Principle of Operation: Notes

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