Blend Door Stall Test Failure

Test 1 - 4:

Test 5 - 8:

Test 9 - 12:

Test 13 - 17:

Test 18:

SYMPTOM
BLEND DOOR STALL TEST FAILURE

TEST NOTE
This symptom is diagnosed using the test BLEND DOOR FEEDBACK FAILURE.

WHEN MONITORED
During HVAC motor calibration.

SET CONDITION
The BCM is unable to detect the end of travel for Blend Door.

POSSIBLE CAUSES
- Blend door feedback signal circuit short to battery
- Body control module
- Mode door actuator
- Sensor ground wire open
- Blend door feedback signal circuit open
- Common door driver wire open
- Blend air door driver wire open
- Blend door feedback signal circuit short to ground.
- 5 volt supply circuit open
- 5 volt supply circuit short to ground.
- 5 volt supply circuit short to voltage
- 5 volt supply circuit short to sensor ground
- Blend door actuator shorted to sensor ground
- Blend air door actuator
- Blend air door actuator
- Body control module-blend door driver
- Body control module-common door driver
- Body control module