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Ride height specification for 2002 Bravada and procedure on replacing sensors.Or where can I look on line for this information.


Air Suspension ??????

Air Suspension Description and Operation
Air Suspension
The primary mission of the Air Suspension System is the following for the rear suspension under loaded and unloaded conditions:
• Keep the vehicle visually level
• Provide optimal headlight aiming
• Maintain optimal ride height
The Air Suspension System consists of the following items:
• Air suspension compressor assembly
• Air suspension sensors
• Rear air springs
Important: The Air Suspension System must have a voltage supply of at least 12.6V to operate properly.
The Air Suspension System will maintain the rear D height within 4 mm (0.15 in) in all loading conditions and the leveling function will deactivate if the vehicle is overloaded. The side to side D height variation is maintained within 8 mm (0.31 in). After ignition is turned off, the air suspension control module (ASCM) will remain active for between 30 minutes and 2 1/2 hours. The system will exhaust pressure within 30 minutes after the ignition is turned off to lower the vehicle after unloading. In a temperature-controlled environment, the leakage of the complete load leveling system will not result in more than 1.4 mm (0.05 in) drop of rear suspension height at GVWR during a 24 hour period. If the outdoor temperature drops from +20°C (+68°F) to -5°C (+23°F), the rear D height may drop as much as 25 mm (1 in). However, the Air Suspension System should return to the specified D height when the ignition is again cycled to ON.

What is the problem ?

Diagnostic Trouble Code (DTC) Displaying
The Air Suspension system has an internal clock to prevent overheating if the compressor assembly is running for a prolonged period of time. If the system overheats, all leveling function stops until the system cools down. During this time, the indicator LED on the air inflator switch will be quickly flashing at a constant rate.
The other three diagnostic trouble codes are displayed with a blink code on the inflator switch LED. The Air Suspension Compressor Assembly shall begin to indicate the code when the condition to cause the code becomes current.
The number of the fault code shall be represented by the number of flashing pulses on the inflator switch LED. The flashing pulses shall have a repetition rate of 0.5 seconds and each code shall be separated by a 3.0 second delay. All codes shall be flashed in the order of occurrence of the fault. The blink code shall take priority over other processes that have access to the inflator switch LED. Refer to the following:
• DTC 001
• DTC 002
• DTC 003

Trim Height Uneven or Low ??????

Feb 24, 2017 | Cars & Trucks

1 Answer

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


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 .

Nov 06, 2015 | 2002 Lincoln Navigator

2 Answers

On a 2004 Lincoln Navigator the check air suspension light came on. there are no leaks on the lines but the car bounces on the smallest of bumps. Is there a relay or something that has gone bad?


There is a relay an there is a control module that controls everything in the air suspension system an ride height sensors an related wiring ! The control module can have diagnostic trouble codes stored in it's memory as to what the problem could be ! Here are some of the basics to check !
Inspection and Verification
  1. Verify the customer concern.
  1. NOTE: If the door ajar indicator is illuminated when all doors, liftgate, and liftgate glass are closed, the air suspension will not work correctly. Repair door ajar indicator; refer to Section 413-01 . Visually inspect for obvious signs of mechanical and electrical damage.


