steering INFINITI QX4 2005 Factory Service Manual
[x] Cancel search | Manufacturer: INFINITI, Model Year: 2005, Model line: QX4, Model: INFINITI QX4 2005Pages: 3419, PDF Size: 80.18 MB
Page 2143 of 3419
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TOW TRUCK TOWING
Revision: October 20052005 QX56
TOW TRUCK TOWINGPFP:00000
To w Tr u c k To w i n gEAS001FY
WAR NIN G:
Never get under the vehicle while it is supported only by the jack. Always use safety stands to
support the frame when you have to get under the vehicle.
Place wheel chocks at both front and back of the wheels on the ground.
CAUTION:
All applicable State or Provincial (in Canada) laws and local laws regarding the towing operation
must be obeyed.
It is necessary to use proper towing equipment to avoid possible damage during towing opera-
tion. Towing is in accordance with Towing Procedure Manual at dealer.
Always attach safety chains before towing.
When towing, make sure that the transmission, steering system and powertrain are in good order.
If any unit is damaged, dollies must be used.
Never tow an automatic transmission model from the rear
(i.e., backward) with four wheels on the ground as this may
cause serious and expensive damage to the transmission.
2WD MODELS
NISSAN does not recommend towing automatic transmission
equipped vehicles with the drive wheels on the ground.
CAUTION:
When towing with the front wheels on the ground: Turn the
ignition key to the OFF position and move the transmission
selector lever to N (neutral) position, turn the ignition key to
OFF position and secure the steering wheel in a straight
ahead position with a rope or similar device. Never place
the ignition key in the LOCK position. This will result in
damage to the steering lock mechanism.
WAIA0030E
WAIA0031E
Page 2144 of 3419
TOW TRUCK TOWING
GI-43
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Revision: October 20052005 QX56
4WD MODELS
NISSAN does not recommend towing automatic transmission
equipped vehicles with the drive wheels on the ground.
CAUTION:
When towing with the front wheels on the ground or rear
wheels on the ground (If you do not use towing dollies): Set
the free-running hubs to the free position and move the
transfer case shift lever into the “2H” position.
When towing with the front on the ground: Turn the ignition
key to the OFF position and secure the steering wheel in a
straight ahead position with a rope or similar device. Never
place the ignition key in the LOCK position. This will result
in damage to the steering lock mechanism.
Towing Point
CAUTION:
Never tow the vehicle using only the towing points. To avoid
damaging the vehicle body, use proper towing equipment when
towing.
Vehicle Recovery (Freeing a stuck vehicle)EAS001FZ
Tow chains or cables must be attached only to the main structural members of the vehicle or the
towing hooks (if so equipped). Otherwise, the vehicle body will be damaged.
Use the towing hook (if so equipped) only to free a vehicle stuck in sand, snow, mud, etc. Never
tow the vehicle for a long distance using only the towing hook.
The towing hook is under tremendous force when used to free a stuck vehicle. Never pull the hook
at an angle.
Always pull the cable straight out from the front or rear of the vehicle.
Pulling devices should be routed so they do not touch any part of the suspension, steering, brake,
or cooling systems.
Pulling devices such as ropes or canvas straps are not recommended for use in vehicle towing or
recovery.
WA RN ING:
Stand clear of a stuck vehicle.
Do not spin your tires at high speed. This could cause them to explode and result in serious injury.
Parts of your vehicle could also overheat and be damaged.
WAIA0032E
WAIA0055E
Page 2255 of 3419
IDX-2
ALPHABETICAL INDEX
Numerics
2-4WD shift solenoid valve ..... TF-94
, TF-152, TF-165
4WD - Wiring diagram ....................................... TF-24
4WD shift switch ................................................ TF-66
4WD solenoid valve ................ TF-90, TF-152, TF-165
4WD system description .................................... TF-15
4WD system diagram ........................................ TF-19
A
A/C air flow ...................................................... ATC-29
A/C compressor clutch removal and installation .. ATC-
180
A/C compressor mounting ............................. ATC-179
A/C compressor precaution ............................. ATC-11
A/C compressor special service tool ................ ATC-14
A/C control operation (auto A/C) ...................... ATC-26
A/C diagnostic work flow (auto A/C) .............. ATC-132
A/C evaporator ............................................... ATC-186
A/C HFC134a (R134a) system identification ..... ATC-7
A/C HFC134a (R134a) system precaution ........ ATC-5
A/C HFC134a (R134a) system service procedure ATC-
175
A/C HFC134a (R134a) system service tools ... ATC-14
A/C HFC134a system service equipment precaution ...
