GF54.30-P-2007T Instrument Cluster Illumination, Function

GF54.30-P-2007T Instrument Cluster Illumination, Function

Activating instrument cluster lighting
The illumination of the instrument cluster (A1) switches on automatically when activated. The details of the instrument cluster (A1) are only now clearly visible due to the Black-Screen technology. The instrument cluster (A1) is activated when the following events occur:
^ Controller Area Network (data bus/CAN bus) (CAN) message "standing lamps ON"
^ Circuit 15R ON
^ user input at the trip odometer reset button (A1s3)
^ Driver door is opened
^ Driver door is closed

The intensity of the lighting is dependent on:
^ The CAN message from the rain/light sensor (B38/2)
^ the status of "circuit 58d" (standing lamp information)
^ The position of the instrument illumination brightness control and reset button (A1r1)

Controlling the display lighting
With the CAN message "standing lamp ON" the current position of the instrument illumination brightness control and reset button (A1r1) is transmitted via the Controller Area network bus Class B (interior) (CAN B). In this state, the signal from the rain/light sensor (B38/2) via the overhead control panel control unit (N70) is disregarded.

Controlling display lighting by means of sensor
"Circuit 58d" is set to 0 % by the CAN message "Standing lamp OFF". Because of this, the CAN message from the rain/light sensor (B38/2) via the overhead control panel control unit (N70) is processed as a control variable and converted.

The intensity of the display is dependent only on the ambient brightness detected by the rain/light sensor (B38/2). In the event of a defect in the rain/light sensor (B38/2) "Circuit 58d" is set to 100 % by the overhead control panel control unit (N70) The display brightness is now adjustable via the instrument illumination brightness control and reset button (A1r1).