Electronic Throttle Control

The Throttle Actuator Control (TAC) system is used to improve emissions, fuel economy, and driveability. The TAC system replaces the mechanical link between the accelerator pedal and the throttle valve. The TAC systems also eliminate the Idle Air Controller (IAC) valve, and the cruise control module. These systems are now controlled by the Throttle Actuator Control (TAC) module (integrated into the Engine Control Module (ECM)). The TAC system contains the following components:
^ The Accelerator Pedal Position (APP) sensor
^ The Throttle Position (TP) sensor
^ The throttle body assembly
^ Throttle actuator motor
^ The Engine Control Module