BMW 3: Low-voltage Vehicle Electrical System
BMW 3 Series G20 (2018-2023) 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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Engine compartment
Overview
Jump-starting, positive battery terminal
Oil filler neck
Coolant reservoir, auxiliary cooling
Coolant reservoir, engine
Jump-starting, negative battery terminal
Vehicle identification number
Filler neck for washer fluid
Hood
Safety information
Warning
Improperly executed work in
Standard charging cable
The standard charging cable is designed for mobile use. All protection and
communication devices
of the standard charging cable are integrated in the so-called "in-cable control
box". The volume and
weight of this solution is low and the charging cable can be easily transported
in the vehicle.
I
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