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After replacing all 4 shocks, 4 sensors, pump, valve
car still losing air. Pump starting every 5 - 7 minutes
effecting low beam lights. I maybe wrong and low beam
have it own issue never the less my driving after dark is
severely impeded.
I think the problem with car level. Because shocks losing air,
and front is just above 1 instead of 2 fingers between tire and
wheel well lights turns off. New level sensors, as I understand,
help to raise car turning lights on, shocks start losing air lights
turning off making lights flickering. But I'm maybe wrong.
Did you recalibrate your heights, for each wheel, when you changed out components? Bad ground most likely for lights flickering. Remote possibility - voltage drop caused by light's ground causes instantaneous incorrect reading from height sensors, which then gets corrected and depletes air reservoir.
Your lights are auto leveling? Is that working because it sounds like it is not? Do they do the startup sweep up and down?
Note you will lose the self leveling if the head lights are disconnected with the power on. It can ONLY be reset using the factory SDD system.
Yes check for rotted off ground studs as you have an Aluminum body car and with age this is a common problem. There are a bunch front and rear which shows how important grounding is on an Aluminum bodied car. They commonly look fine but with a touch they just fall off. I replace them with SS bolts of the same diameter and thread. Do your wipers work properly? That can be another sign of ground problems.
Here is a page from the electrical guide showing the ground stud locations. I count 27 individual grounding points!
Have you looked at the air compressor? It will be completely filled with water at this point. So consider removing it. Dry out the desiccant beads (Or replace them) and probably rebuild the compressor using Bagpiping Andy's kit. Air Compressor Rebuild Kit
Yes you will again need SDD to level the suspension. SDD is the factory diagnosis tool used by Jaguar in their dealerships. It's not trivial to install and get a system going but it is doable if your interested?
Note again that there are tricks you can play with SDD when leveling the car if you have problems.
Do you have the service manual for your car? I have that plus an electrical guide and the factory air suspension training guide but they are all too big for this forum. If your serious I can put them on the web somewhere for you to download?
Do some searches on setting up a working SDD. This is a big job and maybe you won't want to do it?
I could never work on my car without a working SDD. I find it essential.
Finally as much as I hate to suggest it but are you aware of the steel spring conversion kit from Arnott?
Can't get to their US web site right now but here is the Europe site and at least you can see what I am talking about? Arnott Spring Conversion Kit
I have spent weeks trying to repair and level these cars and I finally gave in and got rid of the air suspension and installed springs. That fixes permanently the worst problem on this model of Jaguar!
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Last edited by clubairth1; 10-30-2023 at 12:48 PM.
How many modules there is involved in leveling/calibrating shocks?
My Jaguar dealer want me to pay for diagnostic $198 Canadian for
something I already know what need to be fixed. To make their point
service dept would like me to tell them which of them I wount like
to be setup. Is there more than 1 module involved in calibration?
If I understand you correctly, they are asking you which one of the shocks you would like to have calibrated?
If my assumption is correct, then they do not have a clue about how the process works, because it is one go for all 4 shocks.
When starting the ride height calibration process with SDD (the original Jaguar software, as mentioned above), SDD will ask you to measure the ride height on all for corners of the car and insert the values into the system, and then it will do the calibration to set the car to the correct level on all for corners.
It will then ask you to re-measure the ride height values again to confirm that every thing is fine.
Right, that is what I've figured out. I have replaced shocks, pump, sensors and control valve
and I'vetold repair shop what manual suggested shop shold do but do but in Canada dealers
are using "diagnostic gimmick" only to confirm what I've told them what I want them to do,
calibrate my sensors.
BTW, does anybody know how long it will take using SDD to do that job?
It's been some time that I did the job, but if I remember correctly, it's something around 30 min for the process itself. With setting up everything, maybe one hour max.
As workshops knowing the X350 are scarce in the area where I live, I do all the maintenance/repairs myself and also have bought everything needed to run SDD.
BTW, when using SDD, the battery of the car has to be connected to a stabilized power supply delivering 13.8 V and up to 30 amp. During the diagnostic process, all modules of the car are powered up and drain something around 20 amp, which means that the battery will not last long on its own. And when the battery fails during a diagnostic process, it may a cause a trip in the module that is being worked on.
And no, a "normal" battery charger will not be up to the job...
I do not want to scare you, but just warn you to make sure that the workshop follows this procedure.
P.S.:
clubairth1 asked you whether you have the workshop manuals and offered you to send them, but there is no need for that, because they can be found here in the forum and also can be downloaded:
Yes but people have reported problems with downloading. So I am happy to hear the links are still working!
Your so right that the stickies have tons of great information but many don't want to search to find things.
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10-28-2023, 03:22 PM
Suspention level effects low beam
