Sunlight Photo Sensor
WARNING: This page is about a different car, the 2003 Volkswagen EuroVan and 2002 Volkswagen EuroVan. However, it is still accessible from the selected car via links, so may be relevant.
Information provided by sunlight photo sensor is used to control temperature flap and fresh air blower speed, depending on light intensity. In event of sunlight photo sensor failure, CCM uses a preprogrammed fixed value instead.