Hello,
I have not had a single issue with my air suspension since I got my beauty x6 years ago. Recently, I went into the mechanics to 'reboot" my left upper control arm ball joint and left rear link. Of course, he dismounted the height sensor. I noticed that after he put everything back, the car rose but not up to its full height. The issue has kept worsening and now the car doesn't rise up by much at the rear. The front also drops up to a certain. All four corners remain there and don't completely droop into the arches. Once I let the car run after starting, the compressor will raise the car a bit. I installed the BPA kit for the compressor about x5 or so years ago. Please have a look at the pics from my Icarsoft diagnostic. I am considering re calibration via SDD but need some shared insight first. Will be grateful.
Best,
Juls

 

And your air struts were last replaced WHEN?

Time for a hands-on, not 'scan tool', old-fashioned "bubble" test?

Top of front shocks generally start with a slow leak, extreme cold weather, only, and at any time after the five year mark.

They do not "self heal", thereafter.

 

"ECU in manufacturer sub-state" happens when you are in the middle of a calibration. The ECU reverts to sub-state to take in the new leveling data. You should also see an air compressor error on the dash too. If you interrupt the calibration, the ECU will remain in manufacturer sub-state and will need a new calibration to run full length. Nothing will work when sub-state error is thrown. No idea if the i930 can do a calibration... I use the V3.0 on my 2005 and fool it into thinking it's calibrating a 2006-2007 as 2005 is not supported for some reason...

 

I'd first verify that he properly reinstalled the height sensor.

 

Not sure it even needs the procedure?

Did my fronts, adhered to the procedure in the Bilstein video, even though using ECAT-less Suncore struts. 'Calibration' was done with a Metric-reading steel tape measure, per Bilstein.


Rears 'inbound' still "to do", but their video is still the same. Tape-measure.


Note that the ignition is OFF, but the battery is NOT disconnected.

An Arnott video gets that part wrong (and not-only).

Perhaps THEN there is a need for Scan-Tool calibration?

I've subsequently also swapped-in a new H8 battery. No effect on the suspension.

 

Thanks Jason.
This is true. I abandoned the calibration after the compressor kept cycling non-stop because both rear shocks wouldn't inflate. I clear the sub-state by activating the customer mode via SDD.

 

Thanks. That is exactly what I had in mind today after I got some time. Unfortunately, the rear shock burst as I jacked up the car at the jacking point.

 

'In the meantime.."

Dunno how hard or easy - or fast or slow - your "supply chain" is in Uganda, but.. whilst out mentally farting about trying to decide whether to stick with Bil$tein$ or 'risk' lesser air struts, I acquired a set of four MaxPee DingRods coil-over struts.
Mere months ago, those coilovers were under US$ 300 the set of four. That maker / marketer, and several others have BETTER coilovers, but these are at least known to the community to work "OK."

"Calibration" is done with spanners - included. I'd guess under one hour per each corner to install... even less time to remove if/as/when new air struts can be had.

'Just for temporary..?" Or start with better ones if NOT just temporary. There are plenty of threads on that.

Fairly easy to migrate back and forth, regardless, so long as you leave the plumbing and sensors etc. "in place".

 

Kindest thanks Bill. Very handy tips!