A/C Control Mode Door Input Shorted to Ground

Test 1 - 3:

SYMPTOM
A/C CONTROL MODE DOOR INPUT SHORTED TO GROUND

WHEN MONITORED
With ignition ON.

SET CONDITION
When the BCM detects an abnormally low voltage on its mode request input.

POSSIBLE CAUSES
- Mode switch MUX circuit short to ground
- Control head - short to ground
- Body control module - mode switch MUX short to ground