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#1
07-31-2007, 11:03 AM
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OBD-II, data logging on a '95
Hi, everyone.
I am looking into getting a laptop OBD-II adapter from AutoTap. I already have a basic one that reads PXXXX codes, but I would like one where I can read live data for diagnosing problems on my '95 Blazer. My Blazer is one of the early OBD-II cars, and interfaces fine with my Actron code scanner, but since it is a '95 it was made before OBD-II was mandated on all cars. AutoTap says that it is not compatible, but since my current scan tool works, I think it may. Does anyone know if this would be fully compatible, past retrieving and erasing codes? Does the '95 support live data logging? 
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#2
07-31-2007, 11:29 AM
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Re: OBD-II, data logging on a '95
I have an AutoTap program as well, and it doesn't communicate fully with the OBD-1½ systems. That's why I have an MT-2500, although the data logging feature is somewhat limited (to 30-second "movies"), it can at least capture data. AutoTap works reasonably well for anything 1996-newer (true OBD-II).
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#3
07-31-2007, 12:16 PM
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Re: OBD-II, data logging on a '95
I have a 95 Jimmy. I can watch live data on my Auto Xray xp240. My 95 requires the vehicle specific connector. It does not have an OBDI or OBDII connector, it is a specific GM connector which I got with the auto Xray.
When the EGR pintle got stuck due to a piece of carbon I was able to see the pintle position ( open at idle which of course it should never be). When the egr is working properly I can read it's position and watch it change as I drive. I can't recall all the live data I can read but a few are RPM's - vehicle speed - map - egr - TPS - engine temp - run time - volts - lean/rich - AC on or off - brake on or off - tcc on or off - in park or not - oxy sensor etc etc.
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#4
07-31-2007, 12:23 PM
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Re: OBD-II, data logging on a '95
No OBD-II connecter? Strange!
Apparently GM did all sorts of crazy things back then...I've been doing lots of research and it seems that there are some S-10s with the OBD-II connector that are NOT OBD-II, some without the OBD-II connecter at all, and some that are true OBD-II. Apparently the way to find out is look at the connector under the dash and see if pin 2 is populated, and 10 is empty. If this is true, apparently it's OBD-II. Mine is. Also, under the hood, on one of the emissions labels, in the bottom right corner it says in very small print "OBD-II certified". Here's a good thread on the subject.... http://www.obdii.com/ubb/Forum2/HTML/000250.html Mine is an early build '95 Blazer LT, built in 11/04, and it's OBD-II.... After sending 5 emails back and forth to the guys at autotap, I think it'll work!
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