A/C Control EBL Switch Failure (MTC)

Tests 1 - 3:

Tests 4 - 8:

SYMPTOM
A/C CONTROL EBL SWITCH FAILURE (MANUAL A/C)

WHEN MONITORED
With the ignition ON.

SET CONDITION
The BCM detects the EBL switch stuck in the depressed position for at least 30 seconds.

POSSIBLE CAUSES
- Control head short to ground
- Mode switch MUX circuit short to ground
- Mode switch MUX circuit short to sensor ground
- Body control module - mode switch MUX short to ground
- Control head - button sticks
- Control head - mode MUX incorrect
- Control head - open switch
- Control head switches okay