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Return of the suspension fault (after various new parts)
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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
Return of the suspension fault (after various new parts)

So recently installed my second AMK along with a new reservoir tank, reservoir valve and front valve. All has been good since including a long drive from SE England to the Lake District for a week and back home. Had another two weeks since at home also problem free.

Then today I had the Off Road setting as was about to do some work (diff oil replacement) when I realised I had the wrong tool so jumped into the car to catch Halfords. 20 seconds later I get a bong saying "Slow down or suspension will lower". Doh! Realised I was still on the Off Road setting so flicked to go back to normal height. Then 20 seconds later ... bong again, Suspension Fault - Normal Height Only. Can't Censored believe it!!!

I haven't looked at it yet to be honest (other than read the fault on the IID), too Censored off.

I have two faults, the second of which I definitely had before thus changing all the above parts. Any thoughts on what else it can be? Could I have created a new problem by driving on Off Road height for such a short time?

Please help, I am loosing faith in my Disco. I enjoy working on it but this recurring suspension issue is going to be the end of me.
  
Post #198387116th Sep 2018 3:55 pm
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Narpy
 


Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830

2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

You need to post the codes otherwise it's total guess work.
 Mods:
Front Fogs + Halos
FBH Remote Control
The 1st Ever RRS Modded Grill
Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
Wing Mirror Indicator Repeaters.
Long Roof Rails
Make your own Narpy grill thread
I'm not scared, I'm outta here. 
 
Post #198387516th Sep 2018 4:13 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

Yes, sorry just realised that. In the process of trying to get the photo uploaded, but just having one of those days.
 

Last edited by webego on 16th Sep 2018 4:37 pm. Edited 1 time in total 
Post #198387616th Sep 2018 4:17 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

  
Post #198388216th Sep 2018 4:36 pm
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Narpy
 


Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830

2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

What state is your reservoir in?
That second fault code implies it might be kaput if you've already replaced the compressor.
 Mods:
Front Fogs + Halos
FBH Remote Control
The 1st Ever RRS Modded Grill
Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
Wing Mirror Indicator Repeaters.
Long Roof Rails
Make your own Narpy grill thread
I'm not scared, I'm outta here. 
 
Post #198388716th Sep 2018 4:55 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

Just replaced that too (before the new compressor) along with new reservoir valve and front valve.
  
Post #198388916th Sep 2018 4:59 pm
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L319
 


Member Since: 14 Dec 2013
Location: Herefordshire
Posts: 2079

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

I wonder if a wire damaged when changing compressor & second fault triggered by the first.
  
Post #198390216th Sep 2018 6:00 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

Could be. But odd that it's taken over 3 weeks to show up (1 of those all over the Lakes). The more I think about it the more I believe it must have been triggered by driving in Off Road albeit for a very short time. Too coincidental not to be related. I just don't know how or why it is related.
  
Post #198390316th Sep 2018 6:07 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4577

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

L319 wrote:
I wonder if a wire damaged when changing compressor & second fault triggered by the first.


Agreed, check wiring!
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #198391116th Sep 2018 7:29 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

L319 wrote:
I wonder if a wire damaged when changing compressor & second fault triggered by the first.


Sorry, yes. Just re-read that. Forgetting I haven't had the first fault before. Just recognised the second and thought ... oh no, here we go again.

I have been working under the car recently so I have been on Off Road with F26 pulled out each time. If that fuse was shot, could that cause this first fault?
  
Post #198391616th Sep 2018 7:52 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

Just nipped and checked F26. Looks okay and was/is seated correctly. Also tried a couple of times to get up to Off Road height before the fault came up. Each time the compressor was working as the back came up but the front didn't move at all. Previously, before I replaced the compressor, I would get the "Front raising too slowly" but this doesn't appear to move at all. Again not sure how that information would relate to the first fault.
  
Post #198392016th Sep 2018 8:06 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

I don't know if the compressor could still partially work if one of the suspension related fuses was blown but as that first fault suggests the possibility of an 'open circuit', I have ordered a bunch of fuses. So tomorrow I will swap out F3, F26, F35 and FL10. Got to be worth a try. If I still have the fault after that, I'll get under and open the compressor case again to check connections etc.
  
Post #198395016th Sep 2018 9:57 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

Replaced all related fuses. Now getting:

  
Post #198413617th Sep 2018 6:17 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

Also just whipped the compressor cover off to have a quick check. Disconnected and reconnected all plugs, visually checked all wires and visually checked all pipes and connections for anything obvious. All looked good. Started up with the cover off and ran around to hear the compressor running for approx 15 seconds or so then stop (at the point the fault shows up again).

Not sure how/why a fuse was blown although looking at all the ones I took out (F3, F26, FL10 & F35) none look broken. But somehow swapping them out has changed the first fault to the above.

As mentioned above the reservoir tank, reservoir valve, front valve and compressor are all new.

I also noticed now then when I try to raise the suspension to normal height (now dropped a little below normal) before the fault comes up, nothing happens at all, front or back.

Not sure where to go from here. Could it be the new reservoir block is faulty and the solenoids aren't working? Or if it is the wiring, how do I go about checking it?

Feeling like it is getting beyond my own abilities now.
  
Post #198415217th Sep 2018 6:57 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4577

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

Did you replace the comp relay when fitting the new compressor? If so try swapping it for another same rated relay in the fuse box and see if diagnostics changes
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #198415617th Sep 2018 7:09 pm
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