Throttle Switch (M/T)

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 except when throttle is closed or wide open.

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, idle speed control, shift indicator light (if equipped) and EGR vacuum switching valve (if equipped).