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Occupant Classification Sensor: Removal

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Make sure the front passenger seat repair is complete, the seat and all attached components (head restraint, seat side shield, etc.) are correctly assembled, and the seat is correctly installed to the vehicle before carrying out the System Reset. Failure to follow these instructions may result in incorrect operation of the occupant classification sensor (OCS) system and increases the risk of serious personal injury or death in a crash.
NOTE: It is necessary to carry out the Occupant Classification Sensor (OCS) system reset when a front passenger seat cushion is disassembled, a new trim cover is installed or an OCS system service kit is installed. A scan tool is used to carry out the OCS system reset command. Failure to follow this instruction may result in system failure and the incorrect operation of the OCS system.
NOTE: To identify between a production Occupant Classification Sensor (OCS) system and a OCS system service kit, inspect the Occupant Classification System Module (OCSM) electrical connector. 

A production OCS system allows the disconnection of the OCSM electrical connector.

An OCS system service kit has the electrical connector glued to the module, it cannot and should not be disconnected or altered.

NOTE: The heated seat element on the front passenger seat cushion is not serviceable separately. If a new heated seat element is needed on the front passenger seat cushion, a new OCS system service kit and a new heated seat element must be installed.
NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition is ON.
NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

All seats 

  1. Remove the front passenger seat. For additional information, refer to SEATING article.
  2. Remove the front seat backrest. For additional information, refer to SEATING article.
  3. Remove the seat track. For additional information, refer to SEATING article.

    4. Heated seats 

  4. Disconnect the cushion heated seat element electrical connector.

    5. Seats with manual recline 

  5. Remove the seat backrest recliner handle.

    6. Seats with power lumbar 

  6. Release the tabs at the front and back to separate the power lumbar switch and bezel from the seat cushion pan.
  7. Disconnect the electrical connector and remove the power lumbar switch.

    8. All seats 

  8. Release the remaining seat cushion trim cover J-clips.
    9. NOTE: It is necessary to carry out the Occupant Classification Sensor (OCS) system reset when a front passenger seat cushion is disassembled, a new trim cover is installed or an OCS system service kit is installed. A scan tool is used to carry out the OCS system reset command. Failure to follow this instruction may result in system failure and the incorrect operation of the OCS system.
    NOTE: Use care when separating the seat cushion trim cover from the hook-and-loop strip. The hook-and-loop strip can be torn from the seat cushion foam.
  9. Separate the hook-and-loop strips. Position the seat cushion trim cover aside.
    10. Fig 1: Identifying Hook And Loop Strips
    GF0013476Courtesy of FORD MOTOR CO.
  10. Bend the retaining tab holding the pressure sensor in place down and aside.
    11. Fig 2: Identifying Pressure Sensor
    GF0013477Courtesy of FORD MOTOR CO.

    Seats with an original equipment Occupant Classification Sensor (OCS) system 

  11. Remove the seat cushion pad from the seat cushion frame.
  12. If necessary, remove the 2 pin-type retainers and the mat, otherwise position the mat aside.
  13. Remove the OCSM and separate the pressure sensor from the OCSM bracket.
    1. Release the pressure sensor hose.
    2. Disconnect the electrical connector and slide the pressure sensor off the bracket.
      3. NOTE: Do not oversize the seat cushion frame holes used to rivet the Occupant Classification System Module (OCSM) in place. Failure to follow this instruction may result in system failure and the incorrect operation of the Occupant Classification Sensor (OCS) system.
    3. Using a 5 mm (3/16 in) drill, remove the 3 rivets.
    4. Remove the OCSM bracket.
    5. Disconnect and remove the OCSM.
    14. Fig 3: Removing ECU
    GF0013478Courtesy of FORD MOTOR CO.
  14. Remove the pin-type retainers holding the occupant classification sensor bladder to the seat cushion pan.
    15. NOTE: Make note of the opening that the pressure sensor and hose are being fed through on the seat cushion support assembly for installation purposes.
  15. Separate the occupant classification sensor bladder and pressure sensor from the seat cushion frame.
    • Feed the pressure sensor and hose through the seat cushion support assembly.
    16. Fig 4: Identifying Pressure Sensor And Hose
    GF0013479Courtesy of FORD MOTOR CO.

    Seats with an OCS system service kit 

  16. Separate the OCS components from the seat cushion frame.
    1. Release the pressure sensor hose.
    2. Slide the pressure sensor off the bracket.
    3. Cut the tie straps.
      4. NOTE: Do not oversize the seat cushion frame holes used to rivet the Occupant Classification System Module (OCSM) in place. Failure to follow this instruction may result in system failure and the incorrect operation of the Occupant Classification Sensor (OCS) system.
    4. Using a 5 mm (3/16 in) drill, remove the 3 rivets.
    5. Remove the OCSM bracket.
    6. Disconnect the service part OCSM electrical connector.
    17. Fig 5: Identifying OCS Components
    GF0013480Courtesy of FORD MOTOR CO.
    NOTE: Make note of the opening that the OCS system components are being fed through on the seat cushion support assembly for installation purposes.
  17. Remove the OCS system from the seat cushion frame.
    • Feed the hose, pressure sensor, wire harness, electrical connector and OCSM through the seat cushion frame support assembly.
    18. Fig 6: Identifying Hose, Pressure Sensor, Wire Harness, Electrical Connector And ECU
    GF0013481Courtesy of FORD MOTOR CO.
  18. If necessary, remove the 2 pin-type retainers and the mat.
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