Controller Area Networks

The CAN-Bus was initially introduced as a network between the ECM (DME) and the Transmission Control Module. Beginning with he 99 model year, CAN was expanded to other modules including the instrument cluster.

Fig 1: Identifying Controller Area Network

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Identifying CAN-Bus E38 750iL (99-01)

Courtesy of BMW OF NORTH AMERICA, INC.