Hello everyone,

I am experiencing very peculiar suspension behaviour on my 2005 facelift Range Rover Vogue. It initially started when it wouldn't even go a mile down the road without the *suspension fault 30mph max speed* and the suspension system Lowering the vehicle to the bump stops (not pleasent)

It went in to my local Land Rover specialist where they diagnosed a rear ride height sensor out of range, I ordered a genuine part in order to rectify the problem, I did the correct battery disconnect procedure while it was being changed, and all was well for a good 15-20miles, until I came onto a straight piece of motorway at 60/70mph the suspension decided to drop again, I switched the ignition off to reset the system, and tried it again on the same stretch of road to check if it had something to do with the long straight road at high speed and *bing bing* it drops again with the same dash fault warning. The vehicle was then fine on the way home (5miles) on slower twisty roads.

Really not sure what else I can do now, I had reset the steering angle sensor after battery was reconnected, the suspension goes up and down perfectly, no leaks or dropping overnighy, only issue I can see is that all 4 corners measure a lot differently and 4x4 info screen shows a slight variation (all four wheels not quite level) when on the flat, would a recalibration sort this and cause the fault?

Thanks for reading and all help is appreciated!

Thanks
WoddyRR[/list]

Sounds like a re calibration could be in order, I think it's recommended when changing a height sensor.

Have you checked to see if any other codes are showing for the EAS?

When you say on the motorway, I expect that's when it was about to lower into the motorway cruising mode, and could have realised one sensor was out of range (could even be dirt on the track etc.) and decided to throw you down.

Although I was under the impression of that happens it sticks at normal height, I'm sure someone more intelligent will be along shortly  

Sounds to me like you have another sensor out, probably due to the dropping to the stops when the first one went, when old they don't like going outside their normal range....

If your going to keep the car then get an IID tool or similar and then you can easily tell what is doing what... a lot of garages will only look for one fault and fix it, means they make more money as you have to go back...

They should also have calibrated the heights correctly when they changed the sensor, there is a + or - 9mm on the height so you could be upto 18mm out but that is unusual, normally within 10mm of each other.... (side to side, not front to back)

P.S. There are other things it could be as well but you can't tell without reading faults and studying the live data... Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Hi,

Thanks you very much for the reply. That makes sense I forgot the vehicle lowers when cruising on the motorway.

They said there was no other faults, maybe another ride height sensor is faulty or a recalibration might sort things out, they do spit there dummy out over the slightest thing.

Other suggestions welcome

Thanks
WoddyRR

Last edited by WoddyRR on 28th Jun 2016 8:28am. Edited 1 time in total

Thanks Haylands,

They did advise replacing both rear sensors but they said it was the rear right that was the culprit. Maybe worth replacing the other rear and see how it goes?

I replaced the sensor myself so it has not yet been in for calibration, I was led to believe it was possible to get away with this with the battery disconnected.

Although the ride heights are all different the 4x4 info screen shows that all 4 wheels are not perfectly straight (sensor info) I will try and upload a picture now

Thanks once again
WoddyRR

4x4 info on flat ground, the orange blocks are not perfectly straight.

Not much point changing another sensor without finding out which one is giving trouble, the garages "change them in pairs" does not apply to these, they are not an item that needs changing in pairs, they are just a very cheap hall effect sensor put in a box with JLR on it and sold for a ridiculous amount...

If you get a diagnostic tool and bring up the live values you can see if one of the others is erratic.... and when it drops you can study the live values and hopefully find where the problem is...

Buying bit's because they "might" be broken is a waste of money  Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

WoddyRR wrote:

4x4 info on flat ground, the orange blocks are not perfectly straight.

Thanks both, yes I should really invest in a diagnostics tool, I like the sound of the AllComs system, but at the moment I need this sorted asap and the tool from the States to the UK is time for me. It went back in today, and they say the other rear left height sensor was -30 out of range. So I replaced that, and still the same, the guys say it will be recalibrated and then something to do with some software/coding update (the adviser wasn't a 100% sure) as I have had the 3 pin sensors on the rear which superseed from my original 6 pin sensors. I'm not convinced that what they are saying will rectify the problem. I'm loosing faith a little bit.

There must be something else they are overlooking, as the suspension operates perfectly.

Thanks
WoddyRR

Are all the heights on roughly the same level on the 4x4 display when at access height?

Yes roughly, but not all perfectly the same?

Thanks

I wondered if one or more sensor signals became erratic when away from normal height but obviously not.

Which would indicate a faulty height sensor? They all seem OK, there really must be something else that's shutting the EAS system down I just wish the local specialist would do a thorough diagnostic check.

Cheers

Whilst not the same air suspension system, the D4 WSM states that lowering to the bump-stops will occur for "Failure of multiple height sensors, cross-articulation when driving, calibration corrupted". I wonder if the motorway calibrations have been corrupted.

The WSM for early L322s states that motorway height may be deselected at any speed by turning the rotary control switch upwards then pressing hold. However it implies that motorway height has already occurred rather than being able to prevent motorway height. It would be good to be able to test if the lowering only occurs for motorway height but you may have to have the system recalibrated to prove the possibility of those heights being corrupted. Perhaps driving just below the threshold is all you can do to give confidence to the theory.

Edit: It's possible that the average height logic is more pedantic once motorway speed is attained and the across axle discrepancy is then considered a cross-articulation fault, in which case a calibration would be required anyway.