Jondotnet
Member Since: 24 Dec 2020
Location: North York’s
Posts: 97
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| Air leak - where to start?? |
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As expected, my 2006 D3 appears to have an air leak. It’s not moved for a few days and today it’s looking a lot lower than normal.
Where do you start trying to identify the cause?
The compressor runs and suspension changes height quick enough. The vehicle is level and can’t see anything obvious.
Thanks
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 1st Jan 2021 5:15 pm |
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Kviasen
Member Since: 24 Dec 2020
Location: Norway
Posts: 107
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Raise height to offroad heigt and on a level surface pull 5 amp fuse in engine fuse box to suspension computer.
Let it sit for a day or so and see witch corner is lower and then proceed with further steps.
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| 1st Jan 2021 5:22 pm |
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Jondotnet
Member Since: 24 Dec 2020
Location: North York’s
Posts: 97
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Thanks, fuse pulled and will see what tomorrow brings.
Is there a thread or a wiki entry that goes through air suspension fault finding?
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| 1st Jan 2021 6:03 pm |
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pagoda
Member Since: 13 Aug 2009
Location: Not London Anymore (or the US for that matter)
Posts: 1929
  
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50% 0f this forum's content is dedicated to air suspension, it seems. Pull fuse, see what you get. Then consider relatively easy fixes like rebuilding the front valve block (GBP20 in o rings from fleabay, etc) and go from there. Read faults if you can, etc. PAGODA
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| 1st Jan 2021 6:10 pm |
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Jondotnet
Member Since: 24 Dec 2020
Location: North York’s
Posts: 97
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Pagoda wrote: 50% 0f this forum's content is dedicated to air suspension, it seems.
That’s what I discovered when searching. Very quickly got lost in a lot of rabbit holes.
I am hoping I can get this issue sorted easily. Ended up ripping it all out on my D2 
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| 1st Jan 2021 7:47 pm |
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lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
 
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So long as you have a decent code reader, you can fix the air susp yourself.
Air susp is great, but it goes wrong, on all makes of cars/vans and trucks.
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| 1st Jan 2021 11:37 pm |
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Jondotnet
Member Since: 24 Dec 2020
Location: North York’s
Posts: 97
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I am starting to think an upgrade from my cheapo OBD reader my be in order.
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| 1st Jan 2021 11:51 pm |
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Jondotnet
Member Since: 24 Dec 2020
Location: North York’s
Posts: 97
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Finally got round to doing something with this. I put it in off road height and left it for 48hours.
The result, all four corners dropped. 3 dropped 4cm and the front right dropped 5cm
I was expecting something pointing to an obvious end or corner of the vehicle but not sure what this tells me.
I have a receipt to say the compressor was replaced 7 years ago within what I assume is another hitachi. It is noisey and does run quite a bit which I am assuming is down to the leak I must have.
Any suggestions on next steps?
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| 7th Feb 2021 3:50 pm |
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Twintorque
Member Since: 29 Mar 2012
Location: West coast
Posts: 112
 
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As a minimum strip and clean the front and rear valve blocks looking for white powdery residue, I'd also check the desiccant in the pump and see what it's condition is, Then make sure you are pulling the right fuse to stop it self levelling ( as despite what mentioned above I think its a 20amp (26E possibly?) from memory ) fuse and then see where it drops. ( if it all ) Its really not that complicated a system so don't be put off.
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| 7th Feb 2021 4:01 pm |
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pjm-84
Member Since: 04 Oct 2016
Location: Hampshire
Posts: 2566
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Did the strip and clean both air valve blocks, new o rings etc . But mine still dropped. Have recently changed both the front and rear valve blocks and it no longer drops.
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| 7th Feb 2021 4:31 pm |
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Twintorque
Member Since: 29 Mar 2012
Location: West coast
Posts: 112
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Yep sometimes you just need to replace don't you and good that this has resolved it. I went that route with my air compressor as when I stripped it to overhaul you could just tell it wasn't going to do the job. New compressor, updated the software and it's been perfect.
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| 7th Feb 2021 4:43 pm |
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Jondotnet
Member Since: 24 Dec 2020
Location: North York’s
Posts: 97
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Quick question for anyone regarding compressors. If a hitachi compressor was replaced with another hitachi, would any software update be needed?
I ask because in my pile of receipts is one for a new compressor being fitted followed by another for a trip to the LR dealer for the software to be updated. It just doesn’t say what make of compressor was fitted.
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| 7th Feb 2021 8:23 pm |
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aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2463
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No not if its like for like. Andrew
D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE
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| 7th Feb 2021 8:47 pm |
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Jondotnet
Member Since: 24 Dec 2020
Location: North York’s
Posts: 97
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More investigation required then 
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| 7th Feb 2021 9:07 pm |
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Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1807
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I think the only time a software update is required is when they change from Hitachi to AMK so maybe you now have a AMK compressor.
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| 8th Feb 2021 9:09 am |
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