Nissan Versa (N17): Blower fan on signal

Nissan Versa 2nd generation (N17) Service Manual / Ventilation, heater & air conditioner / Heater & air conditioning control system (HAC) / Blower fan on signal

Component Function Check

1.CHECK BLOWER FAN ON SIGNAL

With CONSULT

  1. Turn ignition switch ON.
  2. Select "AIR CONDITIONER" of "BCM" using CONSULT.
  3. Select "FAN ON SIG" in "DATA MONITOR" mode, and check status under the following condition.

Is the inspection result normal?

YES >> Inspection End.

NO >> Refer to HAC "Diagnosis Procedure".

Diagnosis Procedure

Regarding Wiring Diagram information, refer to HAC "Wiring Diagram" or HAC "Wiring Diagram".

1.CHECK BLOWER FAN ON SIGNAL

  1. Turn ignition switch OFF.
  2. Disconnect front air control harness connector.
  3. Turn ignition switch ON.
  4. Check output waveform between front air control and ground with using oscilloscope.

Is the inspection result normal?

YES >> Replace front air control. Refer to HAC "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 front air control harness connector and BCM harness connector.

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 front air control harness connector and ground.

Is the inspection result normal?

YES >> Replace BCM. Refer to BCS "Removal and Installation" or BCS "Removal and Installation".

NO >> Repair harness or connector.

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