Infiniti QX56 (Z62). Manual — part 1393

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< SYMPTOM DIAGNOSIS >

WIPER AND WASHER SYSTEM SYMPTOMS

Front wiper does not
stop

HI only

• Combination switch
• BCM

Combination switch
Refer to

BCS-80, "Symptom

Table"

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

Table"

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

Table"

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

Table"

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

Table"

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

Table"

INT only

• Combination switch
• Harness between combination switch and BCM
• BCM

Combination switch
Refer to

BCS-80, "Symptom

Table"

ON and INT

• Combination switch
• Harness between combination switch and BCM
• BCM

Combination switch
Refer to

BCS-80, "Symptom

Table"

• 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

Table"

Symptom

Probable malfunction location

Inspection item

WIPER AND WASHER SYSTEM SYMPTOMS

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< SYMPTOM DIAGNOSIS >

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F

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B

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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

Table"

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

Table"

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

Table"

• 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

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< SYMPTOM DIAGNOSIS >

NORMAL OPERATING CONDITION

NORMAL OPERATING CONDITION

Description

INFOID:0000000006300483

FRONT WIPER MOTOR PROTECTION FUNCTION

• IPDM E/R may stop the front wiper to protect the front wiper motor if any obstruction (operation resistance)

such as a large amount of snow is detected during the front wiper operation.

• At that time turn OFF the front wiper and remove the foreign object. Then wait for approximately 20 seconds

or more and reactivate the front wiper. The wiper will operate normally.

REAR WIPER MOTOR PROTECTION FUNCTION

• BCM may stop rear wiper to protect the rear wiper motor when the rear wiper is stopped for 5 seconds or

more due to a snowfall.

• Rear wiper operates normally one minute after the obstacles are removed with rear wiper OFF.

FRONT WIPER DOES NOT OPERATE

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< SYMPTOM DIAGNOSIS >

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FRONT WIPER DOES NOT OPERATE

Description

INFOID:0000000006300484

The front wiper does not operate under any operation conditions.

Diagnosis Procedure

INFOID:0000000006300485

1.

CHECK WIPER RELAY OPERATION

CONSULT-III ACTIVE TEST

1.

Select “FRONT WIPER” of IPDM E/R active test item.

2.

With operating the test item, check front wiper operation.

Is front wiper operation normally?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK FRONT WIPER MOTOR FUSE

Check front wiper motor fuse. Refer to

WW-35, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the fuse after repairing the applicable circuit.

3.

CHECK FRONT WIPER MOTOR GROUND CIRCUIT

Check front wiper motor ground circuit. Refer to

WW-39, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK FRONT WIPER MOTOR INPUT VOLTAGE

CONSULT-III ACTIVE TEST

1.

Turn ignition switch OFF.

2.

Disconnect front wiper motor connector.

3.

Turn ignition switch ON.

4.

Select “FRONT WIPER” of IPDM E/R active test item.

5.

With operating the test item, check voltage between front wiper motor harness connector and ground.

Is the inspection result normal?

YES

>> Replace front wiper motor.

NO

>> Replace IPDM E/R.

5.

CHECK FRONT WIPER REQUEST SIGNAL INPUT

CONSULT-III DATA MONITOR

1.

Select “FR WIP REQ” of IPDM E/R data monitor item.

2.

Switch the front wiper switch to HI and LO.

Lo

: Front wiper LO operation

Hi

: Front wiper HI operation

Off

: Stop the front wiper.

(+)

(

−

)

Condition

Voltage (Approx.)

Front wiper motor

Connector

Terminal

E42

1

Ground

FRONT WIPER

Lo

Battery voltage

Off

0 V

4

Hi

Battery voltage

Off

0 V