When you say your BDC doesn't support K-CAN3, do you mean it's not there, or it wasn't there but you've retrofitted it, but it's still not working?@sb2002 did your car already have a KCAN3 bus for, say LED headlights?
I still have had no joy getting my reversing camera to work and I am now fairly certain that it's because my BDC doesn't support KCAN3.
The camera does work on KCAN2, however is invisible to E-Sys and therefore cannot be coded - which is required. So equally if anyone knows how to code an ECU directly or on another bus, please do let me know.