Have run some observation tests and it seems that the problem is the air compressor is not being turned on. I have adjusted the height whilst watching the actuators on the bmw software valves are showing as opening ok but the compressor relay either doesn’t open or only opens for a short period.
I have changed the relay and still the same result. System pressure is around 9.6 bar however if I take it for a drive and the suspension doesn’t deactivate its self the pressure will be between 11-12 bar on my return. So compressor is obviously ok.
I am also getting random messages on the software saying that the connection to the ecu was interrupted or error in reading.
I am thinking that possibly the ecu is dying ..
Any thoughts anybody was working fine until a few days ago and has got steadily worse now constantly deactivating itself.

Has anyone any experience of a failed EAS ECU ?

Not heard of one on the forum, usually other components; sensors, valves, compressor, bags, pipework that cause EAS problems.... .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

I have a two year old compressor all new sensors. System not leaking holds pressure fine just not working as it should and shutting its self down. If I clear it I might do 500 yards before it drops out or it may be ok for 3 or 4 days.

Can you get to off road height and lift each corner ? .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Yes but very slowly. What makes me think there is a problem with the ecu is that the software keeps saying that communication with the module has been interrupted.

What diag are you using on this ?

BMW Ipna set to e53 I have used it successfully before on the suspension to calibrate etc. You can also monitor the valves opening and shutting when lifting and lowering. The only thing that seems out of the ordinary is the compressor relay doesn’t always kick in when lifting. Have put a new relay in and no change. Pressure is currently siting at 11.2 bar which is well within range so compressor is obviously ok it should be because it was new 2 years ago.
Sometimes if I reset it I can go for days and all normal other times I reset it and 500 yards down the road it deactivates it’s self???

-02 L322 has unique EAS firmware compared to other MY L322. It has possibility to calibrate offroad, normal and access levels separately. I wonder if BMW E53 INPA scripts have those? Could it be that those calibrations are not aligned and EAS goes nuts? After calibrating all levels with IIDTool my -02 L322 EAS has been trouble free since. -08 3.6 Vogue
-87 951

*double post* -08 3.6 Vogue
-87 951

The bmw software does the same thing you can set all three heights. I had compressor problems a couple of years back fitted a new compressor and re calibrated it with the bmw software and it’s been fine since. Level is not a problem it’s the fact that it keeps turning it’s self of for no apparent reason. It can be sat flat on the drive and do it or it will drive fine for a couple of days then suddenly turn off.

Can you get to off road height and lift each corner manually (back to wheelarch, hands under wheelarch), listening for hissing?
If it is struggling to get to off road height, then you may have a problem with a valve, pipework or bag....

Have you recently jacked up the front of the car, fully extending the suspension ?

As suggested, you probably want a "proper" L322 diagnostic tool to tell you what is going on... .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Yes the front has been jacked up ?

I recently had a front air bag leak intermittently causing the odd issue I suggest putting it in off road height and turning the steering lock to lock and get some soapy spray on the air bag and see if it's a leak assist the mostly likely cause

Have checked for leaks. I don’t think the compressor is running I think it’s intermittent for some reason.