Yeah, another one. lol
Just bought this 2007 Conti GT and the front right bag was blown in the shock. Replaced it and can't get it to air up. Now both wheels on the right are down but the rear one raises a little bit. I have it on a lift and have tried all of the settings with it lifted a little to bottomed out. The pump is running but eventually stops when it realizes that it is pointless.
I checked and there is no air coming to the shock at the line. Replaced the solenoid air block and no joy. Ross-Tech shows the suspension module to be OK (3W5907553). Not sure how to get into the program to individually mess with it. I'm used to using an Autel Maxidas 808 so the Ross-Tech is new to me.

Been working on this for a few days and feel it is just something overlooked. I checked the air lines as best I can and can't find a leak.

Any help would be appreciated and I have searched all of the threads on this and have tried everything I could think of.

Now it's time to bring in the professionals.

What say you?


Ron

 

Yes the above issue has been queried with no solution posted.


A possible leak undetected on the car is the connection between the airbag and strut. View the video between 8 and 9 minutes. This shows how the two pieces come apart. This is a metal to metal interface with an O-ring. When I rebuilt mine we put sealant along with the O-ring. That connection did not feel long-term airtight without sealant.


One way to test each strut is create an identical airline as on the vehicle. Use 1/8-inch nylon tubing ( car parts store) and a male compression fitting. Than use an air compressor (carefully) and see if the strut rises a bit. The fitting is 1/8 in. FIP npt on the strut. Bush up the 1/8 in nylon tubing to the air compressor configuration of your choice . Keep your pressure low at first as to not overload the airbag.

Video attached:

 

Thanks. I actually rebuilt my strut and know exactly which O-ring that you referenced.

I'll try the trick of inflating it manually and see what happens. If anyone has any other ideas......

 

OK, the latest is that the strut IS holding air just fine. The problem seems to be that the air system is not sending air to that strut. Not sure if it is trying and there is a leak somewhere or if it just isn't sending air. The level sensor attached to the control arm appears to be working fine.

Is there a way to isolate that part of the air system through the VAG system?

 

There is the suspention output test, VCDS. This goes through the different functions of each strut at each corner. Select within the suspension address "output test" than go through the various functions.

 

OK, I'll try that.

 

OK, update:

Making some progress but not there yet.

1. The strut IS holding air
2. I am slowly learning the VCDS program

Here's where I am. Removed the strut and checked to make sure that it was holding air. Verified that it is. Still couldn't get air to come out of the hose where it goes into the strut and found out why. The new end that attaches to the top of the strut was not installed correctly (by me) and the end of the hose actually was perfectly sealed against the inside of the valve? at the top. Once correctly installed, I got the strut to partially inflate. MAJOR VICTORY to see that side come up even if only a little bit..

Got into the VCDS program and went through the output test with no results. The pump never came on during the test and air never entered or exited any of the 4 struts. Tried doing it both with the car running and without (key on). I feel like it may be a calibration issue or something. The pump finally came on when I started the car after all of the testing but only partially inflated the struts on the right side. Left side is perfect. Tried changing height and firmness with no luck. I am able to see the ride height in mm on all 4 and of course the ones on the right are in minus values and the left in positive so I know that my ride height sensors are good. No codes on the system.

Any insight on how to "set" the height or calibrate all 4 sides?

Ron

 

I just found this on Y-tube and will try it tomorrow.

 

So this is the latest;

Could not get the compressor to pump up the right front or right rear no matter what I tried. Ended up getting a new module and I have already replaced the air distribution block. Now am getting faults due to the new module and need to marry it to the system.

These are the codes, 01437- Control position not learned
005- No or incorrect basic setting/adaptation

01575- Control switched off
000--

Can't even get into the basic settings because of the codes. When I clear them they pop back up;


Any ideas on how to add the module?

 

Hello @2007Conti ,
I understand that you are new to Ross-Tech VCDS, but, being that you could see the height variations of each corner, and the compressor was running at some point while in your possession, why would you replace the suspension control module ?

