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
Check that an operation noise of rear window defogger relay [located in fuse block (J/B)] can be heard when turning the rear window defogger switch ON.
Is the inspection result normal?
YES - Rear window defogger relay power supply circuit is OK.
NO - SEE Diagnosis Procedure.




Diagnosis Procedure
Regarding Wiring Diagram information, [1][2]Electrical Diagrams.
1. CHECK REAR WINDOW DEFOGGER RELAY GROUND CIRCUIT





1. Turn ignition switch ON.
2. Check voltage between BCM connector and ground.





Is the inspection result normal?
YES - Rear window defogger power supply circuit is OK.
NO - GO TO 2
2. CHECK HARNESS CONTINUITY





1. Turn ignition switch OFF.
2. Disconnect BCM and fuse block (J/B).
3. Check continuity between BCM connector (A) and fuse block (J/B) connector (B).





Is the inspection result normal?
YES - GO TO 3
NO - Repair or replace harness.
3. CHECK REAR WINDOW DEFOGGER RELAY
Check rear window defogger relay. SEE Component Inspection.
Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Replace rear window defogger relay.




Component Inspection
1. CHECK REAR WINDOW DEFOGGER RELAY





Check rear window defogger relay.





Is the inspection result normal?
YES - Inspection End.
NO - Replace rear window defogger relay.