Hello,
maybe one of colleagues here will be able to help me, my XJ, whom I bought, stands tilted and exactly the right side is higher than the left one (I assume that the left one is good because it has more or less the same height as the front), it turned out that the right sensor was damaged (aw93-3c280-bd) but after replacing it with aw93-3c280-ad the car is still tilted and now I still have a suspension error. Does anyone know for which sensor I should replace it to be ok? maybe I have to replace the left and right as a set?
I will add that the car left and right had the same number or aw93-3c280-bd

I will be grateful for your help.
cheers

 

Jaggy19, replacing the sensor, you may need to recalibrate the ride height as this may be thrown off now. that may fix your height issue. Just a thought. You will need either the special Jaguar height adjuster or a ruler that will measure out to 450 mm. Then you will need either a higher end code reader or the SDD software to calibrate the sensors. A competent indy shop should be able to do this for you for around $150 USD.

 

Thermo, I have mongoose and sdd, after connecting I am able to start the leveling procedure but it ends in error. In the software there is also an option (I don't remember what its name is now) in which you can preview the voltage on the sensors and there the left side oscillates around 2.01V and the right one that has been replaced is around 4V. unless the sensor is installed incorrectly.
In addition, SDD shows that the front also has differences in height and there are no sensors and there were (apparently).

 

The X351 series of cars do not have air suspension at the front, it s steel coils. AFAIK, there is no leveling system at the front.

 

and that would be consistent with the facts.

The question is why sdd shows the difference between the left and right side of 22mm where the difference is maybe 1mm physically.
Could this be caused by a wrong sensor? the one that came had a shorter connecting element than mine.

 

Jaggy19, that could very well be the issue. You need the same dimensions with the level sensor. If the sensor is sitting at a different angle, it will be interpreted as the car sitting at a funny angle.

 

We only replaced the sensor, the connecting arm was the one that was with the original sensor. but this can actually be the reason.
Now I have a bigger problem because I can't get such a sensor anywhere in Poland, they are all with different numbers, some have these connecting elements, but again they are all short, so they won't fit either.
I found matching sensors in the USA but they do not have international shipping

 

hello buddies
I was able to buy an identical sensor with which it was previously. It seems that on both sides we have aw93-3c280-bd (should it be this way?)
I also replaced the suspension valve block, I had to deflate, after changing the car I do not want to raise ... I have a message: Vehicle too low
I tried to inflate the suspension via sdd but the compressor does not start, the ride also has no effect. Is there another way to start the compressor and inflate the suspension?

 

jaggy19, reading the service manual, because you have replaced the ride height sensor, you MUST do a ride height calibration. So, you will need to get a ruler capable of measuring up to 450mm. From there, you can use the SDD to do a ride height calibration. That should then tell the computer that the car is sitting too low and that it then needs to inflate the rear end.

As for pressurizing the system, all that the service manual says is to use the service tool (aka, SDD) and start the vehicle. The manual also talks about using the ride height suspension switch to raise and lower the ride height. I did a look in the service manual and there is no reference to this switch other than the same sentence 4 times about using the switch to adjust the ride height. This may be hidden inside of the SDD.

I would say to start up the car and give it a few minutes to charge up the air tank and whatnot. After that, connect the SDD and see what error codes you are getting and see if the SDD will lead you to some checks that you can do to correct things. Worst case, post the codes here and we will take things from there. I think your initial problem is simply getting to a point where you can calibrate the new ride height sensor.

 

Thanks Thermo,
yesterday I tried to do height calibration but nothing happened, i.e. the procedure started, the first countdown started (inflation), but the compressor did not start, I waited maybe 3-5 min but nothing. The same happens when I start the inflation procedure where I have to ride at idle speed.

I will try today.

 

Does the SDD show any errors?
Have you cleared all codes before starting on the air suspension?
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DTC showed something like this. Of course, the car is still not inflated. As I wrote earlier, the calibration procedure starts, but the first countdown goes on forever, the auto compressor does not respond. I'm starting to think that the suspension module is damaged.

 

and I don't know why it shows me the error of the front left sensor, in my model there is no pneumatic in the front.

 

jaggy19, start with clearing all the codes. If you clear the codes and then it comes back, then you know you have a bad sensor there. The idea behind looking at the front and rear sensors is to know where to put the rear. The system attempts to keep the car level. So, over time, as the spring loose some of their strength, you are not going to end up with a car that is nose down into the pavement (overstated, but you can picture it). Besides, those same sensors are used for other systems in the car like the dynamic suspension and are gathering their information from the ride height module.

Based on the codes that you are showing, I would see if I could program the module. That will tell you if the module is working or not. But, with the loss of communication error and the general module not working codes, that is what it would be appearing to be. That could also possibly explain why the car is seeing the left front sensor not working.

 

Thermo, I am convinced that I have already done this (I am thinking of the programming procedure, error clearing and starting the leveling procedure) so and it did not help but I will try again after the procedure below. In addition, it is strange that after running the manual valve control function in SSD (I do not remember what it was exactly called) the valve control did not work, and before it was ok. I really have no idea why it did not work and yes I could program the module with SDD.

It may be useful to someone, I needed to start the car, so:
in the valve block plug I opened the left and right suspension valves, pins 3 and 8 (-) and 5 (+), then starting the suspension compressor by making a jumper in the R10 relay pins 3 and 5. The suspension inflated. I can ride.

Now the question is whether the rear right sensor is correct, if not what it should be? Can we check it somehow?
And the second question is why the program claims that there are sensors in the front (front of the car is level) if they are not there.

 

Since there are no vertical automatic headlamp adjustment on XJ, to fullfill auto adjustment requirements for Xenon headlights it´s done by controlling whole vehicle by rear height adjustent. To able to do it, system also need to know the height of front axle. So, there are height sensors on front as well.

 

I see the yellow battery health is on?
You need to get it green before doing anything. Otherwise odd results.

I broke down and got a power supply. A battery charger is just not powerful enough.
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the battery is normally green, but after switching on the ignition turns yellow after a while. The voltage on the installation is still at 12.7V

 

Jaggy have you gotten any further on this?
I am having the same issue where my rear right keeps raising up and it doesnt seem to take the correct readings in SDD.

 

If it turns yellow after a while it points to you not having a stout enough power supply hooked to the car.
If at ANY time you have a yellow battery indicator. STOP what your doing and fix that. Now if you just reading codes then yes you can get away with the yellow battery indicator.
But your trying to run module test and that requires a lot of power and you don't want any glitches in the laptop or the car 12VDC while doing that.

What are you using to maintain the battery voltage?
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