BMW 3 Owners & Service Manuals

BMW 3: Low-voltage Vehicle Electrical System

BMW 3 Series G20 (2018-2026) Training manual / Low-voltage Vehicle Electrical System

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 Voltage supply

The 12 V vehicle electrical system of the G20 PHEV is essentially the same as the electrical system of the G20. The main difference lies in the fact that the power supply is no longer by the al

 Start-up system

Starter motor The combustion engine B46 can be started via the conventional starter motor and the electrical machine. The following table shows when and under which conditions the respective start

 Terminal control for driving readiness

Terminal control from driver's view Vehicle condition - DRIVING Vehicle condition - RESIDING Vehicle condition - PARKING Transitional condition for establishing driving readiness, ending driv

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 Shift point indicator

Concept The shift lights indicate the upshift point at which the best possible acceleration can be achieved. Functional requirement Shift lights are shown when the SPORT or SPORT PLUS driving program is activated. Switching on/off Steptronic Sport transmission: 1. Select SPORT or SPORT PLUS driving

 Check Control

Concept The Check Control system monitors functions in the vehicle and notifies you of malfunctions in the monitored systems. General information A Check Control message is displayed as a combination of indicator or warning lights and text messages in the instrument cluster and, if applicable, in th

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