Thread: SLS.

Originally Posted by V8Ian

Last week I noticed, as it was parked, the right rear suspension was low. A short drive and the rear suspension was far more compliant than usual. During the drive home, a few days later, the rear became low and harsh.
I suspected a leaking RH bag or broken air line. Today was the first opportunity to investigate and the RH bagappears inflated (very solid to touch) but running on the bumpstop.
This leads me to believe the issue is with the ride height valve. Is there a RHV for each side of the car?

Yes. 12 and 13 in the second pic.

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I doubt this has anything to do with an air valve, it's more likely the bag especially if it keeps the level while driving. As long as it's on the bump stop it's clear that there's not enough air in that bag. Better replace it before the compressor burns out as it works in excess to compensate for the leak

The bag appears to be holding air, albeit not at the right height. This occured just after a number of reasonably deep water crossings. Both bags are Contis, a couple of years old.

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Then maybe the height sensor but a valve is the last suspect IMO

Originally Posted by sierrafery

Then maybe the height sensor but a valve is the last suspect IMO

That was going to be my first port of call.

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These numbers relate to what?
The compressor doesn't seem to be working. I can neither hear nor feel vibration from it with the ignition on.
I have substituted a known, working relay to no avail, eliminating that as a cause.
Check fuse, good.
How do I check the compressor and ride height sensors?
The RH side is lower than the L, but both are down.

Those are values related to heights as nanocom calculates them.

sensor value: This shows the current height value of the air suspensionheight sensor. A value of 1 is equal to approximately 1.4 mm between the wheel arch
and ground.

Go to Utility - Calibration, you can activate the compressor from there to raise each side, each start will work for about 1cm. Make sure all the doors are closed and do it with engine running then when all is even store heights... though check at lesst visually the height sensors first eventually disconnect the battery and give some contact spray in the plugs

I've done a visual on the sensors, there's no apparent physical issues.