Shift Interlock System

Shift interlock system prevents shift lever from being moved from Park unless brake pedal is depressed and accelerator pedal is in idle position. Shift lever cannot be moved from Park if brake and accelerator pedal are depressed at the same time. In case of a malfunction, shift lever can be released by placing ignition key in key release slot near shift lever.

Voltage is provided to shift lock solenoid when ignition is in RUN or START position. When brake pedal is depressed, brakelight switch provides voltage to TCM, provided accelerator pedal is in idle position. With accelerator pedal in idle position, a voltage signal is delivered between Throttle Position (TP) sensor and the TCM. The TCM then provides voltage to shift lock circuit in the interlock control unit. When A/T gear position switch is in Park, interlock control unit then operates shift lock solenoid by controlling the ground circuit. When shift lock solenoid is energized, shift lever is released and can be moved.

The A/T gear position switch is located on passenger's side of shift lever. See Figure . Shift lock solenoid is located on driver's side of shift lever. See Figure . Interlock control unit is located behind driver's side of instrument panel and contains an 8-pin electrical connector. See Figure .