Member Since: 02 Feb 2009
Location: Northern Ireland
Posts: 127
Suspension issue: Normal Height Only
Hi All, another suspension issue!! When ever i start the car it bongs and throws up a suspension fault. It says "NORMAL HEIGHT ONLY" I have an IID reader and the code is C1A09-1C (AF) Pressure sensor signal -General electrical failure - circuit voltage out of range.
I have a new compressor fitted last year, I have checked compressor power leads and connectors they are ok.
I'm not wanting to spend £70 on a sensor to find its something simple else where, Any ideas?
thanks in advance.
TomRear privacy glass,Updated sat nav,3 flash,Chrome tubes4x4 info,
Beanie grille. Egr blanked, X8R EAS repair kit, DRLs, rear courtesy lights. COD, GG ATs, IID BT,
8th Feb 2019 3:41 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14187
Member Since: 02 Feb 2009
Location: Northern Ireland
Posts: 127
Thanks for the lead. It certainly looks to be in the right direction .Rear privacy glass,Updated sat nav,3 flash,Chrome tubes4x4 info,
Beanie grille. Egr blanked, X8R EAS repair kit, DRLs, rear courtesy lights. COD, GG ATs, IID BT,
17th Feb 2019 9:23 pm
tdv6tom
Member Since: 02 Feb 2009
Location: Northern Ireland
Posts: 127
Hi gstuart.
Just repaired my suspension problem. You were completely right. Yellow wire corroded. Simple cable repair and all sorted. Thank you again.Rear privacy glass,Updated sat nav,3 flash,Chrome tubes4x4 info,
Beanie grille. Egr blanked, X8R EAS repair kit, DRLs, rear courtesy lights. COD, GG ATs, IID BT,
26th Feb 2019 7:43 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14187
Hi
Happy days and always good when a plan comes together
26th Feb 2019 9:59 pm
FidoNick
Member Since: 18 Jan 2021
Location: Purton, Wiltshire
Posts: 132
Hi all, I think I'm hitting a similar problem - at least the error code is the same (C1A09 - pressure sensor signal) and the same 'normal height only' message on t'dash.
The link is great - but (newbie question here)... how do I see and get to the connector in the N/S/F wing? Is it wheel off, hire a small person or somethign easier?
Thanks!
3rd Feb 2022 3:31 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14187
Hi
Indeed u need to remove the plastic inner wheel arch liner and wheel , to gain access to the 3 x connectors, enclosed some pictures for u , ur also have to remove the passenger side headlight as ur see a torx bolt , also remove the wheel arch, put a link as well for some clips as they break easily
with the ign on , u should get 5Vdc on pin 2 of the reservoir connector
Have also enclosed some wiring diagrams for u , also a link for some new plastic inner wheel arch liner fixings , some will undoubtfully break
If u don’t get 5Vdc at the pressure sensor ur need to then pull apart those connectors , checking all the pins and wires , then use some electrical contact spray , with the connectors still apart , ign on , check if u have the 5 Vdc on the upper loom , pin 4 , yellow / black , if u have u know it’s then from the other connector to the pressure sensor
Personally before jacking the disco up, I raise the suspension to off road height , crack the wheel nuts , jack the landy up so u can get an axle stand underneath , lower onto axle stand , then remove wheel nuts and wheel
Member Since: 18 Jan 2021
Location: Purton, Wiltshire
Posts: 132
That is all really good info - thanks so much! And very thorough
4th Feb 2022 9:57 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14187
Ur so welcome and plse let us know how u get on
5th Feb 2022 6:44 am
FidoNick
Member Since: 18 Jan 2021
Location: Purton, Wiltshire
Posts: 132
Well - the car went in for a 'B' service last week (yes - ALL week) and I asked them to investigate. Turns out there was more than one cable which had corroded and fractured further up within the cable sheath, so this has now been rectified.
Although I didn't end up doing the work, it's really nice to know what's going on.
And I now have a new set of belts and a new pump - so I'm feeling slightly less at risk.
