A/C Mode Door Input Shorted to Battery - MTC

Test 1 - 2:

SYMPTOM
A/C MODE DOOR INPUT SHORTED TO BATTERY - MTC

WHEN MONITORED
With the engine running.

SET CONDITION
The BCM reads the signal from the A/C - Heater Control mode request and positions the mode door accordingly. If the voltage on this pin exceeds 90% of ignition voltage, the DTC will set, and the BCM will place the mode door in a default position.

POSSIBLE CAUSES
- Control head - A/C mode switch mux shorted to voltage
- A/C mode switch mux circuit shorted to voltage
- Body control module - A/C mode switch mux shorted to voltage