Ins INFINITI QX56 2004 Factory Service Manual

IP-12
INSTRUMENT PANEL ASSEMBLY
Revision: August 20072004 QX56
REMOVAL AND INSTALLATION
Cluster Lid C
1. Remove center console. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Pull cluster lid C towards rear of vehicle to release clips.
3. Disconnect electrical connectors.
Installation is in the reverse order of removal.
CAUTION:
When removing and installing, place shop cloths onto surrounding parts to protect A/T finisher and
center console from damage.
Cluster Lid D
1. Remove cluster lid C. Refer to IP-12, "Cluster Lid C" .
2. Pull lid toward rear of vehicle to release clips, remove cluster lid D.

Disconnect electrical connectors.
Installation is in the reverse order of removal.
CAUTION:
When removing and installing, place shop cloths onto surrounding parts to protect A/T finisher and
center console from damage.
LIIA1336E
LIIA1337E

INSTRUMENT PANEL ASSEMBLY
IP-13
C
D
E
F
G
H
J
K
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MA
B
IP
Revision: August 20072004 QX56
Instrument Lower Cover LH
Remove screws using power tool, and remove instrument lower
cover LH.

Pull to disconnect clips.

Disconnect harnesses from back of instrument lower cover LH.
Installation is in the reverse order of removal.
Combination Meter
1. Remove instrument lower cover LH. Refer to IP-13, "Instrument Lower Cover LH" .
2. Remove the combination meter cover.
3. Remove cluster lid A.
4. Remove screws using power tool and remove the combination
meter assembly.

Disconnect electrical connectors.
Installation is in the reverse order of removal.
A/T Finisher
1. Remove shift knob.
2. Remove console mask.
3. Pull up to release clips and remove A/T finisher.

Disconnect harnesses.
Installation is in the reverse order of removal.
Display Assembly and Audio Unit
1. Remove audio unit. Refer to AV- 4 5 , "Removal and Installation for Audio Unit" .
2. Remove display assembly. Refer to AV- 1 5 8 , "
Removal and Installation of Display Unit" .
LIIA1327E
LIIA1249E
LIIA1335E

IP-14
INSTRUMENT PANEL ASSEMBLY
Revision: August 20072004 QX56
Instrument Lower Cover RH and Glove Box
1. Remove screws using power tool, release clips and remove
lower instrument panel RH and glove box as an assembly.
2. Remove damper clip from glove box.
3. Remove glove box pins and glove box.
4. Using power tool, remove screws and glove box striker.
5. Remove fuse block cover.
6. Remove screws and remove glove box damper.
Installation
Installation is in the reverse order of removal
1. Glove box damper 2. Lower instrument panel RH 3. Clips
4. Glove box pins 5. Glove box 6. Glove box striker
7. Fuse block cover 8. Glove box assembly
WIIA0666E
LLIA0072E

INSTRUMENT PANEL ASSEMBLY
IP-15
C
D
E
F
G
H
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K
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MA
B
IP
Revision: August 20072004 QX56
Disassembly and AssemblyEIS002XV
CENTER CONSOLE
WIIA0329E

IP-16
INSTRUMENT PANEL ASSEMBLY
Revision: August 20072004 QX56
1. Remove instrument lower cover RH. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Remove glove box assembly. Refer to IP-14, "
Instrument Lower Cover RH and Glove Box" .
3. Remove instrument lower cover LH. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
4. Remove shift knob and A/T console finisher. Refer to IP-13, "
A/T Finisher" .

Remove cup holder insert.

Remove shift indicator.
5. Remove cluster lid D. Refer to IP-12, "
Cluster Lid D" .
6. Disconnect shift cable and electrical harness from shifter.
7. Remove shifter.
8. Remove screws from center console.

Disconnect electrical harnesses.
9. Move front seats forward and remove center console assembly in a rearward direction.
10. Remove tray and mat from console bin.
11. Remove latch from console lid.
12. Remove hinge from console lid. Remove console lid.

Remove console lid mat.
13. Remove console bin.

Disconnect electrical harness from DVD player, if equipped.

Remove hinge from console bin.
14. Remove rear upper finisher.
15. Remove rear cup holder assembly.
16. Remove upper side finishers LH/RH.
17. Remove screws on each side, disconnect clips and remove console covers LH/RH.
18. Remove rear finisher assembly.

