Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC B1339: Battery For Door Lock Circuit (Open): Description
When either door lock switch is locked or unlocked, a ground signal is sent to Body Control Module (BCM). When BCM receives signal for doors to lock or unlock (except driver's door), voltage is supplied through circuit No. 1540 (Orange wire) to circuits No. 294 (Tan wire) or No. 295 (Gray wire).
DTC B1339 will set when BCM detects an open in circuit No. 1540 (Orange wire) for more than 0.3 second when BCM commands doors to lock or unlock. No driver warning message will be displayed.
If conditions for malfunction no longer exist, history DTC will clear after 100 consecutive ignition cycles. DTC B1339 will also clear when conditions no longer exist or scan tool is used to clear codes.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.