wiring INFINITI QX4 2005 Factory Service Manual

IDX-7
A
C
D
E
F
G
H
I
J
K
L B
IDX
ALPHABETICAL INDEX
Rear bumper ....................................................... EI-15
Rear case (Transfer) .......................... TF-146, TF-179
Rear combination lamp removal and installation ... LT-
122
Rear cover packing replacement diff. .............. RFD-24
Rear door ........................................... BL-128, GW-71
Rear seat ......................................................... SE-104
Rear seat belt ...................................................... SB-6
Rear suspension ............................................. RSU-25
Rear view monitor ............................................... DI-71
Rear washer .................................................... WW-35
Rear window defogger ..................................... GW-77
Rear wiper ....................................................... WW-35
Refrigerant connection precaution .................... ATC-7
Refrigerant discharging evacuating charging ATC-175
Refrigerant general precaution .......................... ATC-6
Refrigerant lines ........... ATC-175, ATC-183, ATC-184
Refrigerant pressure sensor ............ EC-643, ATC-185
Relay box .......................................................... PG-78
Remote keyless entry system ............................ BL-44
Removal and installation (A/T) ........... AT-244, AT-247
Removal and installation (Transfer) ................. TF-143
Revolution sensor (A/T) ................................... AT-108
Ring gear diff. inspection ................................. RFD-13
Road wheel size ................................................. GI-49
Rocker cover ..................................................... EM-33
Room lamp ....................................................... LT-129
Room lamp - See Interior lamp ........................ LT-129
ROOM/L - Wiring diagram ................................ LT-135
RP/SEN - Wiring diagram ............................... EC-644
S
SAE J1979 - Service $01 - 09 ........................... EC-48
Seat belt inspection ............................... SB-10, MA-32
Seat belt pre-tensioner .................................... SRS-58
Seat belt, front ..................................................... SB-3
Seat belt, rear ...................................................... SB-6
Seat, front .......................................................... SE-97
Seat, rear ........................................................ SE-104
Self-diagnosis (Transfer) .................................... TF-50
SEN/PW - Wiring diagram ............................... EC-455
SHIFT - Wiring diagram ................................... AT-223
Shift control (Transfer) ....................... TF-147, TF-174
Shift lock system .............................................. AT-222
Shock absorber (front) .................................... FSU-10
Shock absorber (rear) ..................................... RSU-34
Side air bag (satellite) sensor .......................... SRS-57
Side bearing preload diff. ................................ RFD-19
Side curtain air bag ......................................... SRS-54
Side trim .............................................................. EI-35
SMJ (super multiple junction) ............................ PG-74
SONAR - Wiring diagram .................................... DI-61
Spare tire size .................................................... GI-49
Spark plug ......................................................... EM-27
Spark plug replacement .................................... MA-18
Specification value .......................................... EC-146
Speedometer ......................................................... DI-5
Spiral cable ..................................................... SRS-48
SROOF - Wiring diagram .................................. RF-13
SRS - See Supplemental Restraint System ...... SRS-5
SRS - Wiring diagram ...................................... SRS-12
SRS Trouble diagnoses ..................................... SRS-8
Stabilizer bar (front) ......................................... FSU-12
Stabilizer bar (rear) ......................................... RSU-41
Stall test (A/T) .................................................... AT-50
Standardized relay ............................................. PG-72
START - Wiring diagram ................................... SC-11
Starting system .................................................. SC-10
Steering gear, linkage and transfer gear inspection .....
MA-29
Steering linkage ................................................. PS-15
Steering wheel and column ................................. PS-7
Step lamp ......................................................... LT-130
Stop lamp ......................................................... LT-103
Stop lamp switch ................. EC-569, EC-586, EC-657
STOP/L - Wiring diagram ................................. LT-104
Strut (front) ...................................................... FSU-10
Sub-oil pump (Transfer) ...................... TF-152, TF-165
Sun gear (Transfer) ............................ TF-147, TF-174
Sun roof, electric ................................................ RF-10
Sunload sensor .............................................. ATC-143
Sunroof .............................................................. RF-23
Supplemental Restraint System ........................ SRS-5
Supplemental restraint system - Wiring diagram . SRS-
12
Symbols and abbreviations ..................... GI-10, GI-22
Symptom matrix chart ...................................... EC-104
System readiness test (SRT) code .................... EC-54
T
Tachometer .......................................................... DI-5
Tail lamp ........................................................... LT-108
TAIL/L - Wiring diagram .................................... LT-110
TCM circuit diagram .......................................... AT-49
TCM inspection table ......................................... AT-82
TCS - Wiring diagram ..................................... BRC-16
TCS (traction control system) ........................... BRC-7
TCS component parts and connector location BRC-14
TCS wheel sensors ........................................ BRC-14
Theft warning system - See Vehicle security (Theft warn-
ing) system ......................................................... BL-75
Thermometer ...................................................... DI-26
Three way catalyst ............................................. EM-19
Three way catalyst function (Bank 1) .............. EC-298
Three way catalyst function (Bank 2) .............. EC-298
Three way catalyst precautions ............................ GI-5
Throttle control motor ...................................... EC-410
Throttle control motor relay .............................. EC-405
Throttle position sensor (TPS) ... EC-201, EC-264, EC-
450, EC-452, EC-604
Throttle valve closed position learning .............. EC-90
Tie-rod ............................................................... PS-15
Timing chain ...................................................... EM-35
Tire rotation ....................................................... MA-28
Tire size .............................................................. GI-49
Tooth contact diff. ............................................ RFD-20

