I was experimenting with my ABS module from Passat. I have no response with Elm device. I am uncertain if Elm is capable with KWP2000 on VW. I had no response and decided to put the project on hold. I will need to hook up my Vag KKL to confirm my module is not defective which is common on Passat.
could not get data from his ecu while my mondeo shows things
I have used it on many VW with success. Please enable debug log under preference, connect few times, exit app and send log to Email. Do you have after market radio installed? There might be interference with communication line on terminal 3 on a black connector. Very common problem with VW that have after market radio installed.