Infiniti M35/M45 Y50. Manual - part 822

REAR WINDOW DEFOGGER

GW-85

C

D

E

F

G

H

J

K

L

M

A

B

GW

3. 

CHECK REAR WINDOW DEFOGGER RELAY

Check rear window defogger relay.

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.

Install 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.

3.

Check continuity between IPDM E/R connector and rear window defogger relay connector.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace harness.

Terminal

Condition

Continuity

Rear window 

defogger relay

3

5

12V direct current supply between termi-
nals 1 and 2.

Yes

No current supply

No

6

7

12V direct current supply between termi-
nals 1 and 2.

Yes

No current supply

No

SEC202B

Terminals

Condition of 
rear window 

defogger switch

Voltage (V)

(Approx.)

(+)

(–)

IPDM E/R
connector

Terminal 

E9

57

Ground

ON (pressed)

0

OFF

Battery voltage

PIIB5982E

A

B

Continuity 

IPDM E/R
connector

Terminal

Rear window 

defogger relay 

connector

Terminal

E9

57

E36

2

Yes

PIIB5983E

GW-86

REAR WINDOW DEFOGGER

6. 

CHECK REAR WINDOW DEFOGGER RELAY OUTPUT SIGNAL

1.

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

2.

Turn ignition switch ON.

3.

Check voltage between IPDM E/R connector and ground.

OK or NG

OK

>> Check condition of harness and connector.

NG

>> Replace IPDM E/R.

Check Rear Window Defogger Circuit 

NIS0022U

1. 

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch ON.

2.

Check voltage between rear window defogger connector  and ground.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

2. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect rear window defogger connector.

3.

Check continuity between rear window defogger connector and ground.

OK or NG

OK

>> Check filament.  Refer to 

GW-92, "Check Filament"

●

If filament is OK, check condition of harness and con-
nector.

●

If filament is NG, repair filament.

NG

>> Repair or replace harness between rear window defog-

ger and ground.

Terminals

Voltage (V)

(Approx.)

(+)

(–)

IPDM E/R
connector

Terminal 

E9

57

Ground

Battery voltage

PIIB5982E

Terminals

Condition of 
rear window 

defogger switch

Voltage (V)

(Approx.)

(+)

(–)

Rear window 

defogger 

connector

Terminal 

B604

1

Ground

ON

Battery voltage

OFF

0

PIIB5984E

Rear window 

defogger 

connector

Terminal

Ground

Continuity 

B701

2

Yes

PIIB5985E

REAR WINDOW DEFOGGER

GW-87

C

D

E

F

G

H

J

K

L

M

A

B

GW

3. 

CHECK HARNESS CONTINUITY 1

1.

Turn ignition switch OFF.

2.

Disconnect condenser and rear window defogger connector.

3.

Check continuity between condenser and rear window defogger connector.

OK or NG

OK

>> GO TO 4.

NG

>> Replace condenser.

4. 

CHECK HARNESS CONTINUITY 2

1.

Remove rear window defogger relay.

2.

Check continuity between rear window defogger relay connector and condenser connector.

OK or NG

OK

>> Check the condition of harness and connector.

NG

>> Replace or repair harness between rear window defog-

ger relay and condenser.

Check Door Mirror Defogger Power Supply Circuit 

NIS0022V

1. 

CHECK FUSE 

●

Check 10A fuse [No.8, located in fuse block (J/B)]

NOTE:
Refer to 

GW-71, "Component Parts and Harness Connector Location"

 .

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, "POWER SUPPLY ROUTING CIRCUIT"

 .

A

B

Continuity 

Condenser

Terminal

Rear window 

defogger connector

Terminal

1

B604

1

Yes

PIIB5986E

A

B

Continuity 

Rear window 

defogger relay 

connector

Terminal

Condenser

connector

Terminal

E36

5

B49

1

Yes

7

PIIB5987E

GW-88

REAR WINDOW DEFOGGER

2. 

CHECK POWER SUPPLY CIRCUIT 1

1.

Turn ignition switch ON.

2.

Check voltage between fuse block (J/B) connector and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

3. 

CHECK POWER SUPPLY CIRCUIT 2

Check voltage between fuse block (J/B) connector and ground.

OK or NG

OK

>> GO TO 4. 

NG

>> Replace fuse block (J/B).

4. 

CHECK DOOR MIRROR CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect fuse block (J/B) and door mirror connector.

3.

Check continuity between fuse block (J/B) connector and door mirror connector.

4.

Check continuity between fuse block (J/B) connector and
ground.

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace harness between fuse block (J/B) and malfunctioning door mirror connector.

Terminals

Condition of rear 

window defogger 

switch

Voltage (V)

(Approx.)

(+)

(–)

Fuse block

connector

Terminal

E101

2C

Ground

ON

Battery voltage

OFF

0

PIIB5993E

Terminals

Condition of rear 

window defogger 

switch

Voltage (V)

(Approx.)

(+)

(–)

Fuse block

connector

Terminal

M5

5B

Ground

ON

Battery voltage

OFF

0

PIIB5992E

A

B

Continuity 

Fuse block

connector

Terminal

Door mirror

connector

Terminal

M5

5B

D2 (LH)

D39 (RH)

4

Yes

A

Ground

Continuity 

Fuse block connector

Terminal

M5

5B

No

PIIB5988E