So I've been looking for a obd2 to usb interface for my car (2008 subaru legacy 2.5 sohc: canbus: 15765-4 protocol I think) http://www.rlcracing.com/Documents/OBD2.pdf
(don't know the identifier length/ bus speed) http://www.obdtester.com/obd2_protocols
and from my understanding, the tactrix open port 2.0 is the most thorough cord. For $237 that's a lot of $$ considering I have a sohc that I can't really tune, but would enjoy the extra functions for my car though I'm not sure you can through free ssm.
By the way if anyone can tell me what the main differences in ssm and other obd2 programs I would appreciate it. I know ssm (tactrix only option?) is subaru specific and can actually change things and the other can only monitor, but is there any benefit for sohc subarus? Also, is there things that the obd2 (using elm 327:which supports can bus) programs can do that ssm can't?
From what I understand the vag-com cables don't work for certain 2007 models and all 2008+ models to use free ssm. So I decided that maybe I'll go for a cheap ebay/amazon elm 327 (hopefully 1.4b -most updated, don't see cables with the 2.1). So I looked and was gonna buy a cheapo $9 elm327 v1.5??? but read some of the reviews and people were saying how the clone chips don't work well, or don't work at all. So then I was going to pay a little extra more for something that actually had a genuine elm 327 and was gonna buy the elmscan 5 compact
but then I came across this site http://www.glmsoftware.com/ElmScan5Compact.aspx
So pay more and still get a clone will suck.
So I do some more research and find out there's another chip that's supposed to be even better and faster than the elm 327 called stn1110 and cheaper. I was looking for obd2 cords that use the stn1110 chip and find that they are discontinuing it for the stn1170 bluetooth version - arg want hardwiring for computer and have iphone http://ahdesign.us/blog/stn1170-blue...obdii-adapter/
So, with all this information I'm more confused than when I started my search. I mainly want to check my error codes, clear them, monitor stuff to know more about my car and for possible preventative maintenance without installing extra gauges, and anything extra that I don't know about since using the obd2 port is a completely new area for me except for reading and clearing codes. For those of you who know, can enlighten me, and recommend a obd2 to usb interface that will work with my car but as cost efficient as possible I would greatly appreciate the help. If I had an LGT I would just bite the bullet and get a open port 2.0 (tuning options), but I don't so I don't want to shell out that kind of money unnecessarily.