: Air Ride Questions



chrisnlbc
10-23-12, 11:12 AM
Hello Everyone,

I just purchased a used 2005 Escalade AWD and have a question with the air system. When I am towing my travel trailer, I noticed yesterday when I pulled over from after driving an hour or so that the back had lost all air. My chains were dragging etc.

When I turn on the truck, you can hear the compressor going, and it pumps up fine the stops once it reaches level height.

My question....obviously its supposed to pump and compensate the whole time driving. What is going bad? Compressor or Shocks? Also it loses air while its parked overnight? Are the shocks supposed to leak down while sitting?

I want to take it back to the selling dealer because obviously something isnt right.

Thanks!

Chris

the cadillac man
10-23-12, 03:48 PM
Hello Everyone,

I just purchased a used 2005 Escalade AWD and have a question with the air system. When I am towing my travel trailer, I noticed yesterday when I pulled over from after driving an hour or so that the back had lost all air. My chains were dragging etc.

When I turn on the truck, you can hear the compressor going, and it pumps up fine the stops once it reaches level height.

My question....obviously its supposed to pump and compensate the whole time driving. What is going bad? Compressor or Shocks? Also it loses air while its parked overnight? Are the shocks supposed to leak down while sitting?

I want to take it back to the selling dealer because obviously something isnt right.

Thanks!

Chris

You will need to replace your shocks as they are leaking due to age and wear plus if you don't replace them soon you will need to replace the compressor as well as it will burn it up by trying to keep the truck level

'49 Ford Coupe
10-24-12, 10:26 AM
Well, here is my two cents. There is probably a leak in a fitting/tubing/and/or shocks. The valves in the compressor may be leaking back, and there may be no leaks at all external to the compressor. It's a pain in the butt, but get under the truck and load up a spray jug with soapy water and spray it everywhere related to the system. You may have to pull out the compressor/bracket assy behind the drivers side rear wheel. Three bolts, you don't have to take the bolts all the way out, just loosen them and lift it up and slide it out. See my posts on other threads about what's going on with the ride system. If you need a compressor, get the Arnot out of Florida.

chrisnlbc
10-24-12, 07:05 PM
Thanks Guys. I will do the spray jug test. Today I just drove the truck and the "Service Ride Control" alert came on the the panel. Does that mean something finally went bad?

the cadillac man
10-24-12, 07:53 PM
Thanks Guys. I will do the spray jug test. Today I just drove the truck and the "Service Ride Control" alert came on the the panel. Does that mean something finally went bad?

Get the codes pulled most likely the exhaust valve solenoid had failed meaning the compressor will need replacing(unless its is a sensor)

'49 Ford Coupe
10-24-12, 11:02 PM
To be more precise, the exhaust solenoid is the one single source of the most common failures in this system. Not only did the GM engineers f' up in placing the compressor in the worst possible location for water contamination, but the solenoid which is attached to the compressor IS NOT water proof. Hence, early failure. Caddy parts dept wants 500 bucks for a compressor, cause they DO NOT sell the solenoid by itself. GET the Arnott compressor, which has a dryer rebuild kit, fix it yourself for about 200 bucks...

chrisnlbc
10-25-12, 01:42 AM
Get the codes pulled most likely the exhaust valve solenoid had failed meaning the compressor will need replacing(unless its is a sensor)

Thanks, whats a cheap scan tool I can buy? What type do i need?

Chris

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I will do that , thanks for the info!

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To be more precise, the exhaust solenoid is the one single source of the most common failures in this system. Not only did the GM engineers f' up in placing the compressor in the worst possible location for water contamination, but the solenoid which is attached to the compressor IS NOT water proof. Hence, early failure. Caddy parts dept wants 500 bucks for a compressor, cause they DO NOT sell the solenoid by itself. GET the Arnott compressor, which has a dryer rebuild kit, fix it yourself for about 200 bucks...

Thanks 49 I appreciate your advice.

