Nissan Frontier D22. Manual - part 763

GW-32

REAR WINDOW DEFOGGER

Trouble Diagnoses

EIS002D3

REAR WINDOW DEFOGGER DOES NOT ACTIVATE, OR DOES NOT TURN OFF AFTER ACTI-
VATING
Models without Power Door Locks

1. 

CHECK REAR WINDOW DEFOGGER OUTPUT SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between rear window defogger timer harness connector M122 terminal 2 (G/R) and
ground.

OK or NG

OK

>> Check the following.

●

Rear window defogger relay
Refer to 

GW-37, "REAR WINDOW DEFOGGER RELAY"

 .

●

Rear window defogger circuit
Refer to 

GW-30, "WITHOUT POWER DOOR LOCKS"

 .

●

Rear window defogger filament
Refer to 

GW-38, "Filament Check"

 .

NG

>> GO TO 2.

LEL257A

REAR WINDOW DEFOGGER

GW-33

C

D

E

F

G

H

J

K

L

M

A

B

GW

2. 

CHECK DEFOGGER RELAY COIL SIDE CIRCUIT

1.

Disconnect rear window defogger timer harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between rear window defogger timer harness connector M122 terminal 2 (G/R) and
ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check the following.

●

10A fuse [No. 5, located in the fuse block (J/B)]

●

Rear window defogger relay
Refer to 

GW-37, "REAR WINDOW DEFOGGER RELAY"

 .

●

Harness for open or short between rear window defogger relay and rear window defogger timer

●

Harness for open or short between rear window defogger relay and fuse

3. 

CHECK REAR WINDOW DEFOGGER SWITCH INPUT SIGNAL

Check continuity between rear window defogger timer harness connector M122 terminal 3 (G/B) and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Check the following.

●

Rear window defogger switch (within the air control)
Refer to 

GW-37, "REAR WINDOW DEFOGGER SWITCH"

 .

●

Harness for open or short between rear window defogger timer and air control (rear window
defogger switch)

●

Air control (rear window defogger switch) ground circuit

LEL256A

LEL260A

GW-34

REAR WINDOW DEFOGGER

4. 

CHECK IGNITION INPUT SIGNAL

Check voltage between rear window defogger timer harness connector M122 terminal 1 (G/W) and ground.

OK or NG

OK

>> GO TO 5.

NG

>> Check the following.

●

10A fuse [No. 5, located in the fuse block (J/B)]

●

Harness for open or short between rear window defogger timer and fuse

5. 

CHECK CONTROL UNIT GROUND CIRCUIT

Check continuity between rear window defogger timer harness connector M122 terminal 4 (B) and ground.

OK or NG

OK

>> Replace rear window defogger timer.

NG

>> Repair harness or connectors.

LEL259A

LEL258A

REAR WINDOW DEFOGGER

GW-35

C

D

E

F

G

H

J

K

L

M

A

B

GW

Models with Power Door Locks

1. 

CHECK REAR WINDOW DEFOGGER OUTPUT SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between smart entrance control unit harness connector M111 terminal 37 (G/R) and
ground.

OK or NG

OK

>> Check the following.

●

Rear window defogger relay
Refer to 

GW-37, "REAR WINDOW DEFOGGER RELAY"

 .

●

Rear window defogger circuit
Refer to 

GW-31, "WITH POWER DOOR LOCKS"

 .

●

Rear window defogger filament
Refer to 

GW-38, "Filament Check"

 .

NG

>> GO TO 2.

2. 

CHECK DEFOGGER RELAY COIL SIDE CIRCUIT

1.

Disconnect smart entrance control unit harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between smart entrance control unit harness connector M111 terminal 37 (G/R) and
ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check the following.

●

10A fuse [No. 5, located in the fuse block (J/B)]

●

Rear window defogger relay
Refer to 

GW-37, "REAR WINDOW DEFOGGER RELAY"

 .

●

Harness for open or short between rear window defogger relay and smart entrance control unit

●

Harness for open or short between rear window defogger relay and fuse

LEL013A

WEL516A