Nissan March K13. Manual - part 70

DEF-18

< DTC/CIRCUIT DIAGNOSIS >

REAR WINDOW DEFOGGER RELAY

REAR WINDOW DEFOGGER RELAY

Component Function Check

INFOID:0000000006067629

1.

CHECK FUNCTION

1.

Turn ignition switch ON.

2.

Check that an operation noise of rear window defogger relay can be heard when turning the rear window
defogger switch ON.

Is the inspection result normal?

YES

>> Rear window defogger relay function is OK.

NO

>> Refer to 

DEF-18, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000006067630

1.

CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF and disconnect rear window defogger relay connector.

2.

Turn ignition switch ON.

3.

Check voltage between rear window defogger relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

Check 10A fuse (No.3).

Is the inspection result normal?

YES

>> Check ignition power supply circuit. Refer to 

PG-19, "Wiring Diagram - IGNITION POWER SUP-

PLY -"

.

NO

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

3.

CHECK REAR WINDOW DEFOGGER RELAY CONTROL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector.

3.

Check continuity between BCM harness connector and rear window defogger relay harness connector.

4.

Check continuity between BCM harness connector and ground.

*1:With intelligent key
*2:Without intelligent key

Is the inspection result normal?

(+)

(

−

)

Voltage

Rear window defogger relay

Connector

Terminal

M91

1

Ground

Battery voltage

BCM

Rear window defogger relay

Continuity 

Connector

Terminal

Connector

Terminal

M68

*1

M67

*2

1

*1

64

*2

M91

2

Existed

BCM

Ground

Continuity 

Connector

Terminal

M68

*1

M67

*2

1

*1

64

*2

Not existed

REAR WINDOW DEFOGGER RELAY

DEF-19

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

DEF

N

O

P

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK REAR WINDOW DEFOGGER RELAY

Refer to 

DEF-19, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-57, "Removal and Installation"

 (with intelligent key) or 

BCS-99,

"Removal and Installation"

 (without intelligent key).

NO

>> Replace rear window defogger relay.

Component Inspection

INFOID:0000000006069111

Check continuity between terminal 3 and 5.

Terminal

Condition

Continuity

3 and 5

12 V direct current supply between terminal 1 
and 2

Existed

No current supply

Not existed

PBIB0098E

DEF-20

< DTC/CIRCUIT DIAGNOSIS >

REAR WINDOW DEFOGGER

REAR WINDOW DEFOGGER

Component Function Check

INFOID:0000000006067632

1.

CHECK FUNCTION

1.

Perform BCM Active Test (“REAR DEFOGGER”) using CONSULT-III.

2.

Touch “ON”.

3.

Check that the rear window heating wire is getting warmer.

Is the inspection result normal?

YES

>> Rear window defogger function is OK.

NO

>> Refer to 

DEF-18, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000006067633

1.

CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch OFF.

2.

Disconnect rear window defogger connector.

3.

Turn ignition switch ON.

4.

Check voltage between rear window defogger harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF and disconnect rear window defogger relay connector.

2.

Check voltage between rear window defogger relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK FUSE

Check 20A fuse (No.10).
Is the inspection result normal?

YES

>> Check battery power supply circuit. Refer to 

PG-10, "Wiring Diagram - BATTERY POWER SUP-

PLY -"

.

NO

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

4.

CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT-II

1.

Check continuity between rear window defogger relay harness connector and rear window defogger har-
ness connector.

(+)

(

−

)

Condition 

Voltage (V)

(Approx.)

Rear window defogger

Connector

Terminal 

B103

1

Ground

Rear window defogger switch

ON

Battery voltage

OFF

0

(+)

(

−

)

Voltage

Rear window defogger relay

Connector

Terminal

M91

3

Ground

Battery voltage

REAR WINDOW DEFOGGER

DEF-21

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

DEF

N

O

P

2.

Disconnect A/C auto amp. (with auto A/C) or A/C control (with manual A/C) connector.

3.

Check continuity between rear window defogger relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace harness.

5.

CHECK REAR WINDOW DEFOGGER 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.

6.

CHECK FILAMENT

Refer to 

DEF-26, "Inspection and Repair"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair filament.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-33, "Intermittent Incident"

>> INSPECTION END

Rear window deffoger relay

Rear window deffoger

Continuity 

Connector

Terminal

Connector

Terminal

M91

5

B103

1

Existed

Rear window deffoger relay

Ground

Continuity 

Connector

Terminal

M91

5

Not existed

Rear window defogger

Ground

Continuity 

Connector

Terminal

B104

2

Existed