Throttle Switch (Metro M/T & Prizm)

Signals ECM of closed throttle condition. The idle switch and Wide Open Throttle (WOT) switch are a part of the throttle switch. Switch is open at any position except closed throttle and WOT. At closed throttle, idle switch closes. At wide open throttle, WOT switch closes. These on/off signals are monitored by ECM and used to control fuel injection, ISC solenoid, shift-up indicator light and EGR solenoid (if equipped).