[Bassasasin]

So you want the protocol language of the codes.. The handshake signal, Baudrate and decode of the pulses. That is which the little cheap scanners already know and do.

Your on a quest.
The 730 ECM communicates on a single serial TTL line with 8192 bps, so you need a small circuit like this to interface between the TTL signal emitted by the ECM and the notebook´s RS-232 COM interface (9pin connector pin# shown). Drawback: It needs a +12V supply, wich can be obtained from the cigarette lighter socket.

http://pweb.de.uu.net/pr-meyer.h/aldlintfmax.gif
http://pweb.de.uu.net/pr-meyer.h/aldl.htm#aldlmon

http://www.techedge.com.au/vehicle/aldl8192/8192hw.htm
http://www.oica.net/htdocs/WWH/OBD/G...d%20signals%22
http://www.geocities.com/MotorCity/S...24/95cam2.html