Nissan Juke Service and Repair Manual : Blower fan on signal

Component Function Check

1.CHECK BLOWER FAN ON SIGNAL

1. Turn ignition switch ON.With CONSULT-III


1. Turn ignition switch ON.

2. Select AIR CONDITIONER of BCM using CONSULT-III.

3. Select FAN ON SIG in DATA MONITOR mode, and check status under the following condition.

Is the inspection result normal?


Is the inspection result normal? YES >> INSPECTION END

NO >> Refer to HAC-222, "Diagnosis Procedure".

Diagnosis Procedure

1.CHECK FAN SWITCH POWER SUPPLY SIGNAL

1. Turn ignition switch OFF.

2. Disconnect A/C control harness connector.

3. Turn ignition switch ON.

4. Check output waveform between A/C control and ground with using oscilloscope.

Is the inspection result normal?


Is the inspection result normal? YES >> Replace A/C control. Refer to HAC-239, "Removal and Installation".

NO >> GO TO 2.

2.CHECK BLOWER FAN ON SIGNAL CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect BCM connector.

3. Check continuity A/C control harness connector and BCM harness connector.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 3.

NO >> Repair harness or connector.

3.CHECK BLOWER FAN ON SIGNAL CIRCUIT FOR SHORT

Check continuity between A/C control harness connector and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> Replace BCM. Refer to BCS-93, "Removal and Installation" (with Intelligent Key) or BCS-161, "Removal and Installation" (without Intelligent Key).

NO >> Repair harness or connector.

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