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-III
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 - SEE Diagnosis Procedure.




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.






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.