Display lighting: Notes
The SID unit calculates a suitable value for the odometer display lighting based on the rheostat value and the value of the light intensity in the cabin, which is obtained from the light sensor.
When it is dark, the lighting is controlled by the rheostat value and when the light in the cabin increases it is controlled by the value of the light intensity in the cabin. This ensures that the odometer display will be easy to read in all lighting conditions.
SID sends the calculated value to the bus as a Display lighting value, unit %.
The main instrument unit control module uses the value to control the odometer display lighting.