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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 High beams, headlight flasher, turn signal

High beams, headlight flasher Push the lever forward or pull it backward. High beams on, arrow 1. The high beams light up when the low beams are switched on. High beams off/headlight flasher, arrow 2. Turn signal On: press the lever past the resistance point. Off: press the lever past the

 Warning function

If you leave the lane If you leave the lane and if a lane marking has been detected, the steering wheel vibrates in accordance with the steering wheel vibration setting. If the turn signal is switched on before a lane change, a warning is not issued. Steering intervention Depending on the equipment

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