ATC-11
A/C lubricant (R134a) ...................................... ATC-22
A/C lubrication oil ............................................. ATC-22
A/C operational check ....................... ATC-57, ATC-60
A/C self-diagnoses (auto A/C) ........ ATC-55, ATC-132
A/C service data specification ........................ ATC-193
A/C trouble diagnoses (auto A/C) .................... ATC-33
A/C, A - Wiring diagram ................................... ATC-43
A/T fluid checking ...................... AT-13, AT-50, MA-22
A/T fluid cooler cleaning .................................... AT-13
A/T fluid replacement ............................. AT-13, MA-24
A/T fluid temperature sensor ........................... AT-126
A/T IND - Wiring diagram .................................... DI-40
A/T indicator ........................................................ DI-40
A/T shift lock system ........................................ AT-222
A/T trouble diagnoses ........................................ AT-41
A/T Wiring diagram AT - CAN ............................ AT-96
A/T Wiring diagram AT - FTS .......................... AT-127
A/T Wiring diagram AT - MAIN ........................ AT-168
A/T Wiring diagram AT - NONDTC .................. AT-177
A/T Wiring diagram AT - PNP/SW ................... AT-105
A/T Wiring diagram AT - STSIG ...................... AT-100
A/T Wiring diagram AT - VSS A/T ................... AT-110
ABS - Wiring diagram ..................................... BRC-16
ABS (anti-lock brake system) ........................... BRC-7
Accelerator control system ............................... ACC-2
Accelerator pedal position (APP) sensor . EC-591, EC-
597, EC-611
Accelerator pedal released position learning ..... EC-90
AF1B1-Wiring diagram EC-461, EC-470, EC-479, EC-
489, EC-500, EC-510, EC-522
AF1B2-Wiring diagram EC-463, EC-472, EC-481, EC-
491, EC-502, EC-512, EC-524
AF1HB1-Wiring diagram ................................. EC-387
AF1HB2-Wiring diagram ................................. EC-389
Aiming adjustment .................................. LT-30, LT-78
Air bag ............................................................... SRS-3
Air cleaner and air duct ..................................... EM-14
Air cleaner filter replacement ............................ MA-16
Air conditioner cut control ................................. EC-28
Air flow meter - See Mass air flow sensor EC-174, EC-
183
Air fuel ratio sensor 1 .. EC-459, EC-468, EC-477, EC-
487, EC-497, EC-507, EC-519
Air fuel ratio sensor 1 heater ........................... EC-386
Air mix. door motor .......................................... ATC-70
Ambient sensor ............................. ATC-137, ATC-148
Angular tightening application ............................. EM-3
APPS1 - Wiring diagram ................................. EC-593
APPS2 - Wiring diagram ................................. EC-599
APPS3 - Wiring diagram ................................. EC-613
ASC/BS - Wiring diagram ............................... EC-571
ASC/SW - Wiring diagram .............................. EC-554
ASCBOF - Wiring diagram .............................. EC-658
ASCD ................................................................ EC-29
ASCD (automatic speed control device) ........... ACS-3
ASCD brake switch ........................... EC-569, EC-657
ASCD indicator lamp ....................................... EC-664
ASCD steering switch ..................................... EC-552
ASCIND - Wiring diagram ............................... EC-665
ATP switch ............................ TF-107, TF-110, TF-115
AUDIO - Wiring diagram .................................... AV-10
AUT/DP - Wiring diagram .................................. SE-20
Auto air conditioner - Wiring diagram .............. ATC-43
Auto anti-dazzling inside mirror ........... GW-75, GW-76
Autolamp ............................................................ LT-47
Automatic amplifier ......................................... ATC-61
Automatic drive positioner .................................. SE-11
Automatic transmission number .......................... GI-48
AV and NAVI control unit ................................... AV-63
AV communication line ...................................... AV-87
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Back door ........................................................... BL-99
Back door trim ..................................................... EI-32
Back sonar .......................................................... DI-58
BACK/L - Wiring diagram ................................. LT-106
Back-up lamp ................................................... LT-106
Ball joint (front) ................................................ FSU-15
