A/C Switch

A/C SWITCH

Description

- Each signal is sent to BCM by pressing the A/C switch.
- BCM judges the recognition that A/C switch is ON or OFF according to input switch signal.


Component Function Check


1. CHECK A/C SWITCH SIGNAL

With CONSULT
1.Turn the ignition switch ON.
2.Select the "AIR COND SW" on "DATA MONITOR" in BCM.
3.Check the A/C switch signal when A/C switch is operated.





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


Diagnosis Procedure


1. CHECK A/C SWITCH SIGNAL OUTPUT

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





Is inspection result normal?
YES- GO TO 2.
NO- GO TO 3.

2. CHECK CONTINUITY A/C CONTROL GROUND CIRCUIT

1.Turn the ignition switch OFF.
2.Check continuity between A/C control harness connector and the ground.





Is inspection result normal?
YES- Replace the A/C switch (A/C control).
NO- Repair the harness or connector.

3. CHECK CONTINUITY BETWEEN A/C CONTROL AND BCM

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





Without Intelligent Key





Is inspection result normal?
YES- GO TO 4.
NO- Repair the harness or connector.

4. CHECK CONTINUITY BETWEEN A/C CONTROL AND GROUND

Check continuity between A/C control harness connector and the ground.





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