Visual Inspection Chart Mechanical Electrical
  • Restricted suspension movement
  • Excessive vehicle load
  • Cut, severed, crimped air line(s)
  • Unmounted height sensor(s)
  • Damaged front air spring(s)
  • Damaged rear air spring(s)
  • Central junction box (CJB) fuses 11 (10) (later built vehicles), 20 (30A), fuse 27 (5A), and fuse 111 (50A)
  • Loose, corroded, or disconnected connectors
  • Air suspension service switch is in the OFF position
  • Damaged solenoid valve(s)/height sensor(s)
  1. If the inspection reveals an obvious concern that can be readily repaired, correct the concern before continuing with Inspection and Verification.
  1. NOTE: The 4WAS module is also referred to as the Vehicle Dynamic Module (VDM). If the concern remains after the inspection, use the scan tool connected to the data link connector (DLC) to retrieve continuous diagnostic trouble codes (DTCs) and to execute On-Demand Self Test diagnostics for the 4WAS module.
    • If the On-Demand Self Test is passed and no DTCs are retrieved, GO to Symptom Chart to continue diagnostics.
    • If DTCs are retrieved, go to the 4WAS Module Diagnostic Trouble Code (DTC) Index in this section.
    • If the 4WAS module cannot be accessed by the scan tool, Go To Pinpoint Test A .
Wheel Air Suspension (4WAS) Module Diagnostic Trouble Code (DTC) Index NOTE: Repair all other DTCs before C1725 and C1726. Repair DTCs C1990 and C1991 last. DTCs Description Source Action B1317 Battery voltage high 4WAS module Go To Pinpoint Test C . B1318 Battery voltage low 4WAS module Go To Pinpoint Test C . B1342 ECU is defective 4WAS module INSTALL a new 4WAS module. REFER to Air Suspension Control Module . SET the ride height. REFER to Ride Height Adjustments . CARRY OUT the pneumatic test. TEST the system for normal operation. B1566 Door circuit failure 4WAS module REFER to the Symptom Chart. B2477 VAPS II steering assist curve not complete 4WAS module REFER to Section 211-00 . C1445 Vehicle speed signal circuit failure 4WAS module GO to Symptom Chart . C1724 Air suspension height sensor power circuit failure 4WAS module Go To Pinpoint Test D . C1725 Air suspension front pneumatic failure 4WAS module Go To Pinpoint Test E . C1726 Air suspension rear pneumatic failure 4WAS module Go To Pinpoint Test E . C1760 Air suspension rear height sensor signal circuit failure 4WAS module Go To Pinpoint Test F . C1770 Air suspension vent solenoid output circuit failure 4WAS module Go To Pinpoint Test G . C1790 Air suspension LR air spring/shock solenoid output circuit failure 4WAS module Go To Pinpoint Test H . C1795 Air suspension RR air spring/shock solenoid output circuit failure 4WAS module Go To Pinpoint Test H . C1830 Air suspension compressor relay circuit failure 4WAS module Go To Pinpoint Test I . C1840 Air suspension disable switch circuit failure 4WAS module Go To Pinpoint Test J . C1873 Air suspension RF air spring solenoid output circuit failure 4WAS module Go To Pinpoint Test H . C1877 Air suspension LF air spring solenoid output circuit failure 4WAS module Go To Pinpoint Test H . C1881 Air suspension RF height sensor circuit failure 4WAS module Go To Pinpoint Test F . C1889 Air suspension LF height sensor circuit failure 4WAS module Go To Pinpoint Test F . C1897 Steering VAPS circuit loop failure 4WAS module REFER to Section 211-00 . U1950 UBP communication bus fault 4WAS module REFER to Section 418-00 . C1964 Air suspension compressor actual run time exceeded allowed run time 4WAS module Allow the air compressor to cool down. CLEAR the DTC. REPEAT the self-test. C1990 New control module initialization (requires ride height calibration and pneumatic test pass) 4WAS module REFER to "Clearing DTC C1990 or C1991". C1991 Plant ride height setting and/or tests incomplete 4WAS module REFER to "Clearing DTC C1990 or C1991". U2235 4x4 mode status invalid 4x4 control module REFER to Section 418-00 . U2306 Transmission PRNDL indicator or vehicle speed signal invalid Instrument Cluster (IC) REFER to Section 418-00 . This is a very complex system ,you need a factory scan tool or one that is equal to it ! It could be a fuse a wiring issue a sensor or the module , relay etc... You may want to take this to a ASE repair facility or the dealer !

Aug 05, 2015 | 2004 Lincoln Navigator Luxury

1 Answer

Why mb s430 codepo171


this indicates the air/fuel miture is running lean ,to much air , so check all pipe work to and from air intake/fuel injector system it could also be the MAF sensor so clean this with some brake cleaner

Apr 29, 2014 | Cars & Trucks

1 Answer

2001 Lincoln towncar signature....PROBLEM:power door locks-trunk release-driver side power seat-keyless outer door entry-radio&clock......when weather is hot, door locks-trunk release-power seat-keyless...


