Throttle Position Sensor: Description and Operation

Throttle Sensor:

PURPOSE

To provide the ECM with a voltage signal that corresponds to the opening angle of the throttle.

LOCATION

Mounted to the side of the throttle housing.


OPERATION

The Throttle Position Sensor is a linear potentiometer.
The sensor receives a 5 VDC reference signal from the ECM. At idle, the sensor will output approx. 0.4 VDC to the ECM and upwards of 4.5 VDC at wide open throttle. The ECM uses this voltage signal to calculate throttle opening angle and the speed at which the throttle was opened.