Diagnostic Troubleshooting Code with J1939 on XNET

[WyoEng]

I'm looking for examples for monitoring Diagnostic Troubleshooting Code (DTC) via J1939 using XNET, as I'm not really sure about how to get started with DTC.

[Hooovahh]

Never used it but you might want to give this software an evaluation.

https://www.ni.com/en-us/shop/product/automotive-diagnostic-command-set-toolkit.html

Beyond that you can buy one of the ISO CAN documentst that describe how to read DTC.  It usually involves sending a message requesting some data, then you'll get N frames back that you then need to combine and convert into usable information.