Fri Feb 18 02:06:43 2005 From: Jim Blair This may be of interest to you. Figuring out the Renix codex: From: "FOURNIL" Subject: First informations about Renix Diags Hello I have these informations : the RX is a "open collector" the schematics for reading is : VREF --------[1kOhm]---------------< ECU | | | TTL The speed is 10400 Bauds (16µS) Frames begin with "FF" "00" and a double "FF" is only one FF (FF FF => FF) There's a space between a byte, variable because of the CPU usage The ECU send permanently its frames -no dialog for diag... more info to come- Frame format (partial, from memory of my contact): ... Will give you MORE on the next week Hope give you advice to begin work on :-) I'll do my interface this weekend.