Господа!
По просьбе одного соклубника смотрел подвеску. Обнаружил интересное ТСБ, по тем вопросам, которые неоднократно обсуждались и по C1990 & C1991.
В том числе по шуму и поведению после зимы , калибровке датчиков подъема, шуму и стукам сзади.
Думаю будет полезно.
Первое:
AIR SUSPENSION COMPRESSOR NOISE - DTC'S C1990 & C1991
TECHNICAL SERVICE BULLETIN
Reference Number(s): 03-13-2, Date of Issue: July 7, 2003
FORD: 2003 EXPEDITION
LINCOLN: 2003 NAVIGATOR
DESCRIPTION
SUSPENSION - AIR SUSPENSION SYSTEM OVERVIEW - DIAGNOSIS/SCAN TOOL INFORMATION DTC'S C1990 AND C1991 - COMPRESSOR NOISE
ELECTRICAL - AIR SUSPENSION SYSTEM OVERVIEW - DIAGNOSIS/SCAN TOOL INFORMATION DTC'S C1990 AND C1991 - COMPRESSOR NOISE
ISSUE
This article is being published as a diagnostic aid to supplement the existing Workshop Manual diagnostics (see items A through F under CONTENTS). This article will also address the proper procedure to clear Diagnostic Trouble Codes (DTC's) C1990 or C1991 from the Vehicle Dynamics Module (VDM)/4-Wheel Air Suspension Module (4WAS).
ACTION
Refer to the following diagnostic aid and Service Tips for complete air suspension overview and to help properly diagnose the system.
SERVICE INFORMATION
CONTENTS
A: Brief description of suspension operation
B: Diagnostic tools
C: Diagnosis of leaky air spring solenoids
D: Compressor noise
E: C1990 and C1991 DTC's
F: Compressor relay change - Vehicles built after February 3, 2003
A: AIR SUSPENSION SYSTEM OVERVIEW
Vehicle height is controlled by the 4-Wheel Air Suspension Module (4WAS) based on height sensor output voltages.
The Vehicle Dynamics Module (VDM) and the 4-Wheel Air Suspension Module (4WAS) are the same module. This was a naming convention change in mid-model year 2003.
Each air spring has a solenoid that must open to vent or compress.
The air suspension compressor has a vent solenoid that must open to vent the system.
The transition from trim height to kneel height or from kneel height to trim height takes approximately 30 to 45 seconds.
The front air springs are independently controlled. The rear air springs are always controlled as a pair.
The system will not operate with any doors open, with the liftgate open, with the liftgate glass open or with the power running boards extended.
The air suspension switch position is ignored above 15 mph. The air suspension will be active over 15 mph, regardless of the switch position.
Kneel Mode is defined as 25mm below Trim Mode.
Trim Mode is defined as normal driving height.
4X4 Off-Road Mode is engaged when the vehicle is in 4X4 Low at a speed of less than 19 MPH, and is defined as 25mm above trim height.
Height Sensor Operation
There are 3 height sensors - Left Front, Right Front, and Right Rear.
The sensor output ranges between 0.5 volts and 4.5 volts.
The Left Front and Right Front sensors are opposite in polarity.
The voltage output of the sensors decreases as the vehicle body rises and increases as the vehicle body lowers.
Ride Height Change Triggers
When the ignition key is in the "Run" position and the vehicle is shifted to either "Drive" or "Reverse", the ride height will change from Kneel to Trim.
When the ignition key is in the "Off" position and the doors are closed after being open, the ride height will change from Trim to Kneel.
When the vehicle is engaged into 4X4 LOW, the ride height will change to Off-Road.
B: DIAGNOSTIC TOOLS (NGS AND WDS)
The VDM/4WAS module communicates with the network via the UBP protocol. This communication protocol can occasionally result in slow communication with the New Generation Star (NGS) or Worldwide Diagnostic System (WDS) tools. This may make the diagnostic tools appear sluggish or appear to "lock up" occasionally during diagnostic use or idle periods. In order to minimize the likelihood of slow response or tool lock-up, the following is recommended:
Minimize the number of viewed PIDs as much as possible while using active commands or PID monitoring/data recording.
Take care to give the tool time to react, as responses may be slow.
NOTE: WDS SOFTWARE VERSIONS PRIOR TO B25 (RELEASE DATE MID-MAY 2003) DO NOT SUCCESSFULLY TEST THE AIR SUSPENSION SYSTEM. BE SURE THAT THE WDS IS UPDATED TO VERSION B25 OR LATER PRIOR TO PERFORMING AIR SUSPENSION DIAGNOSTICS. WDS VERSION B25 CAN BE USED FOR ALL DIAGNOSTIC AND SERVICE FUNCTIONS ON THE 4WAS MODULE.
NOTE: THE WDS MUST BE USED TO CLEAR A B2477 DTC IN A NAVIGATOR 4WAS MODULE.
