Defroster Position Signal

DEFROSTER POSITION SIGNAL

Description

- Each signal is sent to BCM by setting the D/F or DEF position.
- BCM judges the change of the air inlet and recognition of A/C switch ON or OFF according to input switch signal.


Component Function Check


1. CHECK DEFROSTER POSITION SIGNAL

With CONSULT
1.Turn the ignition switch ON.
2.Select the "FR DEF 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 VOLTAGE BETWEEN A/C CONTROL AND GROUND

1.Turn the ignition switch OFF.
2.Disconnect the A/C control connector.
3.Turn the ignition switch ON.
4.Check voltage between A/C control harness connector and the ground.





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

2. 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 3.
NO- Repair the harness or connector.

3. 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.