Air Distribution

IHKA E31 AIR DISTRIBUTION







The E31 air distribution outlet locations are shown above.
As on the E32, the E31 IHKA control module operates left and right face vent and footwell flaps separately, while left and right defroster flaps are operated as a pair.
Face vent flap and footwell flap operation on E31 Systems is the same as on the E32.
Defroster flap operation, initially the same as on E32 vehicles, changed slightly effective 4/91 with the release of software version "05":
- whenever "up/down" mode is selected, the defroster flaps open fully, regardless of Y-factor, to reduce the likelihood of window fogging.