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-voltage cables
The high-voltage cables connect the high-voltage components and are
identified by orange cable
sleeves. The manufacturers of hybrid cars have agreed on a uniform
identification of the high-voltage
cable with the orange warning color. An overview of the high-voltage cables used
in the G20 PHE
Evasion assistance
Concept
The system supports the driver in making evasive
maneuvers in certain situations, such as
when obstacles or persons suddenly appear.
General information
The system issues a warning and intervenes to
support the driver if a lateral evasive maneuver is
possible. Sensors monitor and detect the
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