AIR SUSPENSION DEFLATED!!

make sure you have air being pumped to that side air bag ,also check leveling valve on that side that determins if air is put in or let out, make sure pump is working at all, disconnect lines to check for air being pumped ,BE CAREFULL bags my deflate causing car to lower , check fuses for suspension control . I hope this helped .
Woody

You need to find someone with a scan tool that can access the air suspension and manually cycle the individual springs to restore level. As a word of advise, turn the air suspension switch off, before you hoist the vehicle. This will prevent the compressor from inadvertently filling the air springs.

do you need to know which fuse enables the air suspension system? and have you checked the "on/off" switch in the trunk? Could be Fuse #8

you can remove the rear lines at the air bags to deflate. most likely the problem is the air suspension control module is not turning the venting valve on to release the air from the bags.

Take the air springs out, they will always be nothing but trouble and install these:

http://cgi.ebay.com/ebaymotors/Rear-Suspension-Air-Bag-Coil-Spring-Conversion-4WD-_W0QQcmdZViewItemQQfitsZModelQ3aExpeditionQQhashZitem483ec91214QQitemZ310291010068QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

I had same problem check ride height sensor on the right front mine was stripped ....Bad news theyare 300 bucks each.

The air ride suspension light turns on when for whatever reason the air ride suspention is NOT on. So, either the suspension switch in the trunk is turned off, or you have a problem with your air ride suspension. I ran into the same thing last week. When I checked the switch in the trunk, sure enough it was switched on. I flipped the switch off, turned the car on and then flipped the switch in the trunk to on position. It has been fine ever since. Give it a try. GOOD LUCK.

it should deflates only at trim height and shld stay at that level considering that there is no leak on the rear air suspension. Most probably leaking rear air suspension is the problem. The system works up to 45 minutes only after ignition off and will maintain the trim height

First, check to make sure the air pump switch is "on" and nott turned off due to a tire change or other suspension work. Look in your owner manual for the location in the trunk.
Did you just have repair work done?
Also, check fuses & relays. Info in owner manual.
Let us know what you find so we can help.

Basically, this system has rubber air bladders that have lines running from an electric pump that inflates or deflates the air bags (springs). There is a small computer box that reads a height sensor in the rear, It will add air if too low, and let air out if too high.

Is yours fully deflated?

There is one at each wheel. here is some info

Vehicle Dynamic Suspension The four wheel air suspension system is comprised of the following components:

• service switch
• control module
• two front height sensors
• one rear height sensor
• compressor and drier assembly (includes vent solenoid)
• air lines
• front and rear air spring and shock absorber assemblies
• four air spring solenoids

WARNING: The service switch for the air suspension system must be shut off prior to hoisting, jacking or towing an air suspension vehicle. This can be accomplished by turning off the air suspension switch located in the jack storage area in the rear of the passenger compartment. Failure to do so may result in unexpected inflation or deflation of the air springs which may result in shifting of the vehicle during these operations.
WARNING: Do not remove an air spring under any circumstances when there is pressure in the air spring. Do not remove any components supporting an air spring without either exhausting the air or providing support for the air spring to prevent vehicle damage or personal injury.
Air Suspension Pneumatic Diagram
Item Part Number Description 1 5319 Air compressor and drier 2 5B322 Air line T-fitting 3 5B321 Air line union 4 — Air line Y-fitting 5 18945/5311 Air spring and solenoid

Suspension Height Sensor Removal and Installation
NOTE: Front shown, rear similar

1. WARNING: The electrical power to the air suspension system must be shut off prior to hoisting, jacking or towing an air suspension vehicle. This can be accomplished by turning off the air suspension switch located in the LH quarter trim panel. Failure to do so may result in unexpected inflation or deflation of the air springs which may result in shifting of the vehicle during these operations.
   Raise and support the vehicle. For additional information, refer to Section 100-02 .

1. Disconnect the sensor arm.

3. Remove the bolts and the sensor.
4.

1. Disconnect the electrical connector.

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Ride Height Adjustments
Special Tool(s) Worldwide Diagnostic System (WDS)
418-F224

New Generation STAR (NGS) Tester
418-F052 or equivalent scan tool
Inflation and Deflation of the Air Suspension System

1. NOTE: Make sure that the air suspension switch is in the ON position
   NOTE: Make sure that a battery voltage of at least 11 volts is maintained while carrying out this procedure.
   Turn the ignition switch to the ON position.

1. Connect scan tool to the data link connector (DLC).

1. Select Air Suspension Control Module under Active Command Mode:
   • VENT FRNT to deflate the front down.
   • LIFT FRNT to inflate the front up.
   • VENT REAR to deflate the rear down.
   • LIFT REAR to inflate the rear up.

Calibration
Ride Height Resetting

1. NOTE: Make sure that the air suspension switch is in the ON position
   NOTE: Make sure that a battery voltage of at least 11 volts is maintained while carrying out this procedure.
   Turn the ignition to the ON position.
   • Exit the vehicle, close all doors and allow the system to vent the vehicle down to kneel height (approximately 45 seconds).

1. With the ignition remaining in the ON position, shift the vehicle into DRIVE and then back to PARK.
   • Exit the vehicle, close all doors and allow the vehicle to pump to trim (approximately 45 seconds).

1. Measure the ride height. For additional information, refer to Section 204-00 .

1. Open the LF door.

1. Connect scan tool to the data link connector (DLC).

1. While outside of the vehicle, select the proper vehicle year, model and engine type.

1. Select 4WAS module.

1. Using the active command mode, vent or lift the vehicle to achieve the correct ride height.

1. Select the "Save Calibration Values (Store Ride Height)" scan tool command to calibrate the 4WAS module.

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