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

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

Activating instrument cluster lighting
The lighting of the instrument cluster (A1) is switched on automatically when the instrument cluster is activated. The details of the instrument cluster (A1) are only now clearly visible because of the "black-screen technology".
The instrument cluster (A1) is activated when the following events occur:
^ CAN message side lights "ON"
^ Circuit 15R ON
^ Operation of trip odometer reset button (A1s3) or operation of Instrument and controls illumination button, dim (A1s5) or instrument and controls illumination button, bright (A1s4) The driver door is opened/closed
^ Operation of the left multifunction steering wheel button group (S110) or right multifunction steering wheel button group (S111)

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 and controls illumination button, dim (A1s5) or instrument and controls illumination button, bright (A1s4)

Controlling the display lighting
With the CAN message standing lamp "ON" the current position is transmitted by the trip odometer reset button (A1s3) via the CAN interior.
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". As a result the CAN message is now read in by the rain/ light sensor (B38/2) via the Overhead control panel control unit (N70) and the "day"/"night" signal transmitted on CAN B.

Night signal:
The brightness of the instrument cluster (A1) can be regulated via the instrument and controls illumination button, dim (A1s5) or instrument and controls illumination button, bright (A1s4).

Day signal:
The brightness of the instrument cluster (A1) is regulated via the photo transistor. Only one minimum setting is possible via the instrument and controls illumination button, dim (A1s5) or instrument and controls illumination button, bright (A1s4). The display brightness via the rain/light sensor (B38/2) is only dependent on the ambient brightness.
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 and controls illumination button, dim (A1s5) or instrument and controls illumination button, bright (A1s4).