Nissan Versa (N17): Rear window defogger power supply and ground circuit

Nissan Versa 2nd generation (N17) Service Manual / Driver controls / Defogger (DEF) / 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 >> Refer to DEF "Diagnosis Procedure".

Diagnosis Procedure

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

1. CHECK FUSES

Is the inspection result normal?

YES >> GO TO 2

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

2. CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT

1. Turn ignition switch ON.

2. Check voltage between rear window defogger relay connector and ground.

Is the inspection result normal?

YES >> GO TO 3

NO >> Check the following:

Rear window defogger relay.

Battery power supply circuit.

3. CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch ON.

2. Check voltage between rear window defogger connector and ground.

Is the inspection result normal?

YES >> GO TO 4

NO >> GO TO 5

4. CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect rear window defogger.

3. Check continuity between rear window defogger connector and ground.

Is the inspection result normal?

YES >> GO TO 6

NO >> Repair or replace harness.

5. CHECK HARNESS CONTINUITY

1. Turn ignition switch OFF.

2. Disconnect rear window defogger relay connector and rear window defogger.

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

Is the inspection result normal?

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

NO >> Replace or repair harness.

6. CHECK FILAMENT

Check filament.

Refer to DEF "Component Inspection".

Is the inspection result normal?

YES >> Refer to GI "Intermittent Incident".

NO >> Repair filament. Refer to DEF "Inspection and Repair".

Component Inspection

1. CHECK FILAMENT

Check the filament for damage or open circuits.

Refer to DEF "Inspection and Repair".

Is the inspection result normal?

YES >> Inspection End.

NO >> Repair filament. Refer to DEF "Inspection and Repair".

Rear window defogger relay

Description Power is supplied to the rear window defogger with BCM control. ...

Driver side door mirror defogger

Description Heats the heating wire with the power supply from the rear window defogger relay to prevent the door mirror from fogging up. ...

Other materials:

U0155 Lost communication (IPC)
DTC Logic DTC DETECTION LOGIC DTC Trouble diagnosis name DTC detection condition Possible causes U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module When the ignition switch is ON, TCM is unable to receive the CAN communications ...

P074B Unable to engage 3GR
Description This malfunction is detected when the A/T does not shift into 3GR position as instructed by TCM. This is not only caused by electrical malfunction (circuits open or shorted) but by mechanical malfunction such as control valve sticking, improper solenoid valve operation, etc. DTC ...

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