Hello, I have this problem that we see in the video only the video is a a3 audi and mine audi a6 c5 2000, when you give the contact or turn on the car needles rise, but after a few seconds return to zero the fis or small screens of the km and the time and all the time just is not on. Red dashboard lights do not work, you have some idea that it is all OK, and Back OK connectors, fuses revised 20 times, any idea
https://www.youtube.com/watch?v=3Iom...k#action=share

After connecting to VAGCOM get this:
01177 - Engine Control Unit
49-00 - No Communications
00668 - Terminal 30 Supply Voltage
53-00 - Supply Voltage Too Low
What you think, it could be?