----------


To be more precise, the exhaust solenoid is the one single source of the most common failures in this system. Not only did the GM engineers f' up in placing the compressor in the worst possible location for water contamination, but the solenoid which is attached to the compressor IS NOT water proof. Hence, early failure. Caddy parts dept wants 500 bucks for a compressor, cause they DO NOT sell the solenoid by itself. GET the Arnott compressor, which has a dryer rebuild kit, fix it yourself for about 200 bucks...

Thanks 49 I appreciate your advice.

'49 Ford Coupe
10-25-12, 10:58 AM
Pull the compressor/solenoid out and ohm the solenoid. You will most likely find an open circuit. The 'puter monitors that circuit, and if it sees an open circuit, it will not tell the control relay under the hood to pull in, and shoots the error message.

the cadillac man
10-25-12, 11:31 AM
Chris no basic scan tool can get that code that I know of(I have one myself no dice) the only way is with the tech-2

chrisnlbc
10-25-12, 11:34 AM
Pull the compressor/solenoid out and ohm the solenoid. You will most likely find an open circuit. The 'puter monitors that circuit, and if it sees an open circuit, it will not tell the control relay under the hood to pull in, and shoots the error message.

Whats odd is that my compressor turns on when starting the truck for 10 seconds and airs up the back. Would it still do this if it had this open circuit?

the cadillac man
10-25-12, 03:22 PM
Pull the compressor/solenoid out and ohm the solenoid. You will most likely find an open circuit. The 'puter monitors that circuit, and if it sees an open circuit, it will not tell the control relay under the hood to pull in, and shoots the error message.

Whats odd is that my compressor turns on when starting the truck for 10 seconds and airs up the back. Would it still do this if it had this open circuit?

Nope it don't do a thing I know mine is like this.

'49 Ford Coupe
10-26-12, 01:23 PM
If it airs back up, or the compressor comes on AT ALL, then the solenoid is good.... hmmmm

Black88GTA
10-26-12, 06:39 PM
If it airs back up, or the compressor comes on AT ALL, then the solenoid is good.... hmmmm

Is it possible that the shocks / lines are leaking, but the compressor hasn't died yet? I would think that leaking shocks may cause the level sensors to never reach their cut-off point, which in turn would cause a constant run condition on the compressor until it times out. Does anyone know if the event of the compressor timing out trips the SRC message?

In this scenario, I'd pull the harness to the compressor until I could get the shocks / lines inspected for leaks. It appears that (for now at least) the compressor may still be OK (since it runs), but allowing the compressor to constantly run like that will kill it. When I was troubleshooting my own SRC message this summer, I plugged in an Auto Enginuity tool on loan from a friend which told me that I had an open exhaust solenoid on the compressor. I never once heard my compressor running. Turned out I needed both rear shocks and a replacement compressor.

sprink60
10-27-12, 05:33 AM
I have a similar condition. I have replaced my shocks with Arnott's replacement OEM pieces and I get some lift but not what it should be. The air bags never fully inflate on my shocks so I suspect lines and compressor. My compressor runs but is noisy. I spoke to Arnott about this and they think my compressor is weak and is not creating enough pressure and is timing out...I have no codes.

My next step is to replace the compressor, check the lines and replace them as well. The Arnott folks are great to deal with and even offered me additional discount on the compressor since I purchased the shocks from them. I am not sure if Arnott sells the lines. Has anyone here had to replace them and if so where did you purchase same?

I haven't looked at the compressor yet to see how tough it is to replace... shouldn't be a big deal from what I have read here.

This is a great forum...lot's of good info here and thanks to all that contribute....I would know nothing about this Air Ride system had I not read about it here.

Stay tuned.

the cadillac man
10-27-12, 10:52 AM
I have a similar condition. I have replaced my shocks with Arnott's replacement OEM pieces and I get some lift but not what it should be. The air bags never fully inflate on my shocks so I suspect lines and compressor. My compressor runs but is noisy. I spoke to Arnott about this and they think my compressor is weak and is not creating enough pressure and is timing out...I have no codes.

