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.
Brake Transmission Shift Interlock Solenoid
The gearshift lever cannot be moved from the Park position without simultaneously applying the brake pedal with ignition switch turned to the ON position. When the brake pedal is applied, the stoplamp switch completes the circuit to the BTSI solenoid. Energizing the BTSI solenoid unlocks gearshift lever from Park position. See WIRING DIAGRAMS .
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.