NOTE: THE UBP CABLE (ROTUNDA 105-100) MUST BE USED WITH THE NGS TO COMMUNICATE WITH THE VDM/4WAS MODULE. (THE WDS DOES NOT REQUIRE A SPECIAL CABLE TO COMMUNICATE WITH THE VDM/4WAS MODULE.)
For NGS Classic software releases prior to August 2003, the NGS can be used for all diagnostic and service functions on the 4WAS module except for Module Configuration, which , downloads the VAPS curve and clears the B2477 code. The NGS can be used for ride height programming with the service (green) card version 11.2 or higher and the UBP cable.
For NGS+ software releases after August 2003, the NGS can be used for all diagnostic and service functions on the 4WAS module.
NOTE: DO NOT REPLACE THE VDM/4WAS CONTROL MODULE (3C142) SIMPLY BECAUSE THE ABOVE SYMPTOMS EXIST, SINCE THE CONTROL MODULE IS NOT THE CAUSE.
C: DIAGNOSIS OF INTERMITTENT AND/OR UNEXPECTED RIDE HEIGHT BEHAVIOR
Leaky air spring solenoids usually result in intermittent and/or unexpected ride height behavior. The vehicle may not have been driven long enough to set a pneumatic failure DTC (C1725 and/or C1726) in the VDM/4WAS module, and the warning message may or may not be turned on during system malfunction.
Leaky air spring solenoids do not leak to the atmosphere, but instead to the airlines within the system. Inability of the solenoids to stop air flow will usually be apparent immediately after they are commanded to close.
Some symptoms of leaky air spring solenoids are the following:
Front end low and rear end high.
One corner drops more than it should during a height change process or while vehicle is parked.
Rear end high and front end near or at normal height.
Front end low and rear end near or at normal height.
NOTE: ANY OF THE PREVIOUS ISSUES MAY BE INTERMITTENT IN OCCURRENCE.
NOTE: DO NOT RECALIBRATE RIDE HEIGHTS SIMPLY BECAUSE THE RIDE HEIGHTS APPEAR INCORRECT. INCORRECT RIDE HEIGHTS ARE ONLY A SYMPTOM OF A DIFFERENT SYSTEM PROBLEM AND DO NOT INDICATE A NEED FOR RIDE HEIGHT CALIBRATION. ALL RIDE HEIGHTS ARE 100% SET DURING VEHICLE MANUFACTURE AND WILL NOT CHANGE OVER TIME. RIDE HEIGHT CALIBRATION IS ONLY NEEDED WHEN A HEIGHT SENSOR OR AIR SUSPENSION CONTROL MODULE HAS BEEN REPLACED.
Diagnosis Steps:
Disconnect and remove the airline union at the midpoint of the right hand frame rail near the body mount. Pressure will be relieved in 3 to 5 seconds.
NOTE: WHEN THE SPRING SOLENOIDS ARE OPEN, THE VEHICLE WILL LOWER QUICKLY.
Verify that the air suspension solenoids close properly:
Using the NGS (or WDS Software version B25 or later), cycle each air spring solenoid (LF, RF, LR, RR) one at a time from open (on) to closed (off). Air should flow from the open air line when the solenoid is opened, and should stop when the solenoid is closed. After closing the solenoid, cap the open line with your thumb to see if the air continues to be released from the air spring. A buildup of pressure in the line (i.e., all spring solenoids are off and the compressor is not running) identifies a leaking solenoid(s). CYCLE EACH SOLENOID SEVERAL TIMES AS THE PROBLEM MAY BE INTERMITTENT.
Replace the leaking solenoid or solenoids with a revised part 2L1Z-5311-AA.
NOTE: WHEN REPLACING A LEAKING SOLENOID, CHECK THE SOLENOID DATE CODE ON THE SIDE OF THE NEW SOLENOID BODY. THE DATE CODE, SHOWN IN STAMPED LETTERS IN JULIAN FORMAT, SHOULD BE ON OR LATER THAN 0363. IF IT IS EARLIER THAN THIS DATE, THE SOLENOID IS SUSPECT AND SHOULD NOT BE USED ON THE VEHICLE.
Retest for leaky solenoids.
Road test the vehicle to ensure a robust repair.
D: COMPRESSOR NOISE
Excessive compressor noise can be caused by a loose compressor-to-body mounting, compressor ground-outs, or loose parts (bolts, nuts, etc.) on or underneath the compressor assembly. Compressor noise is NOT usually corrected by replacing the compressor assembly itself.
The compressor does make an audible noise that can be heard during cycling of the system. Normal operation is characterized by a moderate humming or buzzing sound from under the hood during compressor operation.
Perform the following actions before replacing any compressor for a noise complaint:
Check to make sure the three attachment bolts are securely fastened to the body (Fig. 1 ).
Make sure that no parts are trapped under or on the compressor bracket.
Make sure that the compressor motor assembly is not in contact with any surrounding component that could cause vibration noises.
Ensure that the compressor is free to move in its rubber mounting grommets. Make sure the compressor bracket has not been bent or deformed in any way that would load the rubber mounts against each other.
