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1990-1997

Lincoln Town Car Air Suspension Parts


Lincoln Town Car Air Suspension Parts Locations

Here at American Air Suspension, we can assist you in diagnosing the air suspension system and supply you with the best affordable replacement Lincoln Town Car air suspension parts. Parts like a Lincoln Town Car Airbag, air suspension compressor, dryer and solenoids if you are set on keeping the air suspension. To prove our abilities, we have provided some diagnostic help towards the bottom of this page.

For those who want to watch how much they spend on a 20+ year old car, we also offer an affordable Air Suspension Conversion Kit for your Town Car it where you convert your vehicle to a conventional coil spring suspension
. No unexpected suspension failures, no specially trained tech to diagnose, just a good old fashioned suspension any mechanic can work on!
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Lincoln Town Car Air Suspension Compressor Lincoln Town Car Airbag
Lincoln Town Car Air Suspension Compressor
Price:$175.00>Includes $25 refundable core charge

1990-1997 Town Car

1990-1997 Town Car
Lincoln Town Car Rear Shocks Lincoln Town Car Dryer

1990-2002 Town Car

1990-1997 Town Car
Lincoln Air Suspension Solenoid

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What normally goes wrong on Town Cars?

LINCOLN TOWN CAR AIRBAGS

With age, the rubber air bladder will dry rott and eventually leak air. The leak will almost always be on the fold of the rubber. This is where the rubber folds over itself and that area changes with vehicle height. Upon inspection, you may not see any visible cracks until the height has been achieved where the car has sat most of its life. Once this area has been found, cracks will magically open up on the fold.
Early in the stages of a leak, it will only leak while being driven. Remember that the system is all automatic, so if there is a leak, you probably won't realize theres even a problem until one of two things happen:
#1 The leak gets so bad that its leaking more air out than the air suspension compressor can put back in.
#2 The Lincoln Town Car air suspension compressor is damaged and can't keep up with the load.
As was stated before, in the early strages of a leak, it will only leak while being driven. As time goes on, you will probably notice the rear of the car going down one or more nights in a weeks time. The number of days the rearend is down will increase as time goes on.
Even driving the car, the leak will get progressively worse and eventually to the point where you can't drive the car.

REMEMBER THIS:
ANY air suspension compressor produces moisture. When a system has a leak and the compressor has to run 2-10 times more than it would normally, the will produce 2-10 times more moisture than it would normally.


MOISTURE PROBLEMS:
In time, the moisture absorbing gel beads in the dryer lose their ability to remove the moisture from the incoming air. Moisture is then able to make its way back to the rest of the system. Turning every low lying area into a moisture reservoir.
The dryer also turns into a reservoir for water. In other words, when the compressor vents, moisture will be blown back through the suspension compressor. This is very hard on a part that was designed to be operated dry. These problems include, but are not limited to:
Swelling of the piston rings, which makes the electric motor have to work that much harder to do the same job and increases the heat made by the air suspension compressor, which is hard on any sealing o-rings in the high heat area.

Rusted and corroded compressor vent solenoid

Rusted and corroded end plates inside the dryer

Rusted and corroded intake & exhaust valves in the compressor

Damaged armature & brushes

WHAT CAN BEEN DONE?
Because so many problems start with a leak, I recommend doing a leak test once a month on any car over 5 years old. This way, you will find the leak that is only a maximum of one month old BEFORE it has had a chance to do any more damage.



DIAGNOSING A LINCOLN AIR SUSPENSION PROBLEM WITHOUT A SCAN TOOL

The best way to find out what's wrong with a Ford/Lincoln air suspension system(by the book), is to use a scan tool and retrieve any codes stored in the memory. Knowing the codes in the memory allows you to learn what fault(s) occurred sometime in the past and depending on the system, will usually store these codes for 80 ignition cycles. When working on an intermittent or Hard Fault problem, knowing the code(s) in the memory may be the difference between fixing the problem and throwing parts at the car until you run out of money......or you go bankrupt! Keep in mind this article WON'T help you with Hard Fault problems, as the suspension light coming on immediately and staying on with a Hard Fault, cannot be counted on for a required clue.
For the shade-tree mechanic, it is close to impossible to find the correct scan tool locally. Lucky for you, we at American Air Suspension, have devised a way to figure out what's wrong most of the time...without the need of a scan tool!


Let's get started....
To diagnose an Lincoln Town Car air suspension problem without a scan tool, it's imperative to know when the check suspension light is coming on. If theres any doubt how much time it takes for the check suspension message to come on, simply use a watch and start timing approx. 3-5 seconds after the ignition is turned on.

If the check air suspension message appears....
......IMMEDIATELY AFTER STARTING THE VEHICLE, you have a hard fault. When the ignition is switched on, the module will do a quick test of all the circuits and sensors. If it sees something that is out of range or that it simply can't deal with, it will turn the check suspension message on and shut down the system. After the ignition is turned off, then back on again, it will try it again. If the module still detects a problem, it will turn the light on and shut down the system again and will continue to do until the fault is repaired.

