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ACE Valve Unit Failure

Right, the windscreen i had replaced by autoglass through insurance was on 300, the wet footwell is on TD5, and has done this since i got it... i dont know if it is the windscreen seal or the door seal or what!! Also, i'm pretty sure the heated part of windscreen does not work (either side), and was told it might be a bad connection on the windscreen itself.... I have power to the connector under bonnet.. I suppose that the insurance only covers a windscreen if its cracked, not if it just starts leaking!!
 
iansoady said:
It often cracks if a hammer accidentally falls on it.....
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Bet autoglass see quite a few "accident" hammer attacks ;)

Is there any point in replacing the windscreen if the seal isn't replaced?
Is this why landy owners wear wellies...to keep their feet dry :p
Going to buy a rubber duck for my footwell :D
 
Urban Panzer said:
Pressure fault points to the transducer, still cannot see where the temp fault would come from as there is NO temp "circuit" in the system, + that would not happen if you was not driving the car when the light first appeared because the fluid would have been cold.

If it was my car, I would first substitute another ECU to eliminate that, then I would go for the pressure transducer after that.

Not saying I can read anything different, but I have a Nanocom and Im only in luton, your more than welcome to run it over and we could see what that says ref the fault.
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Well even more confusing, been on the road for a few days, had intermittent Amber light, then no light, with the light tending to be off more than on, then this am, had a Red Flashing light with audible warning. Stopped the car, restarted and everything seems to have cleared. So not sure what to think, although never know whatbtonexpect now every time I start her up.

Would welcome taking you up on the offer of having a look at the diagnostics, but am guessing will be no good unless I am in a phase of having one of the warnings on.
 
No diagnostics will give you all the Acceleromter and Pressure real time readings (on the Nancom anyway ) irrespective of faults or not . So a trained eye will be able to see what those reading signify . (failing that just getting them and posting them here will allow all us armchair experts and the gurus who live here too , to have an educated guess )

It will also allow you to calibrate the accelerometers if need be (unlikely) , and Bleed the ACE system too .
 
23skidoo said:
No diagnostics will give you all the Acceleromter and Pressure real time readings (on the Nancom anyway ) irrespective of faults or not . So a trained eye will be able to see what those reading signify . (failing that just getting them and posting them here will allow all us armchair experts and the gurus who live here too , to have an educated guess )

It will also allow you to calibrate the accelerometers if need be (unlikely) , and Bleed the ACE system too .
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Sounds sensible, @Urban Panzer would be great to take you up on your offer of some diagnostics, how do I contact you?
 
Urban Panzer said:
Without having the codes read in the ECU its difficult to say. The write up does explain it could be a "pot shot" for a fix, a definate fault code is better to start with.

An amber light is always a "mild" fault as opposed to red which normally means lots of money. It could simply be an accelerometer has gone down or out of cal possibly, but with out reading the ECU it would be another "pot shot".

If the ACE ecu detects no fault, it should put the light out on its own.

Anyone here close to you that could maybe help ?

http://www.nanocom-locator.co.uk/
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Urban...Got in touch with Andy..I'll hopefully find out on Saturday whats wrong with my ACE..will let you all know the result..
Fixed another thing today..Had a stuck wastegate actuator..bit of WD40, and copper grease sorted it. :)
 
Hi All,

Well had Hawkeye diagnostic today. Cleared various errors, but still got the Amber ACE lit. Andy found a speed sensor error, that we can't clear. Anyone know if this would be related to ACE? He thought it might be a sensor on one of the wheels, but I'm thinking this would put TC or ABS light on? (these are not showing a fault)

Could the speed sensor error reported by Hawkeye be referring to an Accelerometer?
 
greenmonster said:
Hi All,

Well had Hawkeye diagnostic today. Cleared various errors, but still got the Amber ACE lit. Andy found a speed sensor error, that we can't clear. Anyone know if this would be related to ACE? He thought it might be a sensor on one of the wheels, but I'm thinking this would put TC or ABS light on? (these are not showing a fault)

Could the speed sensor error reported by Hawkeye be referring to an Accelerometer?
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The ACE ecu gets 2 speed inputs, 1 from the engine and one from the road speed (slabs ecu). The engine one is basically to tell the ECU the engine / thus pump is running, if thats missing it will throw a light and lock the roll bars.

