INFINITI QX56 2011 Factory Service Manual

WW-42
< DTC/CIRCUIT DIAGNOSIS >
WASHER SWITCH
WASHER SWITCH
Component InspectionINFOID:0000000006300477
1.CHECK WASHER SWITCH
1. Turn ignition switch OFF.
2. Disconnect combination switch connector.
3. Check continuity between the combination switch terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace combination switch (Wiper and washer switch).
A: Terminal 4
B: Terminal 6
C: Terminal 3
D: Terminal 1
JPLIA0164GB
Combination switch Condition Continuity
Terminal
34 Front washer switch ON
Existed
16
14
Rear washer switch ON
63
Revision: 2010 May2011 QX56

REAR WIPER MOTOR CIRCUITWW-43
< DTC/CIRCUIT DIAGNOSIS >
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REAR WIPER MOTOR CIRCUIT
Component Function CheckINFOID:0000000006300478
1.CHECK REAR WIPER ON OPERATION
CONSULT-III ACTIVE TEST
1. Select “RR WIPER” of BCM active test item.
2. With operating the test item, check rear wiper operation.
Is rear wiper operation normally?
YES >> Rear wiper motor circuit is normal.
NO >> Refer to WW-43, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006300479
1.CHECK REAR WIPER MOTOR OUTPUT VOLTAGE
CONSULT-III ACTIVE TEST
1. Turn ignition switch OFF.
2. Disconnect rear wiper motor connector.
3. Turn ignition switch ON.
4. Select “RR WIPER” of BCM active test item.
5. With operating the test item, check voltage between rear wiper motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK REAR WIPER MOTOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between BCM harness connector and rear wiper motor harness connector.
4. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> Repair or replace harness.
3.CHECK REAR WIPER MOTOR GROUND OPEN CIRCUIT
Check continuity between rear wi per motor harness connector and ground.
On : Rear wiper ON operation
Off : Stop the rear wiper.
(+)
(− ) Condition Voltage (Approx.)
Rear wiper motor
Connector Terminal
D160 2 Ground REAR WIPER On Battery voltage
Off 0 V
BCM Rear wiper motor Continuity
Connector Terminal Connector Terminal
M70 54 D160 2 Existed
BCM GroundContinuity
Connector Terminal
M70 54 Not existed
Revision: 2010 May2011 QX56

WW-44
< DTC/CIRCUIT DIAGNOSIS >
REAR WIPER MOTOR CIRCUIT
Is the inspection result normal?
YES >> Replace rear wiper motor.
NO >> Repair or replace harness.
Rear wiper motorGroundContinuity
Connector Terminal
D160 4 Existed
Revision: 2010 May2011 QX56

REAR WIPER AUTO STOP SIGNAL CIRCUITWW-45
< DTC/CIRCUIT DIAGNOSIS >
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REAR WIPER AUTO STOP SIGNAL CIRCUIT
Component Function CheckINFOID:0000000006300480
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-45, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006300481
1.CHECK REAR WIPER MOTOR (AUTO STOP) OUTPUT VOLTAGE
1. Turn ignition switch OFF.
2. Disconnect rear wiper motor connector.
3. Turn ignition switch ON.
4. Check voltage between rear wiper motor harness connector and ground.
Is the inspection result normal?
YES >> Replace rear wiper motor.
NO >> GO TO 2.
2.CHECK REAR WIPER MOTOR (AUTO STOP) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between BCM harness connector and rear wiper motor harness connector.
4. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> Repair or replace harness.
Monitor item Condition Monitor status
RR WIPER STOP Rear wiper motor Stop position On
Except stop position Off
(+)
(− ) Voltage (Approx.)
Rear wiper motor
Connector Terminal D160 3 Ground Battery voltage
BCM Rear wiper motor Continuity
Connector Terminal Connector Terminal
M70 44 D160 3 Existed
BCM GroundContinuity
Connector Terminal
M70 44 Not existed
Revision: 2010 May2011 QX56

WW-46
< DTC/CIRCUIT DIAGNOSIS >
HEADLAMP WASHER RELAY
HEADLAMP WASHER RELAY
Component InspectionINFOID:0000000006371494
1.CHECK HEADLAMP WASHER RELAY
1. Turn the ignition switch OFF.
2. Remove headlamp washer relay.
3. Apply battery voltage to headlamp washer relay between terminals 1 and 2.
4. Check continuity of headlamp washer relay.
Does continuity exist?
YES >> Headlamp washer relay is normal.
NO >> Replace headlamp washer relay.
Headlamp washer relay Condition Continuity
Terminal Voltage
35 Apply Existed
Not Apply Not existed
Revision: 2010 May2011 QX56

