Active Grille Air Shutter - If Equipped

The active grille air shutter is installed behind the radiator grille and attached to the front end carrier. The active grille air shutter incorporates moveable vanes that control the air flow into the top half of the upstream main duct.

The vanes are installed in a housing in two groups of five and operated by an electric motor. The motor is held in a support bracket in the housing. The inboard hinge pin of one of the vanes (the master vane) is engaged in the output shaft of the motor. A lever on the inboard end of each vane is engaged in a motor link. When the motor turns the master vane, the motor link transfers the movement to the levers of the other five vanes, which then turn in unison with the master vane.

The design of the vanes equalizes the wind loading on each side of the hinge pin, which reduces the resistance to turning when the vehicle is traveling at speed. A seal along the top edge of each vane provides sealing between adjacent vanes, and between the two upper vanes and the housing. The vanes can be set to one of 14 positions between fully closed and fully open, and have a range of movement of 80 degrees. During normal operation, for the vanes to move from fully closed to fully open takes approximately 30 seconds. To move the vanes from fully open to fully closed takes approximately 90 seconds.

Operation of the motor is controlled by the Powertrain Control Module (PCM), which communicates with the motor on a Local Interconnect Network (LIN) bus connection. Power for the motor is provided by a power supply from the PCM relay in the Engine Junction Box (EJB).