Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti QX56 JA60 2004-2005 Approved 2004_QX56 lan
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K ELECTRICAL
A
SECTION LAN LAN SYSTEM
B
C
D
E
CONTENTS
CAN Front Air Control Circuit Check .............................. 47 . F
ABS Actuator and Electric Unit (Control Unit) Circuit
PRECAUTIONS ......................................................... 3 . Check .................................................................... 47
.
Precautions for Supplemental Restraint System IPDM E/R Circuit Check ........................................ 48 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- CAN Communication Circuit Check ....................... 48 .
SIONER" ................................................................. 3
. IPDM E/R Ignition Relay Circuit Check ................. 49 .
Precautions When Using CONSULT-II .................... 3 . Component Inspection ........................................... 49 .
CHECK POINTS FOR USING CONSULT-II ........ 3 . H
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
Precautions For Trouble Diagnosis ......................... 3 . TION ................................................................... 49
.
CAN SYSTEM ...................................................... 3 . CAN SYSTEM (TYPE 2) .......................................... 50 .
Precautions For Harness Repair ............................. 4 . System Description ................................................ 50 . I
CAN SYSTEM ...................................................... 4 . Component Parts and Harness Connector Location 50 ...
CAN COMMUNICATION ........................................... 5 . Schematic .............................................................. 51
.
System Description ................................................. 5 . Wiring Diagram - CAN - ......................................... 52 . J
CAN Communication Unit ....................................... 5 . Work Flow .............................................................. 55
.
TYPE1 .................................................................. 5
. CHECK SHEET .................................................. 57 .
TYPE2 .................................................................. 8
. CHECK SHEET RESULTS (EXAMPLE) ............ 59 .
TYPE 3 ............................................................... 10
. LAN
Circuit Check Between TCM and ICC Sensor ....... 78 .
TYPE 4 ............................................................... 13
. Circuit Check Between ICC Sensor and ICC Unit... 79
CAN SYSTEM (TYPE 1) .......................................... 16 . Circuit Check Between ICC Unit and Driver Seat
System Description ............................................... 16 . Control Unit ............................................................ 80
. L
Component Parts and Harness Connector Location 16 ... Circuit Check Between Driver Seat Control Unit and
Schematic ............................................................. 17
. Data Link Connector .............................................. 80 .
Wiring Diagram - CAN - ........................................ 18 . Circuit Check Between Data Link Connector and M
Work Flow ............................................................. 21
. IPDM E/R ............................................................... 81
.
CHECK SHEET .................................................. 23 . ECM Circuit Check ................................................ 82 .
CHECK SHEET RESULTS (EXAMPLE) ............ 25 . TCM Circuit Check ................................................ 82 .
Circuit Check Between TCM and Driver Seat Con- ICC Sensor Circuit Check ...................................... 83 .
trol Unit .................................................................. 40
. ICC Unit Circuit Check ........................................... 83 .
Circuit Check Between Driver Seat Control Unit and Driver Seat Control Unit Circuit Check .................. 84 .
Data Link Connector ............................................. 41 . Combination Meter Circuit Check .......................... 84 .
Circuit Check Between Data Link Connector and Display Control Unit Circuit Check ........................ 85 .
IPDM E/R .............................................................. 42
. BCM Circuit Check ................................................ 85 .
ECM Circuit Check ................................................ 43 . Data Link Connector Circuit Check ....................... 86 .
TCM Circuit Check ................................................ 43 . Steering Angle Sensor Circuit Check .................... 86 .
Driver Seat Control Unit Circuit Check .................. 44 . Front Air Control Circuit Check .............................. 87 .
Combination Meter Circuit Check ......................... 44 . ABS Actuator and Electric Unit (Control Unit) Circuit
Display Control Unit Circuit Check ........................ 45 . Check .................................................................... 87
.
BCM Circuit Check ................................................ 45 . IPDM E/R Circuit Check ........................................ 88 .
Data Link Connector Circuit Check ....................... 46 . CAN Communication Circuit Check ....................... 88 .
Steering Angle Sensor Circuit Check .................... 46 .
