Good evening John, since my current Morgan only "speaks electronic" to me, I bought a translator on-line (almost FOC nowadays). It helps me, 1. to understand what's wrong and if it's a crucial part and 2. I can do a reset myself if necessary, when the engine management light lights up.
as an example: http://cgi.ebay.co.uk/Universal-Diagnost...=item439ed31cfc