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 B1483: Battery Rundown Protection Circuit High (Impala & Monte CARLO): Description
In order to minimize battery rundown, BCM can detect if certain electrical loads are left on. When BCM detects ignition has been cycled to OFF position, BCM immediately check status of load monitor input circuit. If BCM detects a load exists, BCM will keep battery rundown protection relay on for 10 minutes by grounding battery rundown protection relay circuit. If after 10 minutes BCM still detects a load exists, BCM will turn off battery rundown protection relay, removing battery voltage from load(s). BCM will continue to monitor load monitor input circuit for a switch transition. If a switch transition exists, BCM will turn on relay again for 10 minutes.
DTC B1483 will set and store in memory if BCM is commanding battery rundown protection relay to de-energize and detects a short to power for longer than 0.3 seconds. A current DTC B1483 will clear if short to power in battery rundown protection relay control circuit is no longer detected. A history DTC B1483 will clear after 100 consecutive ignition cycles if condition for malfunction no longer exists. A scan tool can be used to clear DTC B1483.
NO RELATED
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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.