Infiniti FX35 / FX45. Manual - part 746

GW-68

< SERVICE INFORMATION >

REAR WINDOW DEFOGGER

CONSULT-III Function (IPDM E/R)

INFOID:0000000001328007

DATA MONITOR

ACTIVE TEST

Work Flow

INFOID:0000000001328008

1.

Check the symptom and customer's requests.

2.

Understand the outline of system. Refer to 

GW-60, "System Description"

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3.

According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to 

GW-68,

"Trouble Diagnosis Symptom Chart"

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4.

Does rear window defogger operate normally? YES: GO TO 5, NO: GO TO 3.

5.

INSPECTION END.

Trouble Diagnosis Symptom Chart

INFOID:0000000001328009

Make sure other systems using the signal of the following systems operate normally.

Test item

Content

REAR DEFOGGER

Gives a drive signal to the rear window defogger relay to activate it.

IPDM E/R diagnostic test 

item

Check item diagnostic 

test mode

Content

REAR DEFOGGER

Data monitor

Displays the input data of BCM in real time.

Active test

Gives a drive signal to a load to check the operation.

Monitored Item

Description

RR DEF REQ

Indicates [ON/OFF] condition of rear window defogger function by IPDM E/R.

Test Item

Description

REAR DEFOGGER

This test is able to check rear window defogger operation. Rear window defogger operates when “ON” 
on CONSULT-III screen is touched.

Symptom

Diagnoses / Service procedure

Refer to page

Rear window defogger and door mirror defogger do not op-
erate. 

1.

Check BCM power supply and ground circuit 

GW-69

2. Check IPDM E/R auto active test 

PG-20

3. Check rear window defogger switch circuit 

GW-69

4. Check rear window defogger power supply circuit 

GW-70

5. Replace IPDM E/ R

PG-24

Rear window defogger does not operate but both of door 
mirror defogger operate.

1. Check rear window defogger circuit 

GW-72

2. Check filament 

GW-77

Door mirror defogger does not operated but both of rear 
window defogger operate. 

Check door mirror defogger power supply circuit 

GW-73

Driver side door mirror defogger does not operate.

Check driver side door mirror defogger circuit 

GW-75

Passenger side door mirror defogger does not operate.

Check passenger side door mirror defogger circuit 

GW-75

Rear window defogger switch does not light, and rear win-
dow defogger is not displayed on the display. 
But rear window defogger operates. 

Check rear window defogger signal 

GW-76

REAR WINDOW DEFOGGER

GW-69

< SERVICE INFORMATION >

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Check BCM Power Supply and Ground Circuit

INFOID:0000000001328010

First perform the “SELF-DIAG RESULTS” in “BCM” with CONSULT-III, when perform the each trouble
diagnosis. Refer to 

BCS-13, "U1000 CAN Communication Circuit"

.

1.

CHECK FUSE

• Check 15A fuse [No.1, located in the fuse block (J/B)]
• Check 15A fuse [No.22, located in the fuse block (J/B)]
• Check 50A fusible link (letter M located in the fuse and fusible link box).

NOTE:
Refer to 

GW-60, "Component Parts and Harness Connector Location"

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OK or NG

OK

>> GO TO 2.

NG

>> If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse. Refer to

PG-3

.

2.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch ON.

2.

Check voltage between BCM connector M3, M4 terminal 38, 42,
55 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check BCM power supply circuit for open or short.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector.

3.

Check continuity between BCM connector M4 terminal 49, 52
and ground.

OK or NG

OK

>> Power supply and ground circuit are OK.

NG

>> Check BCM ground circuit for open or short.

Check Rear Window Defogger Switch Circuit

INFOID:0000000001328011

1.

CHECK REAR WINDOW DEFOGGER SWITCH OPERATION 

 With CONSULT-III

Check (“REAR DEF SW”, “IGN ON SW”) in DATA MONITOR mode with CONSULT-III.

 Without CONSULT-III

1.

Turn ignition switch ON.

38 (W/L) – Ground

: Battery voltage

42 (L/R) – Ground

: Battery voltage

55 (G) – Ground

: Battery voltage

PIIA6160E

49 (B) – Ground

: Continuity should exist.

52 (B) – Ground

: Continuity should exist.

PIIA6161E

When rear window defogger switch is turned to ON

REAR DEF SW

: ON

When ignition switch is turned to ON

IGN ON SW

: ON

GW-70

< SERVICE INFORMATION >

REAR WINDOW DEFOGGER

2.

Check voltage between BCM connector ground.

OK or NG

OK

>> Rear window defogger switch is OK.

NG

>> GO TO 2.

2.

CHECK HARNESS CONTINUITY

1.

Turn ignition switch OFF.

2.

Disconnect BCM and A/C and AV switch connector.

3.

Check continuity between BCM connector M3 terminal 9 and A/
C and AV switch connector M64 terminal 16.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

3.

CHECK BCM OUTPUT SIGNAL

1.

Connect BCM connector.

2.

Turn ignition switch ON.

3.

Check voltage between BCM connector M3 terminal 9 and
ground.

OK or NG

OK

>> Replace A/C and AV switch.

NG

>> Replace BCM.

Check rear Window Defogger Power Supply Circuit

INFOID:0000000001328012

1.

CHECK FUSE 

• Check 10A fuse [No.12, located in the fuse block (J/B)]
• Check 20A fuse (No.75, located in the IPDM E/R)
• Check 20A fuse (No.80, located in the IPDM E/R)
NOTE:
Refer to 

GW-60, "Component Parts and Harness Connector Location"

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OK or NG

OK

>> GO TO 2.

NG

>> If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse, refer to

PG-3

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2.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

Connector

Terminal (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

M3

9 (L/W)

Ground

Rear window defogger 
switch is pressed.

0

Rear window defogger 
switch is OFF.

5

PIIA6208E

9 (L/W) – 16 (L/W) 

: Continuity should exist.

PIIA6209E

9 (L/W) – Ground

: Approx. 5

PIIA6208E

REAR WINDOW DEFOGGER

GW-71

< SERVICE INFORMATION >

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2.

Remove rear window defogger relay.

3.

Turn ignition switch ON.

4.

Check voltage between rear window defogger relay connector
E13 terminals 1, 3, 6 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

3.

CHECK REAR WINDOW DEFOGGER RELAY

Check continuity between rear window defogger terminals 3 and 5, 6
and 7.

OK or NG

OK

>> GO TO 4.

NG

>> Replace rear window defogger relay.

4.

CHECK REAR WINDOW DEFOGGER RELAY GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Installation rear window defogger relay.

3.

Turn ignition switch ON.

4.

Check voltage between IPDM E/R connector and ground.

OK or NG

OK

>> Rear window defogger power supply circuit is OK.

NG

>> GO TO 5.

5.

CHECK HARNESS CONTINUITY

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R connector and rear window defogger relay.

1 (OR) – Ground

: Battery voltage

3 (W) – Ground

: Battery voltage

6 (R) – Ground

: Battery voltage

PIIA4233E

Terminal

Condition

Continuity

3

5

12V direct current supply 
between terminals 1 and 2

Yes

No current supply

No

6

7

12V direct current supply 
between terminals 1 and 2

Yes

No current supply

No

SEC202B

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(-)

E9

52 (G)

Ground

When rear window defog-
ger switch ON

0

When rear window defog-
ger switch OFF

Battery 
voltage

PIIA6210E