E: CLEARING C1990 AND C1991 DTCS
These codes must be cleared or the "Check Suspension" warning message will be turned on.
All service modules are built with the C1990 code. All assembly plant modules are built with the C1991 code. These codes can only be cleared using the following procedures.
C1990 and C1991 can be re-enabled in the control module by resetting the ride heights to their default value, or when the pneumatic test has failed. When either one of these DTC's are present, the air suspension warning will be enabled.
Clearing C1990 or C1991
NOTE: BEFORE PROCEEDING WITH THE FOLLOWING STEPS, ENSURE THAT THE SYSTEM IS FULLY FUNCTIONAL. THE VEHICLE MUST PASS THE PNEUMATIC TEST AND HAVE ALL THREE RIDE HEIGHT SENSORS CALIBRATED FOR THESE CODES TO CLEAR.
Either start the vehicle or put vehicle on a battery charger to ensure sufficient battery voltage.
Vent the vehicle down to the kneel position. (Having the key off, transmission in park, air suspension switch on and all openings, doors and liftgate glass closed will make the vehicle kneel.)
NOTE: DO NOT SIT IN THE VEHICLE DURING THIS PROCESS. THE VEHICLE MAY NOT KNEEL OR MAY KNEEL VERY LITTLE IF THE HEIGHT OF THE VEHICLE IS NEAR THE KNEEL POSITION.
Pump the vehicle to the current calibrated trim height by turning the key to run, shifting to drive, and then returning to park and closing all vehicle openings (message center should show no openings ajar). Vehicle will then pump to the currently calibrated trim height.
Connect the NGS or WDS to the vehicle (make sure that the UBP cable is used if the NGSis the tool being utilized).
Using the NGS Service Card (green card) software version 11.2 or later, or WDS software version B25 or later, command the pneumatic test.
Run the pneumatic test. Due to vehicle network issues, the NGS may drop out before the test completes. When this occurs, rerun the pneumatic test with no one in or on the vehicle. If the test has been running for 5 minutes or more, the NGS has dropped out. The tester will indicate if the vehicle has passed the test.
NOTE: PASSAGE OF THE PNEUMATIC TEST DOES NOT ELIMINATE THE POSSIBILITY OF MALFUNCTIONING SOLENOID VALVES.
After passage of the pneumatic test, use NGS Diagnostic Card (red card) version 22 or later (or WDS Software version B25 or later) to retrieve any DTCs. If C1990 or C1991 is present, go to Step 8 and calibrate the ride heights. Otherwise, go to Step 10.
Using the NGS Service Card (green card) software version 11.2 or later, or WDS software version B25 or later, manually raise and lower the vehicle to the correct ride height as defined in Workshop Manual Section 204-05 on an alignment machine and calibrate the ride heights.
NOTE: MANUAL SEND MODE ON THE NGS WORKS BETTER THAN THE AUTO SEND MODE. (NOT APPLICABLE TO NGS GREEN CARD 11.2.)
Using the NGS Diagnostic Card (red card) version 22 or later, retrieve the DTCs and verify that all DTCs have been cleared.
Drive vehicle and verify the repair. Verify the "Check Suspension" message is gone. Make the system vent to kneel and pump to trim several times while verifying system function.
F: COMPRESSOR RELAY CHANGE - VEHICLES BUILT AFTER FEBRUARY 3, 2003
Navigator vehicles built prior to February 3, 2003 use a solid-state relay for the air suspension compressor motor. The control line from the module is grounded to energize the relay. The relay is located on the radiator support on the right side just behind the headlamp assembly.
Both Navigator and Expedition vehicles equipped with air suspension built since February 3, 2003 utilize a mechanical relay for the compressor motor. The control line from the module is grounded to energize the relay. The relay is located on the compressor bracket just above the compressor attachment to the radiator support on the right side.
In addition, there are important wiring differences between the two relays. Early production vehicle relays have one power feed, where late production relays have two (both are hot at all times). The solid-state relay also employs an external full-time ground, where the mechanical relay does not. See Fig. 2 for more details.
PARTS INFORMATION
PARTS INFORMATION
Part Number Part Name
2LlZ-5311-AA Solenoid - Air Suspension
WARRANTY INFORMATION
WARRANTY STATUS: Information Only.
Fig. 1: Compressor Mounting Bolts
Fig. 2: Early/Late Production Relay Wiring Diagrams
Второе:
AIR SUSPENSION COMPRESSOR NOISE
TECHNICAL SERVICE BULLETIN
Reference Number(s): 05-26-18, Date of Issue: December 31, 2005
FORD: 1997-2004 Expedition
LINCOLN: 1998-2004 Navigator
Superceded Bulletin(s): 04-5-4, Date of Issue: March 22, 2004
ISSUE
NOTE: This article supersedes TSB 04-5-4 to update the Service Procedure.
Some 1997-2004 Expedition and 1998-2004 Navigator vehicles equipped with air suspension, may exhibit excessive noise from the air suspension compressor.
