BMW 3: High-voltage connections
BMW 3 Series G20 (2018-2026) 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:
Standby state
Concept
When standby state is switched on, most functions
can be used while the vehicle is stationary.
Desired settings can be adjusted.
General information
The vehicle is in the standby state after the front
doors are opened from the outside.
Display in the instrument cluster
OFF is displayed in
Intended use
Heed the following when using the vehicle:
Owner's Manual.
Information on the vehicle. Do not remove
stickers.
Technical vehicle data.
The traffic, speed, and safety laws where the
vehicle is driven.
Vehicle documents and statutory documents.
Warranty
Your vehicle is technically configured
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