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SOLVED Fault with Suspension on start up - C1A09
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cornishboy
 


Member Since: 09 Oct 2008
Location: Bristol
Posts: 649

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4
SOLVED Fault with Suspension on start up - C1A09

So been looking for ages now but not seen something similar.....

I had a new AMK compressor in 2011 ( I did alot of miles).

Found that this cut out and therw up a fault early this year....... replaced this one with a new AMK compressor courtesy of Geoff and had 2 months happy driving.

Now............ 'normal height only' but straight from outset on system check at start up.... so the compressor does not run. Checked all fuses including the fused link (60A) and they are all in tact!

I will try and get the codes read but any ideas as this comes on even with engine off before starting?
  
Post #144682022nd Mar 2015 8:48 pm
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cornishboy
 


Member Since: 09 Oct 2008
Location: Bristol
Posts: 649

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

So if you ever get the problem that even with ignition 'on' and you get suspension fault - normal height only just go and check the below.

I went through everything and checked compressor/ leaks etc (I have a new AMK compressor-2nd one) and because of the light on at start up and the compressor did not run it had to be an electrical fault.

So I did all the checks and run a 12V supply direct to the compressor and this worked well. Got the codes read and found C1A09 - pressure sensor signal

Pressure sensor signal voltage out of range
Pressure sensor disconnected
Pressure sensor harness wiring short circuit to ground, short circuit to power or high resistance
Pressure sensor failure
Air suspension control module failure

After a cursory look at the three multi plugs in NSF wheel arch everything looked fine. This was niggling me for ages.....

SOLVED - yes it was those wires in the NSF wheel arch. To be precise the feed to the pressure sensor the yellow and black wire had a tiny hole in it and after a little movement it broke off like this.



As it was broken off too close the the multi plug I just bridged the plug with an extra wire.

All sealed and working fine all due to one little piece of copper wire......

A big thank you to Robbie and Geoff. Thumbs Up Thumbs Up
  
Post #14539145th Apr 2015 2:31 pm
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geoff.
 


Member Since: 24 Jan 2010
Location: West kent
Posts: 8531

England 

glad you found it carey Thumbs Up
  
Post #14539975th Apr 2015 5:55 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20713

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Had exactly the same fault, in exactly the same location, but mine was intermittent when driving and when stationary Thumbs Up
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Post #14540415th Apr 2015 7:10 pm
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Robbie
 


Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

Well done Carey!

Looking at a bigger version of your photo I am wondering if some of those dots are from wire-piercing probes. If so they will need protecting with liquid tape or similar before more corrosion sets in.

Thumbs Up
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Post #14540905th Apr 2015 8:33 pm
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evo8
 


Member Since: 29 Jan 2008
Location: Zalesie
Posts: 289

Slovakia 2013 Discovery 4 3.0 TDV6 S Auto Baltic BlueDiscovery 4

Where exactly are these connectors loocated ? NSF means drivers side (UK) front wheel arch?
 2013 D4 TDV6 S; Baltic Blue; IID Tool BT
2007 D3 TDV6 SE, Auto; club Faultmate MSV2 
 
Post #14541936th Apr 2015 6:39 am
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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

NSF in UK means left hand front ( Viewed sitting in vehicle)
  
Post #14542106th Apr 2015 7:46 am
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cornishboy
 


Member Since: 09 Oct 2008
Location: Bristol
Posts: 649

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Will need to water proof the lot I would guess.....

Thanks Robbie Thumbs Up
  
Post #14542446th Apr 2015 9:23 am
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evo8
 


Member Since: 29 Jan 2008
Location: Zalesie
Posts: 289

Slovakia 2013 Discovery 4 3.0 TDV6 S Auto Baltic BlueDiscovery 4

L319 wrote:
NSF in UK means left hand front ( Viewed sitting in vehicle)


Thumbs Up thanks
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2007 D3 TDV6 SE, Auto; club Faultmate MSV2 
 
Post #14546357th Apr 2015 7:36 am
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Norlandia
 


Member Since: 18 Jun 2020
Location: WENATCHEE
Posts: 4

United States 2006 LR3 4.4 V8 HSE Auto Corris GreyLR3

I'm having a similar issue on my 2006 LR3. Would this also apply to my rig? I've traced the wiring bundle from the pressure sensor and it appears to pop up just in front of the driver side foot rest and go to the Control Suspension Module.
  
Post #228924626th Apr 2022 1:05 am
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Yankee_Rover
 


Member Since: 02 Jun 2021
Location: Seattle
Posts: 183

United States 2008 LR3 4.4 V8 HSE Lux Auto Zermatt SilverLR3

Hi Norlandia, yes. The wiring for the system is the same for LR3 and D3.
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Post #228961328th Apr 2022 10:47 pm
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Norlandia
 


Member Since: 18 Jun 2020
Location: WENATCHEE
Posts: 4

United States 2006 LR3 4.4 V8 HSE Auto Corris GreyLR3

Thumbs Up Thank you
  
Post #228962829th Apr 2022 2:20 am
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Admirable
 


Member Since: 19 Jul 2015
Location: Fife
Posts: 1007

Ukraine 2007 Discovery 3 TDV6 XS Auto Zermatt SilverDiscovery 3

It's a great feeling when you find something like that! Well done Smile
  
Post #228963729th Apr 2022 6:35 am
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Norlandia
 


Member Since: 18 Jun 2020
Location: WENATCHEE
Posts: 4

United States 2006 LR3 4.4 V8 HSE Auto Corris GreyLR3

Problem solved. Same issue with the yellow and black wire but a little different location where the wire comes out of the flexible conduit. So nice to have my suspension back to normal!

Thank you!
  
Post #22899822nd May 2022 4:45 am
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opalfruit
 


Member Since: 28 Sep 2020
Location: NORTHWICH
Posts: 24

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Is this accessed by removing the headlight ot the wheel arch trim? I am having a similar issue
  
Post #22901043rd May 2022 7:18 am
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