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Dreaded Suspension Fault - Disco 3
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dave955red
 


Member Since: 02 Feb 2010
Location: North Lancs
Posts: 41

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3
Dreaded Suspension Fault - Disco 3

Hi Guys,
Received the suspension fault a couple of weeks ago where the light came on and the fault read unable to lower suspension, clear obstruction. Everytime I restarted the car it would go away.
Its got worst over the time and now the warning is there constantly and says its locked in normal ride height. I can raise the car to full height but then it won't lower and takes a whole day or so before getting back to normal height again.
I presume that the exhaust air from the compressor is being restricted/blocked as the compressor is raising the car, easily.
I've read about the air dryers and dessicant but wouldn't have thought the exhaust air would go through there, I would have thought that was just the intake..
Is there an exhaust valve fitted to the compressor does anyone know or has anyone a drawing of how the hitachi compressor works.
Dave
  
Post #199197815th Oct 2018 3:19 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4581

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

You should begin by having the codes read, otherwise you can end up going around in circles!
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #199198715th Oct 2018 3:41 pm
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dave955red
 


Member Since: 02 Feb 2010
Location: North Lancs
Posts: 41

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

I did get the fault code read. I can t remeber exactly what the code was, something like C1A20, which was where I got the failing to exhaust from that was on the screen
.
  
Post #199199215th Oct 2018 3:59 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4581

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

It might just need the compressor cleaned up (new dryer silicon and filters kit fitted). Or, it might need much more than that like a new reservoir! Either way, if you are going to tackle it yourself you are going to need a code reader to read and clear faults. So working from memory of someone else's code reader is really not the best way to proceed. C1A20 can be caused by more than one fault!
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #199202015th Oct 2018 5:13 pm
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dave955red
 


Member Since: 02 Feb 2010
Location: North Lancs
Posts: 41

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

Code readers not a problem, a friend has got one. My question is more about understanding how the compressor works. Clearly theres no issue getting air into the compressor but simply releasing the pressure from the system. I just wondered if anyone on here had an idea how the system works and where the pressure is released in the system?.
  
Post #199209015th Oct 2018 8:23 pm
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

You need to download a copy of the relevant Workshop Manual. In the meantime, take a look at the Wiki, some great infor on there:

https://www.disco3.co.uk/wiki/Maintenance
  
Post #199209615th Oct 2018 8:44 pm
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Chris x
 


Member Since: 08 Jun 2017
Location: England
Posts: 98

United Kingdom 

I had the same symptoms and it was a knackered compressor.
  
Post #199219616th Oct 2018 11:13 am
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dave955red
 


Member Since: 02 Feb 2010
Location: North Lancs
Posts: 41

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

Thanks Chris.

Its not necassarily the whole compressor. See the attched pics shows theres an exhaust V/V on the compressor.

It could potentially be a simple clean and oil on the v/v, which you can see is attached to the side of the compressor.

Dave
  
Post #199219816th Oct 2018 11:21 am
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dave955red
 


Member Since: 02 Feb 2010
Location: North Lancs
Posts: 41

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

webego wrote:
You need to download a copy of the relevant Workshop Manual. In the meantime, take a look at the Wiki, some great infor on there:

https://www.disco3.co.uk/wiki/Maintenance


Great piece of info, really helpful. Thanks
  
Post #199235616th Oct 2018 10:03 pm
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dave955red
 


Member Since: 02 Feb 2010
Location: North Lancs
Posts: 41

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

Guys

Found this link. This company in Warrington do the kits but they also refurb the Hitachi Compressors.

Has anyone used them or know of them.
  
Post #199284018th Oct 2018 11:24 am
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