ACTION
To service, replace the compressor mounting bracket with a revised bracket. Order and install Noise Kit 4L1Z-5Z205-AA. Refer to the instruction sheets included in the Kit for installation procedures.
PARTS INFORMATION
PARTS INFORMATION
Part Number Part Name
4L1Z-5Z205-AA Noise Kit (Air Suspension)
WARRANTY INFORMATION
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage.
WARRANTY INFORMATION
Operation Description Time
052618A 1997-2004 Expedition/1998-2004 Navigator: Install Newly Designed Mounting Bracket And Isolators (Includes Time To Remove And Install Air Suspension Compressor) 1.0 Hr.
DEALER CODING
Basic Part No. Condition Code
5319 42
Третье:
AIR SUSPENSION PERFORMANCE - HEIGHT SENSOR LINKAGE ARM DISENGAGING
TECHNICAL SERVICE BULLETIN
Reference Number(s): 06-15-10, Date of Issue: August 7, 2006
FORD: 2003-2006 Expedition
LINCOLN: 2003-2006 Navigator
ISSUE
Some 2003-2006 Expedition and Navigator vehicles equipped with an air suspension may exhibit an air suspension height sensor linkage arm disengaging from the suspension ball stud or height sensor rotating arm. This concern typically occurs with the rear sensor (Fig. 1 ) but may occur with the front sensors as well. If this occurs, the symptom will typically be the vehicle leaning to one side, the vehicle sitting too low/high, a harsh ride, and/or an inoperative air suspension. In addition, this concern may result in diagnostic trouble code (DTC) C1725 (air suspension front pneumatic failure) or C1726 (air suspension rear pneumatic failure).
ACTION
When a linkage arm becomes disengaged, do not re-attach the arm and do not replace the sensor unless broken. Instead, install a revised linkage arm on all three (3) sensor assemblies, even if they have not detached from the ball stud. Refer to the following Service Procedure.
Fig. 1: Disengaged Linkage Arm
SERVICE PROCEDURE
NOTE: LINKAGE ARMS USED AS ORIGINAL EQUIPMENT ARE SHOWN IN Fig. 2 . REVISED LINKAGE ARMS (Fig. 3 ) HAVE A NEW DESIGN THAT MAKES IT MORE DIFFICULT TO DISENGAGE FROM THE BALL STUDS.
Fig. 2: Old Style Link
Fig. 3: New Style Link
NOTE: IF THE SENSOR ASSEMBLY NEEDS TO BE REPLACED FOR ANY DAMAGE/FAILURE OTHER THAN THE ONE DESCRIBED IN THIS TSB, THE REPLACEMENT ASSEMBLY IS SUPPLIED WITH A NEW STYLE LINKAGE ARM, SO THERE IS NO NEED TO ORDER ADDITIONAL LINKAGES FOR THE SERVICE REPAIR.
Replace linkage arms on all three (3) sensor assemblies following Workshop Manual (WSM), Section 204-05.
Discard the old linkage arms.
PARTS INFORMATION
PARTS INFORMATION
Part Number Part Name
6L1Z-3D038-A Linkage Arm (3 per pack)
WARRANTY INFORMATION
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage.
WARRANTY INFORMATION
Operation Description Time
061510A 2003-2006 Expedition/Navigator: Replace The Three Linkage Arms, Includes Time To Check Diagnostic Trouble Codes (Do Not Use With 5300A, 5300A7, 5300A 0.4 Hr.
DEALER CODING
Basic Part No. Condition Code
5A967 07
четвертое:
CLUNK/GRIND/THUMP NOISE - FRAME REPAIR PROCEDURE
TECHNICAL SERVICE BULLETIN
Reference Number(s): 05-16-10, Date of Issue: August 22, 2005
FORD: 2003 Expedition; 2005-2006 Expedition
LINCOLN: 2003 Navigator; 2005-2006 Navigator
DESCRIPTION
CLUNK/GRIND/THUMP NOISE - FRAME REPAIR PROCEDURE
ISSUE
Some 2003 Expedition/Navigator built 3/18/2003 through 9/3/2003 and 2005-2006 built 8/2/2004 to 6/13/2005 may exhibit a clunk/grind/thump noise from the rear of the vehicle. The condition will occur when the transmission is shifted, the vehicle changes direction, or on acceleration. Vehicles may also exhibit a vibration from the driveshaft/axle area. This may be due to missing or damaged attachment bolts that secure the rear torque arm to the axle housing. In rare cases, if symptoms are ignored and the bolts are allowed to completely disengage, the differential may tip upwards allowing the driveshaft to make contact with the frame.
ACTION
If frame damage is found, a service kit is available to repair and reinforce the frame. Refer to the instruction sheet included in the kit.
PARTS INFORMATION
PARTS INFORMATION
Part Number Part Name
2L1Z-5045-AA Reinforcement Kit
OTHER APPLICABLE ARTICLES
05-16-1
WARRANTY INFORMATION
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage.
