Tim.
Few of the devices I worked with or tested have any self tests. In answer to you question, no, not yet. I have however seen self tests from one manufacturer being different on different products, which in my estimation is not keeping with the spirit of (maybe also the requirement*) of the standard.
I would expect self tests to be treated in the same way as manufacturer specific PIDs, being universal across all products.
Hamish.
* I haven't checked before writing this.
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