Coupe

REAR WINDOW DEFOGGER RELAY

Description

Power is supplied to the rear window defogger with BCM control.


Component Function Check


1. CHECK FUNCTION

With CONSULT
1.Turn ignition switch ON.
2.Select "REAR DEFOGGER" of "BCM" using CONSULT.
3.Select "REAR DEFOGGER" in "ACTIVE TEST" mode.
4.Touch "ON".
5.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- .


Diagnosis Procedure


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 RELAY 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.
NO- GO TO 3.

3. CHECK REAR WINDOW DEFOGGER RELAY 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.





4.Check continuity between BCM harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace harness.

4. CHECK REAR WINDOW DEFOGGER RELAY

1.Remove rear window defogger relay, 2.Check rear window defogger relay.

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) (fuse block side) and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace fuse block (J/B).

6. CHECK INTERMITTENT INCIDENT

Check intermittent incident.
Intermittent Incident Regular Grade.
- INSPECTION END


Component Inspection


1. CHECK REAR WINDOW DEFOGGER RELAY

1.Turn ignition switch OFF.
2.Remove rear window defogger relay.
3.Check continuity between rear window defogger relay terminals.










Is the inspection result normal?
YES- INSPECTION END
NO- Replace rear window defogger relay.