System Functions: Notes

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

The control unit of the instrument cluster incorporates certain functions over and above the display and indication functions, namely:

Lighting Of The Instrument Cluster
Dimming Of The Instrument Cluster
High And Low-Voltage Detection For The Instrument Cluster
Heating And Contrast For The LCD Display
On-Board Computer Functions
Check-Control Messages
Pre-Drive Check
Condition Based Service (CBS)
Vehicle Identification Check