Air INFINITI QX56 2004 Factory Service Manual

AUTO LIGHT SYSTEM
LT-55
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
*1 USA
*2 Canada
How to Proceed With Trouble DiagnosisEKS007AW
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 4 8 , "
System Description" .
3. Carry out the Preliminary Check. Refer to LT- 5 5 , "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction. Refer to LT- 6 2 , "
Trouble Diagnosis Chart
by Symptom" .
5. Does the auto light system operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Preliminary CheckEKS007AX
SETTING CHANGE FUNCTIONS

Sensitivity of auto light system can be adjusted using CONSULT-II. Refer to LT-58, "WORK SUPPORT" .
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES OR FUSIBLE LINK
Check for blown fuses or fusible link.
Refer to LT- 5 0 , "
Wiring Diagram — AUTO/L —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
56L/W *1
Y *2Headlamp high (RH) ONLighting switch
HIGH or PASS
positionOFF 0V
ON Battery voltage
57 R/LParking, license, and tail
lampONLighting switch
1ST positionOFF 0V
ON Battery voltage
59 B Ground ON — 0V Terminal
No.Wire color Signal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
Unit Power source Fuse No.
BCMBattery f
Ignition switch ON or START position 59
IPDM E/R Battery34
35
37
40
41
53

AUTO LIGHT SYSTEM
LT-63
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
Optical Sensor System InspectionEKS007B2
1. CHECK OPTICAL SENSOR INPUT SIGNAL
With CONSULT-II
Select “BCM” on CONSULT-II. With “OPTICAL SENSOR” data mon-
itor, check difference in the voltage when the optical sensor is illumi-
nated and not illuminated.
NOTE:
Optical sensor must be completely subjected to work lamp light. If
the optical sensor is insufficiently illuminated, the measured value
may not satisfy the standard.
Without CONSULT-II
GO TO 2.
OK or NG
OK >> Inspection End.
NG >> GO TO 2.
2. CHECK OPTICAL SENSOR SIGNAL GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and optical sensor connector.
3. Check continuity (open circuit) between BCM harness connector
M18 terminal 18 (P) and optical sensor harness connector M402
terminal 3 (P).
4. Check continuity (short circuit) between BCM harness connector
M18 terminal 18 (P) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK OPTICAL SENSOR SIGNAL CIRCUIT
1. Check continuity (open circuit) between BCM harness connector
M20 terminal 58 (W/R) and optical sensor harness connector
M402 terminal 4 (W/R).
2. Check continuity (short circuit) between BCM harness connector
M20 terminal 58 (W/R) and ground.
OK or NG
OK >> Replace optical sensor. Refer to LT-64, "Removal and
Installation of Optical Sensor" . Recheck sensor output
with CONSULT-II. If NG, replace BCM. Refer to BCS-19, "
Removal and Installation of BCM" .
NG >> Repair harness or connector.Illuminated
OPTICAL SENSOR : 3.0V or less
Not illuminated
OPTICAL SENSOR : 3.1V or more
WKIA0486E
18 (P) - 3 (P) : Continuity should exist.
18 (P) - Ground : Continuity should not exist.
WKIA1754E
58 (W/R) - 4 (W/R) : Continuity should exist.
58 (W/R) - Ground : Continuity should not exist.
WKIA1755E

LT-74
FRONT FOG LAMP
Revision: August 20072004 QX56
Terminals and Reference Values for IPDM E/REKS007B9
How to Proceed With Trouble DiagnosisEKS007BA
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT-69, "
System Description" .
3. Perform the Preliminary Check. Refer to LT-75, "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the front fog lamp operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
35 O/B Combination switch output 2
ONLighting, turn, wiper OFF
Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON — Battery voltage
39 W CAN-H — — —
40 R CAN-L — — —
67 B Ground ON — 0V
70 W/B Battery power supply (fusible link) OFF — Battery voltage Terminal
No.Wire
colorSignal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
SKIA5292E
Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
38 B Ground ON — 0V
39 W CAN-H — — —
40 R CAN-L — — —
50 W/RFront turn/fog
lamp (LH)ONLighting switch must be in the 2ND position
or AUTO position (LOW beam is ON) and
the front fog lamp switch must be ONOFF 0V
ON Battery voltage
51 W/RFront turn/fog
lamp (RH) ONLighting switch must be in the 2ND position
or AUTO position (LOW beam is ON) and
the front fog lamp switch must be ONOFF 0V
ON Battery voltage
59 B Ground ON — 0V

