Component Function Check

1.CHECK A/C ON SIGNAL

With CONSULT-III

1. Turn ignition switch ON.

2. Operate blower motor.

3. Select “AIR CONDITIONER” of “BCM” using CONSULT-III.

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 >> Refer to HAC-75, "Diagnosis Procedure".

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. Refer to HAC-91, "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. Refer to BCS-93, "Removal and Installation" (with Intelligent Key) or BCS-161, "Removal and Installation" (without Intelligent Key).

NO >> Repair harness or connector.