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Help with pneumatic height control system??
Posted 23 December 2003 - 08:04 PM
Anyone familiar with this system? Ours stopped working today. The filter has been cleaned out and the pump seems to be working but nothing happens. My husband hooked up an air compressor to the system to see if it was the pump not working, but that did nothing either.
Any ideas would be helpful. We have someone interested in looking at the car to buy it, but now this happens today! We were looking forward to the extra cash before xmas.
Posted 23 December 2003 - 08:09 PM
Posted 23 December 2003 - 08:26 PM
He said he cleaned a filter and that fixed the problem before, but now its back to the same problem and he has no idea what else to look for as the cause.
Posted 24 December 2003 - 09:44 AM
here is the info I offered from what I lad learned from other members and a FSM over the years....
and the search list too for ya....
and the other forum :
of course the search engine there is also good for the help too and you don't need to be a member to search from what I saw.
cheers, happy holidays and best of luck.....
Posted 24 December 2003 - 11:22 AM
E. Monk has some good links for you and I have done some extensive work on the air suspension system.
Please ask your hubby to describe what the system is not doing.
Are all shocks deflated? Is one end higher than the other?
Do you ever hear the compressor running? Is the "height" button light flashing?
If he would like, he can email me (click the "email" button below my post).
I have the FSM (Factory Service Manual) covering the system and rather than asking some question that has nothing to do with your problem, I could possibly lead him on the path to repair.
Posted 24 December 2003 - 02:02 PM
The back end went flat to the ground after we went through a brushless car wash yesterday. Thats when I posted the question. However later that night after we drove it a few miles and came home, it popped right back up. We didnt put 2 and 2 together about the car wash being a possible factor in it until late last nite. is that possible that water being sprayed at high pressure under the wheel wells, etc causing problems with the system?
The compressor runs like its working correctly, and no...the height control was not flashing, thats why it seemed so strange. However over the past couple weeks the height control has been flashing from time to time, but the system seemed to be working fine at the time, we we werent sure why it was flashing either.
It rains alot here in washington and if its water related this may get really annoying....so we would really like to find a solution.
I will email you also. Thanks!
Posted 24 December 2003 - 07:41 PM
IF your "REAR" is a deflation related to water then there is two possible culprits.
1.) the O-ring around the solioid that is bolted(2, 10mm bolts) directly to the rear strut with a silicon grease its subaru part # is 21069GA070 the dealership here in Lewisville charged $6.80 for a single O-ring
2.) the airline which connects to the other side of the solenoid is a plastic tube with a rubber O-ring that is "part of" the hose so my suggestion with it is to softy move/ bend slightly the four clear plastic tongs and pull out the hose and clean out the tube and clean off the hose.
As for the rein stallin gof the tube into the connector I once one one wagon tried to see if a clear or blue silicon sealant in a very thin film over the tiny O-ring then push the tube back into the solenoid. Then as it says to let the sealant skinup and dry do that so... let the car sit overnight if possible and then air it up after the silicon has cured.
I had great sucess with this "temp fix" that admittedly is still holding some 2 years later as I am just remembering that I had done this back them (shrugging grin)
as for the fronts the "O-ring" is in an entirely different place (in the top of the sturt tower).
keep Skipper and I accessible he has a couple more years experience then I of course. (wink)
BTW have a Merry holiday season as well and of course be safe.....
Posted 21 January 2004 - 11:36 AM
Sometimes I have the rear (both) pumped up all the way and the front normal or low….sometimes one (usually a front) will be low and all others normal. Because the trouble has been intermittent and not the same each time I have been thinking that the computer is flaky BUT last week the whole thing went flat and has stayed that way. The compressor is not coming on. I have been looking on USMB and XT6.net and have found some info but have also found a couple of questions I hope you cab answer:
The height light will always start flashing….usually after 10-15 mins running.
Are their 2 fuses in this system…the one in the fuse box is good.
Where is the compressor relay? There is a relay by the FL strut solenoid, is that it?
Any help will be greatly appreciated.
Posted 21 January 2004 - 02:25 PM
From everything I have read about others having trouble with this system is the end result is taking out the air system and putting in a regular one. They seem to always eventually have problems and pricing replacements was an eye opening experience
But if you have the time, patience and money...I hope you are able figure out what the problem is.
Posted 21 January 2004 - 03:46 PM
Posted 21 January 2004 - 05:13 PM
Let me know if interested I can email you pics of what we have. pm me with your email address.
EDIT - Well I tried to post the link but it isnt showing up correctly when I go to the post. We have all the parts except the silinoids available.
Posted 21 January 2004 - 05:19 PM
The pneumatic system is really problematic from what I've learned.
Posted 23 January 2004 - 04:12 PM
Does any one have the color code or the pinout for the computer? It would make the job go a lot quicker if I dont have to figure out which wire does what.
I will post a schematic and picts when I'm done.
Posted 23 January 2004 - 04:23 PM
Sounds like a kewl sysytem, you might want to incorporate some LEDs for the height switches in the shocks so you don't over inflate one.
The FSM has the pin out you request.
I would caution, just opening a solenoid at the shock will not let the air bag deflate, the discharge solenoid on the compressor must also be opened. Same with inflation.
Posted 23 January 2004 - 07:50 PM
Thanks for that info.....I will add a switch for the discharge selonoid as well.
Could you be so kind as to post the pinout for the computer? or e-mail me?
Posted 23 January 2004 - 11:19 PM
Posted 24 January 2004 - 07:18 PM
Posted 27 January 2004 - 01:35 AM
I'm gonna try it one more time for this thread and show proof of the camera's limitations. sorry to figure this out and reply so late.....
Posted 27 January 2004 - 03:14 PM
I have identified the compressor relay and the 5 selenoids and have them wired (no swiches installed yet) but would like to take a suggestion theat Skip made and put a lamp/LED on the wires from the swiches in the struts but i havent identified them yet.
Skip will scan the FSM for me......I REALLLLLY appreciate all of the help with this problem and I will post some picts and a schematic of what I did when its all done.
Posted 27 January 2004 - 03:56 PM
Posted 27 January 2004 - 04:26 PM
last summer i had figured out that with the help of a classmate/friend/grad student (he has keys to lab) we would of been able to make a "override board" that would use its own IC chips to allow for manual setting of the struts based on PSI as the known limits (upper) is something like 175PSI.....
and then we'd have 2 guages with a L/R over it and be able to switch between front and rear viewing on each guage.
anywho..... that way we wouldn't be frying the main Height control unit...we would of had a "dumb" curcuit making the brain "think it was set at normal level" and the compressor was also part of this override board's controls.
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