The Electronic
Throttle Control (ETC) System consists of a throttle body with an
integrated control motor and throttle position sensor (TPS). Instead of
the traditional throttle cable, an Accelerator Position Sensor (APS) is
used to receive driver input. The ECM uses the APS signal to calculate the
target throttle angle; the position of the throttle is then adjusted via
ECM control of the ETC motor. The TPS signal is used to provide feedback
regarding throttle positon to the ECM. Using ETC, precise control over
throttle position is possible; the need for external cruise control
modules/cables is eliminated.

