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 (APP) sensing
•  Throttle positioning to meet driver and engine demands
•  Throttle position (TP) sensing
•  Internal diagnostics
•  Cruise control functions
•  Manage TAC electrical power consumption

The TAC system includes the following components:
•  The APP sensors
•  The throttle body assembly
•  The powertrain control module (PCM)
Electronic Throttle Actuator Control system  ( TAC )
Warning Lights