cabledawgrunner

Alright Gents, I have used our search bar and haven't come up with anything as far as where to get the proper OBD I scanner. I have what I am pretty sure is an EGR issue, but would like to confirm prior to purchasing parts. O'riellys and Auto Zone only carry 2's and I will die before I pay Toyota a buck to read a code. That being said, where have you guys purchased your scanners and have you needed to purchase any type of adapter? I appreciate the help in advance. Cheers.

scope103

Seriously? Gosh, I think this is discussed about 3 times a week.

Here's the procedure: http://web.archive.org/web/201211190...85diagnosi.pdf
It calls for using SST (Special Service Tool) 09843–18020 I think those are still available, but if you can't find one, this is what you will use:
https://www.staples.com/Staples-1-Pa...product_525931
I hope you are not put off by the price.

arlindsay1992

iTrader: (8)

Office Depot sells them.

In all seriousness, you can jump two connectors, turn the key to "on" but don't start the truck and count the blinks of the CEL. This is the "Code" which refers back to a small table so you can find your issue. See the following links:

http://www.lcengineering.com/LCTechPages/engtech12.html

http://www.lcengineering.com/LCTechPages/engtech13.html

I saw a scan tool on the shelf at Advance Auto Parts that claims to do Toyota OBD-I but it was pretty pricey, $299.99 if I recall correctly. And I don't know what else it would be able to tell you besides perhaps some of the sensor parameters the computer sees. You could also try eBay for some old professional scan tools which were what the shops would have used back in the day.

RJR

If your vehicle is later than about 1992, there indeed is additional sensor data available at the diag port that a proprietary Toyota OBD I scanner can read, and maybe a $300 one from AutoZone could do the same. The sensors available are TPS, VAFM, ECT, O2 sensor, RPM, MPH, ignition timing advance, and injector pulse width. Might be a few others that have slipped my mind. However, the data update rate is slow (~ once per second) and is nowhere near as useful for engine tuning as the OBD II data stream on later vehicles. A few years ago I built a computer interface to read it - the code and instructions are here:
OBD I Diag port reader You'll need a USB to serial port (RS-232) interface, and some electronic/soldering expertise to make it work.

But, for starters, use the paper clip to read the codes, and go from there.

cabledawgrunner

See I saw that you made a very similar reply to someone else with the link. Honestly I thought you were just being a jerk which text can be completely misinterpreted. I took that knowledge and then went to YouTube. I have a code 71. Thanks

cabledawgrunner

I did exactly that. I got a code 71 so it is the EGR. Thanks for your help everyone.

slow-mo

Even though you have your answer, for an actual OBD-1 scan tool, I have an old Vetronix Tech-1A with the Asian Imports cartridge I bought on ebay. It still needs the appropriate adapter cable.

Since my '87 had a carburetor, it did not have all the EFI ECU computer to read, but I used it on my 1991 Mazda B2600i which did have an EFI ECU to read and did. I initially bought it for my '95 Isuzu Trooper.

I also believe the old Snap On MT-2500 "brick", scanner also works with the appropriate cartridge, key, and cord. Those can be found on ebay as well.