Rear Window Defogger Switch

REAR WINDOW DEFOGGER SWITCH





Description
- The rear window defogger is operated by turning the rear window defogger switch ON.
- Turns the indicator lamp in the rear window defogger switch ON when operating the rear window defogger.




Component Function Check
1. CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
Check that the indicator lamp of rear window defogger illuminates with rear window defogger switch ON.
Is the inspection result normal?
YES - Rear window defogger switch function is OK.
NO - SEE Diagnosis Procedure Front Air Control (Type 1) or SEE Diagnosis Procedure Front Air Control (Type 2).




Diagnosis Procedure Front Air Control (Type 1)
Regarding Wiring diagram information, [1][2]Electrical Diagrams.
1. CHECK FRONT AIR CONTROL (REAR WINDOW DEFOGGER SWITCH) CIRCUIT
Operate the rear window defogger switch.
Is the inspection result normal?
YES - Inspection End.
NO - GO TO 2
2. CHECK HARNESS CONTINUITY





1. Turn ignition switch OFF.
2. Disconnect BCM and front air control.
3. Check continuity between BCM harness connector M18 (A) terminal 9 and front air control harness connector M50 (B) terminal 16.





4. Check continuity between BCM harness connector M18 (A) terminal 9 and ground.





Is the inspection result normal?
YES - Replace front air control. Service and Repair.
NO - Repair or replace harness.




Diagnosis Procedure Front Air Control (Type 2)
Regarding Wiring diagram information, [1][2]Electrical Diagrams.
1. CHECK FRONT AIR CONTROL (REAR WINDOW DEFOGGER SWITCH) CIRCUIT
Operate the rear window defogger switch.
Is the inspection result normal?
YES - Inspection End.
NO - GO TO 2
2. CHECK HARNESS CONTINUITY





1. Turn ignition switch OFF.
2. Disconnect BCM and front air control.
3. Check continuity between BCM harness connector M18 (A) terminal 9 and front air control harness connector M49 (B) terminal 11





4. Check continuity between BCM harness connector M18 (A) terminal 9 and ground.





Is the inspection result normal?
YES - Replace front air control. Service and Repair.
NO - Repair or replace harness.