Fresh/Re-Circulation Air

The re-circulation switch on the control panel signals to the Body Control Module (BC1), which in turn controls the fresh/re-circulation flap via a DC servomotor. The servomotor consists of a unidirectional electric motor with a integrated flap lever mechanism and is driven end-to-end, and then switched off on a timer (maximum run time = 10 seconds).

The servomotor also has internal limit switches to disconnect power. There is no feedback to the BC1 or IHKS concerning flap position.