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Occupant Classification Sensor - Original Equipment: Removal

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
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.
WARNING: To reduce the risk of personal injury, do not use any memory saver devices.
WARNING: Do not separate components.
CAUTION: It is necessary to rezero the occupant classification sensor (OCS) system when a front passenger seat cushion is disassembled, a new trim cover installed, or an OCS service kit is installed. A diagnostic tool is used to trigger the active command to carry out rezeroing of the OCS system.
NOTE: If a seat equipped with a SRS component is being serviced, the SRS must be depowered.
NOTE: OCS system components (seat cushion foam pad, bladder with pressure sensor and electronic control unit) are calibrated to each other and are serviced as an assembly. The OCS system components are not to be installed separately. If a new OCS system, OCS system component or seat cushion foam pad are needed, a new OCS system service kit (seat cushion foam pad, bladder with pressure sensor and electronic control unit) must be installed as an assembly.
NOTE: To identify between a production OCS system and a service OCS system (OCS service kit), inspect the electronic control unit (ECU) electrical connector.  A production OCS system allows the disconnect of the ECU electrical connector. A service OCS system (OCS service kit) has the ECU electrical connector glued to the ECU. 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 occupant classification sensor (OCS) service kit and a new heated seat element must be installed.
NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. 
NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
NOTE: Repair is made by installing a new part only. If the new part does not correct the condition, install the original part and perform the diagnostic procedure again.
NOTE: If removing an OCS service kit, refer to OCCUPANT CLASSIFICATION SENSOR - SERVICE KIT .
NOTE: Power seat shown, manual seat similar.

    All seats 

  1. Position the seat to access all the seat track-to-floor pan bolts and the safety belt anchor.
  2. Depower the supplemental restraint system (SRS). For additional information, refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
  3. Remove the passenger seat. For additional information, refer to SEATING .

    4. Seats with manual recline 

  4. Pull out and remove the recline handle.

    5. Seats with power 

  5. Remove the power seat switch knobs.

    6. All seats 

  6. Remove the rear screw, pull out on the side and front and separate the side shield.
    • Vehicles with manual seats, remove the side shield.

    7. Seats with power 

  7. Remove the power seat control switch, and remove the side shield.

    8. Seats with heat 

  8. Disconnect the heated seat electrical connector.

    9. All seats 

  9. Release all the seat cushion trim cover J-clips.
  10. Release the hook and loop strip at the rear of the seat cushion, and then remove the seat cushion foam pad and trim cover.
  11. Remove the hog rings and separate seat cushion trim cover from the seat cushion foam pad.
    Fig 1: Locating Hog Rings For Seat Cushion Trim Cover
    G03988965Courtesy of FORD MOTOR CO.
  12. Disconnect the pressure sensor electrical connector, bend and release the retaining tab and slide the pressure sensor off the bracket.
    Fig 2: Disconnecting Pressure Sensor Electrical Connector
    G03988909Courtesy of FORD MOTOR CO.
  13. Disconnect the electronic control unit (ECU) electrical connector.
    Fig 3: Disconnecting Electronic Control Unit (ECU) Electrical Connector
    G03989879Courtesy of FORD MOTOR CO.
  14. Remove the OCS bladder pin type retainers.
    Fig 4: Removing OCS Bladder Pin Type Retainers
    G03988969Courtesy of FORD MOTOR CO.
    15. NOTE: Make note of the routing and the opening that the pressure sensor and hose are being fed through on the seat cushion support assembly for installation purposes.
    Fig 5: Removing OCS Bladder, Hose And Pressure Sensor From Seat Cushion Frame
    G03988970Courtesy of FORD MOTOR CO.
  15. Remove the OCS bladder, hose and pressure sensor from the seat cushion frame.
  16. Remove the rivets and the ECU from the seat cushion frame bracket.
    Fig 6: Removing Rivets And ECU From Seat Cushion Frame Bracket
    G03989882Courtesy of FORD MOTOR CO.
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