i have received the "air suspension fault" from my 05 XJR with 90k miles,,
i pulled over and found the rear left lowered and heard the air hissing out the wheel well,,
the front is still ok and after 5 days of parking,, i got the rear right also lowered,, do i have the rear pair gone?

 

Not necessarily, because the ASM will attempt to keep the car level. It therefore adjusts the height of the other spring unit to match the failing one. Front wheels are controlled together, there is no separate adjustment.

 

You may verify a leak by disconnecting the 2 connectors at the manifold, located under the spare tire.

1. Allow the suspension to fully inflate.
2. Turn-off ignition/remove key.
3. Remove the spare tire and air tank foam cover.
4. Disconnect the 2 connectors.
5. Wait a few hours (dependent on severity of leak) for the bad side to lower.

With the connectors disconnected, only the bad side will lower as the system will not be able to auto-level itself.
I had to let it sit about 4 hours, others have waited over-night.

 

thanks for the information but the car won't even level up when i start the engine,, i just hear extreme hissing from rear tires until the compressor gives up,,

 

it sounds like a major leak im affraid, you will need to trace where the hissing is coming from.

regards

Andy

 

it is major,, could it be anything else but the shock?

 

Sorry but I think it's the shock too. Seems that this is the time of year for shrinking and cracking of rubber stuff. If it were the distribution block you'd hear it in the boot. One possibility is a loose connector where the air line goes into the shock but I'm guessing the cold and wear just got to the shock. reman. shocks are around for < half the price of dealer.

 

I believe it is your shock, the airlines are connected to the shock in the boot. If you are hearing air from the wheel well then it is the shock. You still have one more easy verification you may do:
Remove the left side trunk/boot liner and check the airline fitting on top of the shock.

Note: the attached documents show the right side shock.
#1 the boot liner being removed.
#2 the wrench is at the airline fitting.

 

Is the vehicle parked outside or in a warm garage? If outside, what are the current average temps in your area?

 

Love my coilover conversion more every time I see one of these threads. I was there once .Now I no longer worry about the low rider look.

 

never lower than 60F/15C

 

i will try this and let you know,,
thanks a lot for the attached,,

 

silly i couldn't manage even to take the left liner off,, should i take the trunk floor liner off too? how?

 

I don't know how the manual states this, but this is the easiest way I found on removing the liners:
1. Remove the floor liner - (2 ea T-30 screws)

2. Remove the left side liner- (3 ea Push-Pins/Trees



3. Remove the right side liner - (2 ea Push -Pins/Trees

4. Remove the Foam covers protecting the shocks.



5. Conduct tests or replacement



6. Reverse order to re-install liners.

 

Most likely the Air bladder is shot (90%)