BMW 3 Owners & Service Manuals

BMW 3: 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 charging electronics.

Depending on the installation location, different connectors may be used. They are distinguished by an additional black sliding piece at the connector. The following graphic shows both variants.

Connections
Removing the round high-voltage connector

  1. The round high-voltage connector is connected to the high-voltage connection of the corresponding high-voltage component and locked.
    In the case of connectors with a black sliding piece, the sliding piece must be pushed to the end position in the direction of arrow.
  2. The two locking elements must be pressed together in the direction of arrow. The mechanical lock of the connector at the connection of the high-voltage component is then removed.
  3. While the locking elements are being pushed closed together, the connector must be removed in direction of arrow.

When reconnecting the high-voltage cable the locking elements must not be pushed together.

Instead, it is sufficient to slide the connector onto the high-voltage connection of the component and push the sliding piece towards the high-voltage component if needed. Ensure that the locking elements engage ("clicking" noise). In addition, the engaging of the locking elements should be checked by subsequent pulling on the connector.

Connections
Example of structure of the round high-voltage connector

  1. High-voltage cable
  2. Actuation points on locking elements
  3. Connector housing
  4. Locking element
  5. Connection 1 for bridge in the connector
  6. Connection for shielding
  7. High-voltage connection, pin 2
  8. Mechanical encoding
  9. Connection 2 for bridge in the connector
  10. High-voltage connection, pin 1

In contrast to earlier high-voltage connectors, the connections for the bridge in the high-voltage connector are not evaluated in the G20 PHEV.

    READ NEXT:

     Connection for potential compensation lines

    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

     Tasks

    The Electrical Machine Electronics is made up internally of three subcomponents: Bidirectional DC/AC converter Unidirectional DC/DC converter EME control unit The Electrical Machine Electronics

     DC/DC converter

    The DC/DC converter in the Electrical Machine Electronics of the G20 PHEV is able to adopt the following operating modes: Standby (also in the event of a component fault or short circuit, powe

    SEE MORE:

     High-beam Assistant

    Concept The high-beam Assistant detects other traffic participants early on and automatically switches the high beams on or off depending on the traffic situation. General information The high-beam Assistant ensures that the high beams are switched on, whenever the traffic situation allows. In the l

     Power electronics for activation of the electrical machine

    The power electronics for the activation of the electrical machine are mainly made up of the bidirectional DC/AC converter. It is a pulse converter with a 2-pin DC voltage connection and a 3-phase AC voltage connection. This DC/AC converter can work as an inverter and conduct electrical energy fr

    © 2019-2026 Copyright www.bmw3g20.com