WHAT COULD BE WRONG?
1) The problem could be a bad height sensor
2) A bad vent solenoid in the air suspension compressor
3) A bad solenoid
4) In the wiring
5) Although pretty rare, even a module
It would be in your best interest to have the codes pulled in the memory to have somewhere to start. A repair job can get really expensive if you just throw parts at the car.

......45 SECONDS AFTER STARTING THE VEHICLE, this means the module has timed-out or has simply taken too much time to accomplish the venting goal set forth by the module. If the module thinks the car needs to be lower, the module will only try to VENT the car for no longer than 45 seconds before timing out. This means, after 45 seconds, if the car hasn't vented down exactly where the module thinks it should be, even if it's close, if it's not exactly where the module thinks it should be, the module will assume there's a problem and turn the message on and shut the system down.

WHAT COULD BE WRONG?

* 1) The vent solenoid has corroded badly and no longer functions properly *
(very common Town Car problem)
2) A damaged or clogged dryer
3) A crimp or restriction in one or more air lines
If the vehicle does have a corroded vent solenoid, and the moisture problem is not addressed, the moisture will damage the replacement Town Car air suspension compressor. How long the replacement suspension compressor lasts depends on how much moisture is in the system.

Moisture can effectively be taken care of by replacing the dryer several times in a 6 month period, then once a year afterwards.

.......90 SECONDS AFTER STARTING THE VEHICLE, this means the module has timed-out, or has simply taken too much time to accomplish the raising goal set forth by the module. The module will try to RAISE the car for no longer than 90 seconds before it times out or gives up. This means, after 90 seconds, if the car hasn't raised up exactly where the module thinks it should be, even if its close, if its not exactly where the module thinks it should be after 90 seconds, the module will assume theres a problem and turn the message on and shut the system down.

WHAT COULD BE WRONG?

* 1) Leaking airbags *
* 2) A weak air suspension compressor *
3) A clogged or pinched compressor snorkel hose
3) Compressor relay
4) Although rare, even a module
5) Excessive leak at line connection(s)
6) Basically anything that will slow down the flow of air in the system

You need to see if the air suspension compressor comes on for up to 90 seconds after the ignition is turned on. If it doesn't come on, you should find out if the big red wire on the compressor has power during this 90 second period. If you have power at the big red wire at the compressor, but it doesn't run, replace the compressor. If the suspension compressor IS coming on, you may have a leak in the system and the leak(s) maybe leaking more air than the compressor can put back in.

.......WHILE DRIVING THE VEHICLE, this means the module has timed-out, or has simply taken too much time to accomplish the a goal set fourth by the module. The module will try to RAISE the car for no longer than 90 seconds before it times out or gives up. This means, after 90 seconds, if the car hasn't raised up exactly where the module thinks it should be, even if its close, if its not exactly where the module thinks it should be after 90 seconds, the module will assume there's a problem and turn the message on and shut the system down.

WHAT COULD BE WRONG?
* 1) Leaking airbags *
* 2) A weak suspension compressor *
3) A clogged or pinched compressor snorkel hose
4) Compressor relay
5) Excessive leak at line connection(s)
6) Although rare, even a module
7) Basically anything that will slow down the flow of air in the system

PULLING AIR SUSPENSION CODES ON THE TOWN CAR, GRAND MARQUIS & CROWN VICTORIA
(1990-1997)SUPER STAR II Tester 007-0041A must be used for this procedure

Rotunda Super Star Tester

The absolute best way to find out whats going on with an Ford/Lincoln air suspension system, is to use a scan tool and retrieve any codes stored in the memory. Having the codes in the memory allows you to learn what fault(s) occured sometime in the past and depending on the system, will usually store these codes for 50 ignition cycles. When working on an intermittent problem, knowing the code(s) in the memory maybe the difference between fixing the problem and just guessing. This same scan tool can also be used to perform function tests which work great for Hard Fault problems that occur all the time.

This part of diagnostics is divided into three areas:
Auto/Manual Diagnostic Check
Diagnostic Trouble Code (DTC) Display
Functional Tests
AUTO TEST DIAGNOSTICS

ATTENTION
BEFORE TRYING TO RETRIEVE ANY CODES IN THE SYSTEM, YOU MAY WANT TO HAVE THE BATTERY & CHARGING SYSTEM CHECKED. A WEAK BATTERY WILL CAUSE ALL SORTS OF PROBLEMS IN THE AIR SUSPENSION. AUTOZONE AND A FEW OTHER AUTO PARTS STORES WILL USUALLY DO THIS FOR FREE


READ THIS FIRST

At the beginning of the automatic portion of the test, the control module checks for defective control module (DTC 70), for unstable battery voltage (DTC 80), then for shorted or open conditions that would create DTCs 39 through 46, and 68 through 71. If shorts or opens are detected, the automatic portion of the test is ended and a DTC 13 (Auto Test Failed) will be displayed on the SUPER STAR II tester. If no shorts or opens are detected, the automatic portion of the test continues. The control module attempts to raise and lower the vehicle to verify that the height sensor states (trim, high, and low) can be reached. A properly functioning vehicle will be at trim height at the end of the Auto Test. If all three states are not reached, the Auto Test will end and again a DTC 13 will be displayed. A DTC 12 will be displayed at the end of the Auto Test only if everything checked to this point is functional.

