Disco 3 (LR3) Suspension fault. Compressor not running

Hi.

This is my first post here.

So, I have a 2005 Disco 3 diesel. Got fitted a new compressor two years ago.

Yesterday I was driving on a very coarse gravel road with potholes and rocks. First i got the message: "special programs off" on the dash and the switch for selecting the height stopped working and the indicator light went off.

Then the yellow "suspension fault" message came on.

I got the car back home but the compressor had stopped working and the car sank down more than ever before.

I plugged in the icarsoft device and erased all the codes, hoping for a miracle. But, the compressor is still dead, the car is super low and the yellow suspension fault light is still there.

Plugged in the icarsoft device again and the C1A20 code, pressure increases to slow, is still there.
I checked all the fuses, they are good.

Thankful for any advice.

Welcome to the fun.

If the compressor is only a few years old, I would suspect a leak somewhere as you have said it has dropped.

Time to get under it with the fairy liquid/Water mix and squirt it all.

I had the same code but also an over temp on compressor but the car stayed up, it was a knackered compressor.

Seems strange compressor wouldnt run after clearing codes, Is the relay ok?

File attached is for the L322 but they do seem to be the same.

J

Thanks marjon.

I will get under it and get dirty, but my knowledge is limited, how do i detect a leak if there is no air in the system
and the compressor does not start?
Also, how do i know if the relay is ok or not?
Sorry for my amateur questions, I can probably search the internet for answers..

I can add that i also punctured a tire during this ill-fated trip. The car got some beating, so I fear that I have wrecked something.

thanks

Yes you really need to at least try to get the compressor to run first. You could bridge the relay to see if it will run (for testing only) But as I have seen a well versed D3 member on I will call him, as I know he did a lot of work on his system @gstuart your help is required.

J

Update.

So the car has been sitting for more than two weeks.
Today I started it, and voila, the compressor runs again!
I get the message "filling to slow" or something like that, but it eventually filled it all up.
However, the compressor comes on and off.

So, I suspect a leak.

Is there a good write-up for detecting leaks in the suspension system?

Thanks.

A liberal application of soapy water on all the air lines is a good way to tell if any are leaking.
However don't assume the air accumulator is air tight, as they generally rust though before the plastic line seals give issues.

@huntergaterer Plus 1 ^^^^^

if u can’t find any leaks , put the disco into normal ride height , then measure from the centre of the wheels to the bottom of the wheel arch , then in the engine bay pull the fuse F26 , leave overnight and see if it drops, remeasure all the wheels and see if they match the first measurements u took

by doing this is can sometimes help identify where the leak is, particularly if just one corner drops etc

plus here’s some manuals for u which goes into more detail of how the suspension works etc

https://media.disco3.co.uk/gallery/albums/userpics/15405/Land Rover factory D3 air suspension description.pdf

when u open this link, just press download

https://onedrive.live.com/?authkey=!AMrvOm7c4l3jJkg&cid=4BC2D89C85C7C171&id=4BC2D89C85C7C171!2116&parId=4BC2D89C85C7C171!1330&o=OneUp

hope that also helps , plse let us know how u get on as many of us have rebuilt these suspension systems so plenty of us to help