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- .


Diagnosis Procedure Front Air Control

Regarding Wiring Diagram information, [1][2]Electrical Diagrams.

1. CHECK REAR WINDOW DEFOGGER SWITCH REQUEST SIGNAL

1.Turn ignition switch ON.
2.Check voltage between front air control harness connector and ground.





Is the inspection result normal?
YES- GO TO 4
NO- GO TO 2

2. CHECK REAR WINDOW DEFOGGER SWITCH VOLTAGE SIGNAL

1.Turn ignition switch OFF.
2.Disconnect front air control.
3.Turn ignition switch ON.
4.Check voltage between front air control harness connector and ground.





Is the inspection result normal?
YES- Replace front air control. Service and Repair.
NO- GO TO 3

3. CHECK HARNESS CONTINUITY

1.Turn ignition switch OFF.
2.Disconnect BCM harness connector M18.
3.Check continuity between BCM harness connector M18 terminal 9 and front air control harness connector.





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





Is the inspection result normal?
YES- Replace BCM. Service and Repair.
NO- Repair or replace harness as necessary.

4. CHECK REAR WINDOW DEFOGGER SWITCH INDICATOR CIRCUIT

Check voltage between front air control harness connector and ground.





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