Blend Door Feedback Failure

Test 1 - 4:

Test 5 - 7:

Test 8 - 11:

Test 12 - 15:

Test 16 - 18:

Test 19:

SYMPTOM
BLEND DOOR FEEDBACK FAILURE

WHEN MONITORED
Continuously.

SET CONDITION
The BCM detects a loss of signal on the mode feedback and/or blend feedback inputs.

POSSIBLE CAUSES
- 5 volt supply circuit shorted to ground
- 5 volt supply circuit open
- 5 volt supply circuit shorted to sensor ground
- Blend door actuator shorted to sensor ground
- Mode door actuator shorted to sensor ground
- 5 volt supply circuit shorted to sensor ground
- Blend door feedback signal circuit shorted 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 shorted to ground
- Blend door feedback signal circuit open
- Blend door feedback signal circuit shorted to sensor ground
- Body control module - feedback signal open/shorted
- Blend door actuator
- 5 volt supply circuit shorted to voltage
- Body control module-5 volt supply high