A/C Control Mode Door Input Open or Shorted to Ground

NAME OF CODE
A/C Control Mode Door Input Shorted to Ground (manual HVAC only)

WHEN MONITORED
With ignition on

SET CONDITION
BCM detects an abnormally low voltage or its mode request input

THEORY OF OPERATION
The BCM provides a 5V pull-up to the mode request selector (located on the manual HVAC head), and positions the mode door accordingly. If the voltage on this pin is too low (below 0.1 V), this fault will be set and the BCM will place the mode door in a default position.

PROBABLE CAUSES
- Mode switch MUX circuit short to ground
- Manual HVAC head failure
- BCM failure