DEALER CODING
Basic Part No. Condition Code
4612 33
Оригинал By def7
По просьбе одного соклубника смотрел подвеску. Обнаружил интересное ТСБ, по тем вопросам, которые неоднократно обсуждались и по C1990 & C1991.
В том числе по шуму и поведению после зимы , калибровке датчиков подъема, шуму и стукам сзади.
Думаю будет полезно.
Первое:
AIR SUSPENSION COMPRESSOR NOISE - DTC'S C1990 & C1991
TECHNICAL SERVICE BULLETIN
Reference Number(s): 03-13-2, Date of Issue: July 7, 2003
FORD: 2003 EXPEDITION
LINCOLN: 2003 NAVIGATOR
DESCRIPTION
SUSPENSION - AIR SUSPENSION SYSTEM OVERVIEW - DIAGNOSIS/SCAN TOOL INFORMATION DTC'S C1990 AND C1991 - COMPRESSOR NOISE
ELECTRICAL - AIR SUSPENSION SYSTEM OVERVIEW - DIAGNOSIS/SCAN TOOL INFORMATION DTC'S C1990 AND C1991 - COMPRESSOR NOISE
ISSUE
This article is being published as a diagnostic aid to supplement the existing Workshop Manual diagnostics (see items A through F under CONTENTS). This article will also address the proper procedure to clear Diagnostic Trouble Codes (DTC's) C1990 or C1991 from the Vehicle Dynamics Module (VDM)/4-Wheel Air Suspension Module (4WAS).
ACTION
Refer to the following diagnostic aid and Service Tips for complete air suspension overview and to help properly diagnose the system.
SERVICE INFORMATION
CONTENTS
A: Brief description of suspension operation
B: Diagnostic tools
C: Diagnosis of leaky air spring solenoids
D: Compressor noise
E: C1990 and C1991 DTC's
F: Compressor relay change - Vehicles built after February 3, 2003
A: AIR SUSPENSION SYSTEM OVERVIEW
Vehicle height is controlled by the 4-Wheel Air Suspension Module (4WAS) based on height sensor output voltages.
The Vehicle Dynamics Module (VDM) and the 4-Wheel Air Suspension Module (4WAS) are the same module. This was a naming convention change in mid-model year 2003.
Each air spring has a solenoid that must open to vent or compress.
The air suspension compressor has a vent solenoid that must open to vent the system.
The transition from trim height to kneel height or from kneel height to trim height takes approximately 30 to 45 seconds.
The front air springs are independently controlled. The rear air springs are always controlled as a pair.
The system will not operate with any doors open, with the liftgate open, with the liftgate glass open or with the power running boards extended.
The air suspension switch position is ignored above 15 mph. The air suspension will be active over 15 mph, regardless of the switch position.
Kneel Mode is defined as 25mm below Trim Mode.
Trim Mode is defined as normal driving height.
4X4 Off-Road Mode is engaged when the vehicle is in 4X4 Low at a speed of less than 19 MPH, and is defined as 25mm above trim height.
Height Sensor Operation
There are 3 height sensors - Left Front, Right Front, and Right Rear.
The sensor output ranges between 0.5 volts and 4.5 volts.
The Left Front and Right Front sensors are opposite in polarity.
The voltage output of the sensors decreases as the vehicle body rises and increases as the vehicle body lowers.
Ride Height Change Triggers
When the ignition key is in the "Run" position and the vehicle is shifted to either "Drive" or "Reverse", the ride height will change from Kneel to Trim.
When the ignition key is in the "Off" position and the doors are closed after being open, the ride height will change from Trim to Kneel.
When the vehicle is engaged into 4X4 LOW, the ride height will change to Off-Road.
B: DIAGNOSTIC TOOLS (NGS AND WDS)
The VDM/4WAS module communicates with the network via the UBP protocol. This communication protocol can occasionally result in slow communication with the New Generation Star (NGS) or Worldwide Diagnostic System (WDS) tools. This may make the diagnostic tools appear sluggish or appear to "lock up" occasionally during diagnostic use or idle periods. In order to minimize the likelihood of slow response or tool lock-up, the following is recommended:
Minimize the number of viewed PIDs as much as possible while using active commands or PID monitoring/data recording.
Take care to give the tool time to react, as responses may be slow.
NOTE: WDS SOFTWARE VERSIONS PRIOR TO B25 (RELEASE DATE MID-MAY 2003) DO NOT SUCCESSFULLY TEST THE AIR SUSPENSION SYSTEM. BE SURE THAT THE WDS IS UPDATED TO VERSION B25 OR LATER PRIOR TO PERFORMING AIR SUSPENSION DIAGNOSTICS. WDS VERSION B25 CAN BE USED FOR ALL DIAGNOSTIC AND SERVICE FUNCTIONS ON THE 4WAS MODULE.
NOTE: THE WDS MUST BE USED TO CLEAR A B2477 DTC IN A NAVIGATOR 4WAS MODULE.
