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 (BCM)
- Battery Voltage Signal
-
The scan tool displays 0 - 20 volts. The scan tool displays the voltage as received by the body control module (BCM).
- Brake Lamp Cmd.
-
The scan tool displays On and Off. The scan tool displays the status of the brake switch to the BCM.
- BTSI Solenoid
-
The scan tool displays On and Off. The scan tool displays the status of the BTSI solenoid to the BCM.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.