What mechanics ? No codes stored in driver door module or power seat module ? Or don't these mechanics know about that ?
Did you try the dealer ?
Diagnostic Trouble Code (DTC) Chart DTC Description Source Action B1201 Fuel Sender Circuit Failure HEC Module REFER to Section 413-01 . B1204 Fuel Sender Circuit Short to Ground HEC Module REFER to Section 413-01 . B1205 Failure (Open or Short to Battery) HEC Module REFER to Section 413-08 . B1208 HEC Switch-1 Assembly Circuit Short to Ground HEC Module REFER to Section 413-08 . B1213 PATS Number of Programmed Keys is Below Minimum HEC Module REFER to Section 419-01 . B1231 Longitudinal Acceleration Threshold Exceeded RCM REFER to Section 501-20B . B1232 PATS Bad Diagnostic Byte Received HEC Module REFER to Section 419-01 . B1249 Blend Door Failure EATC Module REFER to Section 412-00 . B1251 Climate Control Air Temperature Internal Sensor Circuit Open EATC Module REFER to Section 412-00 . B1253 Climate Control Air Temperature Internal Sensor Circuit Short to Ground EATC Module REFER to Section 412-00 . B1255 Climate Control Air Temperature External Sensor Circuit Short to Battery EATC Module REFER to Section 412-00 . B1257 Climate Control Air Temperature External Sensor Circuit Short to Ground EATC Module REFER to Section 412-00 . B1261 Climate Control Solar Radiation Sensor Circuit Short to Ground EATC Module REFER to Section 412-00 . B1312 Headlamp Input Circuit Short to Battery LCM REFER to Section 417-01 . B1317 Battery Voltage High HEC Module REFER to Section 414-00 . B1317 Battery Voltage High RCM REFER to Section 414-00 . B1317 Battery Voltage High Air Suspension Module REFER to Section 204-05 . B1318 Battery Voltage Low HEC Module REFER to Section 414-00 . B1318 Low Ignition Voltage During Speed Control Operation NGSC Module REFER to Section 310-03 . B1318 Battery Voltage Low Air Suspension Module REFER to Section 204-05 . B1318 Battery Voltage Low RCM REFER to Section 414-00 . B1322 Door Ajar LF Short to Ground DDM REFER to Section 501-14B . B1334 Decklid Ajar Rear Door Circuit Short to Ground LCM REFER to Section 501-14B . B1340 Chime Input Request Circuit Short to Ground LCM REFER to Section 501-20B . B1342 ECU is Defective ABS Module CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new ABS Module. REFER to Section 206-09 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective ACM CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new ACM. REFER to Section 415-01 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective CPM CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new CPM. REFER to Section 419-08 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective DDM CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new DDM. REFER to Section 419-10 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective DSM CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new DSM. REFER to Section 419-10 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective HEC Module CLEAR and DOCUMENT the DTCs. PERFORM the HEC self-test. If DTC B1342 is retrieved, INSTALL a new HEC Module. REFER to Section 413-01 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective LCM CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new LCM. REFER to Module-Lighting Control (LCM) in this section. CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective NGSC Module CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new NGSC Module. REFER to Section 310-03 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective Air Suspension Module CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new air suspension module. REFER to Module-Air Suspension in this section. CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective RCM REFER to Section 501-20B . B1352 Ignition Key-In Circuit Failure LCM REFER to Section 413-09 . B1359 Ignition RUN/ACCY Circuit Failure LCM REFER to Section 211-05 . B1396 Power Door Lock Circuit Short to Battery DDM REFER to Section 501-14B . B1397 Power Door Unlock Circuit Short to Battery DDM REFER to Section 501-14B . B1402 Driver Power Window Down Circuit Failure DDM REFER to Section 501-11 . B1445 Door Handle Circuit Short to Ground DDM REFER to Section 501-14B . B1446 Wiper PARK Sense Circuit Failure LCM REFER to Section 501-16 . B1484 Brake Pedal Input Open Circuit ABS Module REFER to Section 206-09 . B1485 Brake Pedal Input Circuit Short to Battery LCM REFER to Section 417-01 . B1526 Keyless Entry Circuit Short to Ground DDM REFER to Section 501-14B . B1529 Memory Set Switch Circuit Short to Battery DDM REFER to Section 501-09 . B1533 Memory Position No. 1 Switch Circuit Short to Battery DDM REFER to Section 501-09 . B1537 Memory Position No. 2 Switch Circuit Short to Battery DDM REFER to Section 501-09 . B1545 Seat Direction Switch Assembly Circuit Short to Battery DDM REFER to Section 501-10 . B1549 Power Window Master Circuit Short to Battery DDM REFER to Section 501-11 . B1553 Decklid Release Circuit Short To Battery DDM REFER to Section 501-14B . B1555 RUN/START Input Circuit Failure LCM REFER to Section 211-05 . B1556 RF, LR, RR Door Ajar Circuits Short to Ground DDM REFER to Section 501-14B . B1569 Headlamp High Beam Circuit Short to Battery LCM REFER to Section 417-01 . B1577 Parking Lamp Input Short to Battery LCM REFER to Section 417-01 . B1581 Panel Dim Increase Input Circuit Short to Battery LCM REFER to Section 413-00 . B1585 Panel Dim Decrease Input Circuit Short to Ground LCM REFER to Section 413-00 . B1600 PATS Key Problem - No Key Code HEC Module REFER to Section 419-01 . B1601 PATS Received Non-Programmed Key Code HEC Module REFER to Section 419-01 . B1602 PATS Received Invalid Key Code Format HEC Module REFER to Section 419-01 . B1663 Driver Seat Front Up/Down Motor Stalled DSM REFER to Section 501-10 . B1664 Driver Seat Rear Up/Down Motor Stalled DSM REFER to Section 501-10 . B1665 Driver Seat Forward Backward Motor Stalled DSM REFER to Section 501-10 . B1666 Driver Seat Fwd/Bwd Recline Motor Stalled DSM REFER to Section 501-10 .
Also do there know anything about serial data bus ?
Plus , do they know what voltage drop testing a electrical circuit is . I should find better mechanics .