NOTE: THE UBP CABLE (ROTUNDA 105-100) MUST BE USED WITH THE NGS TO COMMUNICATE WITH THE VDM/4WAS MODULE. (THE WDS DOES NOT REQUIRE A SPECIAL CABLE TO COMMUNICATE WITH THE VDM/4WAS MODULE.)
For NGS Classic software releases prior to August 2003, the NGS can be used for all diagnostic and service functions on the 4WAS module except for Module Configuration, which , downloads the VAPS curve and clears the B2477 code. The NGS can be used for ride height programming with the service (green) card version 11.2 or higher and the UBP cable.
For NGS+ software releases after August 2003, the NGS can be used for all diagnostic and service functions on the 4WAS module.
NOTE: DO NOT REPLACE THE VDM/4WAS CONTROL MODULE (3C142) SIMPLY BECAUSE THE ABOVE SYMPTOMS EXIST, SINCE THE CONTROL MODULE IS NOT THE CAUSE.
C: DIAGNOSIS OF INTERMITTENT AND/OR UNEXPECTED RIDE HEIGHT BEHAVIOR
Leaky air spring solenoids usually result in intermittent and/or unexpected ride height behavior. The vehicle may not have been driven long enough to set a pneumatic failure DTC (C1725 and/or C1726) in the VDM/4WAS module, and the warning message may or may not be turned on during system malfunction.
Leaky air spring solenoids do not leak to the atmosphere, but instead to the airlines within the system. Inability of the solenoids to stop air flow will usually be apparent immediately after they are commanded to close.
Some symptoms of leaky air spring solenoids are the following:
Front end low and rear end high.
One corner drops more than it should during a height change process or while vehicle is parked.
Rear end high and front end near or at normal height.
Front end low and rear end near or at normal height.
NOTE: ANY OF THE PREVIOUS ISSUES MAY BE INTERMITTENT IN OCCURRENCE.
NOTE: DO NOT RECALIBRATE RIDE HEIGHTS SIMPLY BECAUSE THE RIDE HEIGHTS APPEAR INCORRECT. INCORRECT RIDE HEIGHTS ARE ONLY A SYMPTOM OF A DIFFERENT SYSTEM PROBLEM AND DO NOT INDICATE A NEED FOR RIDE HEIGHT CALIBRATION. ALL RIDE HEIGHTS ARE 100% SET DURING VEHICLE MANUFACTURE AND WILL NOT CHANGE OVER TIME. RIDE HEIGHT CALIBRATION IS ONLY NEEDED WHEN A HEIGHT SENSOR OR AIR SUSPENSION CONTROL MODULE HAS BEEN REPLACED.
Diagnosis Steps:
Disconnect and remove the airline union at the midpoint of the right hand frame rail near the body mount. Pressure will be relieved in 3 to 5 seconds.
NOTE: WHEN THE SPRING SOLENOIDS ARE OPEN, THE VEHICLE WILL LOWER QUICKLY.
Verify that the air suspension solenoids close properly:
Using the NGS (or WDS Software version B25 or later), cycle each air spring solenoid (LF, RF, LR, RR) one at a time from open (on) to closed (off). Air should flow from the open air line when the solenoid is opened, and should stop when the solenoid is closed. After closing the solenoid, cap the open line with your thumb to see if the air continues to be released from the air spring. A buildup of pressure in the line (i.e., all spring solenoids are off and the compressor is not running) identifies a leaking solenoid(s). CYCLE EACH SOLENOID SEVERAL TIMES AS THE PROBLEM MAY BE INTERMITTENT.
Replace the leaking solenoid or solenoids with a revised part 2L1Z-5311-AA.
NOTE: WHEN REPLACING A LEAKING SOLENOID, CHECK THE SOLENOID DATE CODE ON THE SIDE OF THE NEW SOLENOID BODY. THE DATE CODE, SHOWN IN STAMPED LETTERS IN JULIAN FORMAT, SHOULD BE ON OR LATER THAN 0363. IF IT IS EARLIER THAN THIS DATE, THE SOLENOID IS SUSPECT AND SHOULD NOT BE USED ON THE VEHICLE.
Retest for leaky solenoids.
Road test the vehicle to ensure a robust repair.
D: COMPRESSOR NOISE
Excessive compressor noise can be caused by a loose compressor-to-body mounting, compressor ground-outs, or loose parts (bolts, nuts, etc.) on or underneath the compressor assembly. Compressor noise is NOT usually corrected by replacing the compressor assembly itself.
The compressor does make an audible noise that can be heard during cycling of the system. Normal operation is characterized by a moderate humming or buzzing sound from under the hood during compressor operation.
Perform the following actions before replacing any compressor for a noise complaint:
Check to make sure the three attachment bolts are securely fastened to the body (Fig. 1 ).
Make sure that no parts are trapped under or on the compressor bracket.
Make sure that the compressor motor assembly is not in contact with any surrounding component that could cause vibration noises.
Ensure that the compressor is free to move in its rubber mounting grommets. Make sure the compressor bracket has not been bent or deformed in any way that would load the rubber mounts against each other.
