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

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

1.CHECK BCM OUTPUT SIGNAL

1. Turn ignition switch OFF.

2. Disconnect front air control connector.

3. Check voltage between front air control harness connector and ground.

Is the inspection result normal?

YES >> GO TO 3.

NO >> GO TO 2.

2.CHECK REAR WINDOW DEFOGGER SWITCH CIRCUIT

1. Disconnect BCM connector.

2. Check continuity between BCM harness connector and front air control harness connector.

3. Check continuity between BCM harness connector and ground.

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 >> Repair or replace harness.

3.CHECK GROUND CIRCUIT

Check continuity between front air control harness connector and ground.

Is the inspection result normal?

YES >> GO TO 4.

NO >> Repair or replace harness.

4.CHECK REAR WINDOW DEFOGGER SWITCH

Refer to DEF "Component Inspection".

Is the inspection result normal?

YES >> Check intermittent incident. Refer to GI "Intermittent Incident".

NO >> Replace front air control. Refer to HAC "Removal and Installation".

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