Door Control - Automatic System

Door Control - Automatic System

The position of the ram air doors is automatically controlled by the ATC (automatic temperature control) module. The positions of the recirculation doors and the distribution doors are either automatically controlled by the ATC (automatic temperature control) module or manually controlled by the related switches.

Ram Air Doors
The ATC (automatic temperature control) module progressively closes the ram air doors, in four steps, as vehicle speed increases, and opens them again as vehicle speed decreases. At the maximum closed position, 90% of the fresh air inlet area is closed off. A hysteresis of 15 km/h (9 mph) prevents the ram air doors from hunting at a constant vehicle speed.