kooky_guy
Well-Known Member
But given that it wasn't doing this before the work was done, is it likely to suddenly be the valve block at fault?
It seems to me to be far more likely that the height sensors haven't been calibrated.
This can also be done yourself using the FREE EAS software.
Calibration is easier than rebuilding the valve block. Well, slightly.
Guy
anorakmark
Active Member
Hi Guys
The height sensors were re calibrated yesterday for the second time by Land Rover but problem is still there, compressor running every 15 seconds and front N/S still high. The dancing front seems to have stopped now
The height sensors were re calibrated yesterday for the second time by Land Rover but problem is still there, compressor running every 15 seconds and front N/S still high. The dancing front seems to have stopped now
jdennington
New Member
OK I could be miles off here but has anyone considered that perhaps the new height sensor(s) has a fault that is making one side raise to high?
gmzez
New Member
reading all this I would say its an electronic fault... I.e. the brain giving or recieving duff info... I'm no expert of the EAS system but is there an ECU that controls it? Like a PC can it be rebooted i.e. cut its power and then reboot so it re learns its sensors etc..Maybe discon battery and leave for 1hr then reconnect..sorry if i'm talking daft... good luck...and when its all fixed take them to small claims if its proved they were incompetent etc..
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dogsbody
Very senior member
Sorry if I'm stating the obvious but to 'calibrate' or more accurately set-up the sensors the official Land Rover way means that you put blocks of a certain size between the chassis and the suspension.
Then, when you let the air out of the system, the car settles to that height. You then read the values from the height sensors and put these into the memory of the ECU.
So, when you request that height, or the car automatically goes for a height setting, the ECU looks for the same readings back from the sensor. If the height sensor gives the same reading for the same level every time, as it should, then it cannot go to the wrong height.
If, however, this Land Rover specialist or dealer or whoever simply puts some values from a book, or that have worked before, or uses the same reading as the other side, or whatever into the ECU and your height sensor, for whatever reason is giving a greatly different reading then the suspension will not go to the correct height.
You are saying that the same corner is always too high, regardless of the work being done, so I've got to ask if anyone is actually doing anything or if they know what they're doing.
If you've got the software and don't mind a bit of messing about you can do the job with a tape measure, measuring from the wheel hub to the bodywork, rather than using blocks.
rasheed
Well-Known Member
Does anyone know the dimensions for the blocks?
Also, the problem may be the pressure switch. I would start though with checking ECU connectors and also the little harness connector in the EAS box.
As for going to coils, don't despair yet. With what you've already changed you're well on your way to a near complete overhaul of your EAS. Its likely once you solve this last problem the system will be good for another nice long trouble-free haul! Stay the course, you're nearly there!
Also, the problem may be the pressure switch. I would start though with checking ECU connectors and also the little harness connector in the EAS box.
As for going to coils, don't despair yet. With what you've already changed you're well on your way to a near complete overhaul of your EAS. Its likely once you solve this last problem the system will be good for another nice long trouble-free haul! Stay the course, you're nearly there!
anorakmark
Active Member
Update guys.
Garage phoned me to day and informed me that the valve block seals have been renewed but yes the problem is still there. Front N/S dropping from normal height about 3 inches then the compressor starting. This is still happening every 15 seconds and compressor still over heating. They are now saying that it could be an ECU fault sending wrong info???
They said something about they tried fooling the N/S sensor into thinking when the suspension dropped that it was at the correct height and on doing so it dropped even lower thus the compressor starting. This problem is being caused by the N/S but we all baffeled as to what it is. Anybody know the cost of a new ECU if one is required.
Have to admit garage seem to being resonable about this and helping trying to cure this bloody fault. The saga continues. Had no RR for nearly 3 weeks
Garage phoned me to day and informed me that the valve block seals have been renewed but yes the problem is still there. Front N/S dropping from normal height about 3 inches then the compressor starting. This is still happening every 15 seconds and compressor still over heating. They are now saying that it could be an ECU fault sending wrong info???
They said something about they tried fooling the N/S sensor into thinking when the suspension dropped that it was at the correct height and on doing so it dropped even lower thus the compressor starting. This problem is being caused by the N/S but we all baffeled as to what it is. Anybody know the cost of a new ECU if one is required.
