Component Tests and General Diagnostics

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.




Diagnosis Procedure
Regarding Wiring Diagram information, [1][2]Electrical Diagrams.
1. CHECK A/C AND AV SWITCH ASSEMBLY (REAR WINDOW DEFOGGER SWITCH) CIRCUIT
Check rear window defogger switch operation.
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 A/C and AV switch assembly.
3. Check continuity between BCM connector M18 (A) terminal 9
16. and A/C and AV switch assembly connector M98 (B) terminal





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





Is the inspection result normal?
YES - Replace A/C and AV switch assembly. Service and Repair.
NO - Repair or replace harness.