E: CLEARING C1990 AND C1991 DTCS
These codes must be cleared or the "Check Suspension" warning message will be turned on.
All service modules are built with the C1990 code. All assembly plant modules are built with the C1991 code. These codes can only be cleared using the following procedures.
C1990 and C1991 can be re-enabled in the control module by resetting the ride heights to their default value, or when the pneumatic test has failed. When either one of these DTC's are present, the air suspension warning will be enabled.
Clearing C1990 or C1991
NOTE: BEFORE PROCEEDING WITH THE FOLLOWING STEPS, ENSURE THAT THE SYSTEM IS FULLY FUNCTIONAL. THE VEHICLE MUST PASS THE PNEUMATIC TEST AND HAVE ALL THREE RIDE HEIGHT SENSORS CALIBRATED FOR THESE CODES TO CLEAR.
Either start the vehicle or put vehicle on a battery charger to ensure sufficient battery voltage.
Vent the vehicle down to the kneel position. (Having the key off, transmission in park, air suspension switch on and all openings, doors and liftgate glass closed will make the vehicle kneel.)
NOTE: DO NOT SIT IN THE VEHICLE DURING THIS PROCESS. THE VEHICLE MAY NOT KNEEL OR MAY KNEEL VERY LITTLE IF THE HEIGHT OF THE VEHICLE IS NEAR THE KNEEL POSITION.
Pump the vehicle to the current calibrated trim height by turning the key to run, shifting to drive, and then returning to park and closing all vehicle openings (message center should show no openings ajar). Vehicle will then pump to the currently calibrated trim height.
Connect the NGS or WDS to the vehicle (make sure that the UBP cable is used if the NGSis the tool being utilized).
Using the NGS Service Card (green card) software version 11.2 or later, or WDS software version B25 or later, command the pneumatic test.
Run the pneumatic test. Due to vehicle network issues, the NGS may drop out before the test completes. When this occurs, rerun the pneumatic test with no one in or on the vehicle. If the test has been running for 5 minutes or more, the NGS has dropped out. The tester will indicate if the vehicle has passed the test.
NOTE: PASSAGE OF THE PNEUMATIC TEST DOES NOT ELIMINATE THE POSSIBILITY OF MALFUNCTIONING SOLENOID VALVES.
After passage of the pneumatic test, use NGS Diagnostic Card (red card) version 22 or later (or WDS Software version B25 or later) to retrieve any DTCs. If C1990 or C1991 is present, go to Step 8 and calibrate the ride heights. Otherwise, go to Step 10.
Using the NGS Service Card (green card) software version 11.2 or later, or WDS software version B25 or later, manually raise and lower the vehicle to the correct ride height as defined in Workshop Manual Section 204-05 on an alignment machine and calibrate the ride heights.
NOTE: MANUAL SEND MODE ON THE NGS WORKS BETTER THAN THE AUTO SEND MODE. (NOT APPLICABLE TO NGS GREEN CARD 11.2.)
Using the NGS Diagnostic Card (red card) version 22 or later, retrieve the DTCs and verify that all DTCs have been cleared.
Drive vehicle and verify the repair. Verify the "Check Suspension" message is gone. Make the system vent to kneel and pump to trim several times while verifying system function.
F: COMPRESSOR RELAY CHANGE - VEHICLES BUILT AFTER FEBRUARY 3, 2003
Navigator vehicles built prior to February 3, 2003 use a solid-state relay for the air suspension compressor motor. The control line from the module is grounded to energize the relay. The relay is located on the radiator support on the right side just behind the headlamp assembly.
Both Navigator and Expedition vehicles equipped with air suspension built since February 3, 2003 utilize a mechanical relay for the compressor motor. The control line from the module is grounded to energize the relay. The relay is located on the compressor bracket just above the compressor attachment to the radiator support on the right side.
In addition, there are important wiring differences between the two relays. Early production vehicle relays have one power feed, where late production relays have two (both are hot at all times). The solid-state relay also employs an external full-time ground, where the mechanical relay does not. See Fig. 2 for more details.
PARTS INFORMATION
PARTS INFORMATION
Part Number Part Name
2LlZ-5311-AA Solenoid - Air Suspension
WARRANTY INFORMATION
WARRANTY STATUS: Information Only.
Fig. 1: Compressor Mounting Bolts
Fig. 2: Early/Late Production Relay Wiring Diagrams
Второе:
AIR SUSPENSION COMPRESSOR NOISE
TECHNICAL SERVICE BULLETIN
Reference Number(s): 05-26-18, Date of Issue: December 31, 2005
FORD: 1997-2004 Expedition
LINCOLN: 1998-2004 Navigator
Superceded Bulletin(s): 04-5-4, Date of Issue: March 22, 2004
ISSUE
NOTE: This article supersedes TSB 04-5-4 to update the Service Procedure.
Some 1997-2004 Expedition and 1998-2004 Navigator vehicles equipped with air suspension, may exhibit excessive noise from the air suspension compressor.
