BMW 3 Owners & Service Manuals

BMW 3: Low-voltage Vehicle Electrical System

BMW 3 Series G20 (2018-2025) 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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 Welcome lights

General information Depending on the equipment, the exterior lighting of the vehicle can be set individually. Activating/deactivating Via iDrive: 1. "CAR". 2. "Settings". 3. "Exterior lighting". 4. Select the desired setting: "Welcome and goodbye" When unlocking the vehicle, individual light

 Service information

Electronic emergency gearbox release As with the conventional 8-speed automatic transmission, the GA8P75HZ also has an electrical emergency release option. In conventional vehicles the starter motor rotates for this, and also drives the mechanical transmission oil pump via the torque converter. W

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