To this point no one has made any specific reference to why the air pump only works for 15 to 30 seconds before shutting off I mean it can’t be a lack of air pressure or over air pressure cause it doesn’t lift the system but it literally only runs 15 to 30 seconds, so what sensor in the entire system would cause that besides sensor number four that I mentioned above in the front area of the vehicle

 

Have you tried to recalibrate your suspension system? If you had a code reader that could view the live values you could get the info you needed to determine if it’s a sensor. Is the rear on the bump stops? Have you tried to assist lifting up the rear and allowing the bags to fill up?

The sensor four I believe you are mentioning is the main valve block which distributes air to the front and or rear.

 

Of all the components in these schematics if the air ride system only that block showed ANY kind of pressure sensor.
he hasn’t been over with the river yet as it’s now fully squatted front and rear, instead of just rear. So I have to go there to help him read his machine and attempt to get live data feed monitoring.

 

I think it's the compressor. What brand is it, and who installed it?

 

No, that is exactly what it can mean. The system monitors the "rate" of air pressure based on various inputs. If the system builds up too much pressure too fast or not enough pressure, it shuts it all down and faults. Too much pressure, blockage. Not enough, leak. Or in either case, internal compressor issue such as a stuck open exhaust (common issue). The codes will say which it is.

 

That makes sense for too much pressure but not too little.
but I totally feel what you’re saying.. when I get to the car I’ll see what systems this will monitor.

but a low pressure shut off makes zero sense on a system that works on pressures well over 100 psi. When this think shuts off it’s doing so very quickly. No compressor this small is going to over pressure that holding tank so quickly, and that’s what’s got me hung up with only one pressure sensor listed in the air system schematic.

 

Okay, well I guess you are the expert then. What do I know.

 

Expert 🤣🤣🤣. Nope but I haven’t seen any hints on that would explain the compressor shutting off after 20 seconds with the system completely empty.

I disconnected the air lines to the compressor and let it pistons to the atmosphere, same thing happened.

and the new compressor is not getting hot, so it’s not that.

so if there’s a low pressure sensor, it’s definitely not listed in any of the schematics, there’s only one pressure sensor listed.

and it’s in block 4 of the above schematic.

I understand that you’re asking for further testing. And I will get to do that after using this guys new scanner.

there’s a four wire solenoid package h up with the compressor, but even unplugging that changed nothing about the compressor shutting off after 20-30 seconds under various tests I’ve already done with hoses physically.

 

Your suggestions are not being ignored, I am regarding everything spoken here, and your snotty reply about me knowing everything was ignored because you are contributing towards solving this dilemma.

there’s logic in every automotive system, finding what’s illogical is the hard part. And a low pressure shut off in an air ride system where there’s four large air bags to fill with a tiny compressor is not logical if the compressor has no time to even start lifting the front.

theres no listing for a low pressure switch, so that isn’t a factor in this particular failure in my personal experience.

if it were a factor, then someone would have some kind of opinion if the part that’s failing causing this compressor to shut off.

 

Well lets see. I tell you something that is literally in the logic programing and you tell me it makes no sense.

And why would there be a low pressure sensor? That would be dumb. There is already a pressure sensor for the gallery.... it reads, you know, pressure.