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Hello! I now build in total 4 and sold 3. If someone need a complete ECU as descibed before I will sell them for 200$ + shipment. Christian

Hello all. Sorry for the late answer, but due heavy work I did not found the time to answer. After 2000 miles I must admit that the Arduino and CTIS do a great job. It works like a sharm, every 15 minutes checks the pressure and adjust it. No problems after all. More problems with broken...

For everyone that want build a new CTIS ECU: Don't forget flyback diodes, it drove me crazy trying out why sometimes the Arduino reset without any reason when shutting off the valves... Seems that no diodes are in the solenoids... Happy hacking! Christian

Hello Forum. Time is running and project is going on. I finish the configuration mode that enable (when you short a contact inside) to manually inflate / deflate the tires and to save the actual pressure as new default pressure for the 4 diffrent modes. I also add a switch to cutoff the power in...

On my truck only the ECU was changed, for sure. All the rest is original and never touched. But anyway, now with the new self made ECU works, and that is the most important thing... Thanks and regards from Italy! Christian

Yes, quite sure that there are diffrent wheel valves, transducer and ECU. I have a ECU with highway pressure about 95psi on a M1078, perhaps it's a 80psi ECU for a 939 or M1089 truck. With that ECU my CTIS was not able to get highway pressure and tires went overinflated... Christian

Hello Ronmar. No, I don't use the wet tank switch for inflation time. Only for starting the system. Here are the steps: - open control valve - after 3 seconds: open inflate valve - after 3 seconds: close inflate valve - after 30 seconds: check pressure - if too low: inflate: -- open inflate...

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...

Why not relays? Using some industrial relay is more reliable than PWM, and in emergency can control manually... Christian

Sounds very intresting. Thank you very much for the information! @Ronmar: I will be more than happy if you share some pics and info about your solution. Thank you very much! I would like to have a system like the original ECU, where you can select the ground type, maybe with display to see...

Hello again. Please don't misunderstand me. It's not because it is not working, but I like to have a spare part of this component. On web actually I cannot find any seller that sells the controller. This is why I was thinking to make a rebuild of it. Christian

Hello forum. I am thinking of creating a Arduino hack for the CTIS controller for M1078, first and maybe second generation. I gave a very fast look at the system and seems not really complicated. Does anyone have some information or a workflow diagram, some sensor value or something else that...