I bought a couple of the ELM chips intending to do something clever with them but i haven't yet LOL. I'm interested in ODBII on honda vehicles from 1999-2005 which is basic stuff. I also have a scangauge and looked at putting the elm inbetween it and the car and capturing the signals to work out how it did what it does. There are some good ODBII sites on interwebulator.

My particular interest is IMA ODBII codes for the early Honda Hybrids in particular the Mk1 Insight. These codes don't show on the scangauge and need the proprietory £3000 honda scan tools to acess them. I need to borrow one, capture the signals with the elm chip then make something clever with a pic and the elm.

http://www.thinkythings.org/obdii/
http://www.pureenergysystems.com/sto...TestStatus.htm
http://www.obd2crazy.com/tech.html#eint