BMW 3: Low-voltage Vehicle Electrical System
BMW 3 Series G20 (2018-2024) 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:
BMW Touch Command
General information
As an alternative to the touch screen, rear entertainment
can also be operated with BMW Touch
Command.
For further information, see BMW Touch Command
in the Owner's Manual for the vehicle.
Operation via BMW Touch
Command
BMW Touch Command can be connected to the
left or right sc
Removing the flat high-voltage connector
Bridge for high-voltage interlock loop
Before the high-voltage connector can be
disconnected, the bridge for the high-voltage
interlock loop must first be removed. The bridge
closes the circuit of the high-voltage interlock
loop in a connected state. The SME and EME
control units continuous
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