.

Basically, all I need to know is what measurements does the SDD software want when I get to the first screen for data entry? Does it want the actual measurements or is this where I put in the measurements that I want? Similarly, after it goes through the levelling process and I am presented again with the data entry screen and what does it want here, the actual or the measurements I set it at?

Thanks and sorry for the duplicate posts. Mod please move this to the appropriate thread.

Cheers!
Brian

 

Its been a while since I have done this.

SDD wants the actual measurements both times.

The vertical measurement is taken from the center of the wheel to the wheel arch if I remember correctly.

 

Thank you. It was driving me batty because I would always get the "suspension calibration failed" message. I am trying to give it a a softer ride but I have to go through the diagnostics routine for that. This should help greatly. As soon as the sun comes up I will give it a try.

 

You will not be able to change the degree of softness/hardness of the air struts that setting is a fixed characteristic of the strut/damper employed.

Having said that ,on the XJR at least , ride stiffness is adjusted during spirited driving and that is entirely based on the pressure of air in the air bag. SO in theory..............

Normally aspirated XJs of that year had softer air struts than the XJRs because of the type of strut inside the air bag setup.

You can "fool" the car into thinking it is at the factory ride height settings by putting in made up measurements so that it rides ether a bit lower or a bit higher.

The sensors at each wheel, either 3 or 4 depending on the year, are mechanical using a lever mechanism to "sense" height.

In theory you could adjust their positioning to fool the cars computer but have not heard of anyone doing that.

They are clamped in place.

 

you just put washers to lower it

raising can’t be that hard either

 

https://www.jaguarforums.com/forum/x...ur-x350-75369/

 

Confirms what I stated in post #4.

On my 2013 Range Rover Sport I can adjust the height by pushing buttons on the center console.

Not sure why anyone would want to mess with that using after market rods.