Disco 2 Airsuspension

Now my ACE is fixed I am trying to tackle the air suspension.

It is on coils at the moment as the previous owner fitted those.
However everything is there, compressor, height sensors and pipes.

Today I switched the SLS on with my nanocom but when I pressed the button with the door closed but my compressor didn't go on. When I test the compressor via the nanocom it does go on. Should air come out of the pipes if I switch the compressor on with the nanocom?

I am a complete noob with air suspension but I would like everything to work before I buy the air suspension bags and put them in.

No air will come out when you test the compressor with nanocom cos it only gives feed to hear it running but the valves are closed, if it's on coils it's possible that it's higher than the SLS level was calibrated and then the compressior will not start cos the height sensor inputs are high from the beginning and the ECU will work to let air out not to pump air in if you see what i mean

sierrafery said:

No air will come out when you test the compressor with nanocom cos it only gives feed to hear it running but the valves are closed, if it's on coils it's possible that it's higher than the SLS level was calibrated and then the compressior will not start cos the height sensor inputs are high from the beginning and the ECU will work to let air out not to pump air in if you see what i mean

Click to expand...

Yep I see what you mean. Anyway of testing the system without the bags on it?

Put some heavy weight in the boot as to see the rear lower than the front then the compressor should kick in when you start the engine if it's set to air... make sure that the misslock warning is enabled cos if it's disabled you can't hear a misslock even if it is then the compressor will not run cos the management gets an open door input , let a door open and lock with fob, if the misslock warning is active you must hear the horn

sierrafery said:

Put some heavy weight in the boot as to see the rear lower than the front then the compressor should kick in when you start the engine if it's set to air... make sure that the misslock warning is enabled cos if it's disabled you can't hear a misslock even if it is then the compressor will not run cos the management gets an open door input , let a door open and lock with fob, if the misslock warning is active you must hear the horn

Click to expand...

That is enabled as our children constantly leave the doors open, so I know for a fact that works. LOL

Did you set it to air in both BCU and SLABS?

Yes, and all lights on dash came on when I pressed the button. They stayed on but no sound from compressor.

Should they stay on?

Tested the height sensors and they are working, ony don't know if they read the correct height though.

The SLS warnings should go out after the self test, if they are on it means there's a fault logged and the compressor will not work, read suspension related fault codes and if you find a "duty cycle exceeded" erased it cos it will not let the compressor work

Cheers Sierraferry, I will play a bit more with my nanocom. Is there a way to test the valve block as they might have removed the airbags due to problems (considering the previous owner went through the length of removing my ACE LED)

You can try to give inflation command with nanocom for each side and see if it comes air through the pipe .... in calibration menu, raise left/right

Helpful as always, thanks Sierraferry.

Hi

For info, of the 3 D2 's I have looked at the height sensors are showing in nanocom " approx 145 to 155 ish " for normal running height. They have never been exactly the same left to right. This gives a height ctr of wheel to wheel arch inside edge within the trarget range of 473mm +- 15mm.

Cheers

neilly said:

Hi

For info, of the 3 D2 's I have looked at the height sensors are showing in nanocom " approx 145 to 155 ish " for normal running height. They have never been exactly the same left to right. This gives a height ctr of wheel to wheel arch inside edge within the trarget range of 473mm +- 15mm.

Cheers

Click to expand...

Thanks Neilly, I saw the height sensors working in the nanocom but can't remember the numbers. I will check though.
All info is well appreciated as this is the first time I ever had air suspension.

I also plan to add two extra valves so I can manually in and deflate the airbags in case the height sensors fail. I saw this done before but don't seem to be able to find it online now.

This is what you are thinking of. I am sure you can buy the bits separately cheaper.

bay of flea number is:

271935006590

Cheers

that is exactly what I meant!!!!!!!!!!

Cheers Neilly

Would that allow me to put the bags in and then get to the bottom of the fault or would it be better to get to the bottom of the fault first?

The thing I see missing with them is that there is no tap/ valve to isolate the bags, in case you had an issue with the pipework / compressor/ valves further up stream from the bags, to keep the bags inflated if needed.

There is a number on one of the ebay ads, i would give them a call. They may have exactly what you want.

Cheers

Brilliant. will look for that and give them a bell