HU-B: HU-B

The headunit basic version (HU-B) has 8 freely programmable favorite buttons.

Fig 1: Headunit

Courtesy of BMW OF NORTH AMERICA, INC.

The audio operating facility and climate operating facility are connected electrically to the integral automatic climate control (IHKA). A local interconnect network bus is used here. The operating facilities take their power supply and ground connection from the IHKA with terminal 30F.

In principle, the structure of the HU-B corresponds to that of a PC (personal computer). Similar to a PC the headunit basic version includes:

• Processor
• Working memory
• Other periphery such as a DVD drive
  Fig 2: Headunit And DVD Drive

  Courtesy of BMW OF NORTH AMERICA, INC.

The headunit basic version (HU-B) is connected to the diagnosis socket via Ethernet. The software can thus be reprogrammed during service operation.

Because of the extended functionality, the connections on the rear of the headunit basic version have changed.

The headunit basic is available in different versions (depending on vehicle equipment, national-market version, for example).

The following graphic shows for example possible connections on the rear side of the headunit basic.

Fig 3: Headunit Connections

Courtesy of BMW OF NORTH AMERICA, INC.