A/C Mode Door Input Open/Shorted to Ground - MTC

Test 1 - Test 2:

Test 3 - Test 5:

Test 6:

SYMPTOM
A/C MODE DOOR INPUT OPEN/SHORT TO GROUND - MTC

WHEN MONITORED
With the ignition on.

SET CONDITION
The A/C - Heater Control provides a 5 volt pull-up to the mode request selector. 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 is below 0.1 volts, the DTC will set, and the BCM will place the mode door in a default position.

POSSIBLE CAUSES
- Additional code(s) present
- Fused ignition switch output circuit open
- A/C mode switch MUX circuit short ground
- A/C mode switch MUX circuit short sensor ground
- A/C mode switch MUX circuit open
- Control head - mode switch MUX open/shorted to ground
- Body control module - mode switch MUX open/shorted to ground