2003 Saturn L300 V6-3.0L VIN R P2119-Throttle Closed Position Performance

The throttle actuator control (TAC) module contains a direct current actuator motor
controlled by the ECM used to move the throttle plate (in either direction) and two throttle
position sensors to determine throttle plate position. The throttle plate is held at a 7% rest
position to a mechanical stop by a constant force return spring. This spring will hold the
throttle plate to the stop when there is no current flowing to the actuator motor. There is
another return spring, which creates constant force on the throttle plate only when the
throttle plate is moved towards the full closed position. The ECM will monitor both the
actuator motor and TP sensors for circuit faults, as well as check to make sure both
springs can return the throttle to the 7% position no matter where the throttle plate
remains.