Blend Door Stall Test Failure

Tests 1 - 4:

Tests 5 - 7:

Tests 8 - 11:

Tests 12 - 15:

Tests 16 - 18:

Test 19:

SYMPTOM
BLEND DOOR STALL TEST FAILURE

WHEN MONITORED
During HVAC motor calibration.

SET CONDITION
The BCM is unable to detect the end of travel for the blend door.

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