Throttle Full Close Switch: Description and Operation

Idle Switch:

The Idle Position Switch, is a contact switch that senses accelerator operation. The switch is installed on the throttle body housing at the throttle shaft. When the throttle valve is in the idle position, the ISC lever pushes the switch on.

Idle Switch Circuit:

The Idle Position Switch position indicates whether the accelerator is either depressed or released and is monitored by the ECU, enabling it to control the idle speed control servo.