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Structure and inner electrical connection

The starter motor generator has a separate terminal for the positive battery cable. The transfer of the control variables (such as nominal voltage for alternator for example) takes place via the local interconnect network bus.

An electronics module assumes the functions of the controller, as well as the activation of the power electronics.

The starter motor generator is connected to the vehicle electrical system by means of a 6-pin plug connection.

Fig 1: Starter Motor Generator Electronics Module - Circuit Diagram
G09910231Courtesy of BMW OF NORTH AMERICA, INC.
Index Explanation
1 Starter motor generator electronics module
PIN REFERENCE

Pin Explanation
B+ Positive battery cable
Terminal 30B Terminal 30B (basic operation)
Terminal 30B Terminal 30B (basic operation)
Kl. 31 GND
LIN LIN bus
1 pin not used.