Interior - Climate Controlled Seats Turn Off/DTC's Set
TSB 04-18-1609/20/04
CLIMATE CONTROLLED SEATS TURNING OFF SHORTLY AFTER INITIALIZATION - DTC'S B2729, B2730, B2731
LINCOLN:
2003-2004 LS
This article supersedes TSB 04-04-02 to update the vehicle model years and service procedure.
ISSUE
Some 2003-2004 Lincoln LS vehicles may exhibit a condition of one or both climate controlled seats turning off shortly after initialization with one of the following combinations of DTC's present in the climate controlled seat module (CCSM):
^ B2729 (Cushion Over-Temp Detected) with or without B2731 (Differential Temperature Fault) present
^ B2730 (Back Over Temp Detected) only
^ B2731 (Differential Temperature Fault) only
ACTION
The conditions described may be caused by an airflow restriction due to seat cushion crush (2003 Model Year), or one of the ducts in the climate controlled seat may be disconnected (2003 or 2004 Model Years). Refer to the appropriate Service Procedure below for details.
NOTE
DO NOT PERFORM THIS SERVICE PROCEDURE UNLESS AN AIRFLOW RESTRICTION HAS BEEN VERIFIED PER WORKSHOP MANUAL SECTION 501-10 DIAGNOSTICS.
SERVICE PROCEDURE
NOTE
DO NOT REPLACE THE DUAL AUTOMATIC TEMPERATURE CONTROL (DATC) MODULE FOR ANY OF THE CONDITIONS LISTED IN THIS TSB.
NOTE
DTC'S MUST BE RETRIEVED FROM THE CCSM.
NOTE
WORKSHOP MANUAL SECTION 501-10 MAY BE REFERENCED IF HELP IS NEEDED FOR ANY OF THE PROCEDURES BELOW.
2003 MODEL YEAR DRIVER SEAT DTC B2729 WITH OR WITHOUT B2731 PRESENT:
NOTE
DO NOT PERFORM THIS PROCEDURE FOR STAND ALONE DTC B2731.
NOTE
INSURE THAT ALL RESTRAINT SYSTEM WARNING MESSAGES AND NOTES IN WORKSHOP MANUAL SECTION 501-10 ARE FOLLOWED COMPLETELY.
1. Remove the driver front seat assembly.
2. Remove the lower ventilation air blower assembly (19N550) from the driver front seat cushion.
NOTE
DISCONNECT THE LOWER VENTILATION AIR BLOWER ASSEMBLY (19N550) FROM THE UPPER VENTILATION AIR BLOWER ASSEMBLY (19N550) TO SEPARATE THE SEAT CUSHION AND SEAT BACKREST ASSEMBLIES.
3. Scribe a line 6.35 mm (1/4") below the top of the riser on the lower ventilation air blower assembly (Figure 1).
4. Seal the snout with a 51 x 254 mm (2" x 10") piece of clean shop towel packed into place below center-line boss.
5. Cut off the top 6.35 mm (1/4") of the riser using the appropriate tool and clean any edge burrs (Figure 1).
6. Turn the lower ventilation air blower assembly upside down before removing the shop towel to prevent contamination of the element by plastic.
7. Remove the climate controlled seat cushion duct from the driver front seat cushion and discard.
NOTE
THE SEAT CUSHION TRIM COVER DOES NOT NEED TO BE TOTALLY REMOVED. THE SEAT CUSHION TRIM COVER ONLY NEEDS TO BE UNATTACHED ON THE INBOARD AND FRONT SIDE OF THE SEAT CUSHION PAN (60327) TO REMOVE THE CLIMATE CONTROLLED SEAT CUSHION DUCT. DO NOT REMOVE ANY HOG RINGS THAT ATTACH THE SEAT CUSHION TRIM COVER TO THE SEAT CUSHION FOAM PAD. REMOVE THE CLIMATE CONTROLLED SEAT CUSHION DUCT BY PULLING OUT FROM UNDER THE FRONT OF THE SEAT CUSHION TRIM COVER. REFER TO (FIGURES 2 AND 3).
8. Replace the original climate controlled seat cushion duct with new part number 4W4Z-19N550-DA.
9. Install the new climate controlled seat cushion duct, the modified lower ventilation air blower assembly and reassemble the driver front seat cushion.
