Nissan Frontier D22. Manual - part 764

GW-36

REAR WINDOW DEFOGGER

3. 

CHECK REAR WINDOW DEFOGGER SWITCH INPUT SIGNAL

Check continuity between smart entrance control unit harness connector M110 terminal 14 (G/B) and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Check the following.

●

Rear window defogger switch (within air control)
Refer to 

GW-37, "REAR WINDOW DEFOGGER SWITCH"

 .

●

Harness for open or short between smart entrance control unit and air control (rear window
defogger switch)

●

Air control (rear window defogger switch) ground circuit

4. 

CHECK IGNITION INPUT SIGNAL

Check voltage between smart entrance control unit harness connector M111 terminal 27 (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 smart entrance control unit and fuse

LEL015A

LEL016A

REAR WINDOW DEFOGGER

GW-37

C

D

E

F

G

H

J

K

L

M

A

B

GW

5. 

CHECK CONTROL UNIT GROUND CIRCUIT

Check continuity between smart entrance control unit harness connector M111 terminal 43 (B) and ground,
and connector M112 terminal 64 (B) and ground.

OK or NG

OK

>> Replace smart entrance control unit.

NG

>> Repair harness or connectors.

Electrical Components Inspection

EIS002D4

REAR WINDOW DEFOGGER RELAY

Check continuity between terminals 3 and 5.

REAR WINDOW DEFOGGER SWITCH

Check continuity between terminals when rear window defogger
switch is pushed and released.

WEL484A

Condition

Continuity

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

Yes

No current supply

No

SEF090M

Terminals

Condition

Continuity

(+)

(–)

Connector

Terminal

Connector

Terminal

M95

5

M95

8

Rear window 
defogger switch is 
pushed

Yes

Rear window 
defogger switch is 
released

No

WEL831A

GW-38

REAR WINDOW DEFOGGER

Filament Check

EIS002D5

1.

Attach probe circuit tester (in volt range) to middle portion of
each filament.

●

When measuring voltage, wrap tin foil around the top of
the negative probe. Then press the foil against the wire
with your finger.

2.

If a filament is burned out, circuit tester registers 0 or 12 volts.

SEL263

SEL122R

SEL265

REAR WINDOW DEFOGGER

GW-39

C

D

E

F

G

H

J

K

L

M

A

B

GW

3.

To locate burned out point, move probe to left and right along fil-
ament. Test needle will swing abruptly when probe passes the
point.

Filament Repair

EIS002D6

REPAIR EQUIPMENT

1.

Conductive silver composition (Dupont No. 4817 or equivalent)

2.

Ruler 30 cm (11.8 in) long

3.

Drawing pen

4.

Heat gun

5.

Alcohol

6.

Cloth

REPAIRING PROCEDURE

1.

Wipe broken heat wire and its surrounding area clean with a
cloth dampened in alcohol.

2.

Apply a small amount of conductive silver composition to tip of
drawing pen.

Shake silver composition container before use.

3.

Place ruler on glass along broken line. Deposit conductive silver
composition on break with drawing pen. Slightly overlap existing
heat wire on both sides [preferably 5 mm (0.20 in)] of the break.

4.

After repair has been completed, check repaired wire for conti-
nuity. This check should be conducted 10 minutes after silver
composition is deposited.

Do not touch repaired area while test is being conducted.

5.

Apply a constant stream of hot air directly to the repaired area
for approximately 20 minutes with a heat gun. A minimum dis-
tance of 3 cm (1.2 in) should be kept between repaired area and
hot air outlet. If a heat gun is not available, let the repaired area
dry for 24 hours.

SEL266

BE540

SEL012D

SEL013D