INFINITI QX56 2008 Factory Service Manual

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FRONT WIPER AUTO STOP SIGNAL CIRCUIT
Check continuity between IPDM E/R harness connector and front
wiper motor harness connector.
Does continuity exist?
YES >> Replace front wiper motor. Refer to WW-77, "Wiper
Motor and Linkage".
NO >> Repair or replace harness.
IPDM E/R Front wiper motor
Continuity
Connector Terminal Connector Terminal
E122 43 E236Yes
WKIA2829E
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FRONT WIPER MOTOR GROUND CIRCUITWW-25
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FRONT WIPER MOTOR GROUND CIRCUIT
Diagnosis ProcedureINFOID:0000000001735585
1. CHECK FRONT WIPER MOTO R (GROUND) OPEN CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect front wiper motor.
3. Check continuity between front wiper motor harness connector and ground.
Does continuity exist?
YES >> Front wiper motor ground circuit is normal.
NO >> Repair or replace harness.
Front wiper motor GroundContinuity
Connector Terminal
E23 1 Yes
WKIA2828E
Revision: March 2010 2008 QX56

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< COMPONENT DIAGNOSIS >
WASHER SWITCH
WASHER SWITCH
DescriptionINFOID:0000000001735586
• Washer switch is integrated with combination switch.
• Combination switch switches polarity between front washer operating and rear washer operating to supply
power to the front and rear washer motor on ground.
Component InspectionINFOID:0000000001735587
1. CHECK FRONT WASHER SWITCH
1. Turn the ignition switch OFF.
2. Disconnect combination switch.
3. Check continuity between the combination switch terminals.
Does continuity exist?
YES >> GO TO 2.
NO >> Replace combination switch. Refer to WW-82, "
Wiper and Washer Switch".
2. CHECK REAR WASHER SWITCH
ALLIA0350GB
A: Terminal 14
B: Terminal 12
C: Terminal 13
D: Terminal 11
ALLIA0839ZZJPLIA0164GB
Combination switch ConditionContinuity
Te r m i n a l
11 1 2
Front washer switch ON Yes
13 14
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1. Turn the ignition switch OFF.
2. Disconnect combination switch.
3. Check continuity between the combination switch terminals.
Does continuity exist?
YES >> Wiper and washer switch is normal.
NO >> Replace combination switch. Refer to WW-82, "
Wiper and Washer Switch".
A: Terminal 14
B: Terminal 12
C: Terminal 13
D: Terminal 11
ALLIA0840ZZJPLIA0164GB
Combination switch
ConditionContinuity
Te r m i n a l
11 1 4
Rear washer switch ON Yes
12 13
Revision: March 2010 2008 QX56

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< COMPONENT DIAGNOSIS >
REAR WIPER MOTOR CIRCUIT
REAR WIPER MOTOR CIRCUIT
Component Function CheckINFOID:0000000001735588
1. CHECK REAR WIPER ON OPERATION
CONSULT-III ACTIVE TEST
1. Select "RR WIPER" of BCM active test item.
2. While operating the test item, check rear wiper operation.
Is rear wiper operation normal?
YES >> Rear wiper motor circuit is normal.
NO >> Refer to WW-28, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001735589
1. CHECK REAR WIPER MOTOR OUTPUT VOLTAGE
CONSULT-III ACTIVE TEST
1. Turn the ignition switch OFF.
2. Disconnect rear wiper motor.
3. Turn the ignition switch ON.
4. Select "RR WIPER" of BCM active test item.
5. While operating the test item, check voltage between BCM har-
ness connector and ground.
Is the measurement value normal?
YES >> GO TO 2
NO >> GO TO 3
2. CHECK REAR WIPER MOTOR GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Check continuity between rear wiper motor harness connector and ground.
Does continuity exist?
YES >> Replace rear wiper motor. Refer to WW-83, "Rear Wiper
Motor".
NO >> Repair or replace harness.
3. CHECK GLASS HATCH AJAR SWITCH CIRCUIT
1. Disconnect BCM harness connector M19.
2. Turn ignition switch OFF. ON : Rear wiper ON operation
OFF : Stop the rear wiper.
Te r m i n a l s Te s t i t e m
Vo l ta g e
(Approx.)
(+)
(−)
BCM
REAR WIPER
Connector Terminal
M19 54
Ground ON Battery voltage
55 OFF0V
WKIA1417E
Rear wiper motor
GroundContinuity
Connector Terminal
D704 3
Ye s
5
WKIA1416E
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3. Make sure hatch glass is closed
4. Check continuity between BCM harness connector and ground.
Does continuity exist?
YES >> GO TO 4.
NO >> Repair harness if shorted. If not, refer to DLK-125,
"Diagnosis Procedure".
4. CHECK REAR WIPER MOTOR OPEN CIRCUIT
1. Check continuity between BCM harness connector and rear wiper motor harness connector.
Does continuity exist?
YES >> GO TO 5
NO >> Repair or replace harness.
5. CHECK REAR WIPER MOTOR SHORT CIRCUIT
Check continuity between BCM harness connector and ground.
Does continuity exist?
YES >> Repair or replace harness.
NO >> Replace BCM. Refer to BCS-55, "
Removal and Installa-
tion".
BCM
GroundContinuity
Connector Terminal
M19 42 No
WKIA1414E
BCMRear wiper motor
Continuity
Connector Terminal Connector Terminal
M19 54
D704 6
Ye s
55 4
WKIA1413E
BCM
GroundContinuity
Connector Terminal
M19 54
No
55
ALLIA0449ZZ
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< COMPONENT DIAGNOSIS >
REAR WIPER AUTO STOP SIGNAL CIRCUIT
REAR WIPER AUTO STOP SIGNAL CIRCUIT
Component Function CheckINFOID:0000000001735590
1. CHECK REAR WIPER (AUTO STOP) OPERATION
CONSULT-III DATA MONITOR
1. Select "WIPER" of BCM data monitor item.
2. Operate the rear wiper.
3. Check that "RR WIPER STOP" changes to "O N" and "OFF" linked with the wiper operation.
Is the status of item normal?
YES >> Rear wiper auto stop signal circuit is normal.
NO >> Refer to WW-30, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001735591
1. CHECK REAR WIPER MOTOR AUTO STOP CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect BCM and rear wiper motor.
3. Check continuity between BCM harness connector terminals and rear wiper motor harness connector terminals.
Is inspection result normal?
YES >> GO TO 2
NO >> Repair or replace harness.
2. CHECK AUTO STOP CIRCUITS FOR SHORT TO GROUND
Check continuity between BCM harness connector terminals and
ground.
Is inspection result normal?
YES >> Replace BCM. Refer to BCS-55, "Removal and Installa-
tion".
NO >> Repair or replace harness.
Monitor item ConditionMonitor status
RR WIPER STOP Rear wiper motor Stop position
ON
Except stop position OFF
BCM Rear wiper motor
Continuity
Connector Terminal Connector Terminal
M18 26 D7041
Ye s
M19 44 2
WKIA1415E
BCM
GroundContinuity
Connector Terminal
M18 26 No
M19 44
WKIA1421E
Revision: March 2010 2008 QX56

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FRONT WIPER AND WASHER SYSTEM
Wiring DiagramINFOID:0000000001735592
AALWA0071GB
Revision: March 2010 2008 QX56

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FRONT WIPER AND WASHER SYSTEM
AALIA0138GB
Revision: March 20102008 QX56

FRONT WIPER AND WASHER SYSTEMWW-33
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AWLIA0145GB
Revision: March 2010 2008 QX56