Electronic Throttle Actuator: Description and Operation

THROTTLE ACTUATOR CONTROL (TAC) OVERVIEW
The throttle actuator control (TAC) system uses vehicle electronics and components to calculate and control the position of the throttle blade. This eliminates the need for a mechanical cable attachment from the accelerator pedal to the throttle body. This system also performs the cruise control functions as well.
The TAC system components include, but are not limited to, the following:
- The Accelerator Pedal Position (APP) sensors
- The throttle body assembly
- the Engine Control Module (ECM)
The APP sensors and the throttle body assembly provide inputs to the ECM to ensure accurate calculations and control of the TAC system.