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No air to flat airbags
Posted 10 March 2009 - 04:54 AM
I hope someone can help me out with this one.
The airbag gremlins have attacked my 1990 Legacy (Australian "Liberty"), there is air flowing to the inlets on the front strut control solonoids but nothing coming out (can I check the rears without dismantling the strut?) . Is this symptomatic of a control unit malfunction or simply a leak somewhere?
Posted 10 March 2009 - 05:14 AM
If it's a wagon you own, you should be able to check the rear solenoids by removing the rear speakers.
For what it's worth, once my air suspension started playing up, I fiddled with it for a while but eventually got coilovers put in. I miss being able to adjust the clearance, and also it seems to have a fair bit less travel.
But that's once in a blue moon, and in 99% of the situations, it handles a whole lot better.
Posted 10 March 2009 - 08:04 AM
the air suspension is a really flake monster sometimes. it's not worth it for most folks.
lots of diagnosis info posted on here, you can also check subaruxt.com - since all 4WD XT6's have air suspension we have a good bit of info on the system over there and they are identical in function.
Posted 10 March 2009 - 10:28 PM
Tank pressure gets too low then another signal is sent to the compressor and it restores pressure.
Posted 11 March 2009 - 05:13 AM
Posted 11 March 2009 - 06:25 AM
I'm assuming here both front struts went flat. Can't believe both struts or both front solenoids failed simultaneously. My guess is the problem is that control unit under the carpet.
Posted 13 March 2009 - 06:10 AM
Posted 13 March 2009 - 07:43 AM
Posted 16 April 2009 - 06:23 AM
I've hopefully had a win in keeping my 90 Liberty/Legacy wagon on the road & I hope the solution will help someone else. In frustration I took the car to a Subi' dealer in the hope the experts could pinpoint the apparent electrical fault. When raised a little on the hoist the bags began to inflate - it seems when the suspension is completely flat the magnets that activate the height sensors are out of range of the switches and the control unit doesn't act, raise it to the normal height range and up it goes. Unfortunately the suspension was flat 24 hours later and despite the mechanics being unable to find any obvious leaks in the airbags all they could suggest was to replace the lot with conventional suspension - not something I can afford at the moment.
With the car at home I noticed air venting from the compressor inlet/vent tube while the ignition was off - I'd noted that the "End Wrench" article describing the system's operation mentioned that the solonoid controlling the venting would only be open when powered and reasoned that something must be jamming it open. I removed and dismantled the compressor unit and blew a collection of dried bugbits out with an air gun, the dryer canister also yealded a pile of brown grit which I suspect came from its corroding insides.
After re-assembly everything seems OK so far.
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