Disconnect electrical connectors.
19. Remove power point assembly.
20. Remove mask and storage compartment.
21. Remove console front bracket.
22. Remove heat duct and console rear duct.
23. Remove console rear bracket.
Assembly is in the reverse order of disassembly.
1. Console lid assembly 2. A/T finisher 3. Tray
4. Storage compartment 5. Storage compartment mask 6. Console reinforcement assembly
7. Console front bracket 8. Upper side finisher LH 9. Instrument lower cover LH
10. Console cover LH 11. Rear console duct 12. Power point assembly
13. Rear cup holder assembly 14. Rear finisher assembly 15. Console rear bracket
16. Heat duct 17. Rear upper finisher 18. Console bin mat
19. Console bin 20. Console cover RH 21. Instrument lower cover RH
22. Upper side finisher RH 23. A/T transmission control 24 Mask
25 Cup holder insert

INSTRUMENT PANEL ASSEMBLY
IP-17
C
D
E
F
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IP
Revision: August 20072004 QX56
Disassembly and AssemblyEIS002XW
REAR CONSOLE
1. Lid assembly 2. Lid latch 3. Console bin
4. Cup holder insert 5. Rear upper console assembly 6. Rubber bumper
7. Floor latch 8. Rear console floor bracket 9. Rear console floor base
10. Hinge cover 11. Hinge 12. Base hook
13. Rear lower console assembly 14. Console bin mat
LIIA0938E

IP-18
INSTRUMENT PANEL ASSEMBLY
Revision: August 20072004 QX56
1. Remove cup holder insert.
2. Release latch and remove rear console assembly.
3. Remove hinge cover.
4. Remove screws from hinge assembly and remove console lid assembly.

Remove hinge from upper console assembly.

Remove latch from lid assembly.
5. Remove screws and separate upper and lower console assemblies.

Remove floor latch from upper console assembly.
6. Remove screws and remove bin from upper console assembly.
7. Remove screws and remove floor base.
8. Remove bolts and remove floor bracket.
Assembly is in the reverse order of disassembly.

LAN-1
LAN SYSTEM
K ELECTRICAL
CONTENTS
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M
SECTION LAN
A
B
LAN
Revision: August 20072004 QX56
CAN
PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions When Using CONSULT-II ..................... 3
CHECK POINTS FOR USING CONSULT-II ......... 3
Precautions For Trouble Diagnosis .......................... 3
CAN SYSTEM ....................................................... 3
Precautions For Harness Repair .............................. 4
CAN SYSTEM ....................................................... 4
CAN COMMUNICATION ............................................ 5
System Description .................................................. 5
CAN Communication Unit ........................................ 5
TYPE1 ................................................................... 5
TYPE2 ................................................................... 8
TYPE 3 ................................................................ 10
TYPE 4 ................................................................ 13
CAN SYSTEM (TYPE 1) ........................................... 16
System Description ................................................ 16
Component Parts and Harness Connector Location ... 16
Schematic .............................................................. 17
Wiring Diagram - CAN - ......................................... 18
Work Flow .............................................................. 21
CHECK SHEET ................................................... 23
CHECK SHEET RESULTS (EXAMPLE) ............. 25
Circuit Check Between TCM and Driver Seat Con-
trol Unit ................................................................... 40
Circuit Check Between Driver Seat Control Unit and
Data Link Connector .............................................. 41
Circuit Check Between Data Link Connector and
IPDM E/R ............................................................... 42
ECM Circuit Check ................................................. 43
TCM Circuit Check ................................................. 43
Driver Seat Control Unit Circuit Check ................... 44
Combination Meter Circuit Check .......................... 44
Display Control Unit Circuit Check ......................... 45
BCM Circuit Check ................................................. 45
Data Link Connector Circuit Check ........................ 46
Steering Angle Sensor Circuit Check ..................... 46Front Air Control Circuit Check ............................... 47
ABS Actuator and Electric Unit (Control Unit) Circuit
Check ..................................................................... 47
IPDM E/R Circuit Check ......................................... 48
CAN Communication Circuit Check ........................ 48
IPDM E/R Ignition Relay Circuit Check .................. 49
Component Inspection ............................................ 49
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
TION .................................................................... 49
CAN SYSTEM (TYPE 2) ........................................... 50
System Description ................................................. 50
Component Parts and Harness Connector Location ... 50
Schematic ............................................................... 51
Wiring Diagram - CAN - .......................................... 52
Work Flow ............................................................... 55
CHECK SHEET ................................................... 57
CHECK SHEET RESULTS (EXAMPLE) ............. 59
Circuit Check Between TCM and ICC Sensor ........ 78
Circuit Check Between ICC Sensor and ICC Unit ... 79
Circuit Check Between ICC Unit and Driver Seat
Control Unit ............................................................. 80
Circuit Check Between Driver Seat Control Unit and
Data Link Connector ............................................... 80
Circuit Check Between Data Link Connector and
IPDM E/R ................................................................ 81
ECM Circuit Check ................................................. 82
TCM Circuit Check ................................................. 82
ICC Sensor Circuit Check ....................................... 83
ICC Unit Circuit Check ............................................ 83
Driver Seat Control Unit Circuit Check ................... 84
Combination Meter Circuit Check ........................... 84
Display Control Unit Circuit Check ......................... 85
BCM Circuit Check ................................................. 85
Data Link Connector Circuit Check ........................ 86
Steering Angle Sensor Circuit Check ..................... 86
Front Air Control Circuit Check ............................... 87
ABS Actuator and Electric Unit (Control Unit) Circuit
Check ..................................................................... 87
IPDM E/R Circuit Check ......................................... 88
CAN Communication Circuit Check ........................ 88