May 31, 2017 | Cars & Trucks

2 Answers

Mercedes s430 2000 i constantly get message airmatic go to workshop , front right suspension seems to be faulty , can it be fixed or does it need to be changed ?


It will have to be tested at a dealership. It is most likely the strut assembly, but occasionally the air pumps go bad.

Jan 27, 2013 | 2000 Mercedes-Benz S-Class

1 Answer

I need to change the rear breaks on my navigator i need to find the air suspension turn off switch


It's in your owner manual. Year?

SECTION 204-05A: Vehicle Dynamic Suspension - Rear 2002 Expedition/Navigator Workshop Manual
REMOVAL AND INSTALLATION Switch -Air Suspension Removal and Installation
  1. Disconnect the battery ground cable. For additional information, refer to Section 414-00 .
  1. NOTE: The air suspension switch and bracket is mounted below the RH side of the instrument panel.
    Disconnect the electrical connector and detach the air suspension switch from the bracket.

Mar 28, 2011 | Lincoln Navigator Cars & Trucks

1 Answer

1999 Towncar - Air suspension shocks in good condition and car rides level - no idicator light is on. The car just rides way too stiff. Even the slightest bump jolts the inside (rattles change in ash...


I will check the shop manual, but the module does control ride for stiffness, increased stiffness at higher speeds, etc. If the bags are inflated, then the module cintrols how much air to allow in or out based on inputs to the module. See if you can get one from a salvage yard form a cash for clunkers car.

A dealer can run a test for fault codes in the computer. Call and ask how much for just a scan for fault codes in the air suspension module.

