Mode Door Inoperative

Test 1:

Test 2 - 5:

Test 6 - 10:

Test 11 - 15:

SYMPTOM
MODE DOOR INOPERATIVE

POSSIBLE CAUSES
- BCM EVAC failure pretest
- No response / CCD bus failure (BCM)
- HVAC control head - ground circuit open
- HVAC mode sense circuit open
- Mode door driver (+) circuit short to B+
- Mode door driver (-) circuit short to ground
- HVAC control head mode sense defective
- Mode door driver (+) circuit open
- Mode door driver (-) circuit open
- Mode door driver (-) circuit short to B+
- Mode door actuator drive defective
- Mode door actuator linkage bind
- BCM - mode door driver defective
- BCM mode sense defective
- Mode door actuator default