Being that you purchased the vehicle with a blown out suspension bag, I would be checking the health of the compressor itself, to see if it can reach anywhere near the 16 bar MAX pressure to the accumulator, the reason the compressor is not coming on as to fault code number 01575, is because that is system off AKA Jack Mode, the other items are adaption and learning, where for adaption you first need to enter the security code by hitting the security tab and entering the code that pops up in the information balloon, iirc it is 31564.

When the compressor was running, how loud was it, what kind of pressure do you get out of the black line right at the compressor valve block ?

The compressor also has a temperature sensor to shut it down when it gets to hot, like when you have a leaking bag, I would check the fuse and the relay for the compressor, and possibly put the original suspension control module back in to see what you get.


Johnny

 

Thanks Johnny.

I'll check to see what bar I was getting. I want to say it was 16 but not too sure. While on the phone with Ross-Tech we could never get the 31564 code to work, only the basic code. I have gotten air to go to that wheel once since I replaced the bag but never very high and also the rear on the same side stays down as well but not as low. Between the guy at RT and I, we tried everything while I had him on the phone (45 minutes).
As far as the Jack mode goes, it would not allow me to take the vehicle out of jack mode. I'll try it again tomorrow. The guy at RT was pretty convinced that it was the module and he is the Bentley expert there as he works on them. To tell you the truth, I am frustrated with this at this point and another $600 for the module was worth it if it fixes the problem.

Thanks for the help, I really appreciate it and I will report back what I find.

Ron

 

@2007Conti ,
Another thing to check is the height and variations measurement of each height sensor, I had an issue with my driver's rear sensor, and then the right front, it was odd, the sensors have 2 different measurements, the drivers rear would show a variation, but no height, and the system would fail to operate, whereas the right front showed height but no variation, I replaced the driver's rear sensor and all was good, it actually had a small hole melted next to the pins on the sensor itself, the right front I sprayed with electric cleaner and she was good for a while, but I just replaced that sensor this past Saturday, now all is good again, I mention this because I have been work with Kilog from Cameroon a member here on 6Speed, for well over a year on many many issues to get a GT up and running, he is now at the suspension issues, I had him pull the rods off the the lower control arms so he could freely move the height sensor arms up or down in small increments to see the readings with measuring blocks on VCDS, he found 2 sensors that gave no movement of reading, he cleaned the connections and got 1 to work, but his compressor is extremely noisy and shuts down quickly due to over heating, and iirc, he only got to 7.xx bar.

So a output test of the compressor would really help us to be sure that you don't have a weak compressor, and I have to ask, do you have the engine running while trying to get the vehicle to raise, are all the doors shut, if the engine is not running, is there a battery charger hooked up during this testing, and how are the batteries ?

As weak batteries will cause issues like you are having, btdt, and sometimes it's better to disconnect both batteries, wait a few minutes, then hook them back up, yes you will have to reset each window, and do NOT move the steering wheel while the batteries are disconnected.

Johnny

 

@2007Conti
Also, your location would help if one of us are close by to help, good excuse for a drive .

Johnny

 

I'm in Winter Haven, Florida. About halfway between Tampa and Orlando. Once this beast is up and running I'd love to take a drive with any forum members.

On the compressor, it isn't noisy. I can hear it when it is on but it isn't excessively loud and my gut tells me that it is OK.
On the ride height sensors, they all change as I lift the car up and down on the lift. I'll check to see if I get a number as well as a variation.
I have been doing all of the testing with the car running. I have a C-Tech on the house battery when the car isn't running and don't believe that the battery is the issue.

It seems like the module intermittenly decides when to send air to the right side. Sometimes partially and sometimes none. Haven't been able to get air to the front right in quite a while now (the one with the bag replacement)

 

Johnny,
Here's what I got:

I put the old module back in so that I could get these readings. At the time of the photos, I had the right side partially jacked up so as not to trigger the "workshop" fault. Looks like the compressor is up to snuff and the height sensors appear to be OK as well.

Is that what you see?