IDX-8
ALPHABETICAL INDEX
Torque converter installation AT-245, AT-246, AT-248,
AT-249
Torque convertor clutch solenoid valve ... AT-115, AT-
117
Tow truck towing ................................................. GI-42
Towing point ....................................................... GI-43
TPS1 - Wiring diagram .................................... EC-266
TPS2 - Wiring diagram .................................... EC-203
TPS3 - Wiring diagram .................................... EC-606
Traction control system - Wiring diagram ....... BRC-16
Transfer control device ............. TF-76, TF-80, TF-138
Transfer control unit inspection table ................. TF-36
Transfer dropping resistor .................................. TF-90
Transfer fluid temperature sensor TF-104, TF-152, TF-
165
Transfer motor .................................... TF-102, TF-140
Transfer motor relay ........................................ TF-102
Transfer oil replacement ................................... MA-24
Transfer serial number ........................................ GI-48
Transmission serial number ................................ GI-48
Tread-FR&RR (Dimensions) ............................... GI-49
Trim ..................................................................... EI-35
TRNSCV - Wiring diagram .................. BL-140, BL-156
Trouble diagnoses .............................................. GI-11
Turbine revolution sensor ................................ AT-131
TURN - Wiring diagram ...................................... LT-83
Turn signal lamp ................................................. LT-80
Two trip detection logic ...................................... EC-48
Two-pole lift ........................................................ GI-41
V
Vacuum hose (brake system) ............................ BR-19
Vacuum hose drawing (Engine control) ........... EC-114
Valve clearance ................................................ EM-51
Valve guide ....................................................... EM-65
Vanity mirror lamp ............................................. LT-129
VDC (vehicle dynamics control) ........................ BRC-7
VDC -Wiring diagram ...................................... BRC-16
Vehicle identification number .............................. GI-47
Vehicle recovery (freeing a stuck vehicle) .......... GI-43
Vehicle security (theft warning) system ............. BL-75
Vehicle speed sensor (VSS) ............................ EC-372
VEHSEC - Wiring diagram ................................. BL-79
VENT/V - Wiring diagram .................. EC-327, EC-541
Video Monitor ..................................................... AV-60
VIN registration .................................................. EC-90
Viscosity number (SAE) .................................... MA-12
W
W/ANT - Wiring diagram .................................... AV-49
Wait detection switch ......................................... TF-69
WARN - Wiring diagram ..................................... DI-31
Warning chime .................................................... DI-42
Warning lamps .................................................... DI-30
Washer, front ..................................................... WW-4
Washer, rear .................................................... WW-35
Water pump ...................................................... CO-17
Water temperature gauge ..................................... DI-5
Wheel alignment (front) ..................................... FSU-6
Wheel alignment (rear) ................................... RSU-27
Wheel bearing (front) ........................................ FAX-5
Wheel bearing (rear) ......................................... RAX-5
Wheel hub (rear) ............................................... RAX-5
Wheel size .......................................................... GI-49
Wheelbase (Dimensions) .................................... GI-49
Width (Dimensions) ............................................. GI-49
WINDOW - Wiring diagram .............................. GW-22
Window, door ...................................... GW-68, GW-71
Windshield ....................................................... GW-11
WIP/R - Wiring diagram ................................... WW-39
WIPER - Wiring diagram .................................. WW-11
Wiper, front ........................................................ WW-4
Wiper, rear ....................................................... WW-35
Wiring Diagram (Cell code) list ......................... PG-60
Wiring diagrams .................................................. GI-15
WT-T/WARN - Wiring diagram .......................... WT-11

IP-2
PRECAUTIONS
Revision: October 20052005 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EIS004WW
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.
WAR NIN 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.

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 harness connec-
tors.

