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
SEE MORE:
Adjusting
Brightness
1. "CAR".
2. "Settings".
3. "Displays".
4. "Control display".
5. Adjust the brightness of the screen.
Headphones
Connect cordless headphones.
Tone
If the vehicle loudspeakers are selected for
sound output, the settings are adjusted as in the
front.
If headphones are selected for soun
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 provides an overview of the previous and the current
representation and
designation:
Bus overview
G2
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