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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Electrical machine electronics (EME)
Electrical machine electronics
The function of the Electrical Machine Electronics (EME) is to activate and
regulate the permanently
excited synchronous machine in the high-voltage vehicle electrical system. This
necessitates the
use of a bidirectional DC/AC converter which converts the high-volta
Spoken instructions
Switching on/off
The setting is stored for the driver profile currently
used.
1. Press the button on the
Controller.
2. Move the Controller to the right.
3. "Voice guidance".
Repeat
1. Press the button on the
Controller.
2. Press the Controller.
3. "Repeat voice guidance".
Using the button:
Pr
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