Vehicle Bus System Interfaces

Vehicle Bus System Interfaces







Steering Column Switch Center (SZL)

The SZL evaluates the signal from the windshield wiper switch and calculates the wiper system function requested by the driver. The bus message is sent out on the byteflight.




NOTE: If communication between the wiper switch and the wiper module is disturbed the fail-safe result is continuous operation of the wipers.


Safety Information Module (SIM)

The SIM receives the driver's command from the SZL and relays it to the Central Gateway Module (ZGM) by byteflight.

Central Gateway Module (ZGM)

As a gateway control unit, the ZGM receives the message from the SIM and relays the message to the Wiper Module via the K-CAN S.

Light Module (LM)

The LM communicates to the wiper module when the parking lights are.This signal is used to enable the SRA (headlight cleaning system) function.

Car Access System (CAS)

Terminal status is received from the CAS via the K-CAN S.

Power Module (PM)

The System voltage is monitored by the Power module and communicated to all control units via the K-CAN P bus.

Instrument Cluster (Kombi)

The instrument cluster provides the following information:

- Ambient temperature (wet-arm heater, defect code memory)
- Time (alternating park positions)
- Washer fluid level

The instrument cluster displays the Check Control messages:"wiper fault" or "refill washer fluid".

Control Display (CD)

Extended Check Control messages are displayed by the Control Display.

Dynamic Stability Control (DSC)

The DSC supplies the road-speed signal for the speed-dependent wiper functions.