IP-6
SQUEAK AND RATTLE TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
73982-9E000: 45 mm (1.77 in) thick, 50 x 50 mm (1.97 x 1.97 in)/73982-50Y00: 10 mm (0.39 in) thick, 50 x 50
mm (1.97 x 1.97 in)
INSULATOR (Light foam block)
80845-71L00: 30 mm (1.18 in) thick, 30 x 50 mm (1.18 x 1.97 in)
FELT CLOTH TAPE
Used to insulate where movement does not occur. Ideal for instrument panel applications.
68370-4B000: 15 x 25 mm (0.59 x 0.98 in) pad/68239-13E00: 5 mm (0.20 in) wide tape roll
The following materials, not found in the kit, can also be used to repair squeaks and rattles.
UHMW (TEFLON) TAPE
Insulates where slight movement is present. Ideal for instrument panel applications.
SILICONE GREASE
Used in place of UHMW tape that will be visible or not fit.
Note: Will only last a few months.
SILICONE SPRAY
Use when grease cannot be applied.
DUCT TAPE
Use to eliminate movement.
CONFIRM THE REPAIR
Confirm that the cause of a noise is repaired by test driving the vehicle. Operate the vehicle under the same
conditions as when the noise originally occurred. Refer to the notes on the Diagnostic Worksheet.
Generic Squeak and Rattle TroubleshootingEIS0062R
Refer to Table of Contents for specific component removal and installation information.
INSTRUMENT PANEL
Most incidents are caused by contact and movement between:
1. The cluster lid A and instrument panel
2. Acrylic lens and combination meter housing
3. Instrument panel to front pillar garnish
4. Instrument panel to windshield
5. Instrument panel mounting pins
6. Wiring harnesses behind the combination meter
7. A/C defroster duct and duct joint
These incidents can usually be located by tapping or moving the components to duplicate the noise or by
pressing on the components while driving to stop the noise. Most of these incidents can be repaired by apply-
ing felt cloth tape or silicone spray (in hard to reach areas). Urethane pads can be used to insulate wiring har-
ness.
CAUTION:
Do not use silicone spray to isolate a squeak or rattle. If you saturate the area with silicone, you will
not be able to recheck the repair.
CENTER CONSOLE
Components to pay attention to include:
1. Shifter assembly cover to finisher
2. A/C control unit and cluster lid C
3. Wiring harnesses behind audio and A/C control unit
The instrument panel repair and isolation procedures also apply to the center console.
DOORS
Pay attention to the:
1. Finisher and inner panel making a slapping noise
2. Inside handle escutcheon to door finisher
3. Wiring harnesses tapping
4. Door striker out of alignment causing a popping noise on starts and stops

LAN-1
LAN SYSTEM
K ELECTRICAL
CONTENTS
C
D
E
F
G
H
I
J
L
M
SECTION LAN
A
B
LAN
Revision: October 20052005 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: October 20052005 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) ............ 136
Circuit Check Between TCM and ICC Sensor ...... 156
Circuit Check Between ICC Sensor and ICC Unit . 157
Circuit Check Between ICC Unit and Driver Seat
Control Unit ........................................................... 158
Circuit Check Between Driver Seat Control Unit and
Data Link Connector ............................................. 158
Circuit Check Between Data Link Connector and
IPDM E/R .............................................................. 159
ECM Circuit Check ................................................ 160
TCM Circuit Check ................................................ 160
ICC Sensor Circuit Check ..................................... 161
ICC Unit Circuit Check .......................................... 161
Driver Seat Control Unit Circuit Check .................. 162
Combination Meter Circuit Check ......................... 162
Display Control Unit Circuit Check ........................ 163
BCM Circuit Check ................................................ 163
Data Link Connector Circuit Check ....................... 164
Steering Angle Sensor Circuit Check .................... 164
Front Air Control Circuit Check ............................. 165
Transfer Control Unit Circuit Check ...................... 165
ABS Actuator and Electric Unit (Control Unit) Circuit
Check .................................................................... 166
IPDM E/R Circuit Check ........................................ 166
CAN Communication Circuit Check ...................... 167
IPDM E/R Ignition Relay Circuit Check ................. 167
Component Inspection .......................................... 168
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
TION .................................................................. 168

PRECAUTIONS
LAN-3
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 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.

CAN COMMUNICATION
LAN-5
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
CAN COMMUNICATIONPFP:23710
System DescriptionUKS000NU
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitUKS000NV
Go to CAN system, when selecting your CAN system type from the following table.
×: Applicable
NOTE:
Vehicles equipped with ICC can be identified by the presence of a ICC switch.
TYPE1
System diagram

Ty p e 1
Body typeWagon
Axle 2WD 4WD
EngineVK56DE
TransmissionA/T
Brake controlVDC
ICC system××
CAN system type 1234
CAN system trouble diagnosisLAN-16
LAN-50LAN-90LAN-126
BBIA0584E
PKIA8173E

LAN-16
[CAN]
CAN SYSTEM (TYPE 1)
Revision: October 20052005 QX56
CAN SYSTEM (TYPE 1)PFP:23710
System DescriptionUKS000P0
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
Component Parts and Harness Connector LocationUKS000P1
BKIA0118E

LAN-18
[CAN]
CAN SYSTEM (TYPE 1)
Revision: October 20052005 QX56
Wiring Diagram - CAN -UKS000P3
BKWA0395E