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Rear leveling

6K views 31 replies 11 participants last post by  STS-4000 
#1 ·
Now i don't even hear the compressor on start-up with a lot of objects in the trunk? Compressor or the sensors the shocks are good no leaks what could it be? Where are the sensors located? does it look like its sagging a lot remind you im on a slight incline Land vehicle Vehicle Car Cadillac sts Mid-size car
 
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#13 ·
MRC is a suspension control system, no leveling involved.

ALC/ELC uses rear shocks with auxiliary air bladders, height sensor(s) and a controlled compressor to compensate for extra weight in the trunk or rear seat. It is NOT "air ride".

Google "lord delphi magnetic ride control system".
 
#27 ·
I hate to say this, but floor-to-fenderwell measurements have absolutely NOTHING to do with ride height measurements. Two different tires or even different tire inflation pressures (on different cars) can throw that measurement off by as much as 0.5" or more.

Suspension heights are measured using a specific set of specs from the service manuals - it's related to the geometry of the lower suspension arms, and there is a specific set of loads that are used when doing the measurements.

ELC compressors (systems) do a prove-out shortly after Key:ON - you'll never see a height change during that sequence.

Turn the Key:ON and let the ERC do its preload. Pop the trunk - 3 of you hop onto the open trunk lip. ELC should level the rear. All hop off - you should hear air escaping in the RR wheelwell as the system again levels the rear.
 
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