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Occupant Classification Sensor: Removal

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: Do not separate components.
WARNING: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.
WARNING: The safety belt pretensioner is a pyrotechnic device. Always wear safety glasses when repairing an air bag equipped vehicle and when handling a safety belt buckle pretensioner or safety belt retractor pretensioner. Never probe a pretensioner electrical connector. Doing so could result in pretensioner or air bag deployment and could result in personal injury.
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards.
WARNING: To reduce the risk of personal injury, do not use any memory saver devices.
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 scan 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: The air bag warning lamp illuminates when the restraints control module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a SRS fault.
NOTE: OCS system components (seat cushion pan, 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 pan, seat cushion foam pad are needed, a new OCS system service kit (wiring harness, seat cushion pan, 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 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 carry out the diagnostic procedure again.

    All seats 

  1. Depower the system. For additional information, refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in the General Procedures portion of this article.
  2. Remove the passenger seat. For additional information, refer to SEATING .
    CAUTION: Note the position and routing of the wiring harness(es) to aid installation. An incorrectly routed wiring harness may lead to the wires becoming damaged on the seat mechanism.
  3. Detach the safety belt buckle switch wiring harness from the underside of the cushion pan.
    Fig 1: Locating Safety Belt Buckle Switch Wiring Harness Cushion Pan
    G04655054Courtesy of FORD MOTOR CO.

    4. Heated seats 

  4. From the back of the large connector at the outboard side of the seat, release the tab at the top and remove the heated seat electrical connector insert from the large connector.
  5. Disconnect the cushion-to-backrest feed heated seat electrical connector.

    6. All seats 

  6. Disconnect the belt tension sensor and separate the connector from the cushion pan.
  7. From the back of the large connector at the outboard side of the seat, release the tab at the top and remove the 2 OCS electrical connector inserts from the large connector.
    Fig 2: Locating OCS Electrical Connector
    G04655055Courtesy of FORD MOTOR CO.
  8. Remove the 4 bolts and the front seat cushion.
    Fig 3: Locating Front Seat Cushion Bolts
    G04655056Courtesy of FORD MOTOR CO.
    CAUTION: While positioning the seat cushion pan and OCS assembly, be careful not to damage any of the components. Failure to do so can result in component failure.
  9. Detach the 3 seat trim cover J-clips.
    Fig 4: Locating Seat Trim Cover J-Clip
    G04655057Courtesy of FORD MOTOR CO.
  10. Remove the hog rings.
    Fig 5: Locating Hog Rings
    G04655058Courtesy of FORD MOTOR CO.
    CAUTION: If installing only the front passenger seat cushion trim cover, the OCS must be rezeroed.
  11. Separate the trim cover from the cushion foam pad.
    1. Roll the trim cover back to access the hog rings.
    2. Remove the hog rings and the cushion trim cover.
      Fig 6: Removing Hog Rings And Cushion Trim Cover
      G04655059Courtesy of FORD MOTOR CO.

    12. Heated seats 

    CAUTION: Remove the paper strips covering the adhesive before adhering the heater mat to the foam pad, otherwise damage to the seat may occur.
    NOTE: A new heated seat mat can be attached to a foam pad where an old heated seat mat was removed. A used heated seat mat should not be reattached to any foam pad.
  12. Separate the cushion heated seat element from the foam pad as needed.

    13. All seats 

  13. Remove the OCS as an assembly (wiring harness, seat cushion pan, seat cushion foam pad, bladder with pressure sensor and electronic control unit).
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