BMW 3: High-voltage connections
BMW 3 Series G20 (2018-2025) Training manual / Electrical Machine Electronics / Connections / High-voltage connections
At the Electrical Machine Electronics, there is a total of three high-voltage connections to connect the lines for other high-voltage components. The connections for the electric A/C compressor and the electrical heating are on the convenience charging electronics.
The following simplified wiring diagram shows the high-voltage connections between the Electrical Machine Electronics and the other high-voltage components.
High-voltage connections of the Electrical Machine Electronics
- Electrical heating
- Electric motor
- High-voltage battery unit
- 12 V battery
- Charging socket
- Electric A/C compressor
- Unidirectional AC/DC converter
- Convenience charging electronics
- Electrical Machine Electronics
- Bidirectional DC/AC converter
- Unidirectional DC/DC converter
- Anti-overload current guard (90 A)
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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
c
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
Removing the round high-voltage connector
The following figures show the approach for releasing the round high-voltage
connector, as used
for example on the high-voltage cable from the Electrical Machine Electronics to
the convenience
charg
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Driving style analysis
Concept
The function helps develop an especially efficient
driving style and to conserve fuel.
For this purpose, the driving style is analyzed.
The assessment is done in various categories
and is displayed on the Control Display.
This display will help you adjust your driving style
and save some
Parking lights, low beams
and roadside parking lights
General information
If the driver's door is opened when the drive-ready
state is switched off, the exterior lighting is
automatically switched off.
Parking lights
General information
The parking lights can only be switched on in the
low speed range.
Switching on
Press the button on the light
switch
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