Ignition Key In Signal: Description and Operation

IGNITION SWITCH - ON POSITION OR ACC POSITION
This switch sends a HIGH signal to the ECU when the-ignition key is at the ON or ACC position. (This is a condition when arming or disarming the system.)

KEY-REMINDER SWITCH (FOR LIGHTING MONITOR)
When the system is activated, the starter circuit is inhibited. By inserting the key in the ignition switch, the power to the starter inhibitor relay is cut, and the engine can be started.