BMW 7 Series: System Overview

Input/output Diagram, 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

6. Junction box electronics (JB)
7. Instrument cluster (KOMBI)
8. Multifunction steering wheel
9. Coil-spring assembly
10. Steering wheel heating/steering wheel adjustment buttons
11. 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

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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