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Old 04-12-2016, 10:14 PM   #1
Mini-Skoolie
 
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Obd?

I have a 1997 Thomas RE with a Cummins 5.9 and a Allson MT643. Is there a OBD port on the engine or some sort of computer output on the tranny?
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Old 04-12-2016, 11:00 PM   #2
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Location: Montana
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Year: 1995
Coachwork: Blue Bird
Chassis: All-American R/E
Engine: 8.3 Cummins
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I know for sure the 643 is all mechanical. I dont think the 5.9 that year is OBD compliant but not positive. Someone that knows will chime in.
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Old 04-12-2016, 11:14 PM   #3
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Year: 1997
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Engine: 5.9
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I heard the 640 is all mechanical.
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Old 04-13-2016, 06:46 AM   #4
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Join Date: Dec 2014
Location: Russell, Kansas
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Year: 1989
Coachwork: Thomas
Chassis: Saf-T-Liner ER
Engine: 3208 CAT/MT643 tranny
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That year is kinda fuzzy as far as computerization is concerned. I know my '94 International 9600 was a Cat 3406E (electronic), the '92 was a Cat 3406B, thus mechanical. The Cummins family was a bit different in that area. IIRC (and do NOT hold me to this), the 5.9 became electronic in '99. I know the ISC is electronic.

Hope this helps.

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Old 04-13-2016, 07:44 AM   #5
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Year: 1991
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Engine: DT360
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the bigger question to ask is what are you looking to do? if you are looking to make improvements or changes, there are things that can be done even on mechanical drivetrains..

-Christopher
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Old 04-13-2016, 11:09 AM   #6
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Year: 1999
Coachwork: Bluebird
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Engine: T444E
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I 'm not sure if you have it but look under the dash for a hook up, it should be round connector where you plug a computer into, maybe 9 or 12 pins in it
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Old 04-13-2016, 12:07 PM   #7
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No computer for the tranny. Is the cummins 12 or 24v? What are you trying to do?
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Old 04-13-2016, 12:30 PM   #8
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Thanks for the responses guys. I'm just looking for information and error codes. I'm a bit of a geek that way. Everything is working fine, as far as I know.
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Old 04-13-2016, 05:55 PM   #9
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Year: 2000
Chassis: Blue Bird
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If that Cummins 5.9 has a computer it'll also have "24 VALVE" emblazoned on the top of the valve cover. If it does have a computer, it will have a diagnostic port but it won't be OBD-II. For that era it'll be a round connector and at a protocol level will be SAE J1708, which electrically is an open-collector RS-485 interface. Usually there would be a diagnostic port in the driver's seat area and, it having a rear engine, there would be another connector in the engine area.
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Old 12-18-2016, 06:56 AM   #10
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Obd 2

Does a 1999 international t444e have a obd 2 hook up? I'm looking buy the bus and it would be nice to hook a scan gauge up to it. And is $2500 a good deal on this bus it's a bluebird with 85,000 on it?
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