Throttle Actuator Control (TAC) System Description: Notes

Fig 1: View Of Throttle Actuator Control (TAC) System

Courtesy of GENERAL MOTORS CORP.

The throttle actuator control (TAC) system uses the vehicle electronics and components in order to calculate and control the position of the throttle blade. This system eliminates the need for a mechanical cable attachment from the accelerator pedal to the throttle body. This system also performs the cruise control functions.

The TAC system components include but is not limited to the following:

• The accelerator pedal position (APP) sensor
• The throttle body
• The throttle actuator control (TAC) module
• The powertrain control module (PCM)

Each of these components interface together in order to ensure accurate calculations, and in order to control the throttle position.