On the version of JLR 125 that I have…my computer is in some kind of internal loop of the program that keeps cycling for over an hour while waiting to input the height values for all 4 corners of my 05 Jag VDP…in other words I am never prompted to get to that part of the program where you can enter the values. Is there a work around that will allow you to only program the values into the program without the air suspension having to level itself???

STRACAT (Larry Brown)

 

Wait longer or try it again? SDD is hard to work with and it does not tell you what's going on.
.
.
.

 

Did your SDD already work correctly before?
If not, reload it, it may have a few corrupted files

 

Hi Larry,

Sorry for the late reply, but I have had the same problem with SDD versions 131.03 and 134, specifically on an '05. I think I finally got it to work by releasing the Mongoose, turning off the car's ignition, rebooting the laptop, re-attaching the Mongoose, re-starting SDD, and starting a new Session in SDD instead of continuing the previous one.

BTW, if you find that the ride height calibration doesn't result in the vehicle as level as you would like, you can "lie" to SDD by telling it a corner is higher or lower than it really is to get SDD to lower or raise that corner more than it has previously. For more details see Cambo's thread on How to Lower Your X350. My impression is that the ride height sensors are either not very precise to begin with, or lose some of their precision as they age, so you may have to fool SDD to get it to adjust the ride height until it is as close as possible to the ride height specs at all four corners.

Cheers,

Don

 

I have a C2302 "Levelling plausibility error" code from my SSD 130. I was using the Compressor repair kit with no result. Then a new Compressor with no result.
The "leveling loop" from SDD 130, starts the car goes up to his maximum at 3 corners. The left back is still down and goes 1cm up and than down and up and down. It takes about 20s for up and down, but never gets to his maximum and the leveling loop don't stop. Only by stop the engine.
All pipes are save.
What do you think, new air spring?
kind regards
Torsten

 

Hi Torsten,

It does sound like your rear left air spring is leaking rapidly. One thing you can check is the O-ring on the pressure retention valve, which is the brass cylindrical component into which the air hose fitting threads. You can carefully turn the brass valve out of the air spring with a pair of Channellock pliers (locking pliers, water pump pliers, tongue-and-groove pliers, adjustable pliers, Knipex pliers). There is a small rubber O-ring on the threaded fitting of the valve that sometimes leaks. The O-ring is a standard metric size and is easily replaceable.

Cheers,

Don

 

Hi Don,
thank you very much. I Think this goes into the right direction. In your article https://www.jaguarforums.com/forum/x...ration-174819/
you wrote about it

"Air Springs/Dampers (Shock Absorbers):
Pressure-retaining valves (PRVs) in each air spring ensure that a minimum of 3 bar / 43.5 psi remain in the air bladder to prevent folding or creasing of the rubber bladder that could cause damage. These are not "one-way" valves. They allow air to move in both directions so the ASM can increase or decrease the pressure in the bladder to level the car and maintain proper ride height under all conditions. They are only "one-way" in the sense that they will only allow the pressure in the air spring to be reduced to 3 bar / 43.5 psi and no lower. They willallow the pressure to be reduced from the typical maximum operating pressure of 9 bar / 130.5 psi down to 3 bar / 43.5 psi."

So I come to a different solution. If it is a O-ring, it will lose air over time to zero and the car is down. My one stay at a minimum and don't go up above this point. So I think it is the pressure retention valve. It can hold the minimum of 3bar but not more.
What do you think about this theory?
By the way, this pressure retention valve is hard to find in Germany and not deliverable.
https://www.miessler-automotive.com/...derbein-hinten
Source from China https://de.aliexpress.com/item/32826351574.html?spm=a2g0o.detail.1000014.19.29fae cf9RovYOh&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.40050.28 1175.0&scm_id=1007.40050.281175.0&scm-url=1007.40050.281175.0&pvid=797b8b81-d61b-4809-af23-b2cebc315099&_t=gps-idcDetailBottomMoreOtherSeller,scm-url:1007.40050.281175.0,pvid:797b8b81-d61b-4809-af23-b2cebc315099,tpp_buckets:668%232846%238108%231977& pdp_ext_f=%7B%22sku_id%22%3A%2264866203041%22%2C%2 2sceneId%22%3A%2230050%22%7D&pdp_npi=3%40dis%21EUR %2112.88%214.44%21%21%21%21%21%40211b5e20167861856 38244598e2054%2164866203041%21rec%21DE%21

Thanks
Torsten

Removing the valve
https://www.jaguarforums.com/forum/x...-valve-173105/

 

Here is another TSB on air suspension leaks that might be useful if you don't already have a copy?

Also you can repair the tubing connections as well. They are called "Olive" connectors. The plastic tubing sometimes gets distorted to so you need to shave a short bit off the end of the tube to get it back round.
Here is a thread that might help too?
Air Suspension Problems
.
.
.

 

Thanks,
I already have the TSB but the Thread was helpful to get a bigger picture of it.
Miessler was telling me that they will have a the valve next week. So only just a view days to get to the next step. Time will tell.
Thanks to all
Torsten

 

Miessler has fixed the problem by replacing the damper with a Billstein one. He gave the good advice only to use original parts. The sensors are very fine tuned and will make different problems when they don't get a result in the recommended range. These are the most problems they have to fix. Chines parts!

 

Good to hear Miessler did the Job.
their own Airstruts brand are not good( to not use any other words)