can someone please tell me whats the difference between obd1 and obd 2 i was wanting to know so when i see it i can i.d which one it is thanks owen and if anyone has wiring diagrams for them it would be grate
Well, you model year is going to tell you which you have. The Prius, being make since 2000 will always have the OBD2 and the later Prius had OBD2 but with much of the data on the CAN bus not readable from some of the cheaper OBD2 readers. I have a fairly good/expensive OBD2 reader has worked on most all cars until I got into the Prius, Gen2. Worked to some extent on the Gen1 and gave me some of the P3xxx codes. However, on the will only read the non CAN bus code apperantly. If you need a better discription of the CAN bus data format, I will leave that to someone else. Steve
Wiki is a good place to start. Then search the vendor sites for chips that speak OBD. Their application notes will give you more details than you can image. Bob Wilson
