hey, i dont know too much about OBD-II.. i've been researching to work out what i can get with my carputer.. i know that every car built after 1996 has an OBD-II socket thingo... im not sure where it is in the ae112, but in the zze series, its located on the right side of the drivers side footwell, very near the bonnet release lever... now as far as OBD-II scanners go, you'll need to get 1 of 3 different protocols... its like ISO something, and the other 2 are SAE something... toyota use the ISO protocol... hang on ill get the actual code... ok toyota use ISO 9141 circuitry as far as i can see on this page: http://www.obdii.com/background.html as far as places to get an OBD-II scanner, ebay is a good place to start... they have heaps of scanners that will just show you the engine warning code, and then there's billions of websites you can check what the code means... otherwise you can get an OBD-II serial cable thing that you can plug into your laptop and it will give you real time engine warning and probbaly what they mean and other fancy things... not sure of prices but check ebay - its generally the cheapest...