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Occupant Classification Sensor - Original Equipment: Removal

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Install a new occupant classification sensor (OCS) system service kit as a complete assembly. Never install only part of the kit components. Failure to follow this instruction may result in incorrect operation of the OCS system and increases the risk of serious personal injury or death in a crash.
NOTE: To prevent system failure, 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 installed or an OCS system service kit is installed. A scan tool is used to carry out the OCS system reset command.
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 equipped with a heated seat element must be installed.
NOTE: Occupant Classification Sensor (OCS) system components, seat cushion foam pad, bladder with pressure sensor and OCSM, 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 OCSM) must be installed as an assembly.
NOTE: To identify between a production Occupant Classification Sensor (OCS) system and a service OCS system (OCS service kit), inspect the electrical connector.  A production OCS system allows the disconnect of the OCSM electrical connector. A service OCS system (OCS service kit) has the electrical connector glued to the OCSM. It cannot and should not be disconnected or altered.
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.
  1. Depower the SRS. For additional information, refer to Supplemental Restraint System (SRS) Depowering and Repowering .
  2. Remove the passenger seat. For additional information, refer to SEATING article.
  3. Disconnect the electrical connectors and detach the wiring clips.
    1. Disconnect the Occupant Classification System Module (OCSM) electrical connector.
    2. Disconnect the pressure sensor electrical connector.
    3. Release the 2 wiring clips on the wiring harness from the seat cushion pan.
    4. If equipped with heated seats, disconnect the heated seat relay electrical connector, release the wiring clip on the wiring harness from the seat cushion pan, and disconnect the 2 seat cushion element electrical connectors.
    4. Fig 1: Identifying Connectors And Seat Cushion Pan
    GF0041976Courtesy of FORD MOTOR CO.
  4. Remove the 4 seat cushion bolts retaining the seat cushion to the seat track.
    5. NOTE: While positioning the seat cushion pan and Occupant Classification Sensor (OCS) assembly, be careful not to damage any of the components. Failure to follow these instructions may result in incorrect operation of the OCS system and may cause system failure.
  5. Remove the seat cushion and pan assembly.
    • To aid in removal, recline the seat.
    6. NOTE: Use care when separating the seat upholstery from the hook-and-loop strip, or the hook-and-loop strip can be torn from the seat cushion foam pad.
  6. Detach the seat cushion trim cover J-clips from the seat cushion pan and remove the seat cushion trim cover.
    7. Fig 2: Seat Cushion Trim Cover J-Clips
    GF0024004Courtesy of FORD MOTOR CO.
  7. Remove the seat cushion foam pad.
  8. Bend the retaining tab away from the pressure sensor, then slide the pressure sensor off the bracket.
    9. Fig 3: Pressure Sensor Retaining Tab
    GF0024005Courtesy of FORD MOTOR CO.
    NOTE: Care must be taken to prevent damage to the seat cushion pan when removing the rivets.
  9. Remove the 2 rivets and the OCSM.
  10. Remove the 2 pin-type retainers from the OCS bladder and seat cushion pan.
  11. Feed the OCS hose and pressure sensor through the seat cushion pan opening and remove as an assembly with the bladder.
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