Windshield Wipers, Checking
WARNING: This page is about a different car, the 2010 Volkswagen Passat, 2009 Volkswagen Passat, 2008 Volkswagen Passat, 2007 Volkswagen Passat, and 2006 Volkswagen Passat. However, it is still accessible from the selected car via links, so may be relevant.
Front windshield wiper can be checked via output Diagnostic Test Mode (DTM) of Vehicle Electrical System Control Module -J519-. Refer to VEHICLE ELECTRICAL SYSTEM CONTROL MODULE -J519- OUTPUT DIAGNOSTIC TEST MODE .