Infiniti G37 Coupe. Manual - part 1451

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< SYMPTOM DIAGNOSIS >

FRONT WIPER AND WASHER SYSTEM SYMPTOMS

Front wiper does not 
stop

HI only

• Combination switch
• BCM

Combination switch
Refer to 

BCS-77, "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-77, "Symptom 

Table"

.

Front wiper request signal
• BCM
• IPDM E/R

IPDM E/R
Data monitor "FR WIP REQ"

IPDM E/R

—

INT only

• Combination switch
• BCM

Combination switch
Refer to 

BCS-77, "Symptom 

Table"

.

Front wiper request signal
• BCM
• IPDM E/R

IPDM E/R
Data monitor "FR WIP REQ"

Front wiper does not 
operate normally

Intermittent adjustment 
cannot be performed

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

Combination switch
Refer to 

BCS-77, "Symptom 

Table"

.

BCM

—

Intermittent control 
linked with vehicle 
speed cannot be per-
formed

Check the vehicle speed detection wiper setting.
Refer to 

WW-11, "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-77, "Symptom 

Table"

.

BCM

—

Does not return to stop 
position (Repeatedly 
operates for 10 sec-
onds and then stops 
for 20 seconds. After 
that, it stops the opera-
tion.

• IPDM E/R
• Harness between IPDM E/R and front wiper 

motor

• Front wiper motor

Front wiper auto stop signal 
circuit
Refer to 

WW-23, "Compo-

nent Function Check"

.

Symptom

Probable malfunction location

Inspection item

FRONT WIPER DOES NOT OPERATE

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FRONT WIPER DOES NOT OPERATE

Description

INFOID:0000000001629632

The front wiper does not operate under any operating conditions.

Diagnosis Procedure

INFOID:0000000001629633

1.

CHECK WIPER RELAY OPERATION

IPDM E/R AUTO ACTIVE TEST

1.

Start IPDM E/R auto active test. Refer to 

PCS-11, "Diagnosis Description"

.

2.

Check that the front wiper operates at the LO/HI operation.

CONSULT-III ACTIVE TEST

1.

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

2.

With operating the test item, check that front wiper LO/HI operation and OFF.

Does the front wiper operate?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK FRONT WIPER MOTOR FUSE

1.

Turn the ignition switch OFF.

2.

Check that the front wiper motor 30A (#60) fuse is not fusing.

Is the fuse fusing?

YES

>> Replace the fuse after repairing the applicable circuit.

NO

>> GO TO 3.

3.

CHECK FRONT WIPER MOTOR (GND) OPEN CIRCUIT

1.

Disconnect front wiper motor connector.

2.

Check continuity between front wiper motor harness connector and ground.

Does continuity exist?

YES

>> GO TO 4.

NO

>> Repair the harnesses or connectors.

4.

CHECK FRONT WIPER MOTOR OUTPUT VOLTAGE

CONSULT-III ACTIVE TEST

1.

Disconnect front wiper motor connector.

2.

Turn the ignition switch ON.

3.

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

4.

With operating the test item, check voltage between IPDM E/R harness connector and ground.

Lo

: Front wiper LO operation

Hi

: Front wiper HI operation

Off

: Stop the front wiper.

Front wiper motor

Ground

Continuity

Connector

Terminal

E42

2

Existed

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< SYMPTOM DIAGNOSIS >

FRONT WIPER DOES NOT OPERATE

Is the measurement 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.

3.

With operating the front wiper switch, check the monitor status.

Is the status of item normal?

YES

>> Replace IPDM E/R.

NO

>> GO TO 6.

6.

CHECK COMBINATION SWITCH

Perform the inspection of the combination switch. Refer to 

BCS-77, "Symptom Table"

.

Is combination switch normal?

YES

>> Replace BCM.

NO

>> Repair or replace the applicable parts.

Terminals

Test item

Voltage 

(Approx.)

(+)

(-)

IPDM E/R

Ground

FRONT WIP-

ER

Connector

Terminal

E5

4

Lo

Battery 
voltage

Off

0 V

5

Hi

Battery 
voltage

Off

0 V

Monitor item

Condition

Monitor status

FR WIPER REQ

Front wiper 
switch HI

ON

Hi

OFF

Stop

Front wiper 
switch LO

ON

Low

OFF

Stop

NORMAL OPERATING CONDITION

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NORMAL OPERATING CONDITION

Description

INFOID:0000000001629634

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.