-----------------------------
Vehicle Dynamic Suspension The vehicle dynamic suspension consists of the following components:
  • Rear air suspension control (RAS) module (5A919)
  • Snorkel
  • Drier
  • Air compressor (5319)
  • Air suspension switch (5K761)
  • Solenoid valve (5311)
  • Air spring (5560)
  • Air suspension height sensor (5359)
  • Air line
----------------------------------------------------------------------------
Rear Air Suspension Control Module
A microprocessor controls the air suspension system. The microprocessor and its supporting hardware are contained in the rear air suspension control module. The rear air suspension control module responds to signals from various sensors in the vehicle to maintain the programmed ride height while the vehicle is either moving or stopped. The rear air suspension control module accomplishes this by opening and closing solenoid valves to control the amount of air in the air spring(s). The rear air suspension control module turns on the compressor by applying voltage through the compressor relay to inflate the air spring(s) and raise the vehicle. The rear air suspension control module opens the vent solenoid to lower the vehicle by releasing air from the air spring(s) in response to signal inputs from the air suspension height sensor(s).
Air Suspension Switch
sxg~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: The air suspension switch must be turned to the OFF position when the vehicle is hoisted, jacked, towed, jump started, or raised off the ground, to avoid unnecessary operation of the system and possible damage to the air suspension system components.
The air suspension switch provides a signal to the rear air suspension control module in the ON position to activate the system to maintain the programmed vehicle height.
Air Compressor
NOTE: The compressor contains a thermal overload circuit breaker. The circuit breaker automatically resets after a cool down period and after being tripped by excessive compressor motor heat.
The air compressor assembly consists of the compressor pump, electric motor and vent solenoid (must be installed as an assembly).
Air Suspension Height Sensor
The air suspension height sensor sends signals to the air suspension control module. There are three possible conditions that the air suspension control module interprets from the signals of the air suspension height sensors. The conditions are trim height, below trim height, or above trim height.
Solenoid Valve, Air Spring
sxg~us~en~file=ani_caut.gif~gen~ref.gif WARNING: Never rotate an air spring solenoid valve to the release slot in the air spring end cap fitting until all pressurized air has escaped from the air spring to prevent vehicle damage or personal injury.
The air spring solenoid valve allows air to enter and exit the rear air springs during height adjustment operations. The air spring solenoid valve is electrically operated and controlled by the air suspension control module.
Steering Sensor
The steering sensor provides the steering rate and position to the air suspension control module to avoid overcompensation of the air suspension during turns.
Inspection and Verification
  1. Verify the customer concern.
  1. NOTE: If the door ajar indicator is illuminated, repair the door ajar indicator. For additional information, refer to Section 413-09 .
    Visually inspect for obvious signs of mechanical and electrical damage.


Visual Inspection Chart Mechanical Electrical
  • Restricted suspension movement
  • Excessive vehicle load
  • Cut, severed or crimped air line(s)
  • Incorrectly mounted, damaged or disconnected height sensor
  • Damaged air spring(s)
  • Central junction box (CJB) Fuse:
    • 8 (10A)
    • 17 (10A)
  • Battery junction box (BJB) Fuse 12 (30A)
  • Loose or corroded connectors
  • Air suspension switch
  • Damaged air spring solenoid(s)


  1. If the concern remains after the inspection, connect New Generation STAR (NGS) Tester to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the NGS Tester menu. If NGS Tester does not communicate with the vehicle:
    • check that the program card is properly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
  1. If the NGS still does not communicate with the vehicle, refer to the New Generation STAR Tester manual.
  1. Carry out the DATA LINK DIAGNOSTIC TEST. If NGS Tester responds with:
    • CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP. Refer to Section 418-00 .
    • NO RESP/NOT EQUIP for rear air suspension control module, go to Pinpoint Test A.
    • SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and perform self-test diagnostics for the rear air suspension control module.
  1. If the DTCs retrieved are related to the concern, go to Rear Air Suspension Control Module Diagnostic Trouble Code (DTC) Index to continue diagnostics.
  1. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics.
Rear Air Suspension Control Module Diagnostic Trouble Code (DTC) Index
NOTE: If rear air suspension control module C251 is disconnected before rear air suspension control module C250, DTCs C1830, C1770, C1790 and C1795 will be retrieved and must be cleared before an accurate list of continuous DTCs can be retrieved. The DTCs C1441 and C1442 will only be retrieved when running the electronic variable orifice (EVO) functional test on NGS Tester. The DTC C1897 will only be retrieved once per ignition switch cycle.

