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REAR WINDOW DEFOGGER RELAY DEF-31 < DTC/CIRCUIT DIAGNOSIS > C D E F G H I J K M A B DEF N O P REAR WINDOW DEFOGGER RELAY Description INFOID:0000000009175558 Power is supplied to the rear window defogger with BCM control. Component Function Check INFOID:0000000009175559 1. CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT Check that an operation noise of rear window defogger relay [located in fuse block (J/B)] can be heard when turning the rear window defogger switch ON. YES >> Rear window defogger relay power supply circuit is OK. NO >> Refer to . Diagnosis Procedure INFOID:0000000009175560 Regarding Wiring Diagram information, refer to . 1. CHECK REAR WINDOW DEFOGGER RELAY GROUND CIRCUIT 1. Turn ignition switch ON. 2. Check voltage between BCM connector and ground. Is the inspection result normal? YES >> Rear window defogger power supply circuit is OK. NO >> GO TO 2. 2. CHECK HARNESS CONTINUITY 1. Turn ignition switch OFF. 2. Disconnect BCM and fuse block (J/B). 3. Check continuity between BCM connector and fuse block (J/B) connector. Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace harness. 3. CHECK REAR WINDOW DEFOGGER RELAY Check rear window defogger relay. DEF-32, "Component Inspection" . Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-49, "Intermittent Incident" NO >> Replace rear window defogger relay. (+) (–) Condition Voltage (V) (Approx.) BCM Connector Terminal M19 61 Ground Rear window defogger switch ON 0 OFF Battery voltage BCM Fuse block (J/B) Continuity Connector Terminal Connector Terminal M19 61 M4 6P Yes |