Manual Air Conditioning

BLOWER FAN ON SIGNAL

Component Function Check


1. CHECK BLOWER FAN ON SIGNAL

With CONSULT
1.Turn the ignition switch ON.
2.Select the "FAN ON SIG" on "DATA MONITOR" in BCM.
3.Check the fan ON signal when the fan control dial is operated.





Is inspection result normal?
YES- INSPECTION END
NO- .


Diagnosis Procedure


1. CHECK BLOWER FAN ON SIGNAL OUTPUT

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





Is inspection result normal?
YES- Replace the fan switch (A/C control).
NO- GO TO 2.

2. CHECK CONTINUITY BETWEEN FAN SWITCH AND BCM

1.Turn the ignition switch OFF.
2.Disconnect the BCM connector.
3.Check continuity between fan switch harness connector and BCM harness connector.
With Intelligent Key





Without Intelligent Key





Is inspection result normal?
YES- GO TO 3.
NO- Repair the harness or connector.

3. CHECK CONTINUITY BETWEEN FAN SWITCH AND GROUND

Check continuity between fan switch harness connector and the ground.





Is inspection result normal?
YES- Replace the BCM. Exploded View.
NO- Repair the harness or connector.