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Home >> BMW >> 2003 >> 745Li >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Cluster - Overview - E65 >> Instrument Cluster >> Check Control >> Display Characteristics

Display Characteristics

All messages of the Check Control are triggered by the control units responsible for the monitored function and transferred as data telegrams via the MOST bus or the K-CAN System to the instrument cluster.

From there, they are distributed, depending on requirements to the individual output locations (within the instrument cluster or via MOST to the Control Display).

Each individual CC message is assigned characteristics that control its display features.

At this point a distinction is made between text messages (in addition to an indicator lamp, an accompanying text also appears in the Check Control and possibly also on the Control Display) and non-text notifications (a warning LED or graphic icon lamp lights up).

All the message texts are stored together with the characteristics in a table in the instrument cluster. In the event that a number of messages are output at one time, the message with the highest priority is displayed first. The same applies when different non-text indicators want to light up the same warning lamp.

In addition to the visual display, the Check Control also uses acoustic signals. A gong or double gong are generated by the Audio System Controller (ASK). The gongs have different tones depending on the importance of the associated message. The gong can be generated every time the CC message is re-displayed or only once during the initial appearance of the message

The acoustic signals are output, depending on the reason for the warning, via the front left-hand and/or right-hand vehicle loudspeakers.