I have what must be one of the few 323ti's in the US -- and amazingly, the car was almost completely unmolested on its way into the country.  But one of the few downsides of this is that I don't have an OBD-II port, so I can't use a readily-available port-scanner.

 

So I've built an interface to the ECUs via the 20-pin connector.  These pages document what I've learned through hours of agonizing research, so the next poor slob who wants to figure this out doesn't have to re-invent the wheel.