BMW 3: 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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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
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
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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For some functions, popup windows are displayed
automatically on the Control Display.
Some of these popup windows can be activated
or deactivated.
Via iDrive:
1. "CAR".
2. "Settings".
3. "General settings".
4. "Pop-ups".
5. Select the desired setting.
The setting is stored for the driver prof
Concept
BMW Digital Key allows the vehicle to be unlocked
and locked, as well as started, with a
compatible smartphone.
General information
BMW Digital Key varies by country and may be
unavailable.
To unlock and start a vehicle with a compatible
smartphone, a digital key must be installed on
this s