LAN-2Revision: August 20072004 QX56 IPDM E/R Ignition Relay Circuit Check ................... 89
Component Inspection ............................................ 89
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
TION .................................................................... 89
CAN SYSTEM (TYPE 3) ........................................... 90
System Description ................................................. 90
Component Parts and Harness Connector Location ... 90
Schematic ............................................................... 91
Wiring Diagram - CAN - .......................................... 92
Work Flow ............................................................... 95
CHECK SHEET ................................................... 97
CHECK SHEET RESULTS (EXAMPLE) ............. 99
Circuit Check Between TCM and Driver Seat Con-
trol Unit .................................................................115
Circuit Check Between Driver Seat Control Unit and
Data Link Connector .............................................116
Circuit Check Between Data Link Connector and
IPDM E/R ..............................................................117
ECM Circuit Check ...............................................118
TCM Circuit Check ...............................................118
Driver Seat Control Unit Circuit Check .................119
Combination Meter Circuit Check .........................119
Display Control Unit Circuit Check ........................120
BCM Circuit Check ...............................................120
Data Link Connector Circuit Check .......................121
Steering Angle Sensor Circuit Check ...................121
Front Air Control Circuit Check .............................122
Transfer Control Unit Circuit Check ......................122
ABS Actuator and Electric Unit (Control Unit) Circuit
Check ...................................................................123
IPDM E/R Circuit Check .......................................123
CAN Communication Circuit Check ......................124
IPDM E/R Ignition Relay Circuit Check .................124
Component Inspection ..........................................125
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
TION ..................................................................125CAN SYSTEM (TYPE 4) .......................................... 126
System Description ............................................... 126
Component Parts and Harness Connector Location . 126
Schematic ............................................................. 127
Wiring Diagram - CAN - ........................................ 128
Work Flow ............................................................. 131
CHECK SHEET ................................................. 133
CHECK SHEET RESULTS (EXAMPLE) ............ 135
Circuit Check Between TCM and ICC Sensor ...... 155
Circuit Check Between ICC Sensor and ICC Unit . 156
Circuit Check Between ICC Unit and Driver Seat
Control Unit ........................................................... 157
Circuit Check Between Driver Seat Control Unit and
Data Link Connector ............................................. 157
Circuit Check Between Data Link Connector and
IPDM E/R .............................................................. 158
ECM Circuit Check ................................................ 159
TCM Circuit Check ................................................ 159
ICC Sensor Circuit Check ..................................... 160
ICC Unit Circuit Check .......................................... 160
Driver Seat Control Unit Circuit Check .................. 161
Combination Meter Circuit Check ......................... 161
Display Control Unit Circuit Check ........................ 162
BCM Circuit Check ................................................ 162
Data Link Connector Circuit Check ....................... 163
Steering Angle Sensor Circuit Check .................... 163
Front Air Control Circuit Check ............................. 164
Transfer Control Unit Circuit Check ...................... 164
ABS Actuator and Electric Unit (Control Unit) Circuit
Check .................................................................... 165
IPDM E/R Circuit Check ........................................ 165
CAN Communication Circuit Check ...................... 166
IPDM E/R Ignition Relay Circuit Check ................. 166
Component Inspection .......................................... 167
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
TION .................................................................. 167

PRECAUTIONS
LAN-3
[CAN]
C
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LAN
Revision: August 20072004 QX56
PRECAUTIONSPFP:00001
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
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
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.
WA RN ING:

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.

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.

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.
Precautions When Using CONSULT-IIUKS0017J
When connecting CONSULT-II to data link connector, connect them through CONSULT-II CONVERTER.
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.
CHECK POINTS FOR USING CONSULT-II
1. Has CONSULT-II been used without connecting CONSULT-II CONVERTER on this vehicle?
–If YES, GO TO 2.
–If NO, GO TO 5.
2. Is there any indication other than indications relating to CAN communication system in the self-diagnosis
results?
–If YES, GO TO 3.
–If NO, GO TO 4.
3. Based on self-diagnosis results unrelated to CAN communication, carry out the inspection.
4. Malfunctions may be detected in self-diagnosis depending on control units carrying out CAN communica-
tion. Therefore, erase the self-diagnosis results.
5. Diagnose CAN communication system. Refer to LAN-5, "
CAN Communication Unit" .
Precautions For Trouble DiagnosisUKS0017K
CAN SYSTEM

Do not apply voltage of 7.0V or higher to the measurement terminals.

Use the tester with its open terminal voltage being 7.0V or less.

Be sure to turn ignition switch off and disconnect negative battery terminal before checking the circuit.