Benchtest CAN-Devices, how you do it?

[kostelectronics]

Hello Guys

I'm searching for a solution how to test Modules on my bench. And i have an idea, but i need some inputs.
ECU's, ABS, old Radios -->no problem.
I have a good diagnostic-tool and i wire the CAN-Lines from the Unit on my Desk to the Diagnostic-Tool. This way, i can communicate with many ECU's.

But some Dashes need a CAN-Sequence to wake up, some Radios want the CAN-Bus from the car to work (i don't want to remove CANCHECK), some modules uses a low-speed CAN-Bus, etc....

My idea: Is it possible to caputre CAN-Telegrams with a CAN-Analyzer in the car and "play" these Telegrams later on my Desk to wake up the units?
And my big question is: Does the CAN-Gateway in the car convert low-speed CAN into High-Speed-CAN? Because i can't communicate with low-speed CAN devices like Radios, Trailer-Module, etc.. with my diagnostic tool. Anybody have a Solution for this? Does anybody already caputre CAN-Telegrams and maybe have a collection?

BR Matthias from Switzerland