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Thank you! Yes, but I don't know what's the range the original pressure transducer. It's 120 or 150 psi transducer?

Hello all! Yes, I am thinking about putting the source code on github or something like that under the GNU GPL license to share it. It is in early state, like a beta version, and I need to make it more universal, not just for my truck. Like putting a manual control and to be able to set every...

Hello again. Finally I got time to publish a picture. After hours of trial and error (my fault) I finally got the new CTIS to work. I can now set any pressure for emergency, sand, XC and highway mode. Plus I got some info what is the CTIS status, like air tank pressure switch, state of the...

Yes maybe, but for a M1078 the Arduino is enough because no CAN bus is available... And for debugging the USB port is more than enough...

Hello Tom. I think I will make a circuit board when finish yes. Probably I will put the sketch on the board here, but let's see if it's working. Any info about the voltage of the solenoids? Christian

Hello again. I'm moving on, the software itself is near ready to use... A quick question about the PCU solenoids: On a M1078 are they 12V or 24V? If the hole system is 24V I think they should be also 24V. Someone have the correct voltage? I search on the other threads but nowhere exact info...

No, he change the ECU because the old one did not work. He put the only one that is working, and that is the M939 wrecker ECU... Christian

Interesting indeed. I did a unwanted chalk test some days ago, with 90psi. This pressure is definitivly too high, The tires have only in the middle (60-70%) ground contact. 60 psi looks more natural.. :-) Christian

Hello! The solution was simple: I tighten the nut between transmission case and fitting and leak stopped. Now OK for 300 miles. Thanks for the support! Christian

I'm proud to be member of this fantastic forum, much better than other forums where the netiquette don't exist... :-) I bough it from a german seller of military trucks. He also made the frame for habitat and second gas tank. The original ECU have 5 solid ligths (I have it), so he switch from...

Hello all. Today I dig a little bit more. Seems that there are 2 diffrent valves for 2 diffrent pressures: https://www.oshkoshequipment.com/products/detail/84/1755/CTIS%2DWheel%2DValve%2DKit%2DRear%2DWheel%2D90PSI (for 90psi)...

I did all the job... Interiour of cab and habitat, external painting of whole truck etc... :-) Christian

The pressures are: highway: 95psi, tires don't loose air, but CTIS continues to inflate. cross country: 60psi, working perfect sand: 40psi: working perfect So I also think it's a MTV ECU, but I don't know if I should happy or not... I don't know if all the components (wheel valve, PCU, QRV...

Yes you are right, but strange thing is that ctis don't work only with the 95psi pressure. I am scared about the high pressure, on front tiresbI got 95 psi, and max psi for tire is 95. I would be more than happy if pressure is around 75/80 psi, but staying so near on max is scaring me... What I...

Hello Coachgo! I verify the pressure and in fact is above 90 psi. Main problem is that the ctis does not work with this pressure, continue to inflate, recycle everytime, pressure test after 30 seconds is always negative, so starts again to inflate. What should be possible is to insert a...

Hello again. Now I am quite sure to found the reason. I gave a look to the ECU and as immagined it's not original. I did the following tests: - deflate to cross country: works well, stops at 60psi and stay stable - deflate to sand: works also, stops at 40psi and stay stable - inflate again to...

Yes, I use shop air to the truck. Today I need to recheck it again. I untighten the banjo skrews, let's see if some tire has diffrent pressure... Thank you very much! Christian

Hello again. I'm now quite sure that the ECU is from a FMTV 5 ton truck. That can explain why the pressure is so high. Are the ECU compatible with the original pressure transducer on the PCU? If I change the pressure transducer on the PCU, makes diffrence? It's possible to change pressure...

Hello all! Thank you for your infos. @coachgo: I have Goodyear MV/T tires, weight is about 19.800 lbs (9000kg). I untighten the banjo skrews and seems no wheel is loosing air. But today I will make the soap water test. I'm quite sure that the ECU is not original, it was replaced from another...

Hello forum. I know that there are a lot of CTIS threads, but I didn't found any usefull info, probably because I am blind... Sorry about it :shrugs: I have a M1078 with CTIS partially working. I will try to explain what happen: - Air tank is full at 120psi - CTIS starting to work (hwy...