Rear Suspension Discovery TD5 2002
Discussion
Hi Guys,
Old man has a problem with his 2002 TD5 Discovery.. he lives in france and doesnt have enough technical vocab in french to properly chat to the technicians at landrover in france.
The rear suspension drops with no apparent warning. It comes back up if it is left off for an hour/overnight, however there is no pattern to it.
It has just happened again whilst he was driving it, and had to drive home at 2mph!
It has been into a main dealer in france, and they cannot find anything wrong with it, even after keeping it for a week and trying to replicate the fault. Old man reckons its the Rear Suspension ECU? (under the dash?) It is deffinitally not the Air Bags as it does inflate.
I have just rang a LR dealer in Derby and asked for the Rear Sus ECU, the technician has told me its actually the compressor - part number: RQG100041.
Has anyone else had any similar issues? if so what was the cause?
any help appreciated, sorry for the long winded post!
Regards,
Rhys
Old man has a problem with his 2002 TD5 Discovery.. he lives in france and doesnt have enough technical vocab in french to properly chat to the technicians at landrover in france.
The rear suspension drops with no apparent warning. It comes back up if it is left off for an hour/overnight, however there is no pattern to it.
It has just happened again whilst he was driving it, and had to drive home at 2mph!
It has been into a main dealer in france, and they cannot find anything wrong with it, even after keeping it for a week and trying to replicate the fault. Old man reckons its the Rear Suspension ECU? (under the dash?) It is deffinitally not the Air Bags as it does inflate.
I have just rang a LR dealer in Derby and asked for the Rear Sus ECU, the technician has told me its actually the compressor - part number: RQG100041.
Has anyone else had any similar issues? if so what was the cause?
any help appreciated, sorry for the long winded post!
Regards,
Rhys
BLUETHUNDER said:
It points to a compressor or valve block failure.
compressor? it does stay up for days/weeks but it just suddenly drops sometimes. He doesnt think its the airbags, and landrover france have found no fault codes on the SLABS ECU (self leveling/antilock braking system) so could it be the SLABS ECU?I've heard its quite a common fault (rear sus dropping), but cant seem to find much info on it!
so its either: Compressor, Air Bags (which will ruin the compressor if left with leak) or the SLABS ECU?
how can this be narrowed down?
If the bags are staying inflated for a few days you can rule them out.
That leaves the ecu or compressor. One of those is a mechanical part which has bits inside it that wear out, the other should be fine for years unless you've put some huge amount of volts up it's bum or got it wet.
Of the two, my money would be on the compressor.
That leaves the ecu or compressor. One of those is a mechanical part which has bits inside it that wear out, the other should be fine for years unless you've put some huge amount of volts up it's bum or got it wet.
Of the two, my money would be on the compressor.
rhys27 said:
BLUETHUNDER said:
It points to a compressor or valve block failure.
compressor? it does stay up for days/weeks but it just suddenly drops sometimes. He doesnt think its the airbags, and landrover france have found no fault codes on the SLABS ECU (self leveling/antilock braking system) so could it be the SLABS ECU?I've heard its quite a common fault (rear sus dropping), but cant seem to find much info on it!
so its either: Compressor, Air Bags (which will ruin the compressor if left with leak) or the SLABS ECU?
how can this be narrowed down?
Edited by BLUETHUNDER on Wednesday 5th March 18:40
Mine used to do that, either one or both sides would go down, it looked hideous but it would rise upon starting. Guy Salmon could find nothing wrong with it, they tested the air bags, but said they weren't leaking. Eventually after a lot of moaning and taking a photo of it down, (Sods law it never happened when I took it in to be checked)they replaced the air bag things and I have had no problems with it since. 
It is common on the DII for this to happen. I have a mate who's often does this too. New airbags can do the trick but didn't on hers. The problme can be bits of grit on the wrong places, round the seals on the end of the air bag, inside the valves on the control box, stuff like that.
Unfortuanatley the system is not as freindly as the EAS used on the classic RR, it can't be interogated by Rovacom as easily for one thing.
I might be right in thinking that you can disconnect the ECU and using a jump-lead you can then operate the valves and compressor manually, if so you can then leave it inflated for a few days and see if anything happens.
Unfortuanatley the system is not as freindly as the EAS used on the classic RR, it can't be interogated by Rovacom as easily for one thing.
I might be right in thinking that you can disconnect the ECU and using a jump-lead you can then operate the valves and compressor manually, if so you can then leave it inflated for a few days and see if anything happens.
A single sensor out of range or a lack of speed signal makes the RRC default to standard height. 2 sensors out of range will cause it to deflate to the bump stops.
But the DII system is a little different, firstly there is only one "normal" height setting, if one height sensor is faulty then the system defaults to that setting, using the other sensor. Also the sensors were redesigned from the variable resistors used on RRC to a non-contact hall effect type system, supposedly much more reliable.
But the DII system is a little different, firstly there is only one "normal" height setting, if one height sensor is faulty then the system defaults to that setting, using the other sensor. Also the sensors were redesigned from the variable resistors used on RRC to a non-contact hall effect type system, supposedly much more reliable.
The first thing he changed was the RHS (ride height sensor) which didnt do anything.
He's got fed up with it, and taken it into landrover dealer, who have finally decided (they had it for a week prior to this) that the airbags need replacing.
Will see what happens!
thanks for all the input/ideas guys! appreciated!
Rhys
Gassing Station | Land Rover | Top of Page | What's New | My Stuff