Common Output Shorted to Ground

Test 1 - 2:

Test 3 - 4:

SYMPTOM
COMMON OUTPUT SHORTED TO GROUND

WHEN MONITORED
Whenever the BCM attempts to move one of the HVAC actuators.

SET CONDITION
When the BCM detects one or more of the following outputs shorted to ground: mode door driver, blend door driver, recirculation door driver or the common door driver.

POSSIBLE CAUSES
- Common door driver circuit shorted to ground
- Common door driver circuit shorted to sensor ground
- Blend door actuator shorted to common door driver circuit
- Mode door actuator shorted to common door driver circuit
- Common door driver wire shorted to sensor ground