Circuit Operation

When the ignition switch is in the ON position or when Retained Accessory Power (RAP) is active, the shift interlock system prevents the driver from shifting the vehicle from park unless the brake pedal is depressed. Pressing the brake pedal de-energizes the solenoid. The restrictor arm moves clear of the shift lever arm, allowing the gear selector to operate normally.

To override the shift interlock system and shift the vehicle, turn the ignition switch to OFF. This removes battery voltage at the solenoid, leaving the solenoid de-energized.

IMPORTANT: On vehicles equipped with Retained Accessory Power open any door to remove battery voltage at the solenoid. Refer to Accessories and Optional Power Testing and Inspection