Question about 2002 Cadillac Deville

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Suspension LF and RT Front Shock Codes In Computer Live Data Showing Everything ok

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  • Jerry Collins
    Jerry Collins May 20, 2009

    Shocks are ok cleared codes put car in drive and short distance lights up service suspension in dash

  • Jerry Collins
    Jerry Collins May 20, 2009

    Yes there is codes for both sides

  • Jerry Collins
    Jerry Collins May 20, 2009

    Vehicle left shop will be back tomorrow will tell you then if thats ok Thanks for Your Time Jerry @ Southern Speed

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  • Master
  • 355 Answers

Can you described little more about your problem?

Posted on May 20, 2009

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  • Rohit  Asthana
    Rohit Asthana May 20, 2009

    still i am not getting your problem ? is there problem in code of LF and RT front...please
    discribe liitle bit more

  • Rohit  Asthana
    Rohit Asthana May 20, 2009

    what is code no is prompting?

  • Rohit  Asthana
    Rohit Asthana May 20, 2009

    oki no problem i will wait

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2007 ford sport trac at high speeds it feels like my front end is walking all over the road but no shimmy in my steering wheel and goes straight tires look ok rotated tires problem still there.


could be from worn tie rod ends, suspension ball joints , worn suspension rubbers and failing shock absorbers
take it to an accredited suspension service center for a complete check including the rear end as the front floating sensation could be from a problem rear end suspension set up and shock absorbers
I am well aware that every tire shop says rotate tires but in reality you just move a problem tire from one corner to the other, fail to see a wear problem develop in the tires ( indicates alignment or tire case problem) and costs 4 tires at a time instead of 2 which is not really economical as well
consider this front drive cars wear out front tires at the rate of 3 to rear tires 1 and I think you get the picture (rear drive cars rear tires 2 to front 1) or if there is a case problem with a tire it is lost in the rotation process and becomes dangerous on the road

Aug 08, 2016 | Ford Cars & Trucks

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

I live in south Fl, and when the temp goes below 65 a message appears Air suspension fault and the ride is very bumpy. When it warms up, it rides fine! Whats up?? Thank-you!


the only thing will cause the fault light to come on is the pressure in the retention tank located in the trunk underneath the spare tire...,once the pressure drops,then the suspension pump relay makes the pump refil the tank...the cause of this is usually a leaking shock...normally they will leak around the upper caping...one sign is that the car will be lower overnite then normal or if it sits for a long period.if the front is lower then its a front shock..the bumpy ride is the fault system lowering the car from the leak while your riding..

Dec 01, 2011 | 2006 Jaguar XJ8

1 Answer

2003 Cadillac Deville DTS CODES co579 and co584


Those codes are for the suspension in the front.
C0579 is LF Solenoid/Motor/Actuator Circuit Open
C0584 is RF Solenoid/Motor/Actuator Circuit Open

I would suspect that either the solenoid motors are bad or the wiring to them is damaged.

Mar 29, 2011 | 2002 Cadillac Deville

1 Answer

I have a 1994 lincoln continental car. Hoe do I replace the suspention drier?


why do you want to replace it? As air is exhausted through it, it dires it out for the next use. it's part of compressor assembly.

1996 cont'l The air suspension system includes the following major components:
  • Air compressor to supply air to the air springs (part of front spring and shock and rear spring and shock absorber assemblies
  • Front spring and shock (3C098) and rear spring and shock absorber (5A965) at each corner of the vehicle
  • Four linear air suspension height sensors (5359): two rear and two front height sensors to maintain the vehicle at the proper ride height; only LH rear height sensor is used for air suspension.
  • Dual-mode front spring and shock and rear shock absorber assemblies with internal actuator.
All system functions are controlled by vehicle dynamics control module (5A919). This control module receives inputs from several different sources. These inputs include:
  • vehicle speed via multiplex communication network
  • ignition switch position
  • door position via multiplex communication network
  • height sensor position
  • air suspension service switch
  • engine rpm via multiplex communication network
  • ride and steering personality settings via multiplex communications network
Communications monitor system operation and allow diagnosis of any concerns that may develop in the system. System monitoring for the driver's use is provided through the instrument panel mounted message center indicator (10D898).
  • Diagnosis communication for the service technician is provided through the data link connector (14489) (DLC) under the instrument panel and Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent.
The message center indicator will display AIR LEVELING DISABLED or CHECK RIDE CONTROL if the suspension system is not turned on or the vehicle dynamics control module detects a concern. If air leveling system disabled is displayed, check that air suspension service switch is in the ON position.
----------------------------------------------------------
Solenoid Valve Vent The vent solenoid valve operates as follows:
  • The vent solenoid valve allows air to escape from the system during venting corrections.
  • The valve is located in the air compressor cylinder head and shares a common electrical connector with the motor.
  • The valve is enclosed in the cylinder head casting, which forms an integral valve housing that allows the valve tip to enter the pressurized side of the system.
  • Air leakage past the valve tip is prevented by an O-ring seal.
  • The vent solenoid valve opens when a corner of the vehicle is high and the vehicle dynamics control module (5A919) determines lowering is required.
  • When the vent solenoid valve is opened, it provides an escape route for pressurized air.
  • However, the vehicle will not lower unless the air spring solenoid valves (5311) are also opened to allow air to leave the springs.
  • Lowering the vehicle corners requires the vehicle dynamics control module to open two solenoid valves, the vent and one air spring solenoid.
  • Air is exhausted from the spring and vents through the compressor air drier (5346).
---------------------------------------------------------------------------------------------
Section 04-05: Suspension, Computer Controlled 1996 Continental Workshop Manual
REMOVAL AND INSTALLATION Air Compressor and Drier Assembly Removal
  1. Turn air suspension service switch OFF.
  1. Disconnect electrical connector located on the air compressor.
  1. Disconnect two air lines from compressor air drier.
  1. Remove three fasteners retaining air compressor and drier assembly to radiator support, frame rail and fender apron.

