i have read about Pc- Subby ecu interface:
It is simple K-line adaptor for ISO 9141-1 protocol.
It is of max232 and mc33199 and a couple of capasitors.
Nothing more.
so in subyecu.html i have read:
The subaru select monitor protocol uses an ISO9141 interface and uses UART settings: 4800 bps n, 8, 1 all data is sent and recieved using small packets that all share a common header.
now i think that a simple k-line interface will work
i will do this http://www.planetfall.com/~jeff/obdii/ and try
bye