Diagnosis Procedure

A/C ON SIGNAL


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.