Infiniti FX35, FX50 (S51). Manual - part 454

DEF-12

< DTC/CIRCUIT DIAGNOSIS >

REAR WINDOW DEFOGGER RELAY

4.

CHECK REAR WINDOW DEFOGGER RELAY

1.

Disconnect rear window defogger relay,

2.

Check rear window defogger relay.

       Refer to 

DEF-12, "Component Inspection"

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace rear window defogger relay.

5.

CHECK FUSE BLOCK (J/B)

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 6.

NO

>> Replace fuse block (J/B). 

6.

CHECK INTERMITTENT INCIDENT

Check intermittent incident.
Refer to 

GI-36, "Intermittent Incident"

>> INSPECTION END.

Component Inspection

INFOID:0000000005249366

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-13

< DTC/CIRCUIT DIAGNOSIS >

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REAR WINDOW DEFOGGER

Description

INFOID:0000000005249367

Heats the heating wire with the power supply from the rear window defogger relay to prevent the rear window
from fogging up.

Component Function Check

INFOID:0000000005249368

1.

CHECK REAR WINDOW DEFOGGER

1.

Perform 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 is OK.

NO

>> Refer to 

DEF-13, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000005249369

1.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

Check the following items.

-

20A fuse [No.14, located in fuse block (J/B)]

-

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.

Turn ignition switch ON.

2.

Check voltage between rear window defogger harness 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.

Disconnect rear window defogger connector.

3.

Check continuity between rear window defogger harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace harness .

4.

CHECK REAR WINDOW DEFOGGER CIRCUIT 1

(+)

(–)

Condition 

Voltage (V)

(Approx.)

Rear window defogger

Connector

Terminal 

D108

1

Ground

Rear window defogger switch: ON

Battery voltage

Rear window defogger switch: OFF

0

Rear window defogger 

Ground

Continuity 

Connector

Terminal

D120

2

Existed

DEF-14

< DTC/CIRCUIT DIAGNOSIS >

REAR WINDOW DEFOGGER

1.

Turn ignition switch OFF.

2.

Disconnect condenser connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness.

5.

CHECK REAR WINDOW DEFOGGER CIRCUIT 2

1.

Disconnect fuse block (J/B) connector.

2.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness.

6.

CHECK FUSE BLOCK (J/B)

1.

Turn ignition switch ON.

2.

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

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace fuse block (J/B).

7.

CHECK CONDENSER

Check condenser. Refer to 

DEF-15, "Component Inspection"

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace condenser.

8.

CHECK FILAMENT

Check the filament for damage or blown.
Refer to 

DEF-72, "Inspection and Repair"

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair filament.

9.

CHECK INTERMITTENT INCIDENT

Check intermittent incident.
Refer to 

GI-36, "Intermittent Incident"

Condenser

Rear window defogger

Continuity 

 Connector

Terminal

Connector

Terminal

D104

2

D108

1

Existed

Fuse block (J/B)

Condenser

Continuity 

 Connector

Terminal

Connector

Terminal

B6

10G

D105

1

Existed

11G

(+)

(–)

Condition

Voltage (V)

(Approx.)

Fuse block (J/B)

Connector

Terminal 

B6

10G

Ground

Rear window defogger switch: ON

Battery voltage

Rear window defogger switch: OFF

0

11G

Rear window defogger switch: ON

Battery voltage

Rear window defogger switch: OFF

0

REAR WINDOW DEFOGGER

DEF-15

< DTC/CIRCUIT DIAGNOSIS >

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DEF

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>> INSPECTION END

Component Inspection

INFOID:0000000005249370

1.

CHECK CONDENSER

1.

Check continuity between condenser connector and ground part of condenser.

2.

Check condenser terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair condenser.

Condenser

Ground part of 

condenser

Continuity

Connector

Terminal

D105

1

Not existed

D104

2

Condenser

Continuity

Connector

Terminal

Connector

Terminal

D105

1

D104

2

Existed