The speed indication function is equipped with various types of speedometer depending on the vehicle model.
The instrument cluster receives the position signal tw from the antilock brake system (ABS)/automatic stability control (ASC)/dynamic stability control (DSC) control unit. In this way, the instrument cluster electronics (IKE ) controls the speedometer, total odometer reading and trip odometer reading displays.
The instrument cluster derives the speed from the position signal tw and from the position pulse number (K-number ) stored as coding data in the instrument cluster electronics (IKE ). In addition, the instrument cluster makes available a speed signal (speed-A ) for the connected control units. The speed information is made available in the form of a telegram on the instrument bus (I-bus ) and body bus (K-bus ).