Idle Speed/Throttle Actuator - Mechanical: Description and Operation

EXTENDED IDLE SWITCH - PCM INPUT
USED ONLY WITH OPTIONAL POLICE PACKAGE WHEN EQUIPPED WITH THIS ENGINE: The extended idle switch is a rocker-type switch mounted to the instrument panel.

The extended idle switch is used to raise the engine idle speed to approximately 1000 rpm by supplying a ground circuit to the Powertrain Control Module (PCM). This idle speed control can only be operated when the shifter is in either the Park or Neutral position.