Detection of the sunlight intensity
WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
The solar sensors measure the intensity of the sunlight separately for the driver's and front passenger side. The sensor data is processed in the evaluation electronics and transmitted via the bus to the IHKA control unit. The IHKA control unit evaluates these sensor signals.