Throttle Sensor System

A throttle position sensor is provided with a potentiometer. Idle switch interlocked with throttle valve shaft is utilized. This throttle position sensor sends SPFI control unit a potentiometer output signal corresponding to opening of throttle valve and an idle switch signal that turns on only when throttle is opened nearly to idle position. Using these signals, SPFI control unit precisely controls air-fuel ratio during acceleration and deceleration as well as idling.