A/C On Signal

A/C ON SIGNAL

Component Function Check


1. CHECK A/C ON SIGNAL

With CONSULT
1.Turn ignition switch ON.
2.Operate blower motor.
3.Select "AIR CONDITIONER" of "BCM" using CONSULT.
4.Select "AIR COND SW" in "DATA MONITOR" mode.
5.Check A/C ON signal when the A/C switch is operated.





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


Diagnosis Procedure


1. CHECK A/C ON SIGNAL

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





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

2. CHECK A/C ON SIGNAL CIRCUIT FOR OPEN

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





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

3. CHECK A/C ON SIGNAL CIRCUIT FOR SHORT

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





Is the inspection result normal?
YES- Replace BCM. With Intelligent Key System.
NO- Repair harness or connector.