FRONT FOG LAMP
LT-77
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
4. IPDM E/R INSPECTION
Start auto active test. Refer to PG-23, "
Auto Active Test" . When
front fog lamp relay is operating, check voltage between left/right
front fog lamp connector terminals and ground.
OK or NG
OK >> Check front fog lamp bulbs and replace as necessary.
NG >> Replace IPDM E/R. Refer to PG-29, "
Removal and Installation of IPDM E/R" .
Front Fog Lamp Does Not Illuminate (One Side)EKS007BE
1. BULB INSPECTION
Inspect bulb of lamp which does not illuminate.
OK or NG
OK >> GO TO 2.
NG >> Replace front fog lamp bulb. Refer to LT- 7 9 , "
Bulb Replacement" .
2. INSPECTION BETWEEN IPDM E/R AND FRONT FOG LAMPS
1. Disconnect IPDM E/R connector and inoperative front fog lamp connector.
2. Check continuity between harness connector terminals of IPDM
E/R and harness connector terminal of front fog lamps.
OK or NG
OK >> Check ground circuit. If OK, replace IPDM E/R. Refer to
PG-29, "
Removal and Installation of IPDM E/R" . If NG,
repair harness or connector.
NG >> Check for short circuits and open circuits in harness between IPDM E/R and front fog lamps.
Front fog lamp
(–)Vo l ta g e
(Approx.) (+)
ConnectorTe r m i n a l
(wire color)
LH E101
1 (W/R) Ground Battery voltage
RH E102
WKIA1884E
IPDM E/R Front fog lamp
Continuity
ConnectorTe r m i n a l
(wire color)ConnectorTe r m i n a l
(wire color)
E12350 (W/R) LH E101
1 (W/R) Yes
51 (W/R) RH E102
WKIA1885E

LT-86
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: August 20072004 QX56
How to Proceed With Trouble DiagnosisEKS007BN
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT-80, "
System Description" .
3. Perform preliminary check. Refer to LT-87, "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Do turn signal and hazard warning lamps operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
34 L Combination switch output 3 ONLighting, turn, wiper OFF
Wiper dial position 4
35 O/B Combination switch output 2
ONLighting, turn, wiper OFF
Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON — Battery voltage
39 W CAN-H — — —
40 R CAN-L — — —
60 G/B Turn signal (left) ONCombina-
tion switchTu rn le ft O N
61 G/Y Turn signal (right) ONCombina-
tion switchTurn right ON
67 B Ground ON — 0V
70 W/B Battery power supply OFF — Battery voltage Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
SKIA5291E
SKIA5292E
SKIA3009J
SKIA3009J

LT-90
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: August 20072004 QX56
Turn Signal Lamp Does Not OperateEKS007BQ
1. CHECK COMBINATION SWITCH INPUT SIGNAL
With CONSULT-II
Select “BCM” on CONSULT-II. With “FLASHER” data monitor, make
sure “TURN SIGNAL R” and “TURN SIGNAL L” turns ON-OFF
linked with operation of lighting switch.
Without CONSULT-II
Refer to LT- 1 0 0 , "
Combination Switch Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Check lighting switch. Refer to LT-100, "
Combination Switch Inspection" .
2. ACTIVE TEST
With CONSULT-II
1. Select “FLASHER” during active test. Refer to LT-89, "
ACTIVE
TEST" .
2. Make sure “FLASHER RH” and “FLASHER LH” operate.
Without CONSULT-II
GO TO 3.
OK or NG
OK >> Replace BCM. Refer to BCS-19, "Removal and Installa-
tion of BCM" .
NG >> GO TO 3.
3. CHECK TURN SIGNAL LAMPS CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and front turn/fog lamp LH and RH
connectors.
3. Check continuity between BCM harness connector M20 terminal
60 (G/B) and front turn/fog lamp LH harness connector E101 ter-
minal 2 (G/B).
4. Check continuity between BCM harness connector M20 terminal
61 (G/Y) and front turn/fog lamp RH harness connector E102
terminal 2 (G/Y).
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.When lighting switch is in
TURN RH position: TURN SIGNAL R ON
When lighting switch is in
TURN LH position: TURN SIGNAL L ON
SKIA4499E
SKIA6190E
60 (G/B) - 2 (G/B) : Continuity should exist.
61 (G/Y) - 2 (G/Y) : Continuity should exist.
WKIA1890E

TURN SIGNAL AND HAZARD WARNING LAMPS
LT-91
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
4. CHECK GROUND
1. Check continuity between front turn/fog lamp LH harness con-
nector E101 terminal 3 (B) and ground.
2. Check continuity between front turn/fog lamp RH harness con-
nector E102 terminal 3 (B) and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5. CHECK BULB
Check bulb standard of each turn signal lamp is correct. Refer to LT-170, "
Exterior Lamp" .
OK or NG
OK >> Replace BCM if turn signal lamps do not work after setting the connector again. Refer to BCS-19,
"Removal and Installation of BCM" .
NG >> Replace turn signal lamp bulb. Refer to LT- 9 4 , "
Bulb Replacement (Front Turn Signal Lamp)" .
Rear Turn Signal Lamp Does Not OperateEKS007BR
1. CHECK BULB
Check bulb standard of each turn signal lamp is correct. Refer to LT-170, "
Exterior Lamp" .
OK or NG
OK >> GO TO 2.
NG >> Replace turn signal lamp bulb. Refer to LT-122, "
Bulb Replacement (Turn Signal)" .
2. CHECK TURN SIGNAL LAMPS CIRCUIT
1. Disconnect BCM connector and rear turn signal lamp connector.
2. Check continuity between BCM harness connector M20 terminal
61 (G/Y) and rear turn signal lamp RH harness connector B105
terminal 1 (G/Y).
3. Check continuity between BCM harness connector M20 terminal
60 (G/B) and rear turn signal lamp LH harness connector B35
terminal 1 (G/B).
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.3 (B) - Ground : Continuity should exist.
3 (B) - Ground : Continuity should exist.
WKIA1891E
61 (G/Y) - 1 (G/Y) : Continuity should exist.
60 (G/B) - 1 (G/B) : Continuity should exist.
WKIA1892E

