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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Frequently Asked Questions
All requirements are met and all required steps
were completed in the specified order. Despite
that, the mobile device does not function as expected.
In this case, the following explanations can help:
Why could the mobile phone not be paired or
connected?
There are too many Bluetooth devices conn
Anticipatory hybrid drive
The anticipatory hybrid drive has been revised and enhanced with the G20 PHEV.
The driver can find
this function under "Anticipatory hybrid drive" in the vehicle literature and
the vehicle's integrated
owner's manual.
Here, with active route guidance by the navigation system the route is ana
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