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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Transferring digital keys
The vehicle owner can transfer a digital key for
his/her vehicle to another person with a compatible
smartphone via the BMW Connected app.
When a digital key is transferred, a transaction
number TAN will be generated. Another person
can pair the digital key in the vehicle with this
TAN and the Digi
Safety belt reminder for driver's
seat and front passenger seat
Display in the instrument cluster
The indicator light lights up and
a signal
sounds. Make sure that the safety belts
are positioned correctly. The safety belt
reminder can also be activated if objects are
placed on the front passenger seat.
Safety belt reminder for rear
seats
General information
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