Basic inspection ................................................ EC-72
Battery ................................................................. SC-4
Battery/Starting/Charging System Tester SC-6, SC-12,
SC-19
BCM (Body control module) .............................. BCS-3
Block heater ...................................................... EM-73
Blower motor ................................... ATC-93, ATC-152
Body alignment ................................................ BL-172
Body component parts ..................................... BL-161
Body construction ............................................ BL-171
Body exterior paint color .................................. BL-160
Body mounting ................................................. BL-159
Page 2259 of 3419
IDX-6
ALPHABETICAL INDEX
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MAFS - Wiring diagram ..................... EC-177
, EC-185
Magnet clutch ............................... ATC-115, ATC-180
MAIN - Wiring diagram .................................... EC-157
Main oil pump (Transfer) ..................... TF-152, TF-165
Mainshaft (Transfer) ........................... TF-152, TF-165
Maintenance (engine)Schedule 1 ....................... MA-7
Maintenance (engine)Schedule 2 ....................... MA-9
Major overhaul (Final drive) .............. FFD-13, RFD-14
Major overhaul (Transfer) ................................ TF-144
Malfunction indicator lamp (MIL) ........................ EC-64
Map lamp .......................................................... LT-130
Mass air flow sensor (MAFS) ............. EC-174, EC-183
Meter ..................................................................... DI-5
METER - Wiring diagram .................................... DI-10
MIL data link connectors circuit ....................... EC-667
MIL/DL - Wiring diagram .................................. EC-667
Misfire .............................................................. EC-271
Mode door control linkage adjustment ............. ATC-66
Mode door motor ............................ ATC-64, ATC-165
Model variation ................................................... GI-46
Multiport fuel injection (MFI) system .................. EC-24
Multiport fuel injection precautions ....................... GI-6
Multi-remote control system - See Remote keyless entry
system ............................................................... BL-44
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NATS - Wiring diagram .................................... BL-140
NAVI - Wiring diagram ....................................... AV-79
NAVI Control Unit ............................................ AV-157
Neutral-4LO switch ............................................ TF-62
NVH troubleshooting (AX) ................................. FAX-4
NVH troubleshooting (EM) .................................. EM-9
NVH troubleshooting (Final drive) ..................... RFD-5
NVH troubleshooting (Propeller shaft) ................. PR-3
NVH troubleshooting (RAX) .............................. RAX-4
NVH troubleshooting (RSU) .............................. RSU-5
NVH troubleshooting (ST) .................................... PS-5
NVH troubleshooting (Transfer) ......................... TF-10
NVH troubleshooting (WT)NVH troubleshooting (WT) .
WT-4
NVIS (Nissan vehicle immobilizer system) precautions
GI-3
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O2H2B1 - Wiring diagram ................................ EC-168
O2H2B2 - Wiring diagram ................................ EC-170
O2S2B1 - Wiring diagram .. EC-218, EC-228, EC-418,
EC-429
O2S2B2 - Wiring diagram .. EC-220, EC-230, EC-420,
EC-431
Oil cooler (engine) ............................................. LU-11
Oil filter ............................................................... LU-10
Oil filter (Transfer) ............................................ TF-141
Oil pan (engine) ................................................ EM-22
Oil pressure (engine) ........................................... LU-7
Oil pressure relief valve (engine) ......................... LU-5
Oil pump (engine) .............................................. LU-13
Oil seal replacement (engine) ........................... EM-55
Oil seal replacement (front of final drive) FFD-7, RFD-6
Oil seal replacement (side of final drive) FFD-9, RFD-8
On board diagnostic system ............................. EC-48
ORVR (On-board Refueling Vapor Recovery) .. EC-39
Overheat ......................................................... EC-440
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P/SCKT - Wiring diagram ................................. WW-56
Pantograph jack .................................................. GI-40
Park/Neutral position switch ............................ EC-581
