I've seen the link on how to do this posted a few times around this site http://www.ftowa.com/html/workshop/workshopart07.html
Baically just involves grounding one of the pines.
I came across this http://codes.rennacs.com/plugins/Mitsub ... lenger.php
Earlier which indicates that you just put a jumper across pins 1 and 4. This looks a bit simpler than the gounding method.
Does this second method work? Anyone tried it -or would it be for OBD cars only?