sensor INFINITI QX4 2005 Factory Service Manual

LAN-136
[CAN]
CAN SYSTEM (TYPE 4)
Revision: October 20052005 QX56
CHECK SHEET RESULTS (EXAMPLE)
NOTE:
If “NG” is displayed on “INITIAL DIAG (Initial diagnosis)” or “CAN COMM” for the diagnosed control unit,
replace the control unit.
Case 1
Check harness between TCM and ICC sensor. Refer to LAN-156, "Circuit Check Between TCM and ICC Sen-
sor" .
SKIB3383E
PKIA8818E

CAN SYSTEM (TYPE 4)
LAN-137
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
Case 2
Check harness between ICC sensor and ICC unit. Refer to LAN-157, "Circuit Check Between ICC Sensor and
ICC Unit" .
SKIB3384E
PKIA8819E

CAN SYSTEM (TYPE 4)
LAN-143
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
Case 8
Check ICC sensor circuit. Refer to LAN-161, "ICC Sensor Circuit Check" .
SKIB3390E
PKIA8825E

LAN-150
[CAN]
CAN SYSTEM (TYPE 4)
Revision: October 20052005 QX56
Case 15
Check steering angle sensor circuit. Refer to LAN-164, "Steering Angle Sensor Circuit Check" .
SKIB3397E
PKIA8832E

LAN-156
[CAN]
CAN SYSTEM (TYPE 4)
Revision: October 20052005 QX56
Case 22
Check IPDM E/R ignition relay circuit continuously sticks “ON”. Refer to LAN-167, "IPDM E/R Ignition Relay
Circuit Check" .
Circuit Check Between TCM and ICC SensorUKS001NU
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check following terminals and connectors for damage, bend and loose connection (connector side and
harness side).
–Harness connector F33
–Harness connector E19
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect A/T assembly connector and harness connector F33.
2. Check continuity between A/T assembly harness connector F9
terminals 3 (L), 8 (P) and harness connector F33 terminals 12
(L), 11 (P).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
SKIB3404E
3 (L) - 12 (L) : Continuity should exist.
8 (P) - 11 (P) : Continuity should exist.
PKIA6831E

CAN SYSTEM (TYPE 4)
LAN-157
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC sensor connector.
2. Check continuity between harness connector E19 terminals 12
(L), 11 (P) and ICC sensor connector E42 terminals 2 (L), 3 (P).
OK or NG
OK >> Connect all connectors and diagnose again. Refer to
LAN-131, "
Work Flow" .
NG >> Repair harness.
Circuit Check Between ICC Sensor and ICC UnitUKS001PS
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check following terminals and connectors for damage, bend and loose connection (connector side and
harness side).
–Harness connector E34
–Harness connector B40
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC sensor connector and harness connector E34.
2. Check continuity between ICC sensor connector E42 terminals
2 (L), 3 (P) and harness connector E34 terminals 24 (L), 23 (P).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC unit connector.
2. Check continuity between harness connector B40 terminals 24
(L), 23 (P) and ICC unit connector B13 terminals 14 (L), 5 (P).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to
LAN-131, "
Work Flow" .
NG >> Repair harness.12 (L) - 2 (L) : Continuity should exist.
11 (P) - 3 (P) : Continuity should exist.
PKIA8171E
2 (L) - 24 (L) : Continuity should exist.
3 (P) - 23 (P) : Continuity should exist.
PKIA8137E
24 (L) - 14 (L) : Continuity should exist.
23 (P) - 5 (P) : Continuity should exist.
PKIA8138E

CAN SYSTEM (TYPE 4)
LAN-161
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
ICC Sensor Circuit CheckUKS001PU
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check terminals and connector of ICC sensor for damage, bend and loose connection (sensor side and
harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC sensor connector.
2. Check resistance between ICC sensor harness connector E42
terminals 2 (L) and 3 (P).
OK or NG
OK >> Replace ICC sensor.
NG >> Repair harness between ICC sensor and harness con-
nector E34.
ICC Unit Circuit CheckUKS001PV
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check terminals and connector of ICC unit for damage, bend and loose connection (control unit side and
harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC unit connector.
2. Check resistance between ICC unit harness connector B13 ter-
minals 14 (L) and 5 (P).
OK or NG
OK >> Replace ICC unit.
NG >> Repair harness between ICC unit and harness connec-
tor B69. 2 (L) - 3 (P) : Approx. 54 - 66 Ω
PKIA8172E
14 (L) - 5 (P) : Approx. 54 - 66 Ω
SKIA6886E

