Central Body Electronics: Notes

The Body Electronic Systems of the E46 M3 are carried over from the E46 Coupe and Sedan models. The Driver Information System and Central Body Electronic System (ZKE V) continue to be used as the primary body electronic systems.

The M3 uses the "K"- Bus as the Primary communication link between body electronic control modules. The "D" - Bus is used as the diagnostic interface from the diagnostic equipment to the instrument cluster. The "CAN" Bus is used as the communication link between all power train systems. Finally, the "M" - Bus is used for IHKA operation of the flap control stepper motors.