NOTE
RE-ATTACH AND SECURE THE LOWER VENTILATION AIR BLOWER ASSEMBLY TO UPPER VENTILATION AIR BLOWER ASSEMBLY.
10. Install the driver front seat assembly.
11. Verify proper driver side climate controlled seat operation.
2003 MODEL YEAR PASSENGER SEAT DTC B2729 WITH OR WITHOUT B2731 PRESENT:
NOTE
DO NOT PERFORM THIS PROCEDURE FOR STAND ALONE DTC B2731.
NOTE
INSURE THAT ALL RESTRAINT SYSTEM WARNING MESSAGES AND NOTES IN WORKSHOP MANUAL SECTION 501-10 ARE FOLLOWED COMPLETELY.
1. Remove the passenger front seat assembly.
2. Remove the lower ventilation air blower assembly (19N550) from the passenger front seat cushion.
NOTE
DISCONNECT THE LOWER VENTILATION AIR BLOWER ASSEMBLY FROM THE UPPER VENTILATION AIR BLOWER ASSEMBLY TO SEPARATE THE SEAT CUSHION AND SEAT BACKREST ASSEMBLIES.
3. Remove the riser extension (TORX T20 screw) on the lower ventilation air blower assembly and discard the extension and screw (Figure 4).
4. Remove the climate controlled seat cushion duct from the passenger front seat cushion and discard.
NOTE
THE SEAT CUSHION TRIM COVER DOES NOT NEED TO BE TOTALLY REMOVED. THE SEAT CUSHION TRIM COVER ONLY NEEDS TO BE UNATTACHED ON THE INBOARD AND FRONT SIDE OF THE SEAT CUSHION PAN (60327) TO REMOVE THE CLIMATE CONTROLLED SEAT CUSHION DUCT. DO NOT REMOVE ANY HOG RINGS THAT ATTACH THE SEAT CUSHION TRIM COVER TO THE SEAT CUSHION FOAM PAD. REMOVE THE CLIMATE CONTROLLED SEAT CUSHION DUCT BY PULLING OUT FROM UNDER THE FRONT OF THE SEAT CUSHION TRIM COVER. REFER TO (FIGURES 2 AND 3).
5. Replace the original climate controlled seat cushion duct with new part number 4W4Z-19N550-DA.
6. Install the new climate controlled seat cushion duct, the modified lower ventilation air blower assembly and reassemble the passenger front seat cushion.
NOTE
REATTACH AND SECURE THE LOWER VENTILATION AIR BLOWER ASSEMBLY TO UPPER VENTILATION AIR BLOWER ASSEMBLY.
7. Install the passenger front seat assembly.
8. Verify proper passenger side climate controlled seat operation.
2003-2004 MODEL YEAR PASSENGER OR DRIVER SEAT STAND ALONE DTC B2730 OR STAND ALONE DTC B2731:
NOTE
DO NOT PERFORM THIS PROCEDURE IF DTC B2729 IS PRESENT.
NOTE
INSURE THAT ALL RESTRAINT SYSTEM WARNING MESSAGES AND NOTES IN WORKSHOP MANUAL SECTION 501-10 ARE FOLLOWED COMPLETELY.
1. Remove backrest trim panel from affected seat.
2. Inspect for disconnected duct at lower ventilation air blower assembly to upper ventilation air blower assembly.
a. If the upper and lower assemblies are connected do not continue with this TSB. Refer to Workshop Manual Section 501-10 for further diagnostics.
b. If the upper and lower assemblies are disconnected continue to Step 3.
3. Remove pin-type retainer that attaches upper ventilation air blower assembly to seat backrest frame.
4. Reconnect and secure lower ventilation air blower assembly to upper ventilation air blower assembly.
5. Obtain locally, two inch wide black vinyl duct tape and cut two (2) pieces 51 mm long (2" long).
6. Place one (1) piece of tape on opposite sides of the lower ventilation air blower assembly and the upper ventilation air blower assembly's connection (Figure 5).
7. Wrap lower ventilation air blower assembly and upper ventilation air blower assembly connection two (2) times with duct tape (Figure 6).
8. Reinstall pin type retainer that attaches upper ventilation air blower assembly to seat backrest frame.
9. Reinstall backrest trim panel.
10. Verify proper climate controlled seat operation.
PARTS BLOCK
Operation/Description/Time
WARRANTY STATUS:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
DEALER CODING
CONDITION
BASIC PART NO. CODE
19N550 34
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