HEADLAMP WASHER CIRCUITWW-47
< DTC/CIRCUIT DIAGNOSIS >
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HEADLAMP WASHER CIRCUIT
Component Function CheckINFOID:0000000006371495
1.CHECK HEADLAMP WASHER OPERATION
CONSULT-III ACTIVE TEST
1. Select “HEAD LAMP WASHER” of IPDM E/R active test item.
2. With operating the test item, check headlamp operation.
Is headlamp washer operation normally?
YES >> Headlamp washer circuit is normal.
NO >> Refer to WW-47, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006371496
1.CHECK HEADLAMP WASHER FUSIBLE LINK
1. Turn the ignition switch OFF.
2. Check that the headlamp washer 30A fusible link (#U) is not fusing.
Is the fusible link fusing?
YES >> Replace the fusible link after repairing the applicable circuit.
NO >> GO TO 2.
2.CHECK HEADLAMP WASHER RELAY POWER SUPPLY
1. Remove headlamp washer relay.
2. Check voltage between headlamp washer relay harness connector and ground.
Is the measurement value normal?
YES >> GO TO 3.
NO >> Repair harnesses or connectors.
3.CHECK HEADLAMP WASHER RELAY
Check headlamp washer relay. Refer to WW-46, "
Component Inspection".
Is the headlamp washer relay normal?
YES >> GO TO 4.
NO >> Replace headlamp washer relay.
4.CHECK HEADLAMP WASHER RELAY CONTROL SIGNAL
CONSULT-III ACTIVE TEST
1. Turn the ignition switch OFF.
2. Install headlamp washer relay.
3. Turn the ignition switch ON.
4. Select “HEAD LAMP WASHER” of IPDM E/R active test item.
5. With operating the test item, check vo ltage between IPDM E/R harness connector and ground.
On :Headlamp washer ON operation
Off :Stop the headlamp washer.
(+)
(− ) Voltage (Approx.)
Headlamp washer relay
Connector Terminal
E51 1
Ground Battery voltage
3
(+)
(− ) Te s t i t e m
Voltage (Approx.)
IPDM E/R
HEAD LAMP WASHER
Connector Terminal
Revision: 2010 May2011 QX56

WW-48
< DTC/CIRCUIT DIAGNOSIS >
HEADLAMP WASHER CIRCUIT
Is the measurement value normal?
YES >> GO TO 7.
Fixed at 0 V >> GO TO 5.
Fixed at battery voltage >>Replace IPDM E/R.
5.CHECK HEADLAMP WASHER RELAY CONTROL SIGNAL OPEN CIRCUIT
1. Turn the ignition switch OFF.
2. Remove headlamp washer relay.
3. Disconnect IPDM E/R harness connector.
4. Check continuity between IPDM E/R harness c onnector and headlamp washer relay harness connector.
Does continuity exist?
YES >> GO TO 6.
NO >> Repair the harnesses or connectors.
6.CHECK HEADLAMP WASHER RELAY CONTROL SIGNAL SHORT CIRCUIT
Check continuity between IPDM E/R harness connector and ground.
Does continuity exist?
YES >> Repair the harnesses or connectors.
NO >> Replace IPDM E/R.
7.CHECK HEADLAMP WASHER PUMP OPEN CIRCUIT
1. Turn the ignition switch OFF.
2. Remove headlamp washer relay.
3. Disconnect headlamp washer pump connector.
4. Check continuity between headlamp washer re lay harness connector and headlamp washer pump har-
ness connector.
Does continuity exist?
YES >> GO TO 8.
NO >> Repair the harnesses or connectors.
8.CHECK HEADLAMP WASHER PUMP (GND) OPEN CIRCUIT
Check continuity headlamp washer pump harness connector and ground.
Does continuity exist?
YES >> Replace headlamp washer pump.
NO >> Repair the harnesses or connectors.
E12 21 Ground On 0 V
Off Battery voltage
IPDM E/R Headlamp washer relay Continuity
Connector Terminal Connector Terminal
E12 21 E51 2 Existed
IPDM E/R GroundContinuity
Connector Terminal
E12 21 Not existed
Headlamp washer relay Headlamp washer pump Continuity
Connector Terminal Connector Terminal
E51 5 E41 1 Existed
Headlamp washer pump GroundContinuity
Connector Terminal
E41 2 Existed
Revision: 2010 May2011 QX56

