Throttle Position Switch: Description and Operation

Throttle Switch:

The throttle switch consisting of 2-contact points (idle switch and wide open switch) is connected to the throttle valve shaft on the throttle body, and detects the throttle valve opening. The throttle opening in the idle state is detected by means of the idle switch, and the wide open state is detected by the wide open switch. By monitoring their "ON/OFF" signals, the ECM detects the throttle valve opening. The ECM uses the "ON/OFF" signals from throttle switch as one of the signals to control fuel injector, ISC solenoid valve, shift up indicator light and EGR VSV (if equipped).