Active Grille Shutter System: Notes

The active grille shutter system (when equipped) is comprised of the grille shutter assembly and the grille shutter actuator. The active grille shutter system is primarily used to maximize fuel economy by reducing aerodynamic drag on the vehicle. In addition, the system is used to control coolant temperature, HVAC system performance and exhaust emissions depending on the vehicle speed. The system is also used to shorten engine warm-up time, increasing engine efficiency and providing heat to the vehicle occupants in a timely manner.

PCM inputs/outputs used for controlling the active grille shutter system are the:

• Engine Coolant Temperature (ECT) sensor
• Intake Air Temperature (IAT) sensor
• A/C pressure transducer
• Accelerator Pedal Position (APP) sensor
• ABS module, messages sent over the High Speed Controller Area Network (HS-CAN)
• Engine cooling fan motor
• Engine oil temperature