Driver Door Unlock/Disarm Circuit Open
The Body Control Module (BCM) or Central Security Module has detected an open circuit in the driver door unlock/disarm output. This circuit controls the door lock actuator or lock cylinder switch to disarm the anti-theft system and unlock the doors. The fault indicates that the control signal is not reaching its destination due to a break in the wiring or a failed component.
1. Commonly Affected Makes
2. Most Common Causes
- Open circuit in the wiring harness between the BCM and the driver door actuator/switch
- Loose, corroded, or damaged connector at the driver door or BCM
- Driver door lock actuator with an open coil
- Internal failure of the Body Control Module (BCM)
3. Symptoms You Will Notice
- Driver door may not unlock with remote or interior switch
- Anti-theft system may not disarm when unlocking driver door
4. Step-by-Step Diagnosis
Check for broken or damaged wires in the driver door harness, especially at the hinge area.
Inspect connectors at the BCM and driver door for corrosion, bent pins, or poor contact.
Test the driver door lock actuator and lock cylinder switch for continuity and proper operation.
If all wiring and components check out, suspect a faulty BCM and perform a module self-test or replacement.
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, the vehicle is generally safe to drive, but you may experience inconvenience with door locking/unlocking and the anti-theft system. It is recommended to repair the issue to ensure full functionality.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on whether the issue is a simple wiring repair, a connector replacement, or a BCM replacement.