Nissan Leaf. Manual - part 373

DEF-26

< DTC/CIRCUIT DIAGNOSIS >

REAR WINDOW DEFOGGER SWITCH

4. Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-72, "Removal and Installation"

.

NO

>> Repair or replace harness. 

3.

CHECK REAR WINDOW DEFOGGER SWITCH GROUND CIRCUIT

Check continuity between A/C auto amp. harness connector and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-187, "Removal and Installation"

 (auto A/C with heat pump)

or 

HAC-347, "Removal and Installation"

 (auto A/C without heat pump).

NO

>> Repair or replace harness.

BCM

Ground

Continuity 

Connector

Terminal

M24

15

Ground

No

A/C auto amp.

Ground

Continuity

Connector

Terminal

M55

10

Ground

Yes

REAR WINDOW DEFOGGER RELAY

DEF-27

< DTC/CIRCUIT DIAGNOSIS >

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REAR WINDOW DEFOGGER RELAY

Component Function Check

INFOID:0000000010119497

1.

CHECK FUNCTION

With CONSULT

1. Select “REAR DEFOGGER” in “Active Test” of “IPDM E/R” using 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 function is OK.

NO

>> Refer to 

DEF-27, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010119498

Regarding Wiring Diagram information, refer to 

DEF-14, "Wiring Diagram"

.

1.

CHECK FUSE

1. Turn power switch OFF.

2. Check that the following fuse is not blown.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit.

2.

CHECK IPDM E/R OUTPUT SIGNAL

1. Turn power switch ON.

2. Check voltage between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-53, "Intermittent Incident"

.

NO

>> Replace IPDM E/R. Refer to 

PCS-29, "Removal and Installation"

.

Location

Fuse No.

Capacity

IPDM E/R

41

15A

42

(+)

(-)

Condition

Voltage (V)

(Approx.)

IPDM E/R

Connector

Terminal

E11

14

Ground

Rear window defogger switch

ON

Battery voltage

OFF

0

DEF-28

< DTC/CIRCUIT DIAGNOSIS >

REAR WINDOW DEFOGGER

REAR WINDOW DEFOGGER

Component Function Check

INFOID:0000000010119499

1.

CHECK FUNCTION

With CONSULT

1. Select “REAR DEFOGGER” in “Active Test” of “IPDM E/R” using 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-28, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010119500

Regarding Wiring Diagram information, refer to 

DEF-14, "Wiring Diagram"

.

1.

CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT

1. Turn power switch OFF.

2. Disconnect rear window defogger connector.

3. Turn power switch ON.

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

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK REAR WINDOW DEFOGGER GROUND CIRCUIT

1. Turn power switch OFF.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK FILAMENT

Refer to 

DEF-37, "Inspection and Repair"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair filament.

4.

CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT 1

1. Turn power switch OFF.

2. Disconnect condenser connector.

3. Check continuity between condenser harness connector and rear window defogger harness connector.

(+)

(-)

Condition 

Voltage (V)

(Approx.)

Rear window defogger

Connector

Terminal 

D565

1

Ground

Rear window defogger switch

ON

Battery voltage

OFF

0

Rear window defogger

Ground

Continuity 

Connector

Terminal

D567

2

Yes

REAR WINDOW DEFOGGER

DEF-29

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

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A

B

DEF

N

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Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness.

5.

CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT 2

1. Disconnect IPDM E/R connectors.

2. Check continuity between IPDM E/R harness connector and condenser harness connector.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness.

6.

CHECK CONDENSER

Refer to 

DEF-29, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace condenser. Refer to 

DEF-39, "Removal and Installation"

.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-53, "Intermittent Incident"

.

>> Inspection End.

Component Inspection

INFOID:0000000010119501

1.

CHECK CONDENSER

1. Turn power switch OFF.

2. Disconnect condenser connector.

3. Check continuity between condenser terminals.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace condenser. Refer to 

DEF-39, "Removal and Installation"

.

Condenser

Rear window defogger

Continuity 

Connector

Terminal

Connector

Terminal

D566

2

D565

1

Yes

IPDM E/R

Condenser

Continuity

Connector

Terminal

Connector Terminal

E11

14

D564

1

Yes

Condenser

Continuity

Terminal

Terminal

1

2

Yes