BMW 3 Owners & Service Manuals

BMW 3: Bus Systems

The bus systems of the G20 PHEV are based on the bus systems of the G20. All the main and sub-bus systems of the G20 are also used in the G20 PHEV. Compared to the bus systems of the G20, some control units have been added, adapted or not installed. The resulting bus overview of the G20 PHEV is as follows:


 New schematic diagram

The representation of the individual bus systems and their designations have been adapted to the representation and the designation of the ISTA workshop information system. The following table provi

 New control units

Compared with the G20, a number of new control units have been installed in the G20 PHEV.

 Electrical machine electronics (EME)

Electrical machine electronics The function of the Electrical Machine Electronics (EME) is to activate and regulate the permanently excited synchronous machine in the high-voltage vehicle electrical


 General information

When the vehicle is locked, the vehicle alarm system reacts to the following changes: Opening a door, the hood or the trunk lid. Movements in the car's interior. Changes in the vehicle tilt, for instance, during attempts at stealing a wheel or when towing the vehicle. Disconnected battery vol

 Cruise control

Concept Using this system, a desired speed can be adjusted using the buttons on the steering wheel. The system maintains the desired speed. The system accelerates and brakes automatically as needed. General information Depending on the vehicle setting, the cruise control settings may change under c

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