Key Interlock Function

When the select lever is at any position other than "P", the solenoid is energized and its pin is held extended. Being caused to stay in its upright position by extension of the pin, the interlock lever interferes with the stopper portion of the rotator which turns together with the ignition key. Thus, the ignition key cannot be rotated to the "LOCK" position.

Fig 1: Identifying Key Interlock Function
Courtesy of SUBARU OF AMERICA, INC.
When the select lever is moved to "P", the inhibitor switch in the select lever assembly operates, de-energizing the solenoid. As the push force of the solenoid pin is removed, the lever spring causes the interlock lever to tilt and become clear of the rotator's stopper. Then the key can be rotated to the "LOCK" position and removed from the ignition switch.

Fig 2: Identifying Retracted & Interlock Deactivated
Courtesy of SUBARU OF AMERICA, INC.