Join Date: Sep 2002
Location: Côte d'Azur, France.
Re: OBD-II software
I'm here alright, but unfortunately I'm not a magician, and I'm hardly able to help you. There are quite a many things that can be wrong, it's basicly the game of elimination.
- RS ports in laptop PCs can be crap. The voltage levels may not be correct enough for external devices to function correctly. And static electricity may have killed your port already. It happens. If you have access to an another laptop to try with...
- There can be some other program(s) or background processes using your COM port already. If so, trying to use it for OBD interface will probably fail. Have a look on your Device Manager. What happens if, using Command Prompt you say "echo blaablaa > COM1:"?
- What is your OS? XP? You might have overlapping interrupts with OTHER devices. If so, it will not work. XP should however be able to handle this issue reasonably... should. Check for IRQ conflicts...
- You are using SCANTOOL software with VAGCOM interface hardware, if I understood it right. I have no idea if it should work even in theory? I've seen SCANTOOL to work with a 2003 JTS, but yours is an older vintage. You might be looking at mission impossible here.
AFAIK, most compatible, reasonably priced OBD device/software for European vehicles is the one that I've documented - you've seen the links.
I wish you luck,
Edit: OBD-II and EOBD connector wirings are the same: pin 7 for K line and pin 15 for L-line (ISO 9141-2 and ISO 14230-4). Signal ground is pin 5, positive voltage at pin 16. HTH.