Throttle Actuator Control (TAC) System Description: Function

The throttle actuator control (TAC) system delivers improved throttle response and greater reliability and eliminates the need for mechanical cable. The TAC system performs the following functions:

• Accelerator pedal position sensing
• Throttle positioning to meet driver and engine demands
• Throttle position (TP) sensing
• Internal diagnostics
• Cruise control functions
• Throttle control for traction control and stability control systems

The TAC system includes the following components:

• The accelerator pedal position (APP) sensors
• The throttle body assembly
  • TAC module, attached to the throttle body
  • TAC motor, part of TAC module
  • TP sensors, part of TAC module
• The powertrain control module (PCM)