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. In case of a malfunction, shift lever can be released by placing ignition key in key release slot near shift lever and pushing down. Voltage is provided to shift lock solenoid when ignition is on.

When brake pedal is depressed, battery voltage is applied to the PCM/TCM from brakelight switch. With accelerator pedal in idle position, voltage is applied to the PCM/TCM from the throttle position sensor. The PCM/TCM then supplies voltage to shift lock circuit in the interlock control unit. When A/T gear position switch is in "P" position, interlock control unit operates shift lock solenoid by controlling the ground circuit. When shift lock solenoid is energized, shift lever is released and can be moved.