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Haven't checked pressure, been working on more critical things (system still works, just have to push the specific button a couple times - it errors out after 30s of deflate time). The relief valve has a spring and there is a little winged nut thread locked in place. A little heat allows the...

It was at 5.5 and I was getting the error, I increased it to 7-8 and the error went away for a while. This is in the dana diagnostic software. Also verified the pressure sensor is reading correctly with a mechanical gauge. It got colder and the issue popped up again...guessing oil in the filters.

20 psi (or anything a couple psi off expected) will cause the controller to error out after 30 seconds of dumping and show to solid lights between the target and higher pressure selections.

I fully rebuilt the wheel valves except for those filters everything else has been replaced. Fully rebuilt the PCU as well. I adjusted the relief valve to get the proper feedback within the Dana software as you can view relief valve pressure. I haven't looked too much but if I see a new...

I adjusted the pcu relief valve pressure, worked great for a while. Guessing I have too much contamination of wheel valve filters as it had more issues when temp dropped. Per spec it has a 1 or 2 psi tolerance...seems a bit sensitive. I have new filters coming and the system still works fine as...

System is working pretty well after rebuilding all wheel valves and associated seals(and a few CTIS hub seals). Still not super happy on deflate - sometimes requires a few pushes of the button due to a relief valve feedback error. Very finiky system that doesn't have well defined specifications...

I'm running just fine on a win10 systems using this converter. https://www.usconverters.com/usb-serial-adapter-xs880 Works great.

Thanks Ronmar, after I took it off I realized it was on the other side...brain fart. Rebuilt the wheel valve and it was a bit crusty and the stainless orifice looked like it had been overtightened as the hex was a little rounded and had burrs. Just refilled the tire and it didn't push any out...

Z and H have power now (was originally Z, M, and H

I'm betting there is just enough of a restriction (most likely wheel valve filter) to keep the valve open. There was some oil in the system so I wouldn't be surprised if those filters lowered their flow a little.

This issue only occured at the increase of pressure to 80+psi with CTIS. At 50ish it wasn't doing it. When in stable state (not bleeding out qrv) all tires hold pressure (after rebuild on 2 that were leaking). Seems like a wheel valve(or two) aren't closing well (aire flow out it pretty fast...

Please clarify your question. There are 3 1911 wires in my truck, I had to cut them check since they are all connected. I have the "first gen" of the black controller, that I got off eBay.

I have an MTV and disconnected M wire only. Now goes to 82 psi hwy(using a very cheap pressure gauge). Problem is, now when I turn off the truck the quick release valves open on the front axle and the rear most axle. My front right tire goes down to 50 psi and my rear right tire goes down to 55...

Nice work! I noticed the "MTV only" wire in the diagrams the other day. I have a 1096 and got an eBay replacement black controller (I believe second of the three versions) and have trying to get my ctis working, chasing leaks. I was able to verify 55psi is the highway setting it currently has...