Strange RNS510 / CAN BUS issue

[VW Central]

Just dropped the car off. Hopefully I will have an answer tomorrow

[JanBulane]

Hi. Needless to say i have the exact same problem and the "engineers" from VW had no clue, so they said i should get a new unit. That's hardly an answer, given also my previous experience with these guys. Last time i had a tire problem (noise) and they made me replace the bearings (!). Obviously i found out the real problem later and had to swap everything back.

So, back to the RNS 510 - i do have an A unit, all the symptoms match, tried a firmware upgrade (worked) but still it won't communicate properly with the car. Hope that you found out the issue. Motherboard perhaps?

Thank you.

[FJ Steve]

what components do you have added to the RNS?
Bluetooth?
RVC/Park Assist?
*** VIM cable ***(Kufatec)

The Kufatec cable is likely to be the culprit, and if you don't have that, but have other items added, I'd suggest disconnecting them and put the RNS back to a 'bare-bones" unit and see if it works. If it does...then add each component until you find the one that trips it up.

Dean found that the Kufatec VIM cable was the culprit...and we believe that a similar situation has occurred to a unit here in Perth (that has a Kufatec cable)

Hi. Needless to say i have the exact same problem and the "engineers" from VW had no clue, so they said i should get a new unit. That's hardly an answer, given also my previous experience with these guys. Last time i had a tire problem (noise) and they made me replace the bearings (!). Obviously i found out the real problem later and had to swap everything back.

So, back to the RNS 510 - i do have an A unit, all the symptoms match, tried a firmware upgrade (worked) but still it won't communicate properly with the car. Hope that you found out the issue. Motherboard perhaps?

Thank you.