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Home > Technical (L322) > RSD - Random Suspension Drop? SOLVED

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Sandyt

Member Since: 07 Nov 2013
Location: Wraysbury Windsor
Posts: 2279

2007 Range Rover Supercharged 4.2 SC V8 Buckingham Blue

Also worth checking the reservoir underneath they do corrode and can leak

2nd Feb 2018 2:50pm

stan
Site Moderator

Member Since: 13 Jul 2010
Location: a moderate moderated moderator moderating moderately in moderation
Posts: 35651

^.......and associated pipework. ... - .- -.

Y. O. L. O.
.

2nd Feb 2018 4:32pm

GGDR

Member Since: 26 Nov 2016
Location: London
Posts: 3552

2011 Range Rover Vogue SE TDV8 Stornoway Grey

I posted this a while back, and it's been mostly behaving. Until yesterday and came out of work to find the rear end sitting on the stops.

Weirdly no error - yesterday.

But I have, over the last few weeks been finding this error come up:

C1A06-1C - Right rear height sensor - circuit voltage out of range

Surely related?

I goggled around a bit, found a connector issue on a D3 forum. https://www.disco3.co.uk/forum/another-air...29841.html

Might have a dig around underneath this weekend.

Will look for corrosion again as earler replies have suggested ( ) and but do we think the random rear drop and the rear height sensor issue are connected?

Thoughts very welcome, thanks chaps.
. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

29th Jun 2018 7:41am

GGDR

Member Since: 26 Nov 2016
Location: London
Posts: 3552

just adding the IID screenshot:

Click image to enlarge

Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

29th Jun 2018 12:47pm

GGDR

Member Since: 26 Nov 2016
Location: London
Posts: 3552

Haven't been under the car yet but found this in the workshop manual:

Quote:
Periodic Re-leveling
When the vehicle is parked, the air suspension control module 'wakes up' two hours after the ignition was last switched off and then once every twenty four hours. The vehicle height is checked and if the vehicle is not level within a pre-set tolerance, small downwards height adjustments may be made automatically.

Might explain the random drop and how the sensor could be the culprit. It doesn't always drop (hence thread title!) but I want to know if it's a slow leak. I went to the car four times yesterday and measured the height and it was stable all day.

But some days like earlier this week, it will be on the bumps. I think the Periodic Re-leveling coupled with a bad sensor/connection fits the symptoms.

Also the code ^ does not say LH or RH which is weird.

. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

30th Jun 2018 8:16am

Joe90

Member Since: 29 Apr 2010
Location: Hampshire
Posts: 6419

Quote:
Also the code ^ does not say LH or RH which is weird.

Your screenshot says "rear right height sensor"....

.
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember

Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

30th Jun 2018 10:35am

GGDR

Member Since: 26 Nov 2016
Location: London
Posts: 3552

Ah Joe - thank you - I must be dyslexic I really didn't see that...
. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

30th Jun 2018 10:37am

GGDR

Member Since: 26 Nov 2016
Location: London
Posts: 3552

Hi Team,

Well I finally got around to pulling my rear right weel off, just to do an initial visual check of the sensor.

Found it pretty much like this - the insulation /conduit kinda falling off, and the cables have been spliced sometime in the past. (sssuming the way it looks in the photo is not normal).

I pulled the connector, which looked ok, no signs of corrosion so I hit it with some Contralube contact protection gel and plugged it back in.

I'll see how it goes over the the next few days, but might have to re-do the joints.

Geez it's a big tricky to reach in there, even with the wheel off. Reaching in, stripping and soldering doesn't look that easy...

Any suggestions on best way to repair this very welcome as always.

Cheers,
Greg
. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

22nd Jul 2018 9:14pm

GraemeS

Member Since: 07 Mar 2015
Location: Wagga area
Posts: 2652

The valve is easily unclipped from its 3 pronged mounts then lowered although you might want to remove the liner for best access. I had mine out a week ago when swapping front and rear valve blocks tracking down the reason for the front lowering overnight.

That split conduit is not original as the wires are bare for the last couple of inches.

22nd Jul 2018 10:16pm

GGDR

Member Since: 26 Nov 2016
Location: London
Posts: 3552

Just a minor update; as above ^^ I re-plugged the connector with some contact get and lashed up the exposed wires and open conduit with electrical tape two weeks ago.

Whilst it's a bit too soon to add 'solved' to the topic header, I've not had one suspension error on the dash (which was getting more frequent) .

These RSD's were getting more frequent too, one or two a week. But no overnight rear end drops last two weeks either. The daytime one at work was a bit embarrassing.

I'll give it a bit longer - touch wood and fingers crossed.

Greg. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

5th Aug 2018 7:46am

nino_nino

Member Since: 29 Mar 2015
Location: pocitelj
Posts: 690

2012 Range Rover Autobiography Black TDV8 Santorini Black

Greg, why not apply same treatment to remaining tree sensors. it won't hurt none.

Nino

5th Aug 2018 8:01am

GGDR

Member Since: 26 Nov 2016
Location: London
Posts: 3552

Definitely Nino, I already did the other side rear. I put this stuff on any connectors I remove, inside or out.

There are others, but I've just used this product for years on boats:

http://www.12voltplanet.co.uk/downloads/PDS-Contralube_770.pdf

. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

5th Aug 2018 8:11am

nino_nino

Member Since: 29 Mar 2015
Location: pocitelj
Posts: 690

I use CorrosionX, first recommended by Haylands.

Nino,

5th Aug 2018 8:47am

Henda

Member Since: 02 Aug 2018
Location: Gateshead
Posts: 282

2006 Range Rover Vogue TDV8 Zambezi Silver

Don't know if this is related but I am new to ffrr and coming from disco to ffrr but a lot of disco owners where getting gremlins in the electrics due to using car washes , the high pressure hoses wetting out and corroding connectors mine only got a blast after off roading , but having said that they are all Landrover and as we know they just do what they want and back Again for no reason . I am a big believer in undersealing and mine will be getting the full treatment once I know how she goes , for me it protects electrics and b/pipes etc from corrosion
Cheers henda

5th Aug 2018 1:39pm

Joe90

Member Since: 29 Apr 2010
Location: Hampshire
Posts: 6419

@henda

That is why you will see quite a few FFRR owners on here only wash their cars once a year .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

5th Aug 2018 4:43pm

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