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.
Body Control Module: Notes
Body Control Module (BCM) controls many features and systems. By monitoring inputs signals which are hard wired directly to BCM and requests from other control modules connected to class 2 data bus circuit, BCM will send appropriate output commands to operate body features and components based on input signals and requests. BCM also retains feature customization settings for interior light illumination and power door lock operations specifically programmed for driver. Standard BCM (type 2) can control programmed interior and exterior lighting and power door locks when entering or exiting vehicle. Premium BCMs (type 3 or 4) can be programmed for optional equipment features. All models can be programmed to perform the following standard feature customization settings.
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.
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