Park/neutral position switch (A/T) .................... AT-104
Parking brake control ........................................... PB-4
PCV (positive crankcase ventilation) ................ EC-45
Periodic maintenance ......................................... MA-7
Personal lamp .................................................. LT-130
PGC/V - Wiring diagram ................... EC-320, EC-533
PHASE - Wiring diagram ................................ EC-291
Pinion bearing preload diff. ............................. RFD-22
Piston pin inspection ......................................... EM-89
Piston ring inspection ........................................ EM-90
Piston to bore clearance ................................... EM-94
Planetary carrier (Transfer) ................. TF-147, TF-174
PNP/SW - Wiring diagram .............................. EC-583
POS - Wiring diagram ..................................... EC-286
POWER - Wiring diagram ................................... PG-6
Power door lock ................................................. BL-16
Power seat ......................................................... SE-89
Power steering fluid level .................................. MA-29
Power steering gear ........................................... PS-15
Power steering oil pump .................................... PS-26
Power steering pressure (PSP) sensor ........... EC-378
Power steering system bleeding .......................... PS-6
Power supply routing .......................................... PG-4
Power window .................................................. GW-15
PRE/SE - Wiring diagram ................. EC-337, EC-343
Precautions (General) ........................................... GI-4
Precautions in repairing high strength steel ..... BL-190
Pressure switch 1 ............................... AT-146, AT-160
Pressure switch 2 ............................................. AT-158
Pressure switch 3 ............................... AT-142, AT-162
Pressure switch 5 ............................... AT-150, AT-164
Pressure switch 6 ............................... AT-154, AT-166
Pressure test (A/T) ............................................. AT-51
Propeller shaft ........................................... PR-4, PR-8
Propeller shaft inspection .................................. MA-25
Propeller shaft on vehicle service ....................... PR-8
Propeller shaft vibration ............................ PR-4, PR-8
PS/SEN - Wiring diagram ............................... EC-379
R
R/VIEW - Wiring diagram .................................... DI-74
Radiator ............................................................ CO-12
Rear Audio Remote Control Unit ....................... AV-47
Rear axle ........................................................... RAX-5
Page 2260 of 3419
IDX-7
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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
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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
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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
Page 2272 of 3419
INSTRUMENT PANEL ASSEMBLY
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Revision: October 20052005 QX56
1. Remove instrument lower cover LH. Refer to IP-13, "Instrument Lower Cover LH" .
2. Remove glove box assembly.
3. Remove center console lower covers.
4. Remove shift knob and A/T finisher. Refer to IP-13, "
A/T Finisher" .
Disconnect harness from bottom of A/T finisher.
5. Remove control device. Refer to AT-227, "
Control Device Removal and Installation" .
6. Remove center console and disconnect harness.
7. Remove cluster lid C and disconnect harnesses.
8. Remove cluster lid D and disconnect harness.
9. Remove display assembly and the audio unit. Refer to AV-45, "
Removal and Installation for Audio Unit"
and AV- 1 5 8 , "Removal and Installation of Display Unit" .
10. Remove power point assemblies.
11. Remove front passenger air bag status light.
12. Remove hazard switch.
13. Remove clock.
14. Remove combination meter cover.
15. Remove cluster lid A and disconnect harness.
16. Remove combination meter and disconnect harness.
17. Remove lower knee protector LH.
18. Remove the upper and lower steering column covers.
Disconnect harness from ADP steering switch.
19. Remove defrost grille and disconnect optical sensor harness.
20. Remove side ventilator assembly LH.
21. Remove side ventilator assembly RH.
22. Remove instrument panel.
Remove passenger air bag nuts and remove air bag. Refer to SRS-51, "FRONT PASSENGER AIR
BAG MODULE" .
Disconnect GPS antenna.
Disconnect harnesses to instrument panel speakers LH and RH and remove speakers.
Disconnect all remaining harnesses.
Installation is in the reverse order of removal.
