Dana Diagnostic tool software

[littlesfmtv]

I am in a bit of a pickle. I am driving my truck from TN to CO to be built out into an rv and am having some weird ctis issues. True to form, I took the laptop with me that I do not have any of the software on. Is there anyone that can email me a copy or link to where to download? Any help is greatly appreciated.

 

[GeneralDisorder]

What's it doing?

 

[littlesfmtv]

Rear tires keep building psi. Fronts drop. System cycles 5-6 times upon start. If I air down below 80psi and reinflate everything evens back out. I have a tpms sensors on each tire and can see their individual pressures

 

[DeMilitarized]

I sent a PM.

 

[GeneralDisorder]

If you are getting a difference between front and rear then the problem is somewhere after the Tee that splits the control line between the front and rear QRV's. A partial blockage going to front tires could cause the control air to preferentially go to the rear at higher pressures.

Is this the first time you have been on a long road trip with the truck? Have you checked the rear axle breather lines? The hubs on the rear are oil lubed from the differentials and if you are building pressure from heat and it's got nowhere to vent it could be going past the CTIS seals.

I doubt the software will tell you anything useful since the controller is not faulting out and it sees all tires as one big tire. So if you have an imbalance problem then you have a blockage somewhere and it's going to be up to you and your logic to find it.

Edit - it also occurs to me that along with a partial blockage on the front you might also just be seeing the natural tendency of the system for the tire inflation to creep upwards on long drives. For one thing the tires get warm and the pressure in them increases. And then every 15 minutes the system checks pressure and it does so by giving a timed shot of wet tank air to the control line and that actually increases the tire pressure incrementally by a tiny bit each time. Then when you park overnight the tires cool down and when you start up the truck cold it's not unusual for the controller to add air to get them back up to operating pressure again. And all of this depends on the leakage rate (if any) of each tire when they sit overnight, etc. It's not unusual to see the controller go through an inflate cycle on cold start. Though having radically different pressures (more than ~5-10 psi) usually indicates some kind of flow issue or excessive leak rate from a tire or wheel valve, etc. Since when the control lines are pressurized for the pressure check all the tires should be open to the tank and each other so they should equalize over time.

 

[GeneralDisorder]

Here's the software from Dana's site:

LMTV CTIS Question

Hello Everyone, I have run into a holdup on the updated wheel valve release so I am perusing a rebuild kit instead. This kit would include a vented cover and protective bracket, new diaphragm good for -30F operation, and screws. The seat and spring would be your responsibility to clean and...

www.steelsoldiers.com

 

[Ronmar]

Yea sounds like a restriction, and perhaps a leaking wheel valve. Pressure should equalize fairly quickly each time it cycles, if it is not, ctis will fault, same if it is too uneven at the start of a cycle, pressure equalizing causes unstable pressure and the unit faults, so it takes a few cycles to deliver a stable pressure when the controller is looking for it.

Tires will equalize faster on a single axle than from axle to axle due to line/flow friction. path of least resistance is across to the opposite tire.

Fill the system to your desired pressure, then shut down and unplug the controller. Restart and go on your way without the controller tying things together every few minutes, you can then monitor individual tire pressures with your TPMS. I think you will probably find you have one tire on the front with a steady leak/decrease, and each cycle is equalizing it with the opposite front tire...

 

[littlesfmtv]

So here are the forensics:

It would seem the ctis seals are going on both front wheels. Discovered trace oil in both banjo bolts and the diagnostic has an active code for "sluggish valve closing releasing pressure". My current best guess is my valves both have gear oil in them. Thank you for everyone's help! I'm Walmart camping tonight and am going to dig in further in the morning.

 

[GeneralDisorder]

So here are the forensics:

It would seem the ctis seals are going on both front wheels. Discovered trace oil in both banjo bolts and the diagnostic has an active code for "sluggish valve closing releasing pressure". My current best guess is my valves both have gear oil in them. Thank you for everyone's help! I'm Walmart camping tonight and am going to dig in further in the morning.

That is typically a result of the breather on the axle tube being plugged up. Have you cleaned and flow tested all the front hub and axle tube breaher lines and the various junctions behind the frame rails, etc? All of them tee together and head up behind the cab.

 

[littlesfmtv]

That is typically a result of the breather on the axle tube being plugged up. Have you cleaned and flow tested all the front hub and axle tube breaher lines and the various junctions behind the frame rails, etc? All of them tee together and head up behind the cab.

I haven't. I'm going to check them now.