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.
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HOMESERVICE MANUALSSATURN1992SL L4-1.9L SOHC VIN 9REPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLESHIFT INTERLOCKDESCRIPTION AND OPERATIONBRAKE TRANSAXLE SHIFT INTERLOCK (BTSI)
1992 Saturn SL L4-1.9L SOHC VIN 9
Brake Transaxle Shift Interlock (BTSI)
1992 Saturn SL L4-1.9L SOHC VIN 9SECTION Brake Transaxle Shift Interlock (BTSI)
Component Locations:
PURPOSE
The brake transaxle shift interlock (BTSI) system prevents the driver from taking the shift selector lever out of P (Park), with the engine running, unless the brake pedal is depressed.
OPERATION
When the brake pedal is depressed, the brake switch completes the voltage circuit that operates the BTSI solenoid, which allows the shift selector to move out of PARK.
COMPONENTS
The components for the BTSI system consists of the brake switch and a BTSI solenoid which is incorporated into the park lock cable.
RENDER: 1.0x
NO RELATED
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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.