Nissan Quest E52. Manual - part 317

DEF-22

< DTC/CIRCUIT DIAGNOSIS >

REAR WINDOW DEFOGGER SWITCH

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK REAR WINDOW DEFOGGER SWITCH CIRCUIT

1.

Disconnect BCM connector.

2.

Check continuity between BCM harness connector and A/C amp. harness connector.

3.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-98, "Removal and Installation"

.

NO

>> Repair or replace harness.

4.

REPLACE A/C AMP.

1.

Turn ignition switch OFF.

2.

Replace A/C amp.

3.

Turn ignition switch ON.

4.

Operate rear window defogger switch and check the operating condition.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> GO TO 5.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

>> INSPECTION END

(+)

(-)

Voltage

(Approx.)

A/C amp.

Connector

Terminal

M49

27

Ground

JPMIA0012GB

BCM

A/C amp.

Continuity

Connector

Terminal

Connector

Terminal

M121

15

M49

27

Existed

BCM

Ground

Continuity

Connector

Terminal

M121

15

Not existed

REAR WINDOW DEFOGGER RELAY

DEF-23

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

DEF

N

O

P

REAR WINDOW DEFOGGER RELAY

Component Function Check

INFOID:0000000009650824

1.

CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT

1.

Perform BCM Active Test (“REAR DEFOGGER”) with CONSULT.

2.

Touch “ON”.

3.

Check that the rear window heating wire is getting warmer.

Is the inspection result normal?

YES

>> Rear window defogger relay power supply circuit function is OK.

NO

>> Refer to 

DEF-23, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009650825

1.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

Check 10A fuse [No.3, located in fuse block (J/B)].

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.

2.

CHECK REAR WINDOW DEFOGGER CIRCUIT 1

1.

Turn ignition switch ON.

2.

Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

Fixed at 0 V>>GO TO 3.
Fixed at 9 

−

 16 V >>Replace BCM. Refer to 

BCS-98, "Removal and Installation"

.

3.

CHECK REAR WINDOW DEFOGGER CIRCUIT 2

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector and fuse block (J/B).

3.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK REAR WINDOW DEFOGGER RELAY 1

Check rear window defogger relay.
Refer to 

DEF-24, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace rear window defogger relay.

5.

CHECK FUSE BLOCK (J/B)

(+)

(–)

 Condition

Voltage (V)

(Approx.)

BCM

 Connector

Terminal 

M121

1

Ground

Rear window de-
fogger switch

ON 0 

OFF

Battery voltage

BCM 

Fuse block (J/B)

Continuity 

Connector

Terminal

Connector

Terminal

M121

1

M2

4B

Existed

DEF-24

< DTC/CIRCUIT DIAGNOSIS >

REAR WINDOW DEFOGGER RELAY

1.

Install the rear window defogger relay.

2.

Turn ignition switch ON.

3.

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

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace fuse block (J/B). 

6.

CHECK REAR WINDOW DEFOGGER RELAY 2

Check rear window defogger relay.
Refer to 

DEF-24, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace rear window defogger relay.

7.

CHECK INTERMITTENT INCIDENT

Check intermittent incident.
Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009650826

1.

CHECK REAR WINDOW DEFOGGER RELAY

1.

Turn ignition switch OFF.

2.

Disconnect rear window defogger relay.

3.

Check rear window defogger relay.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace rear window defogger relay.

(+)

(–)

Voltage (V)

(Approx.)

Fuse block (J/B)

 Connector

Terminal 

M2

4B

Ground

Battery voltage

Rear window 

defogger relay

Condition

Continuity

Terminal

3

5

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

Existed

No current supply

Not existed

SEF497Y

REAR WINDOW DEFOGGER

DEF-25

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

DEF

N

O

P

REAR WINDOW DEFOGGER

Component Function Check

INFOID:0000000009650827

1.

CHECK REAR WINDOW DEFOGGER

1.

Perform Active Test (“REAR DEFOGGER”) with CONSULT.

2.

Touch “ON”.

3.

Check that the rear window heating wire is getting warmer.

Is the inspection result normal?

YES

>> Rear window defogger is OK.

NO

>> Refer to 

DEF-25, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009650828

1.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

Check 20A fuse [No.15, located in fuse block (J/B)].

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.

2.

CHECK POWER SUPPLY CIRCUIT

1.

Disconnect rear window defogger harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between rear window defogger connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between rear window defogger harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness or connector between rear window defogger and ground.

4.

CHECK REAR WINDOW DEFOGGER CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect fuse block (J/B) harness connector.

3.

Check continuity between fuse block (J/B) harness connector and rear window defogger harness connec-
tor.

(+)

(-)

Condition

Voltage (V)

(Approx.)

Rear window defogger

Connector

Terminal 

D184

1

Ground

Rear window defogger 
switch

ON

Battery voltage

OFF

0

Rear window defogger 

Ground

Continuity 

Connector

Terminal

D185

2

Existed