A/C On Signal

A/C ON SIGNAL

Component Function Check


1. CHECK A/C ON SIGNAL

With CONSULT
1.Turn the ignition switch ON.
2.Select the "COMP REQ SIG" in "DATA MONITOR".
3.Check A/C ON signal when the A/C switch is operated.





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


Diagnosis Procedure


1. CHECK A/C SWITCH SIGNAL

1.Turn the ignition switch ON.
2.Check output waveform between A/C auto amp. harness connector and the ground with using oscilloscope.





Is inspection result normal?
YES- GO TO 2.
NO- Replace the A/C auto amp.

2. CHECK CONTINUITY BETWEEN A/C AUTO AMP. AND BCM

1.Turn the ignition switch OFF.
2.Disconnect the A/C auto amp. connector.
3.Disconnect the BCM connector.
4.Check continuity between A/C auto amp. harness connector and BCM harness connector.





Is inspection result normal?
YES- GO TO 3.
NO- Repair the harnesses or connectors.

3. CHECK THE CONTINUITY BETWEEN A/C AUTO AMP. AND GROUND

Check continuity between A/C auto amp. harness connector and ground.





Is inspection result normal?
YES- Replace the BCM. Exploded View (WITH I-KEY) or "Exploded View" (WITHOUT I-KEY).
NO- Repair the harnesses or connectors.