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 B251B-00: Bi-Function Head Lamp RH Short To Ground: General Description
Once the Body Control Module (BCM) receives Bi-function head lamp high switch working signal, it sends the signal to the ICU using CAN communication. The ICU turns on the head lamp high or low.
* Bi-function Head Lamp: A headlamp with integrated functions of high and low beam. The light is controlled by rotating the shield inserted to the lens.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.