Throttle Position Sensor: Description and Operation
PURPOSEThe throttle sensor informs the ECU of throttle angle and speed of application. This information is used to correct for acceleration and provide a reference point for the ECU.
LOCATION
The sensor is mounted to the throttle body on the intake manifold.
OPERATION
Whenever the ignition is ON, the throttle sensor returns a signal to the ECU. The unit functions as a throttle operated potentiometer. The ECU sends a known voltage signal to the unit. Sensor resistance is based on throttle angle. Depending on resistance, an output signal is sent to the ECU.