BMW 3: 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
cable with the orange warning color. An overview of the high-voltage cables used
in the G20 PHEV is
provided here.

G20 PHEV, high-voltage components and high-voltage cables
- Electric Motor Electronics (EME)
- High-voltage battery unit
- Convenience charging electronics (KLE)
- Charging socket
- Electrical heating
- Electric A/C compressor (EKK)
- Electric motor

High-voltage cables must not be repaired. In the event of damage, the
high-voltage cable must be fully
replaced!

Bending radius of a high-voltage cable
- High-voltage cable
- Bending radius must be greater than 70 mm

The high-voltage cables must not be excessively bent or kinked The
bending radius must not be less
than 70 mm Excessive kinking/bending of the high-voltage cable may result in
damage to the cable
shielding and thus to an isolation fault in the high-voltage vehicle electrical
system.
Work on live high-voltage components is expressly prohibited. Prior to
every operation which involves
a high-voltage component, it is essential to disconnect the high-voltage system
from the voltage
supply and to secure it against unauthorized return to service.
- Charging plug is not connected to the vehicle.
- Enter the PARK vehicle condition (e.g. by holding down the media
button of the head unit).
- Wait until the vehicle enters "sleep mode" (identifiable by the
fact that the START-STOP button is
not illuminated).
- Open high-voltage safety connector.
- Secure the high-voltage system against restarting at the
high-voltage service disconnect.
- Activate PAD mode (e.g. by operating the START-STOP button three
times within 0.8 s).
- Wait until the Check Control message "High-voltage system
switched-off" is displayed in the
instrument cluster.
- Enter PARK vehicle condition.
READ NEXT:
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
The isolation monitoring determines whether the isolation resistance between
active high-voltage
components (e.g. high-voltage cables) and ground is above or below a required
minimum value. If
the i
SEE MORE:
In order to reduce fuel consumption and CO2 emissions, high-charged engines
are used, the number
of cylinders is reduced and the drivable speeds are lowered.
However, with these measures the torsional vibrations of the crankshaft are
increased as a result of
the acceleration during the work cycle
Concept
The function displays the service requirements
and the corresponding maintenance scopes.
General information
After switching on drive-ready state, the instrument
cluster briefly displays available driving distance
or time to the next scheduled maintenance.
A service advisor can read out the