LT-92
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: August 20072004 QX56
3. CHECK GROUND CIRCUIT
Check continuity between rear turn signal lamp harness connector
B35 LH and B105 RH terminal 3 (B) and ground.
OK or NG
OK >> Check rear turn signal lamp connector for proper con-
nection. Repair as necessary.
NG >> Repair harness or connector.
Hazard Warning Lamp Does Not Operate But Turn Signal Lamps OperateEKS007BS
1. CHECK BULB
Make sure bulb standard of each turn signal lamp is correct. Refer to LT-170, "
Exterior Lamp" .
OK or NG
OK >> GO TO 2.
NG >> Replace turn signal lamp bulb. Refer to LT- 9 4 , "
Bulb Replacement (Front Turn Signal Lamp)" for
front turn signal bulb. Refer to LT-122, "
Bulb Replacement (Turn Signal)" for rear turn signal bulb.
2. CHECK HAZARD SWITCH INPUT SIGNAL
With CONSULT-II
Select “BCM” on CONSULT-II. With “FLASHER” data monitor, make
sure “HAZARD SW” turns ON-OFF linked with operation of hazard
switch.
Without CONSULT-II
Check voltage between BCM harness connector M18 terminal 29
(W/B) and ground.
OK or NG
OK >> Replace BCM. Refer to BCS-19, "Removal and Installa-
tion of BCM" .
NG >> GO TO 3.3 (B) - Ground : Continuity should exist.
WKIA1893E
When hazard switch is in
ON position : HAZARD SW ON
SKIA4500E
BCM
(–) ConditionVo ltag e
(Approx.) (+)
ConnectorTe r m i n a l
(wire color)
M18 29 (W/B) GroundHazard switch is ON 0V
Hazard switch is OFF 5V
WKIA1969E

TURN SIGNAL AND HAZARD WARNING LAMPS
LT-93
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
3. CHECK HAZARD SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and hazard switch connector.
3. Check continuity between BCM harness connector M18 terminal
29 (W/B) and hazard switch harness connector M55 terminal 2
(W/B).
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK GROUND
Check continuity between hazard switch harness connector M55 ter-
minal 1 (B) and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5. CHECK HAZARD SWITCH
1. Disconnect hazard switch connector.
2. Check continuity of hazard switch.
OK or NG
OK >> Replace BCM if turn signal lamps does not work after
setting the connector again. Refer to BCS-19, "
Removal
and Installation of BCM" .
NG >> Replace hazard switch. Refer to LT-96, "
Removal and Installation" .
Turn Signal Indicator Lamp Does Not OperateEKS007BT
1. CHECK CAN COMMUNICATION SYSTEM
Check CAN communication. Refer to LAN-5, "
CAN COMMUNICATION" .
OK or NG
OK >> Replace combination meter. Refer to IP-13, "Combination Meter" .
NG >> Repair as necessary.29 (W/B) - 2 (W/B) : Continuity should exist.
WKIA1894E
1 (B) - Ground : Continuity should exist.
WKIA1895E
Hazard switch
Condition Continuity
Te r m i n a l
12Hazard switch is ON Yes
Hazard switch is OFF No
WKIA1896E

PARKING, LICENSE PLATE AND TAIL LAMPS
LT-115
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
Terminals and Reference Values for IPDM E/REKS007CJ
How to Proceed With Trouble DiagnosisEKS007CK
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 1 0 8 , "
System Description" .
3. Carry out the Preliminary Check. Refer to LT- 11 6 , "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Do the parking, license and tail lamps operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
35 O/B Combination switch output 2
ONLighting, turn, wiper OFF
Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON — Battery voltage
39 W CAN-H — — —
40 R CAN-L — — —
67 B Ground ON — 0V
70 W/B Battery power supply (fusible link) OFF — Battery voltage Terminal
No.Wire
colorSignal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
SKIA5292E
Terminal
No.Wire
colorSignal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
38 B Ground ON — 0V
39 W CAN-H — — —
40 R CAN-L — — —
57 R/LParking, license, and tail
lampONLighting switch
1ST positionOFF 0V
ON Battery voltage
59 B Ground ON — 0V