Throttle Position Sensor: Description and Operation

The Throttle Position (TP) sensor is a rotary potentiometer in which the powertrain control module determines four operating modes from the TP signal.

These are:
^ closed throttle (idle or deceleration).
^ part throttle (Cruise, Moderate Acceleration).
^ Wide Open Throttle (WOT) (maximum acceleration, de-choke on crank and A/C cutout).
^ throttle angle rate.