Discovery 2 - Air Suspension Off Road Mode Issue

Dear all,

I've been searching the forums to see if this has come up before, and can't find anything, so apologies if I've missed this somewhere else.

I recently had the suspension compressor die on my D2. It was diagnosed and replaced. The car had been sitting low and wouldn't rise to full height, and pushing on the O/R button on the dash did absolutely nothing - it would just beep for ages, and the car wouldn't rise. The airbags were checked for leaks and found to be good, one had only been replaced about 6 months earlier.

Therefore, new compressor was fitted, along with a replacement relay that went into the fuse box. I was advised that when the compressor dies, the relay usually goes too....

I picked up the car from the garage, and it was up and level, and was advised by the mechanic that the car pumped straight up again after the restart, so all seemed well. The car was level and seems to be at full height.

However, when I got home, I pulled into the driveway and tried the O/R button - nothing happened. It beeped a couple of times and then went off. I know from when it was working normally that what should happen is that the yellow light on the dash should come on and flash/beep continuosly as the rear end is raising, and then stop beeping with the light staying on permanently whilst it holds the full height. Another press of the button, should set it flashing / beeping again as she lowers back down to normal ride height....

With mine, none of this was happening. It was flashing briefly and then nothing. The rear end was certainly not raising. It went back to the garage the next day and back on the computer. The computer reported that there were no historic or active issues with any part of the system. The compressor could be forced on, BUT the computer could not force on the O/R mode. However, as far as the computer could tell - the diag was that the O/R system (button on the dash) was functioning correctly. Therefore, mechanic is stumped.... It's not something that they've seen before.

Does anyone know why the compressor would work, and pump at the suspension to normal ride height, but what would prevent the O/R button on the dash from preventing the car from rising to O/R height?

Any suggestions for diag/repair would be much appreciated, as we're not sure what to test/change next with the computer reporting everything working a-ok!

doors need to be closed

Like the guy says the doors need to be shut, but there has to be sensors on the doors telling the computer the doors are shut so it can alow vehicle to raise.
so could a problem be there
Mark

Thanks for these two suggestions - the door's being closed has already been eliminated as a possible problem. This was done both by physical check (and all five doors were properly closed), as well as the computer linked up to the ECU confirming that as far as the ECU was concerned, all the doors were shut too! This is defo not the cause of the problem.....

Hi there, I did start a thread a few days ago having had the suspension drop on my Discovery. Mine was also a dead compresser, however i found the likely cause for it having expired being that it was full of water. Likewise all the air supply line was full of water, and my filter (behind nearside tail light) was actually a block of ice as it was -2 degrees when I was working on it.
I was asking if anybody else had had water get in through the filter as I'm pretty sure that is what killed the compresser. Obviously I blew all my air lines through to clear any water before fitting the new compresser.
If this wasn't done i wouldn't have thought a new compresser would last too long if it to was taking in the water already in the air supply lines?

My relay was okay however it had blown the 30amp fuse under the bonnet.

All the best with sorting it out.

Best wishes to all for the new year.

Rob

RobSawyer said:

Hi there, I did start a thread a few days ago having had the suspension drop on my Discovery. Mine was also a dead compresser, however i found the likely cause for it having expired being that it was full of water. Likewise all the air supply line was full of water, and my filter (behind nearside tail light) was actually a block of ice as it was -2 degrees when I was working on it.
I was asking if anybody else had had water get in through the filter as I'm pretty sure that is what killed the compresser. Obviously I blew all my air lines through to clear any water before fitting the new compresser.
If this wasn't done i wouldn't have thought a new compresser would last too long if it to was taking in the water already in the air supply lines?

My relay was okay however it had blown the 30amp fuse under the bonnet.

All the best with sorting it out.

Best wishes to all for the new year.

Rob

Click to expand...

This has now been solved!

Someone suggested that I take her into the low-range, and then hit the off-road button. Sure enough, she rose up as she should. I drove around for about 5 mins in low-range/off road mode, and then took her back in hi-range.

I drove off and hit more than 20 mph - the car automatically lowered. Once she had lowered fully, I hit the off-road button again, and low and behold - she started rising again!

No idea why she needed to be in low-range/off-road mode first to get it to work again - but it did!