Posting on behalf of a mate.
Currently having supercharger problems. 1st opto was testing bad (would not respond with a ball passed through). Opto has now been replaced, and now the OPTO test page is saying opto 1 'bad' (other two showing 'closed').
Additionally, getting the test report message about switch 81 during test.
Any ideas one where to look next? Wire harnesses for the opto board have been removed and re-connected.
Thanks in advance!