BMW 7 Owners & Service Manuals

BMW 7 Series: System Overview

Input/output Diagram, Steering Column Switch Cluster

Steering Column Switch Cluster
Fig. 125: Steering Column Switch Cluster Input/Output Diagram

COMPONENTS DESCRIPTION CHART

  1. Steering column stalk for turn-indicator/high-beam switch
  2. Steering column switch cluster (SZL)
  3. Steering column stalk wiper switch
  4. Footwell module (FRM) 12 Control unit (KAFAS)
  5. Central gateway module (ZGM)

FlexRay - FlexRay

  1. Junction box electronics (JB)
  2. Instrument cluster (KOMBI)
  3. Multifunction steering wheel
  4. Coil-spring assembly
  5. Steering wheel heating/steering wheel adjustment buttons
  6. Crash Safety Module (ACSM)

LIN-Bus - Local Interconnect Network bus
LWS - Steering-angle sensor

The signals which are triggered by the turn-indicator/high-beam switch steering column stalk (1) or wiper switch (3) are made available to the footwell module (4) or the junction box electronics (6).

The button signals at the multifunction steering wheel (8) are directed through the coil-spring assembly (9) to the steering column switch cluster (2), where they are evaluated and then transmitted across the FlexRay.

System Circuit Diagram, Steering Column Switch Cluster

Steering Column Switch Cluster
Fig. 126: Steering Column Switch Cluster System Circuit Diagram

COMPONENTS DESCRIPTION CHART

  1. Central gateway module (ZGM)
  2. Footwell module (FRM)
  3. Dynamic Stability Control (DSC)
  4. Car Access System (CAS)
  5. Instrument cluster (KOMBI)
  6. Crash Safety Module (ACSM)
  7. Junction box electronics (JB)
  8. Front distribution box
  9. Fanfare-horn button
  10. Steering column stalk wiper switch
  11. Automatic wiping LED
  12. Wiper switch
  13. Knurled wheel for intensity of the rain-light-solar-condensation sensor
  14. Automatic wiping button
  15. Steering column switch cluster coil spring
  16. Steering column switch cluster (SZL)
  17. Button combination steering wheel heating/electrical steering column adjustment
  18. Electrical steering column adjustment button
  19. Steering wheel heating button
  20. Steering wheel heating button LED
  21. High-beam assistant button
  22. On-board computer button
  23. Turn-indicator/high-beam switch
  24. Steering column stalk for turn-indicator/high-beam switch
  25. Driver's airbag priming caps
  26. Steering wheel electronics
  27. Vibration actuator
  28. Steering wheel heating
  29. Button block for cruise control system in the multifunction steering wheel
  30. Button block for radio/telephone etc. in the multifunction steering wheel

FlexRay - FlexRay
KI. 30 - Terminal 30
KI. 30B - Terminal 30 base operation
LIN-Bus - Local Interconnect Network bus
LWS - Steering-angle sensor

NOTE: A three-stage driver's airbag is installed in the US version.

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    Signal Detection The functions of the steering column switch cluster are: Detecting the switching signals of the steering-column switches Detecting the controls in the multifunction steering wheel

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     System Components

    The Steering Column Switch Cluster as Standard Equipment The steering column switch cluster (SZL) consists of, among other things, the following components: Electronic steering column switch cluste

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