Function, Checking
WARNING: This page is about a different car, the 2017 Volkswagen GTI, 2016 Volkswagen GTI, 2015 Volkswagen Golf, and 2015 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.
-- After installing the All Wheel Drive Clutch Pump -V181- and the Differential Locks Control Module -J647-, run the Basic setting using Guided Functions . Refer to Vehicle Diagnostic Tester.