................113
U1010 CONTROL UNIT (CAN) ........................114
Description .......................................................... ..114
DTC Logic .............................................................114
Diagnosis Procedure .............................................114
B2600 CONFIG ERROR ..................................115
Description .......................................................... ..115
DTC Logic .............................................................115
Diagnosis Procedure .............................................115
POWER SUPPLY AND GROUND CIRCUIT ....116
Diagnosis Procedure ........................................... ..116
REMOVAL AND INSTALLATION .............117
CAN GATEWAY ............................................. ..117
Removal and Installation ..................................... ..117
CAN SYSTEM (TYPE 1)
DTC/CIRCUIT DIAGNOSIS .......................
118
MAIN LINE BETWEEN ABS AND DLC CIR-
CUIT ................................................................
118
Diagnosis Procedure ........................................... ..118
MAIN LINE BETWEEN DLC AND E-SUS CIR-
CUIT ................................................................
119
Diagnosis Procedure .............................................119
MAIN LINE BETWEEN E-SUS AND ADP CIR-
CUIT ................................................................
120
Diagnosis Procedure .............................................120
ECM BRANCH LINE CIRCUIT .......................121
Diagnosis Procedure .............................................121
ABS BRANCH LINE CIRCUIT ........................122
Diagnosis Procedure .............................................122
TCM BRANCH LINE CIRCUIT ........................123
Diagnosis Procedure .............................................123
A-BAG BRANCH LINE CIRCUIT ....................124
Diagnosis Procedure .............................................124
AV BRANCH LINE CIRCUIT ..........................125
Diagnosis Procedure .............................................125
BCM BRANCH LINE CIRCUIT .......................126
Diagnosis Procedure .............................................126
DLC BRANCH LINE CIRCUIT ........................127
Diagnosis Procedure .............................................127
HVAC BRANCH LINE CIRCUIT .....................128
Diagnosis Procedure .............................................128
M&A BRANCH LINE CIRCUIT .......................129
Diagnosis Procedure .............................................129
STRG BRANCH LINE CIRCUIT .....................130
Diagnosis Procedure .............................................130
TPMS BRANCH LINE CIRCUIT .....................131
Diagnosis Procedure .............................................131
IPDM-E BRANCH LINE CIRCUIT ...................132
Diagnosis Procedure .............................................132
ADP BRANCH LINE CIRCUIT ........................133
Diagnosis Procedure .............................................133
E-SUS BRANCH LINE CIRCUIT ....................134
Diagnosis Procedure .............................................134
PWBD BRANCH LINE CIRCUIT ....................135
Diagnosis Procedure .............................................135
CAN COMMUNICATION CIRCUIT .................136
Diagnosis Procedure .............................................136
Revision: 2010 May2011 QX56

LAN
TROUBLE DIAGNOSISLAN-11
< SYSTEM DESCRIPTION > [CAN FUNDAMENTAL]
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TROUBLE DIAGNOSIS
Condition of Error DetectionINFOID:0000000006220517
DTC of CAN communication is indicated on SELF-DIA
G RESULTS on CONSULT-III if a CAN communication
signal is not transmitted or received between units for 2 seconds or more.
NOTE:
DTCs of CAN communication are as follows:
 U0101
 U0140
 U0164
 U1000
 U1001
 U1507
 U1508
CAN COMMUNICATION SYSTEM ERROR
 CAN communication line open (CAN-H, CAN-L, or both)
 CAN communication line short (ground, betw een CAN communication lines, other harnesses)
 Error of CAN communication control circuit of the unit connected to CAN communication line
WHEN DTC OF CAN COMMUNICATION IS I NDICATED EVEN THOUGH CAN COMMUNICATION
SYSTEM IS NORMAL
 Removal/installation of parts: Error may be detec ted when removing and installing CAN communication unit
and related parts while turning the ignition switch ON. (A DTC except for CAN communication may be
detected.)
 Fuse blown out (removed): CAN communication of the unit may cease.
 Voltage drop: Error may be detected if voltage drops due to discharged battery when turning the ignition
switch ON (Depending on the control unit which carries out CAN communication).
 Error may be detected if the power supply circuit of the control unit, which carries out CAN communication,
malfunctions (Depending on the control unit which carries out CAN communication).
 Error may be detected if reprogramming is not completed normally.
CAUTION:
CAN communication system is normal if DTC of CAN communication is indicated on SELF-DIAG
RESULTS of CONSULT-III under th e above conditions. Erase the memo ry of the self-diagnosis of each
unit.
Symptom When Error Occurs in CAN Communication SystemINFOID:0000000006220518
In CAN communication system, multiple units mutually transmit and receive signals. Each unit cannot transmit
and receive signals if any error occurs on CAN communicati on line. Under this condition, multiple control units
related to the root cause malfunction or go into fail-safe mode.
ERROR EXAMPLE
NOTE:
 Each vehicle differs in symptom of each unit under fail-safe mode and CAN communication line wiring.
 Refer to LAN-23, "
Abbreviation List" for the unit abbreviation.
Revision: 2010 May2011 QX56

LAN-24
< PRECAUTION >[CAN]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006238426
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 Trouble DiagnosisINFOID:0000000006220528
CAUTION:
 Never apply 7.0 V or more to the measurement terminal.
 Use a tester with open terminal voltage of 7.0 V or less.
 Turn the ignition switch OFF and disconnect th e battery cable from the negative terminal when
checking the harness.
Precautions for Harness RepairINFOID:0000000006220529
 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

LAN
CAN SYSTEM (WITH ICC)LAN-33
< WIRING DIAGRAM > [CAN]
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WIRING DIAGRAM
CAN SYSTEM (WITH ICC)
Wiring DiagramINFOID:0000000006238445
JCMWM8300GB
Revision: 2010 May2011 QX56

LAN-34
< WIRING DIAGRAM >[CAN]
CAN SYSTEM (WITH ICC)
JCMWM8301GB
Revision: 2010 May2011 QX56

LAN
CAN SYSTEM (WITH ICC)LAN-35
< WIRING DIAGRAM > [CAN]
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JCMWM8302GB
Revision: 2010 May2011 QX56

LAN-36
< WIRING DIAGRAM >[CAN]
CAN SYSTEM (WITH ICC)
JCMWM8303GB
Revision: 2010 May2011 QX56

LAN
CAN SYSTEM (WITH ICC)LAN-37
< WIRING DIAGRAM > [CAN]
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JCMWM8304GB
Revision: 2010 May2011 QX56

LAN-38
< WIRING DIAGRAM >[CAN]
CAN SYSTEM (WITH ICC)
JCMWM8305GB
Revision: 2010 May2011 QX56