Rear Window Defogger Power Supply And Ground Circuit
REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
Description
Heats the heating wire with the power supply from the rear window defogger relay to prevent the rear window from fogging up.
Component Function Check
1. CHECK REAR WINDOW DEFOGGER
Check that the heating wire of rear window defogger is heated when turning the rear window defogger switch
ON.
Is the inspection result normal?
YES - Rear window defogger is OK.
NO - SEE Diagnosis Procedure.
Diagnosis Procedure
Regarding Wiring Diagram information, [1][2]Electrical Diagrams.
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between rear window defogger harness connector B165 terminal 1 and ground.
Is the inspection result normal?
YES - GO TO 2
NO - GO TO 3
2. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger.
3. Check continuity between rear window defogger harness connector B210 terminal 2 and ground.
Is the inspection result normal?
YES - GO TO 4
NO - Repair or replace harness as necessary.
3. CHECK HARNESS CONTINUITY
1. Disconnect IPDM E/R.
2. Check continuity between rear window defogger harness connector B165 (A) terminal 1 and IPDM E/R harness connector
E124 (B) terminal 60.
3. Check continuity between rear window defogger harness connector B165 (A) terminal 1 and ground.
Is the inspection result normal?
YES - GO TO 5
NO - Replace or repair harness.
4. CHECK FILAMENT
Check filament. SEE Component Inspection.
Is the inspection result normal?
YES - Intermittent Incident.
NO - Repair filament. Service and Repair.
5. CHECK INTERMITTENT INCIDENT
Check intermittent incident. Intermittent Incident.
Is the inspection result normal?
YES - Check the following.
- Battery power supply circuit
- IPDM E/R
NO - Repair or replace the malfunctioning parts.
Component Inspection
1. CHECK FILAMENT
Check the filament for damage or open circuits. Filament.
Is the inspection result normal?
YES - Inspection End.
NO - Repair filament. Service and Repair.