-----------------------------------------------------------------------------------
Module —Air Suspension Control Removal
sxg~us~en~file=ani_caut.gif~gen~ref.gif WARNING: Before performing maintenance on any air suspension components, disconnect the power to the system by turning off the air suspension switch located on the LH side of the luggage compartment to prevent vehicle damage or personal injury.
sxg~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage may result.
  1. Turn the air suspension switch off.
  1. Disconnect the battery ground cable (14301).
  1. Pull out the lower instrument panel insulator.
    1. Remove the pushpins.
    1. Pull out the lower instrument panel insulator.
  1. Remove the lower instrument panel insulator.
    1. Disconnect the power point.
    1. Disconnect the courtesy lamp.
    1. Remove the lower instrument panel insulator.
  1. Remove the rear air suspension control module.
    1. Remove the screws.
    1. Disconnect the electrical connectors.
    1. Remove the rear air suspension control module.
Installation
  1. NOTE: When the battery is disconnected and reconnected, some abnormal drive symptoms may occur while the vehicle relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 mi) or more to relearn the strategy.
    To install, reverse the removal procedure.

Jan 20, 2010 | Lincoln Town Car Cars & Trucks

1 Answer

Where can i get a copy of the parts that make up the air suspesion of my 2001 grand marquis. sometime it works and other time it will not.


Vehicle Dynamic Suspension The vehicle dynamic suspension consists of the following components:
  • Rear air suspension control (RAS) module (5A919)
  • Snorkel
  • Drier
  • Air compressor (5319)
  • Air suspension switch (5K761)
  • Solenoid valve (5311)
  • Air spring (5560)
  • Air suspension height sensor (5359)
  • Air line
------------------------------------------------
Visual Inspection Chart Mechanical Electrical
  • Restricted suspension movement
  • Excessive vehicle load
  • Cut, severed, or crimped air line(s)
  • Damaged air spring(s)
  • Height sensor damage
  • Height sensor mounted incorrectly, disconnected, or damaged
  • Central junction box (CJB):
    • Fuse 5 (15A)
  • Battery junction box (BJB):
    • Fuse 8 (30A)
  • Loose or corroded connectors
  • Air suspension switch OFF


The air suspension control module is diagnosed using Super Star II Tester 418-F045 (007-0041B) or equivalent.
The test connector used to communicate with the air suspension control module is located on the RH side of the luggage compartment.
When the tester is connected, the engine is started and the HOLD/TEST button is latched down, the air suspension control module will respond sending a code 10 to the Super Star II Tester which represents "Diagnostics mode entered." If diagnostic trouble code (DTC) 10 is not displayed, go to Pinpoint Test A.
Air Suspension Control Module Diagnostic Trouble Code (DTC) Index
Condition Possible Sources Action
  • No communication with the air suspension control module
  • CJB Fuse 5 (15A).
  • BJB Fuse 8 (30A).
  • Circuitry.
  • Air suspension control module.
  • GO to Pinpoint Test A .
  • Unable to enter auto test
  • Air suspension control module.
  • Circuitry.
  • GO to Pinpoint Test B .
  • Rear air suspension does not respond to load changes
  • Circuitry.
  • Air compressor.
  • Air compressor inlet tube.
  • Air compressor drier.
  • Air suspension height sensor.
  • Air suspension control module.
  • GO to Pinpoint Test C .
  • Rear rides low/high
  • Circuitry.
  • Air spring solenoid.
  • Air suspension height sensor.
  • Air suspension control module.
  • GO to Pinpoint Test C .
  • Poor ride quality
  • Circuitry.
  • Air springs.
  • GO to Pinpoint Test C .
  • Air suspension warning indicator ON
  • Air suspension switch OFF.
  • Place the air suspension switch in the ON position.
  • Air suspension control module.
  • Circuitry.
  • GO to Auto Test.
  • Instrument cluster (conventional cluster) or lamp warning module (electronic cluster).
  • REFER to Section 413-01A (conventional cluster) or REFER to Section 413-01B (electronic cluster), or REFER to Section 413-01C (natural gas cluster).


Sep 25, 2009 | 2001 Mercury Grand Marquis

1 Answer

Check suspension light is on


Remove the dash and remove the bulb.

Feb 16, 2009 | Lincoln Navigator L Cars & Trucks

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