WIPER AND WASHER SYSTEM SYMPTOMSWW-49
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
WIPER AND WASHER SYSTEM SYMPTOMS
Symptom TableINFOID:0000000006300482
Symptom Probable malfunction location Inspection item
Front wiper does not
operate HI only
 Combination switch
 Harness between combination switch and BCM
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
 IPDM E/R
 Harness between IPDM E/R and front wiper
motor
 Front wiper motor Front wiper motor (HI) circuit
Refer to
WW-37, "
Compo-
nent Function Check"
Front wiper request signal
BCM
 IPDM E/R IPDM E/R DATA MONITOR
“FR WIP REQ”
Lo and INT (AUTO)  Combination switch
 Harness between combination switch and BCM
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
 IPDM E/R
 Harness between IPDM E/R and front wiper
motor
 Front wiper motor Front wiper motor (LO) circuit
Refer to
WW-36, "
Compo-
nent Function Check"
Front wiper request signal
BCM
 IPDM E/R IPDM E/R DATA MONITOR
“FR WIP REQ”
INT (AUTO) only  Combination switch
 Harness between combination switch and BCM
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
Front wiper request signal
BCM
 IPDM E/R IPDM E/R DATA MONITOR
“FR WIP REQ”
HI, LO and INT (AU-
TO) SYMPTOM DIAGNOSIS
“FRONT WIPER DOES NOT OPERATE”
Refer to
WW-53, "
Diagnosis Procedure".
AUTO only  Combination switch
 Harness between combination switch and BCM
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
 Light & rain sensor
 Harness between light & rain sensor and BCM
BCM Light & rain sensor
Refer to
WW-40, "
Compo-
nent Function Check".
Revision: 2010 May2011 QX56

WW-50
< SYMPTOM DIAGNOSIS >
WIPER AND WASHER SYSTEM SYMPTOMS
Front wiper does not
stopHI only
 Combination switch
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
Front wiper request signal
BCM
 IPDM E/R IPDM E/R DATA MONITOR
“FR WIP REQ”
IPDM E/R —
LO only  Combination switch
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
Front wiper request signal
BCM
 IPDM E/R IPDM E/R DATA MONITOR
“FR WIP REQ”
IPDM E/R —
INT (AUTO) only  Combination switch
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
Front wiper request signal
BCM
 IPDM E/R IPDM E/R DATA MONITOR
“FR WIP REQ”
Front wiper does not
operate normally Sensitivity adjustment
cannot be performed.
 Combination switch
 Harness between combination switch and BCM
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
BCM —
Auto wiping operation
does not operate Check that the wiper setting is auto wiping operation
Refer to
WW-15, "
WIPER : CONSULT-III Function (BCM - WIPER)".
Intermittent control
linked with vehicle
speed cannot be per-
formed Check that the wiper setting is linked with vehicle speed
Refer to
WW-15, "
WIPER : CONSULT-III Function (BCM - WIPER)".
Wiper is not linked to
the washer operation.  Combination switch
 Harness between combination switch and BCM
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
BCM —
Does not return to stop
position. [Repeatedly
operates for 10 sec-
onds and then stops
for 20 seconds. (Fail-
safe)]  IPDM E/R
 Harness between IPDM E/R and front wiper
motor
 Front wiper motor Front wiper auto stop signal
circuit
Refer to
WW-38, "
Compo-
nent Function Check"
Rear wiper does not
operate ON only
 Combination switch
 Harness between combination switch and BCM
BCM Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
INT only  Combination switch
 Harness between combination switch and BCM
BCM Combination switch
Refer to
BCS-80, "Symptom
Ta b l e"
ON and INT  Combination switch
 Harness between combination switch and BCM
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
BCM
 Harness between rear wiper motor and BCM
 Harness between rear wiper motor and ground
 Rear wiper motor Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
Symptom Probable malfunction location Inspection item
Revision: 2010 May2011 QX56

WIPER AND WASHER SYSTEM SYMPTOMSWW-51
< SYMPTOM DIAGNOSIS >
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Rear wiper does not
stop ON only
 Combination switch
BCM Rear wiper motor circuit
Refer to
WW-43, "
Compo-
nent Function Check".
INT only  Combination switch
BCM Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
Rear wiper does not
operate normally Wiper is not linked to
the washer operation.
 Combination switch
 Harness between rear wiper motor and BCM
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
BCM —
Rear wiper does not
return to the stop posi-
tion. [Stops after a five-
second operation.
(Fail-safe)] BCM
 Harness between rear wiper motor and BCM
 Rear wiper motor
Rear wiper auto stop signal
circuit
Refer to
WW-45, "
Compo-
nent Function Check"
Rear wiper does not
operate even when
shift lever is shifted to
the “R”. Check the linked with reverse rear wiper setting.
Refer to
WW-15, "WIPER : CONSULT-III Function (BCM - WIPER)".
NOTE:
Factory setting of the rear wiper operation is operation linked with reverse.
Shift position signal (CAN communication)
BCM
TCM TCM DATA MONITOR
″
SLCT LVR POSI ″
Headlamp washer
does not operate. Headlamp washer
does not operate with
the front washer when
headlamps are turned
ON.  Combination switch
 Harness between combination switch and BCM
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
 Fusible link
 Harness between fusible link and headlamp
washer relay
 Headlamp washer relay
 Harness between haedlamp washer relay and IPDM E/R
 IPDM E/R
 Harness between haedlamp washer relay and headlamp washer pump
 headlamp washer pump
 Harness between haedlamp washer pump and ground Headlamp washer circuit
Refer to
WW-47, "
Compo-
nent Function Check"
BCM —
Symptom Probable malfunction location Inspection item
Revision: 2010 May2011 QX56