LAN-164
[CAN]
CAN SYSTEM (TYPE 4)
Revision: October 20052005 QX56
Data Link Connector Circuit CheckUKS001O3
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check terminals and connector of data link connector for damage, bend and loose connection (connector
side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
Check resistance between data link connector M22 terminals 6 (L)
and 14 (P).
OK or NG
OK >> Diagnose again. Refer to LAN-131, "Work Flow" .
NG >> Repair harness between data link connector and combi-
nation meter.
Steering Angle Sensor Circuit CheckUKS001O4
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check terminals and connector of steering angle sensor for damage, bend and loose connection (sensor
side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect steering angle sensor connector.
2. Check resistance between steering angle sensor harness con-
nector M47 terminals 3 (L) and 4 (P).
OK or NG
OK >> Replace steering angle sensor.
NG >> Repair harness between steering angle sensor and data
link connector. 6 (L) - 14 (P) : Approx. 54 - 66 Ω
PKIA2077E
3 (L) - 4 (P) : Approx. 54 - 66 Ω
PKIA6838E

CAN SYSTEM (TYPE 4)
LAN-167
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
CAN Communication Circuit CheckUKS001O9
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Disconnect the following module and control unit connectors and check terminals for deformation, discon-
nection, looseness or damage.
–ECM
–A/T assembly
–ICC sensor
–ICC unit
–Driver seat control unit
–Combination meter
–Display control unit
–BCM
–Steering angle sensor
–Front air control
–Transfer control unit
–ABS actuator and electric unit (control unit)
–IPDM E/R
OK or NG
OK >> GO TO 2.
NG >> Repair or replace as necessary.
2. CHECK HARNESS FOR SHORT CIRCUIT
With all module and control unit connectors disconnected, check
continuity between data link connector M22 terminals 6 (L) and 14
(P).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
3. CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between data link connector M22 terminals 6 (L),
14 (P) and ground.
OK or NG
OK >> Check ECM and IPDM E/R. Refer to LAN-168, "ECM/
IPDM E/R INTERNAL CIRCUIT INSPECTION" .
NG >> Repair harness.
IPDM E/R Ignition Relay Circuit CheckUKS001OA
Check the following. If no malfunction is found, replace the IPDM E/R.

IPDM E/R power supply circuit. Refer to PG-26, "IPDM E/R Power/Ground Circuit Inspection" . 6 (L) - 14 (P) : Continuity should not exist.
PKIA2077E
6 (L) - Ground : Continuity should not exist.
14 (P) - Ground : Continuity should not exist.
PKIA2079E