After the DTC 12 (or DTC 13) is displayed, the control module is ready to check for manual inputs. The manual inputs check the steering sensor and the door courtesy lamp switch circuits. During the manual test, the module continually monitors the door Circuit 159 or 24 and the steering sensor Circuits 633 and 634 Town Car, Circuits 834 and 835 Crown Victoria/Grand Marquis for activity. To pass the manual test the control module must detect that all four doors have been opened and closed, and that the steering wheel has been turned at least 1/4 turn in each direction. After the manual test, the STAR tester button must be toggled, or the control module will continue to monitor the manual test inputs indefinitely. Either a DTC 11 (Air suspension OK) or other DTCs will be displayed at this time.

After the Auto/Manual tests, the DTCs will be displayed automatically. Each DTC detected will be displayed for about 15 seconds. The code display will continue until all DTCs have been displayed. The display will repeat the DTC until the STAR test button is released (up). After all DTCs are written down, the pressed tester button may be released. DO NOT disconnect or turn OFF the tester. After this, the tester is ready to enter the Functional Test.

Lets get started

Remove all extra loads from luggage and passenger compartments.
Set STAR Tester as follows: STAR: EEC/MCU Setting
SUPER STAR II: EEC/MCU Setting, FAST codes

Turn ignition switch OFF.
Turn air suspension switch (RH side of luggage compartment) OFF, then ON.
Remove RH luggage compartment trim panel.
Connect STAR Tester to data link connector.
NOTE: Ensure STAR test button is in HOLD (up) position before connecting to vehicle.

Start engine. If engine cannot be started, connect battery charger to maintain battery level and turn ignition switch to RUN.
Wait at least two seconds, then press STAR Tester button so it remains in the TEST (down) position.
Within 20 seconds, a DTC 10 should be displayed.


DTC 10 will be displayed for up to two minutes.
DO NOT put any weight on vehicle while DTC 10 is displayed.
When Auto Test is complete a DTC 12 (Auto Test passed) or DTC 13 (Auto Test failed) will be displayed.
With DTC 12 or 13 displayed:
Open and close all four doors sequentially.
Turn steering wheel 1/4 turn in both directions.

NOTE: The above manual inputs can be done in any sequence.

Release STAR TEST button to HOLD (up) position.
Wait two seconds and press button to TEST (down) position.
Within 20 seconds DTCs will be displayed

NOTE: The DTCs will be displayed for about 15 seconds each. After all DTCs have been displayed, the DTCs will be repeated. The DTCs will continue to repeat as long as the STAR tester button is in the TEST (down) position.

FUNCTIONAL TESTS

NOTE: Using the function test feature allows you to test a single part of the system. In other words, if you had a problem with the vent solenoid circuit somewhere, you could have the vent solenoid continuously turned off and on in order for you to check it while it was working.

23=VENT REAR
26=COMPRESS REAR
31=TOGGLE COMPRESSOR ON & OFF REPEATEDLY
32=TOGGLE VENT SOLENOID ON & OFF REPEATEDLY
33=TOGGLE AIR SPRING SOLENOIDS ON & OFF REPEATEDLY

TOWN CAR SUSPENSION CODES

10=Diagnostics entered, auto test in progress
11=vehicle passes
12=auto test passed, perform manual inputs
13=auto test failed, perform manual inputs
15=no drive cycle errors detected
16=EVO diagnostic trouble code(electronic variable orifice)
17-EVO diagnostic trouble code
18=EVO diagnostic code
23=Function test, vent rear
26=function test, compress rear
28=steering wheel switch not detected (town car only)
31=function test, air compressor relay toggle
32=function test, vent solenoid toggle
33=function test, air spring solenoid toggle
35=ERASE CODES IN MEMORY
39=compressor relay control circuit short to ground
40=compressor or relay control circuit short to ground
42=air spring solenoid short to ground
43=air spring solenoid short to battery
44=vent solenoid short to battery
45=short in vent solenoid circuit
46=air suspension height sensor supply circuit shorted
51=unable to detect lowering of rear
54=unable to detect raising of rear
68=short in rear height sensor circuit
70=replace control module
71=height sensor open circuit
72=did not detect 4 open & closed door signals
74=EVO diagnostic trouble code
80=control module detects low battery voltage


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