2015 Prostar J1939 Communication Issues

Discussion in 'International Forum' started by PhilBillyFord6.0, Dec 13, 2019.

  1. PhilBillyFord6.0

    PhilBillyFord6.0 Bobtail Member

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    Dec 13, 2019
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    Hello all, new to the forum, I have been using it recently and getting a lot of good information. Now I'm to a point I figured I may as well make a thread since I can't find what I need so far. I'm working on a 2015 International Prostar with the ISX 15 and Eaton Advantage 10 speed. Truck is having what feels like engagement issues, as though the clutch is intermittently engaging and disengaging unprompted. Has no active codes in Insite or Service Ranger, though has code 5297 logged on Insite, and codes; 13, 22, 36, 74, and an un-numbered code with the description "Engine/transmission match-bad intelligent device or component." Initially Began inspecting physical connections to the tecu and eca, no obvious faults in the harness or connectors. Checked clutch wear and fork adjustment, everything seems ok. Looked up code 5297 on Quickserve, advises of a tsb for this sort of problem with the programming for engine and trans not communicating properly. Unsure if any programming has been done recently that may have caused this. Began basic electrical checks to rule out issues, found the resistance across c and d of the dlc is fluctuating between 50 and 130 ohms, and the voltage is identical at c and d, 2.03 or so. Located Terminating resistors on top of trans and at the def tank, both good at roughly 120 ohms. Began disconnecting modules on the circuit to find where it would change to normal. Initially found the resistance would drop to normal after the truck powered down after key off for about 5-10 minutes. Found BCM has battery power, unplugged the tan j5 connector and resistance changed to normal. Tried putting a donor bcm on the truck no change. Began removing pins from j5 to see which ones caused the change, none found except pins f2 and f3, for j1939. Still no change. Removed all modules from circuit; ecmc, abs, tech, bcm, and both terminating resistors and I am still getting about 120 ohms at c and d. The only other module associated with this circuit is the predictive cruise module but the truck does not have a radar eye on the front and i believe predates Internationals system anyways. If anyone can provide any insight experiences or possible explanations, or point out what in doing wrong, I would greatly appreciate it.
     
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  3. Heavyd

    Heavyd Road Train Member

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    Ok, I would start by pulling fuses one by one for any electronic module while watching your C to D resistance. Depending on the options ordered, on the 1939 you'll have the engine, trans, abs, body controller, cluster, compass module, tire pressure monitor, driver info display and front radar. So go through the back of the fuse panel cover and pull fuses for any of these and see what your resistance is and go from there. A common bad spot for the 1939 is right at the "Y" butt connectors between the main trunk and branch to the abs module which is located on the right side of the cab below the fuse panel mounted on the wall just above the floor. The butt connectors are very poorly done from the factory.
     
    Packer1077 Thanks this.
  4. PhilBillyFord6.0

    PhilBillyFord6.0 Bobtail Member

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    Dec 13, 2019
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    Gotcha, I'll try those things on Monday when I'm back in the shop. I was looking at the harness over on the passenger side but I hadn't cut it out yet. It's just so odd that there still resistance as though there is a resistor even though both are removed and all modules disconnected. Shouldn't it be open or low resistance?
     
  5. Heavyd

    Heavyd Road Train Member

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    Ok, sorry, I re-read your post. The resistor by the DEF is for the engine private datalink for only the SCR stuff. Separate data link all together. The other terminating isn't always in the same place, but should be along the left frame rail under the cab somewhere sticking out of a main harness.
     
    Packer1077 Thanks this.
  6. PhilBillyFord6.0

    PhilBillyFord6.0 Bobtail Member

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    That is what I was thinking also, but I looked up and down the frame, to no avail. I'll have to search again.
     
  7. Heavyd

    Heavyd Road Train Member

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    They can be hard to find.
     
  8. PhilBillyFord6.0

    PhilBillyFord6.0 Bobtail Member

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    Dec 13, 2019
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    Ok, I have looked this truck up and down, removed panels, cut almost every zip tie, finally isolated the resistance to inside the cab, and i can still not find any other resistors.
     
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