Dec 22, 2009 | 1994 Lincoln Continental

1 Answer

REPLACED DRYER ON 96 CONT NOW THE BACK WONT AIR UP FRONT DOES


maybe you got dirt in the line to the rear. Here's some background info:

The air suspension system includes the following major components:
  • Air compressor to supply air to the air springs (part of front spring and shock and rear spring and shock absorber assemblies
  • Front spring and shock (3C098) and rear spring and shock absorber (5A965) at each corner of the vehicle
  • Four linear air suspension height sensors (5359): two rear and two front height sensors to maintain the vehicle at the proper ride height; only LH rear height sensor is used for air suspension.
  • Dual-mode front spring and shock and rear shock absorber assemblies with internal actuator.
All system functions are controlled by vehicle dynamics control module (5A919). This control module receives inputs from several different sources. These inputs include:
  • vehicle speed via multiplex communication network
  • ignition switch position
  • door position via multiplex communication network
  • height sensor position
  • air suspension service switch
  • engine rpm via multiplex communication network
  • ride and steering personality settings via multiplex communications network
Communications monitor system operation and allow diagnosis of any concerns that may develop in the system.
  • System monitoring for the driver's use is provided through the instrument panel mounted message center indicator (10D898).
  • Diagnosis communication for the service technician is provided through the data link connector (14489) (DLC) under the instrument panel and Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent.
The message center indicator will display AIR LEVELING DISABLED or CHECK RIDE CONTROL if the suspension system is not turned on or the vehicle dynamics control module detects a concern. If air leveling system disabled is displayed, check that air suspension service switch is in the ON position.
-------------------------------------------------------
Weight Added When weight is added to the vehicle, the air suspension system responds as follows:
  • Air suspension height sensor length is reduced from trim length, sending a "vehicle is low" signal to the vehicle dynamics control module (5A919).
  • To restore vehicle to the trim position, the vehicle dynamics control module turns the compressor on by grounding the compressor relay control Circuit 420 (DB/Y). The relay is ground-side switched.
  • To allow pressurized air to enter the rear spring (5560) and front spring and shock (3C098), the control module opens the solenoid valves (5311).
  • Compressed air flows from the compressor, through the compressor air drier assembly, air lines and solenoid valves into the air springs.
  • As the air springs raise the body height, the air suspension height sensor (5359) increases in length until the preset trim height is reached.
  • The vehicle dynamics control module then turns off the compressor (through the relay) and closes the air spring solenoid valves.
  • ----------------------------------------------------------------------------
  • Weight Removed When weight is removed, the air suspension system responds as follows:
    • Air suspension height sensor length is increased from the trim length, sending a "vehicle is high" signal to the control module (5A919).
    • To restore the vehicle to the trim position, the vehicle dynamics control module opens the vent solenoid valve (located in the compressor assembly) and opens the solenoid valves (5311).
    • Compressed air flows from air springs, through the solenoid valves, air lines, compressor air drier (5346) and out the vent solenoid valve.
    • As the body lowers, the air suspension height sensor length decreases until the preset trim height is reached.
    • The vehicle dynamics control module then closes the vent and solenoid valves.
------------------------------------------------------------------------------
Control Module Power and Ground The vehicle dynamics control module (5A919) is located above the upper luggage compartment trim panel and lower module tray. Module power is provided by Circuit 418 (DG/Y) at Pins 36, 37, 56, 57, 58 and is powered through a Fuse 7 (30A) in power distribution box. Module ground is provided through control module wire harness Pins 6, 39, 40 and 60. The data link connector (14489) (DLC) is located in the passenger compartment under the instrument panel, 300 mm (12 inches) right of the steering column. This connector allows communications between the vehicle dynamics control module and either Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent or Rotunda Service Bay Diagnostics System (SBDS)® 001-00001 or equivalent. When the CHECK RIDE CONTROL message is displayed in the message center indicator (10D898), a system error has been detected by the vehicle dynamics control module and is stored in the control module. This diagnostic trouble code (DTC) will be retained for the next 80 ignition switch cycles. If there is no repeat of the same error during these 80 ignition switch cycles, the control module will erase the DTC. Because of this self-erasing memory, a customer may have had a concern "just a few days ago" that is not retrieved from memory when Diagnostic Test Mode (DTC) "Retrieve/Clear Continuous DTCs" is executed. This must be kept in mind if you must tell customer that no current concern has been found. When the vehicle dynamics control module detects a concern, the air suspension system is disabled for the current ignition cycle. If the condition causing the concern clears up during the current ignition switch cycle, the system will not reactivate. For example, if the customer has severely overloaded the luggage compartment, the system will not be able to trim the vehicle without exceeding the compressor run time. This will generate a DTC that disables the computer controlled suspension system. If the customer then drives the vehicle and unloads the luggage compartment without turning the ignition switch OFF, the system will not adjust for the new load. The customer will experience poor ride quality and the vehicle will not adjust trim.

May 20, 2009 | 1996 Lincoln Continental

2 Answers

TURN RT APPLY BRAKES ABS/TRAC OFF COMES ON


bad front bearing/abs sensor The sensor is part of the bearing,or the wires are bad so that when you steer it open circuts and thinks the wheel is stopped. need to read codes or use a scan tool with live data to see which wheel the computer thinks is stopping. then look at that wheel for problems

Apr 25, 2009 | 2002 Pontiac Grand Prix

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