[klez]

Of all the car I worked on (mostly Mitsubishi and Ssangyong) very few of them had non-standard procedures for erasing DTCs.

I don't know what you mean by 'erasing the emission monitor', unless you mean the freeze frame, which usually gets erased when you erase DTCs with the standard 0x14 request.

Anyway I work exactly as you do, by reverse-engineering official tools.

And I'm not very knowledgeable about cars anyway :)