Throttle Position Sensor: Description and Operation

PURPOSE

The throttle position sensor detects throttle angle and idle position of the throttle plate.

LOCATION

The sensor is mounted on the throttle body.

CONSTRUCTION

The sensor contains a potentiometer and an idle switch.

OPERATION

Whenever the throttle is opened, a varied resistance signal is reported to the ECU. When the throttle is returned to the idle position, the idle switch portion of the sensor is closed.