What you have is a code reader that is CAN compliant. Every code reader sold in a year or two will be CAN compliant. There are two different sides to on board diagnostics, there is the global obd side then there is the manufacture side and they are very very different.Originally posted by ZiG-87
mmh, not in this case. There's a protocol called Subaru Select Monitor (http://www.fhi.co.jp/english/news/pr.../04_05_18e.htm) that does things like talk to the transmission/differential controller, check sensor calibrations etc. It's not part of the OBDii system but it uses the same port.
In any case, say you're a tech and you get a car in with a CEL and it turns out to be an evap code. Where would you start looking? First thing I'd check would be the gas cap. Now ask me how many cars I've seen come in, with a CEL, evap code, and "look at that the gas cap was loose. Tighten, recheck, gone. Kick it out and move on."
eh, maybe I'm just bitter.
When I deal with a p0440 or any evap leak code, I plug the scanner in and shut the vent valve with it. Then I hook up the evap smoke machine up and fill the system full of smoke. If it is a loose cap, I will put the cap on correctly then force the evap leak monitor to run to make sure I have fixed the problem. After the monitor has run I know for sure the evap system is fixed and will not set another code. For that you are paying $130 and you are at the shop once not casing your tail in circles throwing parts at it.