STEPPER MOTOR M-BUS CONTROL
The E46 uses the M-Bus for stepper motor control. All five stepper motors of the IHKA
are bus controlled including:
• Two fresh air/recirc-air flap motors
• Face vent flap motor
• Footwell flap motor
• Defrost flap motor
Due to the requirement for a fast acting motor for the fresh/recirc flaps, two different step-
per motors (slow/fast) are used in the system.
9
E46 Climate Control
To Next Page
Loading...