The road speed signal is for determining if the vehicle is offroad or not for differences in roll control.

It may be a long shot, but might be worth checking the ECU plugs (engine ECM) are connected / clean / not oil contaminated as thats where the engine speed signal comes from.
 
Urban Panzer said:
The ACE ecu gets 2 speed inputs, 1 from the engine and one from the road speed (slabs ecu). The engine one is basically to tell the ECU the engine / thus pump is running, if thats missing it will throw a light and lock the roll bars.

The road speed signal is for determining if the vehicle is offroad or not for differences in roll control.

It may be a long shot, but might be worth checking the ECU plugs (engine ECM) are connected / clean / not oil contaminated as thats where the engine speed signal comes from.
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Thanks Urban. I've disconnected the battery, then pulled the engine ECM out today (the one behind the battery), all cables clean and connected, not sign of oil contamination. Also checked body control unit behind the glovebox today, all cables dry, clean and connected.

Any other ideas? Noticed some water drips from the front sunroof switch panel (even though I've sealed both sunroofs). Will check connection to accelerometer in the roof lining for water.
 
UPDATE 31stJan: Hi all,

Well took the LR to my local specialist. Their diagnostics found no faults on the ACE system, however the ACE light is still amber :(

I've done some research into the ACE system on RAVE and found that SLABS ECU is connected to this, so maybe the warning light is due to a speed sensor? One sign of failure for this though is cruise control..which is still working.

I'm going to check all ACE electrical connections, if anyone has any ideas or diagrams that might help please post. Thanks.
 
Can you got the diagnostics output ? Post it here and we can confirm if readings are "correct" .

Have you tried a different or replaced the ACE ECU .. sometimes they just seem to fail and do what you are seeing .. activate warning light even if there is no fault .
 
23skidoo said:
Can you got the diagnostics output ? Post it here and we can confirm if readings are "correct" .

Have you tried a different or replaced the ACE ECU .. sometimes they just seem to fail and do what you are seeing .. activate warning light even if there is no fault .
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Spoke to the guy at LR specialists. They tell me there was no diagnostic output as "no fault found" is being displayed on their diagnostic computer. I've not tried or replaced the ACE ECU..was meaning to take it out to establish S/n on it. Having done some research on RAVE, I found faults are written to the ECU when you switch off the ignition (power remains for about 30secs). The ECU then reads these faults when you turn the ignition on, so if it finds a fault code the warning light is shown..but as I've no fault codes, could it be the ACE ECU cannot communicate with a component when switching the ignition on causing the light to be lit? Out of the two accelometers the top one reports the faults..so maybe this is faulty or the wiring to it.
Can't throw more money at a ACE ECU only to find its not this. Any thoughts?
 
I would question how specialist they are then . ACE ECU will report all its settings irrespective of faults or not . Trying to reduce diagnostic to whether a computer says there is a fault or not is not going to get you very far .These computer components are simply not that sophisticated in this respect when to be honest they damn well should and could be but that a whole different subject , as it stands in many cases you have to have the knowledge to interpret the information .

Unless you want to speculatively go through the list of things that could be wrong and replace them one by one then getting the output is the only place to start . If they cant get it , find someone else who can . Anyone with a Nanocom or a Hawkeye will be able to do it . Any Garage who specialise in Land Rovers will have either Testbook or Rovacom and that definately will be able to do it .. and a lot more too .

If you have exhausted already all avenues , as I did when I had this issue , the only thing I hadnt tried was that the ECU itself was faulty , and it turned out to be what the problem was !! Are you garage not able to swap over the ECU temporarily to see if that cures it ? Otherwise You can get a used ACE ECU for 40-50 quid and if its not that I would suggest most likely sell it on again on the same basis for the same or thereabouts price (try ebay) .
 
I have a similar problem with my ACE warning lights. Occasionally I get red which clears when I stp and start the engine, quite often I have amber and sometimes there is no light at all. This has been happening for about a week now and I am going to have a chap look who knows a bit more look at it on Sat. There doesn't seem to be any difference in handling whether the light is on or not.

