BMW 5 Series Owners & Service Manuals

BMW 5 Series: Gateway

Body Domain Controller (BDC)

Control Units
Body Domain Controller (BDC)

BDC functions

The Body Domain Controller BDC is responsible for the following functions:

  • Gateway
  • Electronic immobilizer
  • Terminal control
  • Central locking system
  • Exterior lights
  • Power windows
  • Horn
  • Interior light
  • Wash/wipe system
  • Vehicle data storage
  • Data transfer for Condition Based Service (CBS)

Fuses in the BDC

The following components are protected by fuses in the BDC:

  • Audio operating facility
  • Operating facility for assist systems
  • Operating unit for light
  • Power windows
  • Heated rear window
  • Trunk function module
  • Integrated automatic heating / air conditioning
  • OBD2 interface
  • Power Control Unit
  • Rain‐light‐solar-condensation sensor
  • Steering column switch cluster
  • Telematic Communication Box
  • Outside door handle electronics
  • Vertical dynamics platform (electronics)
  • Central locking system

Relay in the BDC

The following relays are located in the BDC:

  • Terminal 30F
  • Power window regulators
  • Central locking system
  • Heated rear window
  • Headlight cleaning system

Gateway in the BDC

The central gateway module (ZGM) is integrated in the BDC. It is a control unit within a control unit.

The task of the ZGM is to connect all the data bus systems to each other. By connecting them in this way, it is possible to use information from the individual bus systems on a generalized level. The central gateway module is able to implement different protocols and speeds on other bus systems.

The programming data for the control units is transmitted by Ethernet to the vehicle via the ZGM.

LIN controller in the BDC

The BDC is the gateway for the following components at the local interconnect network bus:

  • Exterior mirror, left and right
  • Switch block, driver's door, front passenger door
  • Steering column switch cluster
  • Light switch
  • Intelligent Safety button
  • Audio operating facility
  • Inside mirror
  • Rain‐light‐solar-condensation sensor
  • Roof function center (interior lighting)
  • Comfort seat, rear passenger compartment, left and right
  • Electrical steering column adjustment
  • Wiper
  • Operating unit, center console
  • Power distribution box, rear

The following control units are connected to the BDC via LIN, but the BDC has only a wake-up function and not a gateway or primary function:

  • Battery charging unit
  • Intelligent battery sensor
  • Electric fan
  • Active air flap control
  • Digital Motor Electronics


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