The rear end of the car dropped totally the other day while driving. The car has Airmatic only.

I don't think it is a rear air strut, as when one of those goes, just that side drops down. I have replaced both rear struts with the Arnott's , which have worked very well.

I tried using the Airmatic rise button and the Airmatic Rising message shows in the dash, but nothing rises, front or back and the message stays on. I am not hearing a pump, or any noises.

Is there a fuse that could cause this, or a rear height sensor?

I have the back of the car up on stands, and can't see anything that looks off or broken.

Any input is appreciated.

 

You can check the Airmatic relay and fuse. The rear level sensor is between the center of the anti-sway bar and the chassis.

 

Thanks. Would a relay or fuse just drop the rear?
Is there a fuse diagram available to locate the relay and fuse?

 

My first suspicion would be the rear leveling sensor or its wiring.

 

Thanks for the help.
It turns out that the ride height sensor rod from the sway bar to the chassis became disconnected at the pivot ball.
I got it back in and zip tied it in place for now.

It seems like there was rubber or plastic casing that held the rod, encasing the pivot ball.
Would I have to replace the entire rod to get this casing part?
I hear the rod is a pita to replace