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
SEE MORE:
System overview
System overview of hybrid brake system
Hydraulic braking
Signal path
Regenerative braking
High-voltage battery unit
Electric Motor Electronics (EME)
Electric motor
Drive train
Digital Motor Electronics (DME)
Wheel brakes
Dynamic Stability Control (DSC)
Brake pedal with brake pedal ang
Sockets
General information
The total load of all sockets must not exceed
140 watts at 12 volts.
Do not damage the socket by using non-compatible
connectors.
Safety information
Warning
Devices and cables in the unfolding area of the
airbags, such as portable navigation devices,
can hinder the unfolding of
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