VCDS cannot access RNS-510 controller

[Tom Watson]

Greetings,

As the title says, for some reason, VCDS cannot access the controller 56 (in an Octavia) for my RNS510. I can access 37 (navigation) and 77 (telephone) without any problems. The GPS , MDI, and bluetooth all work as advertised, including display on the MFD.

Went on holidays, car battery went dead flat, causing a bit of grief. Eventually started the car after charging the battery, but had a heap of faults and warning lights due to an undervoltage error. I cleared all these and they have not returned. Controller 56 still wouldn't connect. It says diagnostics connected, then bounces back to the radio. It tries this 3 times then says there is an error. I have done full resets, including unplugging everything and removing the unit, but no change.

My questions are; is the controller external to the radio and any thoughts on if / how I can get it working again?

Thanks

Tom

[Ryan_R]

In my Golf 37-Nav and 56-Radio are exactly the same (I only ever use 37 though). If 37 works and the RNS510 works ok I wouldn't be super concerned about it tbh.

[Transporter]

Check in 19 CAN gateway installation, that 56 Radio is ticked. If not tick it and save. Anyway as Ryan R says, if everything works with 37 only, it should be OK.

also delete the fault codes at individual controllers mainly at 19 CAN gateway, rather than chust Erase All DTC.

[Tom Watson]

Thanks for the replies. I will have a look at the settings in the CAN controller. I hear what you are saying about everything working so not to worry.

Tom