BMW 5 Series Owners & Service Manuals

BMW 5 Series: Control units on the K-CAN2

Roof function center (FZD)

Control Units
Roof function center (FZD)

Depending on the vehicle equipment the roof function center FZD includes the corresponding components for:

  • Alarm system
  • Control, slide/tilt sunroof
  • Gesture recognition camera
  • Emergency call button

On vehicles with gesture control, the gesture recognition camera is installed in the FZD. The gesture recognition camera is not shown as a control unit by the BMW diagnosis system. Diagnosis takes place via the FZD. The gesture recognition camera is connected to the PT-CAN4. As a result, the bus signals do not have to be forwarded to another CAN bus by the Body Domain Controller.

The FZD is not responsible for the control of the interior light. The interior light unit and the FZD electronics are located in the same housing.

Trunk function module (HKFM)

Control Units
Trunk function module (HKFM)

The control unit for the power trunk function module (HKFM) is responsible for control of the lift.

Seat modules

Control Units
Seat module

The following seat modules are present corresponding to the vehicle equipment:

  • Driver's seat module (SMFA)
  • Front passenger seat module (SMBF)

The seat modules are responsible for actuation of the servomotors in the corresponding seat.

Depending on the equipment, there may be 2 identical seat modules installed in the vehicle. Encoding of the control units takes place by connection to the wiring harness. The control unit is assigned correspondingly in the vehicle depending on the additional ground encoding.

Seat pneumatics modules

Control Units
Seat pneumatics module back right SPNMHR

The following seat pneumatics modules are present corresponding to the vehicle equipment:

  • Seat pneumatics module front left (SPNMVL)
  • Seat pneumatics module front right (SPNMVR)

The seat pneumatics modules are responsible for the massage function in the corresponding front seat. Depending on the equipment, there may be 2 identical seat pneumatics modules installed in the vehicle. Encoding of the control units takes place by connection to the wiring harness. The control unit is assigned correspondingly in the vehicle depending on the additional ground encoding.

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