My next step is to replace the compressor, check the lines and replace them as well. The Arnott folks are great to deal with and even offered me additional discount on the compressor since I purchased the shocks from them. I am not sure if Arnott sells the lines. Has anyone here had to replace them and if so where did you purchase same?

I haven't looked at the compressor yet to see how tough it is to replace... shouldn't be a big deal from what I have read here.

This is a great forum...lot's of good info here and thanks to all that contribute....I would know nothing about this Air Ride system had I not read about it here.

Stay tuned.

Take some soapy water and give the lines a good soaking if no bubbles appear then the compressor is getting worn out.

chrisnlbc
11-02-12, 01:32 AM
UPDATE: Took it to dealer, here is what we had happening: No Power at DLC, Inspected and found blown 15 amp fuse, Code C0625 was found. Left Rear Height Sensor rod disconnected. Reconnected and its been working fine so far. I will be pulling my trailer this weekend and we will see if it stays pumped up!

Thanks for all the help guys.

chrisnlbc
11-05-12, 12:46 PM
UPDATE AFTER TOWING:

Well, its still sinking:( After the work they did, I loaded up my trailer. took off, when I got to destination, same thing, back end on the ground. I guess they cant check it at the dealer with a load, buts its still irritating. Going to go up underneath today and spray soapy water.

the cadillac man
11-05-12, 05:46 PM
UPDATE AFTER TOWING:

Well, its still sinking:( After the work they did, I loaded up my trailer. took off, when I got to destination, same thing, back end on the ground. I guess they cant check it at the dealer with a load, buts its still irritating. Going to go up underneath today and spray soapy water.

Check the lines one may be bad or has a pinhole leak in it.

2MCHPWR
11-08-12, 07:36 AM
i went through same exact thing: sagging rear while towing.
sprayed water on shocks and saw bubbles so got the arnott/bilstein shocks.
Installed them but compressor sounded weak and would sputter on/off.
Then bought arnott compressor and swapped it on and its great now. Truck rear is pretty high.
The stock dryer can was a bitch to open up but once opened, it was corroded inside and filled with water. The arnott compressor came with a new dryer can so that was cool.

wsumiel
11-10-12, 12:10 AM
I get a "Service Ride Control" messge everytime I start my 2005 Escalade EXT but nothing else seems to be wrong. What can cause this? Could it be a bad sensor?
Thanks Guys. I will do the spray jug test. Today I just drove the truck and the "Service Ride Control" alert came on the the panel. Does that mean something finally went bad?

the cadillac man
11-10-12, 12:38 AM
I get a "Service Ride Control" messge everytime I start my 2005 Escalade EXT but nothing else seems to be wrong. What can cause this? Could it be a bad sensor?

The only way to tell is have the codes pulled at the dealer with the tech-2 most likely it's the compressor.

sprink60
11-10-12, 03:23 AM
From my other thread

"I had already installed their OEM Re Built shocks because mine were shot. I still had a rear end sag problem with my boat trailer loaded and suspected my compressor wasn't putting out enough pressure because it was worn out...I was correct. I installed the Arnott replacement compressor and drier rebuild kit and bingo...no more problem. The truck is very stable, rides like a cloud and sits level with 400 lbs of tongue weight on it. It took about 2 hours to do the job and now have Arnott's complete Air Shock/Compressor replacement package with a lifetime warranty for less than $500.

I recommend this to those of you with rear Air Ride issues."

nsx24
11-24-12, 05:24 PM
So I am having the same service light and compressor NOT coming on. I did the relay jump with a wire and the compressor came on, so I then pulled off the air lines to the shocks to see if the compressor was pumping air and both sides had air being pumped. So where do I go now as I know the compressor comes on when jumped. I know it is pumping air to each shock. But not coming on with the key. HELP.

Pitbull14218
01-24-13, 07:49 PM
Bad relay?