Rear suspension will deflate but why won't it inflate?

Question 1

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Rear air suspension will deflate but won't inflate. All fuses are good and the compressor relay has been replaced. Jumping out wires at the compressor relay will inflate and maintain height with the rear...

If it is easy to remove the sensor and the plugs are the same. I would try that. That will tell you if the sensor is bad(the rear will inflate). Or if it is the module. (It won't inflate).

Nov 06, 2015 • 2002 Lincoln Navigator

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Suspension deflates in cold weather

air compressors do not operate below 28 degrees you have to get them warm first I assume that your compressor is under your hood as long as you allow your truck to get cold or keep the air suspension your going to have this problem

I’m happy to assist further over the phone at https://www.6ya.com/expert/brock_d67526d2a834c47e

Dec 09, 2013 • 2006 GMC Envoy XL Denali

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Rear air suspension/air bags are deflated Is there a switch to inflate or do I ahve to replace in a 2003 GMC Envoy

check the air compressor for the air bag should be around the top of engine

Sep 20, 2010 • 2003 GMC Envoy

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2006 Lincoln Town car rear suspension problem

The compressor will only inflate once or twice and only within a half hour of the ignition being turned off. If the bags deflate over night there is a leak in the bag and will probably need to be replaced. If you get under the car and take a look at them you will likely see deep cracks in them, specifically around where they fold.

Jan 02, 2010 • 2006 Lincoln Town Car

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My airride on 2000 lincoln navigator will inflate but not deflate

MY 2000 LINCOLN CONT INFLATED A MONTH AGO AND WILL NOT DEFLATE. THE LIGHT COMES ON SAYING CHECK AIR RIDE SYSTEMS. HOW DO I DEFLATE?

Apr 11, 2009 • 1999 Lincoln Navigator

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Driver side air bag suspension will not stay inflated on my 94

Check the sensor located on the rear A-arm, I think it is what send the signal to the compressor telling it to raise or lower the suspension.

Mar 14, 2009 • 1994 Lincoln Continental

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2answers

My back air suspension is not working.

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?

Feb 21, 2009 • 1999 Lincoln Continental

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REAR AIR BAG SUSPENION

Hello;
The inflatrion air valves have probably gone bad. You can buy the valves seperate from the air bags but make sure your bags are in good shape. The air valves come (or did) with the new air bags. May be time to replace the rears with new. Hope this helps, please rate me high;
Rich
RPM northwest

Feb 07, 2009 • 1998 Lincoln Navigator

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Rear air ride shock over inflate and will not deflate

I would recommend going to strutmasters.com and taking a look at the conversion kits. these convert you from the airbag to a powder coated American made steel coil spring that is guaranteed to last the life of the car. Airbags and compressors are constantly having to be replaced. Also something alot of people don't know is that theses air suspensions are not meant to be in temperatures above 90 Degrees or below 40 Degrees. That is most of the world. The temperature will cause you to replace alot of bags. and typically when your replacing a bag you are going to have to replace the compressor to because the bag had a hole or small crack in it causing the compressor to over work and it will die. I posted the link below so you can take a look http://www.strutmasters.com/lincoln-suspension-parts-s/1.htm I hope I was of some help Good Luck!!!

Jan 30, 2009 • 1994 Cadillac Fleetwood

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2answers

Where are the leveling sensors located on a 2003 Navigator?

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

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 .

Disconnect the sensor arm.

3. Remove the bolts and the sensor.

4.

Disconnect the electrical connector.

---------------------------------------------------------------------------------------------

Ride Height Adjustments
Special Tool(s) s3j~us~en~file=st2332a.gif~gen~ref.gif

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

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.

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

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

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).

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).

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

Open the LF door.

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

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

Select 4WAS module.

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

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

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Jan 09, 2009 • 2003 Lincoln Navigator

Question 2

Jeff Armer

Lincoln Master 15,575 Answers
Posted on Nov 07, 2015

Jeff Armer

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Joined: Nov 22, 2012

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That could work , You mite be able to test the sensor in question with ohm meter . Test the front one an see what the resistance is ,then check the back one. I don't know what it should be with out looking it up in the service info . You could also check to see if the sensor is getting power from the control module , an see if there is a return input to the module .
There are a few DTC'S this able to set !
Air Suspension Control Module Diagnostic Trouble Code (DTC) Index
Air Suspension Control Module Diagnostic Trouble Code (DTC) Index DTCs Description Source Action B1318 Battery Voltage Low Air Suspension Control Module Go To Pinpoint Test C . B1342 Air Suspension Control Module Air Suspension Control Module INSTALL a new air suspension control module. REFER to Module-Air Suspension Control . SET the front ride height. REFER to Air Suspension Initialization (Clear DTC B2140). CLEAR the DTCs. REPEAT the self-test. B1485 Brake Pedal Input Circuit Battery Short Air Suspension Control Module RERUN On-Demand Self-Test. MAKE SURE that the brake pedal is not pressed. If DTC is returned again, REPAIR brake pedal position (BPP) circuitry. B1566 Door Ajar Circuit Short to Ground Air Suspension Control Module Go To Pinpoint Test D . B2140 Initialization Failure (Vehicle Ride Height Not Programmed) Air Suspension Control Module REFER to Air Suspension Initialization (Clear DTC B2140). C1439 Vehicle Acceleration EEC-V Circuit Failure Air Suspension Control Module Go To Pinpoint Test E . C1724 Air Suspension Height Sensor Power Circuit Failure Air Suspension Control Module Go To Pinpoint Test F . C1726 Air Suspension Pneumatic Failure Air Suspension Control Module Go To Pinpoint Test G . C1760 Air Suspension Height Sensor High Signal Circuit Failure Air Suspension Control Module Go To Pinpoint Test H . C1770 Air Suspension Vent Solenoid Output Circuit Failure Air Suspension Control Module Go To Pinpoint Test I . C1790 Air Suspension LR Air Spring Solenoid Output Circuit Failure Air Suspension Control Module Go To Pinpoint Test J . C1795 Air Suspension RR Air Spring Solenoid Output Circuit Failure Air Suspension Control Module Go To Pinpoint Test K . C1830 Air Suspension Compressor Relay Circuit Failure Air Suspension Control Module Go To Pinpoint Test L . C1917 Steering Electronic Variable Orifice (EEVO) Out-of-Range Fault Air Suspension Control Module Go To Pinpoint Test Q .

Uneven vehicle height

Circuitry.
Rear pneumatic fault.
Air compressor assembly.
Air suspension control module.

Go To Pinpoint Test I .

Answer 2

David Straughan

Lincoln Expert 43 Answers
Posted on Aug 31, 2017

David Straughan

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Joined: Aug 31, 2017

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It sounds like there's a fault in the communications in your system. Maybe check to see if the solenoids need replacing. You could also have a leak somewhere that's causing some miscommunications.

There's a company called Strutmasters that makes kits that allow you to replace the air suspension with a coil suspension. I've installed a number of them for friends/family and they've all been pretty happy. Super inexpensive and an easy install if you have some basic tools and an afternoon. They have quite a few cars in their inventory.
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Rear suspension will deflate but why won't it inflate?

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Jeff Armer

David Straughan

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