I said slightly
14th Feb 2022 3:21 pm
Worms
Member Since: 24 Sep 2023
Location: Highlands
Posts: 417
Resurrecting this thread rather than creating a new one...
On Friday, I my '05 D3 started to give me the "normal height only" message on the dash and the C1A09-1C (AF) Pressure sensor signal - General electrical failure - circuit voltage out of range error.
GAP IID shows that the Pressure sensor supply voltage is 4.95v, which I believe is as it should be.
I've taken the front n/s wheel and liner off to access the wire that is the usual suspect and find that it has been fixed before - with a new blue wire taken off and leading forward before joining the NSF suspension air line and disappearing under the radiator.
What I am struggling with is where does the yellow and black wire normally go? The wiring diagram above suggests that it leads to the pressure sensor on the reservoir, but the replacement blue wire on mine is heading away from the reservoir.
Also, with the GAP Tool identifying 5v supply to the sensor, can I conclude that the wiring to the sensor is OK and therefore I should be looking at the pressure sensor itself?
Click image to enlarge
Click image to enlarge
Previously:
2010 FL2 TD4e GS
‘93 Defender 110 200TDi CSW - still got this, non-runner on SORN.
‘87 Defender 90 4 cyl Petrol
‘83 110 CSW V8 - best ever!
Range Rover 2-door V8 (not sure of year - 4-speed box and vacuum diff switch)
Series III SWB Diesel
3rd Mar 2024 2:35 pm
Mojolandy
Member Since: 06 Jul 2024
Location: Market Harborough
Posts: 3
Hi worms. Did you manage to resolve your issue?
It seems I have the same problem, have similar voltage on the gap tool.
But been in the nsf wheel arch twice and I can't find any evidence of a broken wire, I've pulled all the plugs apart and pulled and wiggled all the wires and I just don't know where to turn next, already replaced the sensor and the compressor....and I'm running out of money 😅
6th Jul 2024 12:46 pm
Worms
Member Since: 24 Sep 2023
Location: Highlands
Posts: 417
Mojo, I've not taken this much further, I'm afraid - still running with the "normal height only" warning. MOT is due in late August, and I'm guessing it would be a fail if I can't resolve this on time. I had been hoping for that mythical "dry warm spell" when it is more pleasant grovelling around under the car in the driveway...
Thanks to other threads on here I now know to follow the wiring through to the other side of the front-to-back chassis rail in search of where my replaced wire re-joins the loom. If I can't find any damage there, my plan would be to install a new wire from just before the NSF connector, round to the pressure sensor.
Have you checked the voltage at the pressure sensor and at the connector? You are doing better than me as I've so far failed to get the connector apart. I'm only getting something like 1.5v at the sensor, so I've clearly got something of an earth leak somewhere along the wiring between the sensor and the module (which I believe is behind the driver's knee-panel).Previously:
2010 FL2 TD4e GS
‘93 Defender 110 200TDi CSW - still got this, non-runner on SORN.
‘87 Defender 90 4 cyl Petrol
‘83 110 CSW V8 - best ever!
Range Rover 2-door V8 (not sure of year - 4-speed box and vacuum diff switch)
Series III SWB Diesel
7th Jul 2024 6:33 am
Mojolandy
Member Since: 06 Jul 2024
Location: Market Harborough
Posts: 3
Lol yes that dry spell 🤣. Well long story short cos I'm an idiot when it stopped working I just assumed my old hitachi pump was done for so I bought an AMK upgrade off ebay, which didn't solve the problem and now the plastic soundproofing/ protective case doesn't fit. Then I paid more attention to the gap tool and replaced the pressure sensor, no difference. Gap tool says I have 4.96v at the sensor but I have yet to successfully get any reading on a multimeter as the probes are too big, I have had the plugs apart in the nsf wheel arch I can't find any broken wires after much pulling and wiggling, I have tried to do continuity tests but again probes are too big, at this point I got fed up, put it back together and moved onto one of the other problems that will fail my MOT also due in August 🤣. Not really sure what to do next, I was hoping you had found a miracle cure
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