Revision: August 2007 LAN-1 2004 QX56
IPDM E/R Ignition Relay Circuit Check .................. 89 . CAN SYSTEM (TYPE 4) ......................................... 126 .
Component Inspection ........................................... 89 . System Description .............................................. 126 .
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC- Component Parts and Harness Connector Location .126
TION ................................................................... 89
. Schematic ............................................................ 127
.
CAN SYSTEM (TYPE 3) .......................................... 90 . Wiring Diagram - CAN - ....................................... 128 .
System Description ................................................ 90 . Work Flow ............................................................ 131
.
Component Parts and Harness Connector Location 90 ... CHECK SHEET ................................................ 133 .
Schematic .............................................................. 91
. CHECK SHEET RESULTS (EXAMPLE) ........... 135 .
Wiring Diagram - CAN - ......................................... 92 . Circuit Check Between TCM and ICC Sensor ..... 155 .
Work Flow .............................................................. 95
. Circuit Check Between ICC Sensor and ICC Unit.156
CHECK SHEET .................................................. 97 . Circuit Check Between ICC Unit and Driver Seat
CHECK SHEET RESULTS (EXAMPLE) ............ 99 . Control Unit .......................................................... 157
.
Circuit Check Between TCM and Driver Seat Con- Circuit Check Between Driver Seat Control Unit and
trol Unit ................................................................ 115
. Data Link Connector ............................................ 157 .
Circuit Check Between Driver Seat Control Unit and Circuit Check Between Data Link Connector and
Data Link Connector ............................................ 116 . IPDM E/R ............................................................. 158
.
Circuit Check Between Data Link Connector and ECM Circuit Check ............................................... 159 .
IPDM E/R ............................................................. 117
. TCM Circuit Check ............................................... 159 .
ECM Circuit Check .............................................. 118 . ICC Sensor Circuit Check .................................... 160 .
TCM Circuit Check .............................................. 118 . ICC Unit Circuit Check ......................................... 160 .
Driver Seat Control Unit Circuit Check ................ 119 . Driver Seat Control Unit Circuit Check ................. 161 .
Combination Meter Circuit Check ........................ 119 . Combination Meter Circuit Check ........................ 161 .
Display Control Unit Circuit Check ....................... 120 . Display Control Unit Circuit Check ....................... 162 .
BCM Circuit Check .............................................. 120 . BCM Circuit Check ............................................... 162 .
Data Link Connector Circuit Check ...................... 121 . Data Link Connector Circuit Check ...................... 163 .
Steering Angle Sensor Circuit Check .................. 121 . Steering Angle Sensor Circuit Check ................... 163 .
Front Air Control Circuit Check ............................ 122 . Front Air Control Circuit Check ............................ 164 .
Transfer Control Unit Circuit Check ..................... 122 . Transfer Control Unit Circuit Check ..................... 164 .
ABS Actuator and Electric Unit (Control Unit) Circuit ABS Actuator and Electric Unit (Control Unit) Circuit
Check .................................................................. 123
. Check ................................................................... 165
.
IPDM E/R Circuit Check ...................................... 123 . IPDM E/R Circuit Check ....................................... 165 .
CAN Communication Circuit Check ..................... 124 . CAN Communication Circuit Check ..................... 166 .
IPDM E/R Ignition Relay Circuit Check ................ 124 . IPDM E/R Ignition Relay Circuit Check ................ 166 .
Component Inspection ......................................... 125 . Component Inspection ......................................... 167 .
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC- ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
TION ................................................................. 125
. TION ................................................................. 167
.
Revision: August 2007 LAN-2 2004 QX56
PRECAUTIONS
[CAN]
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" UKS0017I
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
with a front seat belt, helps to reduce the risk or severity 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 C
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING: D
G To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer. E
G Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section. F
G Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
G
Precautions When Using CONSULT-II UKS0017J
When connecting CONSULT-II to data link connector, connect them through CONSULT-II CONVERTER.
H
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
I
CHECK POINTS FOR USING CONSULT-II
1. Has CONSULT-II been used without connecting CONSULT-II CONVERTER on this vehicle?
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