Shift Interlock Systems: Description

The Transmission shift interlock system prevents driver from moving gear selector from Park unless ignition switch is turned to ON position, and also prevents ignition key from being removed until gear selector is returned to Park. Brake Transmission Shift Interlock (BTSI) solenoid locks gear selector in Park while ignition is on until brake pedal is depressed. This prevents accidental movement of gear selector from Park while engine is running. BTSI solenoid is located in steering column.