Welcome to Xdrivers
Please login or register.

Author Topic: Rear air suspension issues  (Read 423 times)

0 Members and 1 Guest are viewing this topic.

May 29, 2018, 08:36:37 AM

Liamkel

  • Newbie
  • *
  • Posts: 8
  • Country: gb
    • View Profile
Rear air suspension issues
« on: May 29, 2018, 08:36:37 AM »
I've searched the forum and the Internet and can't seem to find a definitive answer to cover my problem. Last week my rear suspension dropped on both sides and wouldn't rises, then a couple of days later it would rise (I presumed airbags) but now it won't rise at all and it's been a few days now. I had a look at the air bags yesterday but with there being no air in them I struggled to check for leaks, I also stripped the under casing off and got to the compressor, no cable damage to the air feeds on either end but the compressor isn't doing anything. I started the car and it doesn't make a sound or vibrate or anything, it just shudders with the cars general engine vibrations. Should the compressor be making a noise?? I'm a relative newbie to mechanics, I have no problem in changing the air bags or compressor myself but don't know the indepth mechanics knowledge of what these working parts should be acting like. It seems to me maybe the airbags have gone and now the compressor has packed in as a result but don't want to jump the gun on buying and fitting a new compressor if you guys think there could be another possible answer. I've seen talk of the valve block which would make sense with both sides dropping at the same time, but i'm unsure. Any help will be appreciated so I can get any jobs done this weekend.

The cars a 58 plate, E70. Just hit 100k

Cheers
 

May 29, 2018, 09:46:00 AM
Reply #1

X5Sport

  • Lifer
  • *****
  • Posts: 15632
  • Country: england
  • Location: Planet X6......
  • Gender: Male
  • Über Geek in Chief
    • View Profile
Re: Rear air suspension issues
« Reply #1 on: May 29, 2018, 09:46:00 AM »
Check the compressor fuse is intact.  It could be as simple as that.  I can’t tell you the number for certain as I don’t have a fuse card for an E70 and my X6 doesn’t have air either.

If the compressor isn’t running and the air bags are empty that points towards that being at the centre of what is wrong.

This might help:  Fuse Card piccie.  It looks like fuses 37, 107 & 123 Based on the symbols
:type:

May 29, 2018, 10:04:31 AM
Reply #2

Liamkel

  • Newbie
  • *
  • Posts: 8
  • Country: gb
    • View Profile
Re: Rear air suspension issues
« Reply #2 on: May 29, 2018, 10:04:31 AM »
I checked the fuses, there all in tact. I checked both fuse boxes and all good. Wonder if that means it's not the compressor?

Thanks for the reply

May 29, 2018, 10:30:14 AM
Reply #3

Alan Gunn

  • Member
  • ****
  • Posts: 526
  • Country: wales
  • Location: Anglesey North Wales
  • Gender: Male
    • View Profile
Re: Rear air suspension issues
« Reply #3 on: May 29, 2018, 10:30:14 AM »
Check the leveling sensors as well.
Pull the plugs of and spray some contact cleaner in then put them back on then off again to clean the contacts up.
Get a multi-meter and test for voltage to the pump as that could have faild in fact that might be the easiest to do so do that first.

May 29, 2018, 11:25:33 AM
Reply #4

Liamkel

  • Newbie
  • *
  • Posts: 8
  • Country: gb
    • View Profile
Re: Rear air suspension issues
« Reply #4 on: May 29, 2018, 11:25:33 AM »
I remember seeing the leveling sensor yesterday when I was poking around but didn't have a good look so i'll get some contact cleaner on them tommorrow. I'll also pick a volt meter up and check that, how do I test the voltage? And what should I be looking for.

Cheers

May 31, 2018, 05:54:30 PM
Reply #5

Liamkel

  • Newbie
  • *
  • Posts: 8
  • Country: gb
    • View Profile
Re: Rear air suspension issues
« Reply #5 on: May 31, 2018, 05:54:30 PM »
Got the multimeter on the solenoid going into the compressor, I got a reading of 1.55 volts. Is this normal? The batteries reading 14 volts

June 01, 2018, 12:20:14 PM
Reply #6

Alan Gunn

  • Member
  • ****
  • Posts: 526
  • Country: wales
  • Location: Anglesey North Wales
  • Gender: Male
    • View Profile
Re: Rear air suspension issues
« Reply #6 on: June 01, 2018, 12:20:14 PM »
I would have thought it would be a lot higher but not sure with the can-bus system.
Somebody will have the correct answer soon i think.

June 18, 2018, 04:27:56 AM
Reply #7

Liamkel

  • Newbie
  • *
  • Posts: 8
  • Country: gb
    • View Profile
Re: Rear air suspension issues
« Reply #7 on: June 18, 2018, 04:27:56 AM »
Turns out my compressor had gone, got a new one on and the bags lifted and held. Compressor was £350 Inc vat for a OEM, plus 2 hours labour for the diagnosis and repair. The mechanics my neighbour and he spent alot of time on it trying to repair the compressor without having to replace it but had no luck, unfortunately for me. The compressor already on it was also a replacement, but not a OEM part.