Rear Window Defogger Relay

REAR WINDOW DEFOGGER RELAY

Description

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


Component Function Check


1. CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT

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 relay power supply circuit is OK.
NO- Refer to "Diagnosis Procedure" .


Diagnosis Procedure


1. CHECK FUSE

1.Turn ignition switch off.
2.Check the following.
-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.
NO- GO TO 3.

3. CHECK REAR WINDOW DEFOGGER CIRCUIT 2

1.Turn ignition switch OFF.
2.Disconnect BCM connector and rear window defogger relay.
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

Check rear window defogger relay.
Refer to "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) (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.
Refer to "Intermittent Incident" Intermittent Incident
- INSPECTION END.


Component Inspection


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.