Documentation 4 Zones

Which Stepper Motor Is To Be Checked?

Please enter the ID code of the stepper motor to be checked
The order of the list of stepper motors describes the topological order of the stepper motors on the LIN bus. The stepper motors are switched in series on the LIN bus. The first listed stepper motor is the topological first stepper motor viewed from the control module for the climate control. If the LIN bus is interrupted at one position in the wiring harness, the location of the interruption can be detected by finding the topological first stepper motor that is no longer communicating with the control module. All of the topological the following stepper motors would also no longer communicate.

Climate control to the IHKA with FKA (4 zones)







The order of the list of stepper motors describes the stepper motors switched in series on the LIN bus.

Detail view of the area of defrosting, side outlets, stratification







Detail view of the ventilation and footwell areas







Detail view of the rear and footwell area