Well... The saga continues... I have replaced the center reservoir valve block and I can manually pump up both front and rear, using my IID Tool and I have them up now. We repaired the air leak in the rear and it appears to be holding nicely. I left it raised, slightly over normal ride height and will see if it holds or drops over the next few days.
I can deflate both front and rear manually with my IID tool but when I select deflate all... it does nothing.
Now, as luck would have it, I have this new message. Is this something that can be fixed by simply calibrating ? If so, Im really stumped, because to calibrate, it would appear that the air suspension system should be working ... or do I have more to learn about calibrating ? Maybe there is something else wrong that I have not identified yet ?

Does this mean my AF module has lost it's programming ? Is this why it will not start inflating on it's own ? I now have a red suspension fault light that comes on instead of a yellow one.

 

I found a similar problem over on the Disco3.co.uk board at DISCO3.CO.UK - View topic - [SOLVED] - Suspension Error C1A00-54 , maybe yours is similar, hope it is a bit of help. This is very unusual...

 

I had something similar recently. I was chasing multiple issues and swapped a height sensor that was suspect. I used floor jacks to run the guided calibration routine and it seemed to clear that error msg. It is just calibrating the height sensor voltage to physical height, so it doesnt actually have to use the compressor to move if you already set it with floor jacks

My problem turned out to be a cheap ebay replacement compressor with a DOA pressure relief valve. The Lucky8 HD compressor was well worth money.

 

I can use a floor jack to do the calibrations ? What a great idea !!!
I'll get to that on my next attempt when Im not working.
On the positive side, the rear dropped 1mm over night and the front dropped only 5mm over night. Not bad Id say. May still be a minor leak in the front 1/2, but so slow, I think I can let it go for now until I get the rest worked out.

 

What is this "guided" calibration? Is it different than the one you do using the little worksheet in the manual? Is this new?

 

Not sure where this new guided calibration came from, but I have the new IID Tool BT , ( bluetooth edition ) It is an option on there. Manual or guided,

 

@houm_wa "Guided calibration" is a GAP IIDTool menu item. Automatically puts it in tight-tolerance and a wizard walk though adjusting each corner up/down, click "apply" and it does all the math to set the calibrations. Much easier! Sometimes either it glitches and goes back a screen, or my 13YO assistant is fat-fingering the phone screen.

@Brian Raddick Agreed, but dont let slow leaks linger too long or you will prematurely wear out the compressor.

 

So no extraordinary earth shaking news here today... just an update for everyone that has followed and offered help in various ways which has been very much appreciated.
The beast has stayed aired up and dropped ever so slightly , but what is happening with the controls and operations of the system is still got me baffed.
Since the air is holding, I decided to insure and license the vehicle and take it for a longer drive.
Steps:
Got in and started it up.
Surprised to hear the compressor come on, I sat and listened to it run.
It ran nicely for about 30 - 40 seconds and shut off exhausting a fart of air ( I assume normal operation venting as it should )
No suspension trouble light on at this time, so I proceeded to head out for a drive.
Approximately 1/2 mile away, the yellow trouble light came on I continued to drive and it turned red and I got the message to limit my speed to 30mph. This I ignored because I knew the suspension was up.
a few hundred yards more and the red light went yellow again and I continued to drive. with no issues and the vehicle did not enter crawl mode.
20 mile drive and all was good, except the yellow light was on.
I stopped for gas, went in and paid for my gas , came out started the beast up and no indication of a trouble light was evident.
started to drive again and a similar distance of a approx 1/2 mile, the yellow light came on again.
Then same as before, a few hundred yards later, it turned red with a 30 mph speed warning, but no crawl mode.
Again the red light went out after a few hundred yards and returned to yellow.
When I got home, I put in my IID and it showed the gallery not venting issue again. However, going back to when I originally started out, I heard it vent nicely when the compressor stopped. Now appears to not be venting, Since I heard it vent earlier, I assumed it may be a false alarm , however, the compressor must have in the meanwhile started and not vented or .... I don't know.
I could not over-ride and start the compressor with my IID until we crawled underneath and loosened of the air line and release the pressure and then I again could manually over-ride.
I still have yet to do calibrations and wondering if there is a video somewhere showing me exactly how to do this with the IID tool or if I can use the floor jack and follow the guided calibration in the IID tool. I think calibration is my next step so I know for sure it is not confusing other issues.

Regards,

 

I have still not done the calibration on the suspension, but it is holding / maintaining normal ride height. Driving it daily.
I start the LR3 and there is an initial fart of air, then the compressor starts, runs approx 40 seconds and shuts off and farts again. I start to drive and I get a suspension fault and when I read the codes, I get as below in my screen shot. I am confused. I hear it venting, but I still have these 2 faults.
Any ideas ?

 

I had the top one. Rebuilt the compressor and how it's gone. But now I have other problems... I'd say that while you're getting the pressure release when pumping or raising/lowering you're getting a stuck exhaust solenoid on the compressor and possibly the compressor is caked with desiccant powder.