Many thanks for this. I had exactly the same problem on my Skoda Octavia Elegance 2011 recently - all the electrics suddenly stopped working in the two passenger side doors. It was intermittent for a while and unfortunately I left it until it went with the doors locked.
I checked the driver's side loom wires for continuity and they were all fine. I'd had a quick look at the passenger side loom wires when the issue was intermittent and they looked fine although I didn't check them.
I managed to get the passenger front door card off without damaging it and with the door locked - it wasn't that hard to do. I then thought it was worth a shot buying a new control unit which had the numbers: "1T0959702S" on the motor and "5ko 959 792 a" on the module bit itself. This was easy to replace and I'm very happy to say immediately fixed the issue. I got the part from here btw: Volkswagen Touran 1T Window Regulator Motor Front Passenger Side 1T0959702S
If anyone has the same issue and needs any help, give me a shout.