1. Steering member brackets 2. Bracket assembly LH 3. Steering member assembly
4. Combination meter cover 5. Defrost grille 6. Instrument panel speaker LH
7. Instrument panel 8. Bin mat 9. Side ventilator assembly LH
10. Instrument lower cover LH 11. Lower knee protector LH 12. Steering column cover upper
13. Steering column cover lower 14. Center console lower cover LH 15. Combination meter
16. Audio unit bracket LH 17. Driver instrument stay 18. Audio unit
19. Passenger instrument stay 20. Display assembly 21. Switch assembly
22. Cluster lid A 23. Cluster lid D ventilator LH 24. Front passenger air bag status light
25. Power point assemblies 26. Clock 27. Cluster lid C
28. Front air control 29. Audio control 30. Hazard switch
31. Cluster lid D ventilator RH 32. Cluster lid D 33. Glove box door
34. Glove box assembly 35. Glove box housing 36. Glove box striker
37. Rubber bumpers 38. Glove box damper 39. Audio unit bracket RH
40. Center console lower cover RH 41. Fuse block cover 42. Side ventilator assembly RH
43. Instrument panel bracket 44. Instrument panel speaker RH 45. Bracket assembly RH
46. Key cylinder escutcheon 47. Instrument lower cover RH
Page 2280 of 3419
LAN-1
LAN SYSTEM
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CONTENTS
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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
Page 2281 of 3419
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
Page 2286 of 3419
![INFINITI QX4 2005 Factory Service Manual CAN COMMUNICATION
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Fuel level sensor signal R T
Fuel level low warning signal T R
ASCD SET lamp signal T R
ASCD CRUISE lamp signal](/img/42/57035/w960_57035-2285.png "INFINITI QX4 2005 Factory Service Manual CAN COMMUNICATION
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Fuel level sensor signal R T
Fuel level low warning signal T R
ASCD SET lamp signal T R
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CAN COMMUNICATION
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Fuel level sensor signal R T
Fuel level low warning signal T R
ASCD SET lamp signal T R
ASCD CRUISE lamp signal T R
Malfunction indicator lamp signal T R
Front wiper request signal T R
Front wiper stop position signal R T
Rear window defogger switch signal T R R
Rear window defogger control signal R R R T
Hood switch signalRT
Theft warning horn request signal T R
Horn chirp signalTR
Steering angle sensor signalTR
ABS warning lamp signal R T
VDC OFF indicator lamp signal R T
SLIP indicator lamp signal R T
Brake warning lamp signal R T
System setting signalRT
TR
Distance to empty signal T R
ASCD operation signal T R
ASCD OD cancel request T R
A/T CHECK indicator lamp signal T R
A/T position indicator lamp signal T R
Tire pressure signal R T
Tire pressure data signal R T
1st position switch signal R T
4th position switch signal R T
Tow mode switch signal R T
A/T fluid temperature sensor signal T RSignals ECM TCMDriver
seat
con-
trol
unitCom-
bina-
tion
meterDis-
play
con-
trol
unitBCMStee r-
ing
angle
sensorFront
air
control ABS
actua-
tor and
elec-
tric unit
(con-
trol
unit)IPDM
E/R
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A/C switch/indicator signalTR
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Cooling fan speed request signal T R R
Position light request signal R T R
Low](/img/42/57035/w960_57035-2287.png "INFINITI QX4 2005 Factory Service Manual CAN COMMUNICATION
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A/C switch/indicator signalTR
RT
Cooling fan speed request signal T R R
Position light request signal R T R
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CAN COMMUNICATION
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A/C switch/indicator signalTR
RT
Cooling fan speed request signal T R R
Position light request signal R T R
Low beam request signalTR
Low beam status signal RT
High beam request signal R T R
High beam status signal RT
Front fog light request signal T R
Day time running light request signal T R
Vehicle speed signalRRT
RR R R T R R R
Sleep wake up signal R T R
Door switch signal R R R T R
Turn indicator signal R T
Key fob ID signal R T
Key fob door unlock signal R T
Buzzer output signalRT
TR
Fuel level sensor signal R T
Fuel level low warning signal T R
Malfunction indicator lamp signal T R
Front wiper request signal R T R
Front wiper stop position signal R T
Rear window defogger switch signal T R R
Rear window defogger control signal R R T
Hood switch signalRT
Theft warning horn request signal T R
Horn chirp signalTR
Steering angle sensor signalTR
ABS warning lamp signal R T
VDC OFF indicator lamp signal R R T
SLIP indicator lamp signal R T
Brake warning lamp signal R T
VDC operation signal R T
ABS malfunction signal R T
TCS malfunction signal R T
VDC malfunction signal R TSignals ECM TCMICC
sen-
sorICC
unitDriver
seat
con-
trol
unitCom-
bina-
tion
mete
rDis-
play
con-
trol
unitBCMSteer-
ing
angle
sensorFront
air
con-
trol ABS
actu-
ator
and
elec-
tric
unit
(con-
trol
unit)IPD
M E/
R