Question about 2004 Lincoln Navigator

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My licoln navigator front suspension is not working..stays deflated

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OK. Everyone, you need to understand the system operation. The main components are: Air compressor, air dryer, houses, solenoid valves, air bags, level arms, and automatic leveling module. 2003 to 2006 Lincoln navigator and most probably all the rest work the same. The compressor pumps the air in the air lines, then the level arms measure the angle (height) of each suspension by itself, sends a signal to the leveling module which in turns open or close the solenoid valve when the compressor is running or shut down. If running that is to inflate the bag and vise versa. It is quite very simple system. Now, if all you bags are deflated, then check the air compressor. The air compressor will go bad, mostly if there is a leak someone that forces the compressor to run more than its design ratings. If one only, it maybe any of the followings, the level arm is not sending the right signal, the solenoid is not functioning as desired, or the bag or the seals are leaking. If totally deflated unlike the others, without a sign that it is trying to inflate, but it leaks obviously, then check the control arm. If you hear it leaking, then get water and soap and try to find the leak. usually, it is a seal. Either the solenoid valve seals ($10) or the airbag seals ($25). Don't listen to all the drama on the internet that is calling to replace your air bag for springs. It is just marketing. One air bag, runs for ($150), Air compressor ($200). Easy fixes, even the airbag seals themselves.
Note, if your compressor runs every time you turn on your switch, there is a leak. Fix it fast to maintain your system integrity.

Posted on Jun 06, 2012

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First, you should have a warning light telling you it is not working. There is a switch for the air suspension underneath the glovebox-right hand side or in the rear hatch area on the left panel..make sure it's on. If all 4 air bags are deflated it could mean the air pump or actuator is malfunctioning.

Posted on Jan 06, 2010

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2 Answers

2000 lincoln navigator air suspension will not deflate


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It is cheaper to buy 1 correct part than several wrong part guesses.

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My airride on 2000 lincoln navigator will inflate but not deflate


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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
s3j~us~en~file=ani_caut.gif~gen~ref.gif 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.
s3j~us~en~file=ani_caut.gif~gen~ref.gif 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 17d59a6.gif
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. s3j~us~en~file=ani_caut.gif~gen~ref.gif 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. 721ed10.gif
3. Remove the bolts and the sensor. b198e3c.gif
4.
  1. Disconnect the electrical connector.
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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
  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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Jan 09, 2009 | 2003 Lincoln Navigator

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