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Old 10-30-2017, 01:00 PM   #1
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which diagnostic tool / port is this?

Crawling under the dash of our new-to-us 95 Dynasty I see this diagnostic tool.

id love to find out which tool it is and what/ what I might connect to it to run during operation to monitor coach operational health.

thanks in advance for your feedback.Click image for larger version

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Old 10-30-2017, 02:12 PM   #2
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Don't believe it's a diagnostic port. If you have a diesel, the connector will be round. If it's gas, port should have more connection pins.
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Old 10-30-2017, 02:53 PM   #3
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That looks like an OBD I port (on board diagnostics version 1 used from 1982 to 1995).
I doubt you can connect anything to an OBD 1 port that would be worth while.

Most heavy diesels use J1708 or J1939 and like Fisher said, they are round.
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Old 10-30-2017, 04:33 PM   #4
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That's an ALDL (probably GM specification) connector. It appears to be missing the data pins, so it is being used for commands only perhaps. I suspect it is so customized that without getting the diagram you won't figure out what pin is what, other than I believe the upper single pin (on the right) is ground. The three pins on the bottom that are populated are probably not used correctly to allow you to guess.
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Old 10-30-2017, 04:36 PM   #5
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Quote:
Originally Posted by vito.a View Post
...
I doubt you can connect anything to an OBD 1 port that would be worth while. ...
Actually some drive train computers provided significant data on the ODB-1 port. The old Hummer H1s from the mid-90's would provide transmission data to a similar port.

I have a scan tool compatible to these ports too, though the best scan tool I had for them was a PC based application that I ran on my notebook.
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Old 11-01-2017, 04:41 AM   #6
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That is the same as the transmission diagnostic connector on my 96 Windsor.

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Old 11-01-2017, 05:53 AM   #7
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thx for the feedback, all, ill add it to my list of gotta-check.
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Old 11-03-2017, 09:34 AM   #8
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Pretty sure it is for the transmission, 95 is mechanical, no engine computer
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Old 11-03-2017, 11:10 AM   #9
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Quote:
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Pretty sure it is for the transmission, 95 is mechanical, no engine computer
thx for this, much appreciated.
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