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
-
Display indicates battery voltage. Measured in volts.
- Brake to Shift Relay
-
Displays indicates ON when the body control module a ground to the automatic transmission shift lock control solenoid A/T shift lock control circuit.
- BTSI Output
-
Display indicates ON when the Brake to Shift Relay is ON.
- Ignition 1
-
Display indicates ON when the ignition 1 input circuit of the module receives a battery signal from the ignition switch.
- Park (BTSI) Output Feed
-
Display indicates ON when the Brake to Shift Relay is ON.
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.