ACTION
To service, replace the compressor mounting bracket with a revised bracket. Order and install Noise Kit 4L1Z-5Z205-AA. Refer to the instruction sheets included in the Kit for installation procedures.
PARTS INFORMATION
PARTS INFORMATION
Part Number Part Name
4L1Z-5Z205-AA Noise Kit (Air Suspension)
WARRANTY INFORMATION
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage.
WARRANTY INFORMATION
Operation Description Time
052618A 1997-2004 Expedition/1998-2004 Navigator: Install Newly Designed Mounting Bracket And Isolators (Includes Time To Remove And Install Air Suspension Compressor) 1.0 Hr.
DEALER CODING
Basic Part No. Condition Code
5319 42
Третье:
AIR SUSPENSION PERFORMANCE - HEIGHT SENSOR LINKAGE ARM DISENGAGING
TECHNICAL SERVICE BULLETIN
Reference Number(s): 06-15-10, Date of Issue: August 7, 2006
FORD: 2003-2006 Expedition
LINCOLN: 2003-2006 Navigator
ISSUE
Some 2003-2006 Expedition and Navigator vehicles equipped with an air suspension may exhibit an air suspension height sensor linkage arm disengaging from the suspension ball stud or height sensor rotating arm. This concern typically occurs with the rear sensor (Fig. 1 ) but may occur with the front sensors as well. If this occurs, the symptom will typically be the vehicle leaning to one side, the vehicle sitting too low/high, a harsh ride, and/or an inoperative air suspension. In addition, this concern may result in diagnostic trouble code (DTC) C1725 (air suspension front pneumatic failure) or C1726 (air suspension rear pneumatic failure).
ACTION
When a linkage arm becomes disengaged, do not re-attach the arm and do not replace the sensor unless broken. Instead, install a revised linkage arm on all three (3) sensor assemblies, even if they have not detached from the ball stud. Refer to the following Service Procedure.
Fig. 1: Disengaged Linkage Arm
SERVICE PROCEDURE
NOTE: LINKAGE ARMS USED AS ORIGINAL EQUIPMENT ARE SHOWN IN Fig. 2 . REVISED LINKAGE ARMS (Fig. 3 ) HAVE A NEW DESIGN THAT MAKES IT MORE DIFFICULT TO DISENGAGE FROM THE BALL STUDS.
Fig. 2: Old Style Link
Fig. 3: New Style Link
NOTE: IF THE SENSOR ASSEMBLY NEEDS TO BE REPLACED FOR ANY DAMAGE/FAILURE OTHER THAN THE ONE DESCRIBED IN THIS TSB, THE REPLACEMENT ASSEMBLY IS SUPPLIED WITH A NEW STYLE LINKAGE ARM, SO THERE IS NO NEED TO ORDER ADDITIONAL LINKAGES FOR THE SERVICE REPAIR.
Replace linkage arms on all three (3) sensor assemblies following Workshop Manual (WSM), Section 204-05.
Discard the old linkage arms.
PARTS INFORMATION
PARTS INFORMATION
Part Number Part Name
6L1Z-3D038-A Linkage Arm (3 per pack)
WARRANTY INFORMATION
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage.
WARRANTY INFORMATION
Operation Description Time
061510A 2003-2006 Expedition/Navigator: Replace The Three Linkage Arms, Includes Time To Check Diagnostic Trouble Codes (Do Not Use With 5300A, 5300A7, 5300A 0.4 Hr.
DEALER CODING
Basic Part No. Condition Code
5A967 07
четвертое:
CLUNK/GRIND/THUMP NOISE - FRAME REPAIR PROCEDURE
TECHNICAL SERVICE BULLETIN
Reference Number(s): 05-16-10, Date of Issue: August 22, 2005
FORD: 2003 Expedition; 2005-2006 Expedition
LINCOLN: 2003 Navigator; 2005-2006 Navigator
DESCRIPTION
CLUNK/GRIND/THUMP NOISE - FRAME REPAIR PROCEDURE
ISSUE
Some 2003 Expedition/Navigator built 3/18/2003 through 9/3/2003 and 2005-2006 built 8/2/2004 to 6/13/2005 may exhibit a clunk/grind/thump noise from the rear of the vehicle. The condition will occur when the transmission is shifted, the vehicle changes direction, or on acceleration. Vehicles may also exhibit a vibration from the driveshaft/axle area. This may be due to missing or damaged attachment bolts that secure the rear torque arm to the axle housing. In rare cases, if symptoms are ignored and the bolts are allowed to completely disengage, the differential may tip upwards allowing the driveshaft to make contact with the frame.
ACTION
If frame damage is found, a service kit is available to repair and reinforce the frame. Refer to the instruction sheet included in the kit.
PARTS INFORMATION
PARTS INFORMATION
Part Number Part Name
2L1Z-5045-AA Reinforcement Kit
OTHER APPLICABLE ARTICLES
05-16-1
WARRANTY INFORMATION
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage.
DEALER CODING
Basic Part No. Condition Code
4612 33
Оригинал By def7
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