Seat Cushion: Service and Repair
FRONT SEAT CUSHIONSpecial Tool(s):
SPECIAL TOOL(S)
DISASSEMBLY
WARNING:
- Always wear safety glasses when repairing an air bag supplemental restraint system (SRS) vehicle and when handling an air bag module. This will reduce the risk of injury in the event of an accidental deployment.
- After deployment, the air bag surface can contain deposits of sodium hydroxide, a product of the gas generant combustion that is irritating to the skin. Wash your hands with soap and water afterwards.
- Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.
NOTE: Driver side shown, passenger side similar.
All vehicles
1. WARNING: To avoid accidental deployment and possible personal injury, the backup power supply must be depleted before repairing or replacing any front or side air bag supplemental restraint system (SRS) components and before servicing, replacing, adjusting or striking components near the front or side air bag sensors, such as doors, instrument panel, console, door latches, strikers, seats and hood latches.
The side impact sensors are located at or near the base of the B-pillars.
To deplete the backup power supply energy, disconnect the battery ground cable and wait at least one minute. Be sure to disconnect auxiliary batteries and power supplies (if equipped).
Disconnect the battery ground cable and wait at least one minute.
Vehicles with seat side air bags
2. WARNING: To reduce the risk of serious personal injury, read and follow all warnings, cautions, notes, and instructions in the supplemental restraint system (SRS) deactivation/reactivation procedure.
Deactivate the supplemental restraint system (SRS).
Passenger seat
3. Remove the occupant classification sensor (OCS).
Driver seat
4. WARNING: To reduce the risk of serious personal injury, read and follow all warnings, notes, and instructions in the front seat removal and installation procedure.
Remove the affected seat.
5. Remove the front seat backrest.
6. Remove the seat track.
Crown Victoria / Grand Marquis
7. NOTE: Take care when removing the power lumbar bezel, pry the side of bezel at tabs to remove.
Remove the power lumbar switch bezel.
8. Disconnect the lumbar switch electrical connector.
Driver seat
9. Release the retainers.
1 Release the J-clips.
2 Remove the pin-type retainer.
Vehicles with heated seats
10. Disconnect the cushion heated seat element electrical connector.
11. Disconnect the heated seat module electrical connector.
12. Insert a flat-blade screwdriver into the heated seat module bracket and release the locking tab. Remove the heated seat module.
Marauder
13. Disconnect the power lumbar switch electrical connector.
Crown Victoria / Grand Marquis
14. Remove the cover.
15. Remove the retaining clip.
16. Remove the pin.
17. Remove the armrest.
18. Remove the armrest cover trim.
19. Remove the three bolts (two shown) and armrest bracket.
Driver seat
20. Remove the frame.
21. Remove the seat trim cover from the cushion foam.
22. Remove the flexolator from the frame.
Vehicles with heated seats
23. Remove the cushion heated seat element, if necessary.
ASSEMBLY
WARNING: To reduce the risk of serious personal injury, read and follow all warnings, cautions, and notes at the beginning of the disassembly procedure.
Passenger seat
1. Install the occupant classification sensor (OCS).
Vehicles with heated seats
2. Install the cushion heated seat element, if necessary.
Driver seat
3. Install the flexolator to the frame.
4. Install the seat trim cover to the cushion foam.
5. Install the frame.
Crown Victoria/Grand Marquis
6. Install the armrest bracket and the three (two shown) bolts.
7. Install the armrest cover trim.
8. Install the armrest.
9. Install the pin.
10. Install the cover.
Marauder
11. Connect the power lumbar switch electrical connector.
Vehicles with heated seats
12. Slide the heated seat module on the bracket until fully seated into the bracket.
13. Connect the heated seat module electrical connector.
14. Connect the cushion heated seat element electrical connector.
Driver seat
15. Fasten the retainers.
1 Install the pin-type retainer.
2 Fasten the J-clip.
Crown Victoria/Grand Marquis
16. Connect the power lumbar electrical connector.
17. Install the power lumbar switch bezel.
All vehicles
18. Install the seat track.
19. Install the front seat backrest.
20. WARNING: To reduce the risk of serious personal injury, read and follow all warnings, notes, and instructions in the front seat removal and installation procedure.
Install the seat.
21. CAUTION:
- If installing only the front passenger seat cushion trim cover, the seat occupant classification sensor (OCS) must be rezeroed.
- The following precautions must be taken before rezeroing of the OCS system.
- Make sure the OCS system components are connected and no faults are present.
- Make sure the vehicle has not been exposed to temperatures below 6°C (42°F) or above 36°C (97°F) within four hours prior to the rezeroing process. If the vehicle has been exposed to temperatures outside the temperature limits (6-36°C), the vehicle must be exposed to and kept at a temperature within the limits for minimum of four hours.
- Make sure nothing is present on the passenger seat before rezeroing and nothing is placed on the seat during the rezeroing process.
- Make sure a minimum five second time period has passed after cycling the ignition switch ON before the rezeroing process.
NOTE:
- It is necessary to rezero the OCS system when a front passenger seat cushion is disassembled, a new trim cover installed, or an OCS service kit is installed. A scan tool is used to trigger the active command to carry out rezeroing of the OCS system.
- When using a New Generation Star (NGS) tester, you must use the appropriate memory card with the latest update to carry out this function. To rezero the OCS system:
- select SERVICE BAY FUNCTIONS
- select RCM
- select SYSTEM RESET
- select the vehicle from the menu
- view the on-screen information then press TRIGGER
The NGS screen will then display OCS RESET: REZERO. Press DONE (button 8) to rezero the OCS system. The NGS will return to the vehicle menu once rezeroing of the OCS system is complete.
NOTE: To rezero the OCS system using the Worldwide Diagnostic System (WDS):
- select the Toolbox icon
- select Body from the menu
- select Restraints from the menu
- select Seat Weight Sensor ReZero
After selecting Seat Weight Sensor ReZero, follow the on-screen prompts to carry out rezeroing of the OCS system.
NOTE: If the first attempt to rezero the OCS system is unsuccessful, a second attempt must be made.
Rezero the occupant classification sensor.
- With the front passenger seat empty, use a scan tool to trigger the active command and rezero the occupant classification sensor.
Vehicles with seat side air bags
22. WARNING: To reduce the risk of serious personal injury, read and follow all warnings, cautions, notes, and instructions in the supplemental restraint system (SRS) deactivation/reactivation procedure.
Reactivate the supplemental restraint system (SRS).
All vehicles
23. WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from the vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards.
With all the restraint system diagnostic tools removed, prove out the supplemental restraint system (SRS).