Have to admit garage seem to being resonable about this and helping trying to cure this bloody fault. The saga continues. Had no RR for nearly 3 weeks
You said N/S was too high and they could not get it down, now you say it is dropping. Open a door when it is up if it still drops it has nowt to do with ECU you have a leak.
anorakmark
Active Member
Sorry to confuse, Near side was too high but seems to have been corrected today with new valve seals. But is still dropping, only when engine is running. Car was left over night and height measured, this morning it was at the excact same height.
Perhaps you could ask the garage to explain how leaking valve seals made it go too high. Anyway they will not have changed valve seals only O rings ask them same question about O rings. I have asked this question before and got no answer. What was the car doing BEFORE it went into garage. Was it working correctly apart from worn airbag? Have they checked the linearity of the new sensor? ECU picks up a signal from sensor inflates or deflates until sensor reading matches stored bit count. It is as simple as that. Is it going to correct height then dropping or going too high then dropping? If it rises then stops, then drops 3" then goes up again, either sensor is reading wrong or you have a leak. If all was ok before it went in i can think of no reason ECU or driver pack has gone tits up whilst having an airbag fitted. Stranger things have happened but highly unlikely.
anorakmark
Active Member
Hi Wammers,
Sorry if I have not explained everything this has been stressing me out big time, here is a break down of the saga.
(1) Prior to my RR going to garage for the service & 2 new rear air bags the suspension was fine. There appeared to be no problem on the front and the compressor certainly did not fire up every 15 seconds like it does now. I did have 2 knackered rear air springs, they were bad within 5 minutes of engine off she was on the bump stops.
(2) The car was fully serviced, the big service and the two rear air springs changed. When I collected the car all seemed fine and the garage reported to me that the front N/S air spring was in an extremely poor condition all the cords were showing. The car was re-booked for the following week to have this one changed. The O/S air spring was reported as almost new in excellent condtion.
(3) After the front N/S was fitted the garage called and said they had a problem when they fitted the air bag and it inflated it poped of its mount and kept doing this. They then ordered a new one as this one appeared to be defective. A new one was fitted and then appeared this problem.
(4) When I collected the car I noticed on my journey home that whilst I was stationary in traffic the front kept dropping and the compressor starting to increase the height. I contacted the garage and was advised to return.
(5) Upon return they run all the diagnosis test but nothing was showing, no faults on their system and nothing logged on the EAS ECU.
(6) It was then under the advice of the garage that it may be a defective height sensor so as a precaution they were both changed and the car was taken to another dealer down the road and re-calibrated.
(7) I was then informed by the garage that all was ok and upon collection I observed the following faults. The front N/S was raising to hight and then dropping and the compressor starting every 15 seconds and getting extremely hot. They put the test equipment back on and checked the programmed heights and all were correct as per Land Rover spec.
(8) I was then informed that it could be the o rings in the valve block and these were changed. This cured the problem of the front N/S raising to hight but the sinking problem was still there. The garage then had the EAS re-calibrated again and all was sopt on and no faults logged on the ECU.
They then tried to fool the system by setting the heights at the point where the vehicle was sinking to and on doing so the vehicle inflated to the new set height than started to sink again and then the compressor would start every 15 seconds trying to inflate back to the new set height.
(9) It was then re-calibrated back to the Land Rover spec and the system was charged and height mesaured and left over night. On return in the morning the height was measured and it had not sunk at all. Then the engine was started and she started to sink again on the front and inflate.
(10) I have now been informed by the garage that further test are being carried out and they are foing to swap compressors as an experiment and if need be try another ECU.
(11) I have since contacted Storey Wilson from RSW solutuins USA and he seems to think it could be either the ECU or the driver pack.
I'm sorry to go on but my knowledge is not great of this system I just want it put right it been nearly 3 weeks now.
I hope this may explain things a little clearer.
PS I forget to say they are even going to refit the orginal height sensors, we have so far ruled out their is certainly no leaks in the system.
Sorry if I have not explained everything this has been stressing me out big time, here is a break down of the saga.
