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
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The scan tool displays 0 - 20 Volts. The scan tool displays the voltage as received by the body control module (BCM).
- Shift Lock Solenoid Command
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The scan tool displays Lock/Unlock. The scan tool displays the status of the shift lock control solenoid. Lock indicates that the BCM has applied 12 volts to the control circuit. Unlock indicates that the BCM has removed 12 volts from the control circuit.
Use the Manual With the Right Hardware
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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.