Diagnosis Procedure

REAR WINDOW DEFOGGER


Description

Heats the heating wire with the power supply from the rear window defogger relay to prevent the rear window from fogging up.




REAR WINDOW DEFOGGER


Diagnosis Procedure

1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 20A fuse [No.14*, No.15, located in fuse block (J/B)].
*:Without navigation
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 POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between rear window defogger harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 4.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger connector.
3. Check continuity between rear window defogger harness connector and ground.





Is the inspection result normal?
YES - GO TO 7.
NO - Repair or replace harness.
4.CHECK REAR WINDOW DEFOGGER CIRCUIT 1
1. Turn ignition switch OFF.
2. Disconnect condenser connector and rear window defogger connector.
3. Check continuity between condenser (condenser side) connector and rear window defogger harness connector.





4. Check continuity between condenser (condenser side) connector and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - Replace condenser. Refer to Defogger
5.CHECK REAR WINDOW DEFOGGER CIRCUIT 2
1. Disconnect fuse block (J/B) connector.
2. Check continuity between fuse block (J/B) harness connector and condenser harness connector.





3. Check continuity between fuse block (J/B) harness connector and ground.





*:Without navigation
Is the inspection result normal?
YES - GO TO 6.
NO - Repair or replace harness.
6.CHECK FUSE BLOCK (J/B)
1. Turn ignition switch ON.
2. Check voltage between fuse block (J/B) (fuse block side) and ground.





*:Without navigation
Is the inspection result normal?
YES - GO TO 8.
NO - Repair or replace fuse block (J/B).
7.CHECK FILAMENT
Check filament.
Refer to Component Inspection
Is the inspection result normal?
YES - GO TO 8.
NO - Repair or replace filament. Refer to Filament Check.
8.CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to Intermittent Incident
- INSPECTION END