Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Throttle Actuator Control (TAC) System Description: Notes
| Callout | Component Name |
|---|---|
| 1 | Throttle Actuator Control (TAC) Module |
| 2 | Throttle Body Assembly |
| 3 | Accelerator Pedal Position (APP) Sensor |
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 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 to ensure accurate calculations and control of the throttle position.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.