I have also had the leaky windscreen / sunroof problem and wondered if water had got in the accelerometer but I had the windscreen fixed a couple of months ago so doubt it's that, unless the sunroof is still weeping.

In response to earlier queries about the windscreen seal. I had mine done by Autoglass under the insurance. It was £106 to take it out and reseal it but they said it was likely to break the glass in the process and this would be over £500 to replace. I contacted my insurance who said if the glass is broken it's covered. Autoglass then said it's easier for them if they know they are putting a new one back in, especially with the heated screen. This cost me £100 excess so saved £6 and got a new screen.

Does anyone have details of local independent in the Bolton area, I'm struggling to find one.

Thanks.
 
FamilyGuy said:
I have a similar problem with my ACE warning lights. Occasionally I get red which clears when I stp and start the engine, quite often I have amber and sometimes there is no light at all. This has been happening for about a week now and I am going to have a chap look who knows a bit more look at it on Sat. There doesn't seem to be any difference in handling whether the light is on or not.

I have also had the leaky windscreen / sunroof problem and wondered if water had got in the accelerometer but I had the windscreen fixed a couple of months ago so doubt it's that, unless the sunroof is still weeping.


In response to earlier queries about the windscreen seal. I had mine done by Autoglass under the insurance. It was £106 to take it out and reseal it but they said it was likely to break the glass in the process and this would be over £500 to replace. I contacted my insurance who said if the glass is broken it's covered. Autoglass then said it's easier for them if they know they are putting a new one back in, especially with the heated screen. This cost me £100 excess so saved £6 and got a new screen.

Does anyone have details of local independent in the Bolton area, I'm struggling to find one.

Thanks.
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Familyguy - I'm Bolton as well. The Land Rover specialist is A1 Landrovers Bury. Let me know how you get on with the bloke on Sat. No difference in handling would suggest that the ACE system is working, and that the ACE ECU "thinks" theres a fault. As 23skiddoo suggests the ACE ECU could be faulty. I'm going to try and obtain diagnositics for mine then post them on here.

I've come home to mine tonight to find the indicators and central locking stopped working...I have a feeling that its moisture in the fuse box under the dash (looks bone dry) or a bad earth somewhere. Its just one problem after another :(
 
Thanks greenmonster, I had looked at A1 but didn't know anything about them or if there was anybody in Bolton.

I know what you mean about one thing after another! I got stopped by the police yesterday because of the tinted windows on mine. I've also had a few other little problems:

Leaky windscreen
Leaky sunroof
Snapped rear wiper arm
Broken rear step
3 punctures - 1 of which meant a new tyre

All within 6 months of ownership.

I still love it though :)
 
greenmonster said:
I've come home to mine tonight to find the indicators and central locking stopped working...I have a feeling that its moisture in the fuse box under the dash (looks bone dry) or a bad earth somewhere. Its just one problem after another :(
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Well thats a interesting development . There is , for anyone who has trawled these forums for a while , a precedent for fuse box in the engine compartment suffering water or shorting out deterioration leading to all sorts of unexpected results . The fuse box IIRC (not near my TD5 to confirm ) is held in with 2 boilts at either end , maybe someone else here can tell you in the meantime . Undo them and Lift it out a bit and have a look undernear (where this normally occurs) to see if there are any signs of "damage" . If there is that may well be something that is causing your problem.
 
23skidoo said:
Well thats a interesting development . There is , for anyone who has trawled these forums for a while , a precedent for fuse box in the engine compartment suffering water or shorting out deterioration leading to all sorts of unexpected results . The fuse box IIRC (not near my TD5 to confirm ) is held in with 2 boilts at either end , maybe someone else here can tell you in the meantime . Undo them and Lift it out a bit and have a look undernear (where this normally occurs) to see if there are any signs of "damage" . If there is that may well be something that is causing your problem.
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Thanks 23skiddo I'll do that. I've got the one out from under the dash tonight, no signs of water in it. This is my 2nd fuse box though (£200 new) the first one had water damage which blew the central locking in all the doors...£60 a door to fix.
In the space of 6mths of ownership its cost me over £1200 in repairs, which includes a 2nd hand cyclinder head. I've come the conclusion, these vehicles last so long because of all the parts constantly being replaced.:D
 
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