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 >> Refer to DEF-26, "Diagnosis Procedure".
Diagnosis Procedure
Regarding Wiring Diagram information, refer to DEF-12, "Wiring Diagram".
1. CHECK FUSES
Check if any of the following fuses in fuse block (J/B) are blown.

Is the inspection result normal? YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit.
2. CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT

Is the inspection result normal? YES >> GO TO 3.
NO >> Perform rear window defogger relay diagnosis. Refer to DEF-24, "Diagnosis Procedure".
3. CHECK POWER SUPPLY CIRCUIT

Is the inspection result normal? YES >> GO TO 4.
NO >> GO TO 5.
4. CHECK GROUND CIRCUIT

Is the inspection result normal? YES >> GO TO 6.
NO >> Repair or replace harness.
5. CHECK HARNESS CONTINUITY

Is the inspection result normal? YES >> Replace rear window defogger condenser. Refer to DEF-41, "Removal and Installation".
NO >> Replace or repair harness.
6. CHECK FILAMENT
Check filament.
Refer to DEF-27, "Component Inspection".
Is the inspection result normal? YES >> Refer to GI-41, "Intermittent Incident".
NO >> Repair filament. Refer to DEF-39, "Inspection and Repair".
Component Inspection
1. CHECK FILAMENT
Check the filament for damage or open circuits.
Refer to DEF-39, "Inspection and Repair".
Is the inspection result normal? YES >> Inspection End.
NO >> Repair filament. Refer to DEF-39, "Inspection and Repair".
Rear window defogger relay
Driver side door mirror defoggerWiring diagram
DRIVER ASSISTANCE SYSTEMS
Wiring Diagram
...
Symptom diagnosis
POWER DOOR LOCK SYSTEM SYMPTOMS
Symptom Table
DOOR LOCK/UNLOCK FUNCTION MALFUNCTION
NOTE:
Before performing the diagnosis in the following table, check
“WORK FLOW”. Refer to DLK-312, "Work
Flow".
Check that vehicle is under the condition shown in “Conditions ...
ECU diagnosis information
DIAGNOSIS SENSOR UNIT
DTC Index
DIAGNOSTIC CODE CHART
NOTE:
Follow the procedures in numerical order when repairing malfunctioning parts.
Confirm whether malfunction is
eliminated using air bag warning lamp or CONSULT each time repair is finished.
If malfunction is still
observed, proceed ...