Air Distribution Control: Notes

Air distribution on the IHKA E39 is controlled through five stepper motors and a bowden cable. The five stepper motors include:

Fig 1: Air Distribution Control Position

Courtesy of BMW OF NORTH AMERICA, INC.

Of the five stepper motors, the fresh air motor is operated as on the E38 system in a conventional manner. The other four are controlled through the M Bus with a micro processor on each motor.