Diagnosis Procedure

REAR WINDOW DEFOGGER RELAY


Description

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




REAR WINDOW DEFOGGER RELAY


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 - Rear window defogger power supply circuit is OK.
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. Disconnect rear window defogger relay, 2. 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) 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 Intermittent Incident
- INSPECTION END.