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Would like to run higher tire pressure on my tractor when on road, is this as easy as swapping the control box?
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Using wrecker CTIS controller on other trucks?
- Thread starter RobertoGatos
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If you can find one from a wrecker thats programmed to the higher pressure. Not all are. Any controller can be reprogrammed you just need the Y cable to interface a PC to it.
Will
Will
74M35A2
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Is there any public or known know-how on this? Software, connection cable, procedure, parameters that can be calibrated, etc... Thanks.
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I am working on getting the Y cable part number. It goes between the harness and controller. The software is a free download from Dana.
therooster2001
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I don't know the way it tells / checks but the "wrecker" version can be used in the others but will be at a lower pressure, even when upgraded. The 923's will go to 70 with the new or reprogrammed ones, but the wrecker will go to 90. I have several ECU's and would be happy to be a Guinea pig for the software if someone can loan me a Y cable. I'm a computer geek so right up my alley.
therooster2001
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I knew I had researched this before. It uses the rp1210a protocol and can talk the CAN bus using their software. It's a standard communications box and a heavy truck or mechanic on here might have the right diagnostic tool. I think you can diagnose and also set the parameters of the ECU from this tool. I will ensure that I can get the software and dig out an ancient laptop (new enough for USB, old enough for Window 98!). So who has one of these? 
therooster2001
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therooster2001
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No I meant who has the rp1210a interface box.
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I have it all. The full mil diag setup with software installed on a laptop and the Dana diag program. Just not the Y cable that goes between the harness and ctis control to allow access.
therooster2001
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Be specific, do you have the rp1210a box?
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I have the mil Dearborn protocol adapter boxes both serial and usb versions. I need the y cable though.
therooster2001
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LONG story that I should have posted a bit ago, but I got ahold of a Spicer CTIS guru after some mean phone tag and reroutes, so I'm not sure I know where I ended up. My plan was to send him some CTIS modules so he could "upgrade" them for the 70 set point. He said wasn't possible, even though the manual says so. He explained it to me, which I promptly forgot the details of, and should have posted. He asked another guy who confirmed it wasn't possible. We went down the trail of jumping certain pins to fool it into thinking it was a wrecker, but 90 would have just about killed me on the road, so I declined. Bottom line from the expert was this was not possible. I'm stubborn, so I may go after another avenue. Anyone had any luck in y cables or got a Spicer or Eaton tech in their pocket?
74M35A2
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I bought both sides of the CTIS connector and made a wye ("Y") cable. I downloaded and installed the free Dana diagnostic software. I also then purchased the required $800 interface rp210a adapter. Hooked it all up, confirmed communication with adapter, but could not communicate with the CTIS. End result, is that the required transceiver board is not contained within the M939 series CTIS units. It even has such disclaimer in the Dana/Spicer diagnositc manual on their site.
therooster2001
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Ouch. Maybe I'm not going to be stubborn.
74M35A2
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http://www.steelsoldiers.com/showthread.php?147307-M939-CTIS-Reprogram-Anybody-Done-It I am going to next try and FMTV controller on my 925A2. Seems to be the same except upside down button labeling, and supposedly has the transceiver board which allows a field reprogram of target tire pressures, real time diagnostics, etc....
therooster2001
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Just read that thread, I just peruse the 5-ton, not the hot rodding one, so I missed it. Which ECU's have you tested with? All of mine are Eaton ones, not one Dana /Spicer, so that might be the difference. Agree that the FMTV ones look fine, just upside down, but haven't tried it either. I'll check my ECU's to see if I can't find a different part number. All mine are this one.
162tcat
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I have a wrecker controller. If anyone is interested, pm me
74M35A2
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We're trying to add termination resistors to a harness I made. It may be the key to the lock. We'll see over the weekend. Stay tuned....