experimental cheap and relatively easy scantool - Page 5 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-01-2004, 10:34 PM   #41
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Originally Posted by A Bonnie Canuck
Okay, I set it up and ran it again for a screen shot. I put it at the spot that it actually received a single packet albiet a bad checksum.
Heh, I can't read that at all Send me a copy of it at its original resolution?

-b
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Old 04-08-2004, 12:29 PM   #42
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Here'* the latest update on turning my WinCE PDA into a portable ECM datalogger: it ain't gonna happen. I hacked together a simple program to send requests, monitor replies, and save it all in a CarBytes data file format, but unfortunately my PDA'* UART isn't quite as friendly as the one in most desktops, and it refuses to communicate at any data rate other than the standards: 9600, 14400, 19200, etc. I tried fooling it, but the little Jornada wasn't having any of my shenanigans. So short of writing a new serial driver or getting a CompactFlash serial card (I priced them -- the kind I'd need are more expensive than a scantool), I'm out of luck. Guess I'll just have to rig up some way to put one of my extraneous desktops in the trunk to log data.

So how'* everyone else doing? I know a couple of people were building the same circuit and working a few bugs out -- did anyone get it all to work? Or give up and take a sledgehammer to it?

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Old 05-24-2004, 04:42 PM   #43
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Is it possible to use an OBD1 scantool (relatively cheap) with an adapter cable to
run on a 95 SSEi. Is it this simple, or is there more to it? Could i just make my own adapter, since we are only dealing with three wires, 12v,Gnd and data, this would seem pretty easy. Autozone sells OBD1 scantools for around $40.
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Old 05-24-2004, 05:33 PM   #44
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Quote:
Originally Posted by GreenMachine
Is it possible to use an OBD1 scantool (relatively cheap) with an adapter cable to
run on a 95 SSEi. Is it this simple, or is there more to it? Could i just make my own adapter, since we are only dealing with three wires, 12v,Gnd and data, this would seem pretty easy. Autozone sells OBD1 scantools for around $40.
All the cheap OBD-I "scantools" I've seen are just dash light blinkers; i.e., you plug them in and it makes the SES light blink any stored codes. Even with the '95s I think you can do that with a paper clip. See techinfo.

But yes, you could certainly rig up your own adapter cable. See some of the posts above for the hybrid pinouts.

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Old 05-24-2004, 06:52 PM   #45
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My circuit is on the shelf right now collecting dust.... I may get back to it again later, I just got busy with other things.
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Old 05-24-2004, 07:10 PM   #46
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I wouldn't mind doing the paper clip thing if it would give me the info I need. I heard that it doesn't work on the 95 with OBDII connector. If that'* not true, then how do I get it to work? I once got the performance ride light to flash codes, but I think that was for the electronic ride controller. I could never get the SES light to blink.
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Old 05-24-2004, 09:47 PM   #47
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Quote:
Originally Posted by GreenMachine
I wouldn't mind doing the paper clip thing if it would give me the info I need. I heard that it doesn't work on the 95 with OBDII connector. If that'* not true, then how do I get it to work? I once got the performance ride light to flash codes, but I think that was for the electronic ride controller. I could never get the SES light to blink.
Ugh, I know I saw a (complete) pinout for the '95 hybrid connector that included the paper clip trick, but I can't find it now. I'll look harder and get back to you.

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Old 05-24-2004, 11:28 PM   #48
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just for the record, my '87 has the big connector (like the 92 bonnies) (NOT THE 6-pin connectors) So it seems like this set up may work on mine. I think i'll give it a try sometime. I really want to check out these sorts of things!

Nice work,
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Old 05-25-2004, 12:55 AM   #49
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Thanks enmityst. I'm looking forward to it.
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Old 05-26-2004, 11:51 PM   #50
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Okay, so I've looked high and low on my disks, internet bookmarks, and manuals, and I can't find the pinout that I spoke of. Without that, it would be foolhardy to attempt the paper clip trick, as you might create a very nasty short and blow things up, nor would it really be possible to rewire one of the cheap OBD-I things without it. The pinout in my service manual only lists three pins: +12V, ground, and serial data. There are obviously more pins than that in the DLC, but I'm not sure how we'd find out what they correspond to. :(

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