Infiniti QX56 (Z62). Manual - part 1392

WW-46

< DTC/CIRCUIT DIAGNOSIS >

HEADLAMP WASHER RELAY

HEADLAMP WASHER RELAY

Component Inspection

INFOID: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

3

5

Apply

Existed

Not Apply

Not existed

HEADLAMP WASHER CIRCUIT

WW-47

< DTC/CIRCUIT DIAGNOSIS >

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HEADLAMP WASHER CIRCUIT

Component Function Check

INFOID: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 Procedure

INFOID: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 voltage 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

(+)

(

−

)

Test item

Voltage (Approx.)

IPDM E/R

HEAD LAMP WASHER

Connector

Terminal

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 connector 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 relay 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

Ground

Continuity

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

Ground

Continuity

Connector

Terminal

E41

2

Existed

WIPER AND WASHER SYSTEM SYMPTOMS

WW-49

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

WIPER AND WASHER SYSTEM SYMPTOMS

Symptom Table

INFOID: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 

Table"

• 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 

Table"

• 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 

Table"

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 

Table"

• Light & rain sensor
• Harness between light & rain sensor and BCM
• BCM

Light & rain sensor
Refer to 

WW-40, "Compo-

nent Function Check"

.