Toyota
Nissan Versa
 Sedan Service Manual
Driver controls » Defogger (DEF) » Rear window defogger relay
Diagnosis Procedure

Regarding Wiring Diagram information, refer to DEF "Wiring Diagram".

1.CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF and disconnect rear window defogger relay connector.

2. Turn ignition switch ON.

3. Check voltage between rear window defogger relay harness connector and ground.

Is the inspection result normal?

YES >> GO TO 3.

NO >> GO TO 2.

2.CHECK FUSE

1. Turn ignition switch OFF.

2. Check 10A fuse (No. 5).

Is the inspection result normal?

YES >> Check ignition power supply circuit. Refer to PG "Wiring Diagram - Ignition Power Supply -".

NO >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

3.CHECK REAR WINDOW DEFOGGER RELAY CONTROL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM connector.

3. Check continuity between BCM harness connector and rear window defogger relay harness connector.

4. Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES >> GO TO 4.

NO >> Repair or replace harness.

4.CHECK REAR WINDOW DEFOGGER RELAY

Refer to DEF "Component Inspection".

Is the inspection result normal?

YES >> Replace BCM. Refer to BCS "Removal and Installation" (with Intelligent Key) or BCS "Removal and Installation" (without Intelligent Key).

NO >> Replace rear window defogger relay.

Component Inspection

Check continuity between terminal 3 and 5, 6 and 7.                       

Component Inspection

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    Component Function Check

    Diagnosis Procedure

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