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
SEE MORE:
LTE-Compensator - Information
and User Manual
Your car is equipped with a wireless charging
tray (WCA) to charge your mobile phone and
connect it to the mobile network. To ensure the
best possible connection a signal booster (LTECompensator)
is used in conjunction with the
WCA. The following paragraphs refer to this
booster:
This is a CONSUMER
Charging socket at the vehicle
The charging socket of the G20 PHEV is located on the front left side panel.
The charging socket
cover is locked and unlocked using an electric motor. This electric motor drive
is controlled by the
convenience charging electronics. The charging socket cover can be opened only
in selector lev
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