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.