Gateway Error - U011400

[nikkosepulveda]

I have a 2015 A3 and I recently got an error on 19 Gateway: Lost Communication with Four-Wheel Drive Clutch Control Module U011400 and now I can't access 22 All Wheel Drive. I've looked around but haven't found anything that has worked for me. I followed the instructions from this post forum.obdeleven.com/thread/11422/all-wheel-control-removed-connected but it did nothing to bring back 22 All Wheel Drive. Does anyone know a fix for this? What information should I provide that would be helpful? Thank you!

[nikkosepulveda]

Here is some more information about what happened. I did an haldex fluid change and when the car was on jack stands I put it in gear to see if the haldex was engaging. My rear tires did not spin and my haldex was not engaging. I found some forums online with a few steps to take that had worked for some people. 

Engine on:
1. (22) AWD -> Basic Settings -> Pump Prime for 30 seconds
2. (22) AWD -> Output Tests -> Clutch Engaged/Disengaged 2 time for 30 seconds each
Ignition on, Engine off:
3. (22) AWD -> Clear codes (even if none are present)
4. (22) AWD -> Basic Settings -> Clear all adaptation values
5. Drive off, no launches for a few miles or so

When I tried to do these I got error codes and it couldn't be completed. After that the next time I opened up ODBeleven my car could no longer communicate with (22) All Wheel Drive.

Hope that helps. Happy to add anything else that might be needed or helpful.

Thanks!

[nikkosepulveda]

chrispat19893 helped me a ton and gave me a bunch of trouble shooting steps. What ended up being my problem was a blown fuse in spot 44. I replaced the fuse and the module showed up again in OBDeleven. I tried to prime my haldex pump again and it blew the fuse again. As I figure out more and why it blows my fuse I will post updates here.

[nikkosepulveda]

I learned my controller was bad. I sent my controller to www.haldexrepairs.co.uk and they got it repaired within a few days. I installed the fixed controller and a new pump and everything has been great since then.