(1) Prior to my RR going to garage for the service & 2 new rear air bags the suspension was fine. There appeared to be no problem on the front and the compressor certainly did not fire up every 15 seconds like it does now. I did have 2 knackered rear air springs, they were bad within 5 minutes of engine off she was on the bump stops.
(2) The car was fully serviced, the big service and the two rear air springs changed. When I collected the car all seemed fine and the garage reported to me that the front N/S air spring was in an extremely poor condition all the cords were showing. The car was re-booked for the following week to have this one changed. The O/S air spring was reported as almost new in excellent condtion.
(3) After the front N/S was fitted the garage called and said they had a problem when they fitted the air bag and it inflated it poped of its mount and kept doing this. They then ordered a new one as this one appeared to be defective. A new one was fitted and then appeared this problem.
(4) When I collected the car I noticed on my journey home that whilst I was stationary in traffic the front kept dropping and the compressor starting to increase the height. I contacted the garage and was advised to return.
(5) Upon return they run all the diagnosis test but nothing was showing, no faults on their system and nothing logged on the EAS ECU.
(6) It was then under the advice of the garage that it may be a defective height sensor so as a precaution they were both changed and the car was taken to another dealer down the road and re-calibrated.
(7) I was then informed by the garage that all was ok and upon collection I observed the following faults. The front N/S was raising to hight and then dropping and the compressor starting every 15 seconds and getting extremely hot. They put the test equipment back on and checked the programmed heights and all were correct as per Land Rover spec.
(8) I was then informed that it could be the o rings in the valve block and these were changed. This cured the problem of the front N/S raising to hight but the sinking problem was still there. The garage then had the EAS re-calibrated again and all was sopt on and no faults logged on the ECU.
They then tried to fool the system by setting the heights at the point where the vehicle was sinking to and on doing so the vehicle inflated to the new set height than started to sink again and then the compressor would start every 15 seconds trying to inflate back to the new set height.
(9) It was then re-calibrated back to the Land Rover spec and the system was charged and height mesaured and left over night. On return in the morning the height was measured and it had not sunk at all. Then the engine was started and she started to sink again on the front and inflate.
(10) I have now been informed by the garage that further test are being carried out and they are foing to swap compressors as an experiment and if need be try another ECU.
(11) I have since contacted Storey Wilson from RSW solutuins USA and he seems to think it could be either the ECU or the driver pack.
I'm sorry to go on but my knowledge is not great of this system I just want it put right it been nearly 3 weeks now.
I hope this may explain things a little clearer.
PS I forget to say they are even going to refit the orginal height sensors, we have so far ruled out their is certainly no leaks in the system.
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p38 prius lol
Active Member
hope they fix it
anorakmark
Active Member
Update 17:44 Friday 11/03/11
Now we aere baffeled. Garage just called. Today a replacement Valve block was tried and a replacemet driver pack. Orginal height sensors replaced, new compressor and the fault is still there. Compressor running every 15 seconds, fronr N/S dropping approx 3 to 4 inches.
Land rover techinical coming down to look.
So far. 3 new air springs, 2 new front height sensors, valve block rebuild, new compressor, replacement driver pack?????????????????? It must be ECU. All leak tests done and no leaks!!!!!!!?????????????????????????????????????????????????????????????????
Now we aere baffeled. Garage just called. Today a replacement Valve block was tried and a replacemet driver pack. Orginal height sensors replaced, new compressor and the fault is still there. Compressor running every 15 seconds, fronr N/S dropping approx 3 to 4 inches.
Land rover techinical coming down to look.
So far. 3 new air springs, 2 new front height sensors, valve block rebuild, new compressor, replacement driver pack?????????????????? It must be ECU. All leak tests done and no leaks!!!!!!!?????????????????????????????????????????????????????????????????
kooky_guy
Well-Known Member
But surely it would drop overnight then?
Datatek
Well-Known Member
You would think so, maybe my brain is not in gear
But the compressor must be OK as it comes up quickly then goes down, so either the ECU is commanding it to go down then up again, or there is a loss off pressure that the ECU compensates for. If the height sesors, valve block and driver pack have been eliminated, that would just leave the EAS ECU. I have to say that I'm not entirely convinced that everything has been done properly based on past experience.