LT-2Revision: October 20052005 QX56 COMBINATION SWITCH READING FUNCTION ... 48
EXTERIOR LAMP BATTERY SAVER CONTROL ... 48
DELAY TIMER FUNCTION ................................. 48
CAN Communication System Description .............. 48
Major Components and Functions .......................... 48
Schematic ............................................................... 49
Wiring Diagram — AUTO/L — ................................ 50
Terminals and Reference Values for BCM .............. 53
Terminals and Reference Values for IPDM E/R ...... 54
How to Proceed With Trouble Diagnosis ................ 55
Preliminary Check .................................................. 55
SETTING CHANGE FUNCTIONS ....................... 55
CHECK POWER SUPPLY AND GROUND CIR-
CUIT .................................................................... 55
CONSULT-II Function (BCM) .................................. 57
CONSULT-II OPERATION ................................... 57
WORK SUPPORT ............................................... 58
DATA MONITOR .................................................. 58
ACTIVE TEST ..................................................... 59
SELF-DIAGNOSTIC RESULTS ........................... 59
CONSULT-II Function (IPDM E/R) .......................... 60
CONSULT-II OPERATION ................................... 60
DATA MONITOR .................................................. 61
ACTIVE TEST ..................................................... 61
Trouble Diagnosis Chart by Symptom .................... 62
Lighting Switch Inspection ...................................... 62
Optical Sensor System Inspection .......................... 63
Removal and Installation of Optical Sensor ............ 64
REMOVAL ........................................................... 64
INSTALLATION .................................................... 64
HEADLAMP AIMING CONTROL .............................. 65
System Description ................................................. 65
Wiring Diagram — H/AIM — ................................... 66
Removal and Installation of Headlamp Aiming
Switch ..................................................................... 68
REMOVAL ........................................................... 68
INSTALLATION ................................................... 68
Switch Circuit Inspection ........................................ 68
FRONT FOG LAMP .................................................. 69
Component Parts and Harness Connector Location ... 69
System Description ................................................. 69
OUTLINE ............................................................. 69
COMBINATION SWITCH READING FUNCTION ... 70
EXTERIOR LAMP BATTERY SAVER CONTROL ... 70
CAN Communication System Description .............. 70
Wiring Diagram — F/FOG — .................................. 71
Terminals and Reference Values for BCM .............. 73
Terminals and Reference Values for IPDM E/R ...... 74
How to Proceed With Trouble Diagnosis ................ 74
Preliminary Check .................................................. 75
CHECK POWER SUPPLY AND GROUND CIR-
CUIT .................................................................... 75
CONSULT-II Functions ........................................... 76
Front Fog Lamps Do Not Illuminate (Both Sides) ... 76
Front Fog Lamp Does Not Illuminate (One Side) ... 77
Aiming Adjustment .................................................. 78
Bulb Replacement .................................................. 79
Removal and Installation ........................................ 79
TURN SIGNAL AND HAZARD WARNING LAMPS ... 80Component Parts and Harness Connector Location ...80
System Description .................................................80
OUTLINE .............................................................80
TURN SIGNAL OPERATION ...............................80
HAZARD LAMP OPERATION .............................81
REMOTE KEYLESS ENTRY SYSTEM OPERA-
TION ....................................................................82
COMBINATION SWITCH READING FUNCTION ...82
CAN Communication System Description ..............82
Wiring Diagram — TURN — ...................................83
Terminals and Reference Values for BCM ..............85
How to Proceed With Trouble Diagnosis ................86
Preliminary Check ...................................................87
CHECK POWER SUPPLY AND GROUND CIR-
CUIT .....................................................................87
CONSULT-II Function (BCM) ..................................88
CONSULT-II OPERATION ...................................88
DATA MONITOR ..................................................89
ACTIVE TEST ......................................................89
Turn Signal Lamp Does Not Operate ......................90
Rear Turn Signal Lamp Does Not Operate .............91
Hazard Warning Lamp Does Not Operate But Turn
Signal Lamps Operate ............................................92
Turn Signal Indicator Lamp Does Not Operate .......93
Bulb Replacement (Front Turn Signal Lamp) ..........94
Bulb Replacement (Rear Turn Signal Lamp) ..........94
Removal and Installation of Front Turn Signal Lamp ...94
Removal and Installation of Rear Turn Signal Lamp ...94
LIGHTING AND TURN SIGNAL SWITCH ................95
Removal and Installation .........................................95
REMOVAL ............................................................95
INSTALLATION ....................................................95
HAZARD SWITCH .....................................................96
Removal and Installation .........................................96
REMOVAL ............................................................96
INSTALLATION ....................................................96
COMBINATION SWITCH ..........................................97
Wiring Diagram — COMBSW — ............................97
Combination Switch Reading Function ...................98
CONSULT-II Function (BCM) ..................................98
CONSULT-II OPERATION ...................................98
DATA MONITOR ..................................................99
Combination Switch Inspection ............................. 100
Removal and Installation ....................................... 102
Switch Circuit Inspection ....................................... 102
STOP LAMP ............................................................ 103
System Description ............................................... 103
Wiring Diagram — STOP/L — .............................. 104
High-Mounted Stop Lamp ..................................... 105
BULB REPLACEMENT ...................................... 105
REMOVAL AND INSTALLATION ....................... 105
Stop Lamp ............................................................. 105
BULB REPLACEMENT ...................................... 105
REMOVAL AND INSTALLATION ....................... 105
BACK-UP LAMP ..................................................... 106
Wiring Diagram — BACK/L — .............................. 106
Bulb Replacement ................................................. 107
Removal and Installation ....................................... 107
PARKING, LICENSE PLATE AND TAIL LAMPS .... 108