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Occupant Classification Sensor: Installation

    All seats 

    NOTE: ECU is removed for clarity.
    Fig 1: Locating Belt Tension Sensor Wire Harness
    G04655060Courtesy of FORD MOTOR CO.
  1. Make sure the belt tension sensor wire harness is routed between the OCS electronic control unit and the mounting bracket.

    2. Heated seats 

    CAUTION: Remove the paper strip covering the adhesive before adhering the heater mat to the foam pad. Otherwise damage to the seat can occur.
    Fig 2: Locating Paper Strips
    G04655061Courtesy of FORD MOTOR CO.
  2. Remove the paper strips at the rear of the cushion heated seat element.
  3. Center and align the cushion heated seat element to the rear edge of the cushion foam pad. Adhere the rear of the cushion heated seat element to the cushion foam pad.
    • Make sure the heater element ear openings align to the cushion foam pad front wire windows at each side for trim cover installation.
      Fig 3: Locating Cushion Foam Pad Front Wire Windows
      G04655062Courtesy of FORD MOTOR CO.
  4. Tuck the cushion heated seat element into the cushion foam pad rear trench.
    Fig 4: Locating Cushion Heated Seat Element
    G04655063Courtesy of FORD MOTOR CO.
    CAUTION: Remove the paper strip covering the adhesive before adhering the heater mat to the foam pad. Otherwise damage to the seat can occur.
  5. Remove the paper strip at the front of the cushion heated seat element.
    Fig 5: Locating Paper Strip
    G04655064Courtesy of FORD MOTOR CO.
  6. Adhere the front of the cushion heated seat element to the cushion foam pad. Tuck the 2 cushion heated seat element side ears into the cushion foam pad side trenches.
    Fig 6: Locating Cushion Heated Seat Element Side Ears
    G04655065Courtesy of FORD MOTOR CO.

    7. All seats 

    CAUTION: Inspect the components for any foreign objects before installing the seat cushion trim cover. If any foreign objects are found, remove them. Failure to do so may result in personal injury, in the event of an air bag deployment.
  7. Attach the cushion trim cover to the cushion foam pad.
    1. Position the cushion trim cover to the cushion foam pad
    2. Install the hog rings.
      • If the seat is equipped with heat, make sure the hog rings attaching the wires from the cushion foam pad and cushion trim cover are attached through the cushion heated seat element windows.
        Fig 7: Identifying Hog Rings
        G04655066Courtesy of FORD MOTOR CO.
  8. Attach the trim cover to the seat cushion pan with hog rings.
    Fig 8: Locating Hog Rings
    G04655067Courtesy of FORD MOTOR CO.
  9. Attach the 3 seat trim cover J-clips.
    Fig 9: Locating Seat Trim Cover J-Clip
    G04655068Courtesy of FORD MOTOR CO.
  10. Install the 4 bolts and the front seat cushion.
    • Tighten to 28 Nm (21 lb-ft).
      Fig 10: Locating Bolts And Front Seat Cushion
      G04655069Courtesy of FORD MOTOR CO.
  11. Connect the 2 OCS electrical connector inserts back into the large connector.
    Fig 11: Locating OCS Electrical Connector
    G04655070Courtesy of FORD MOTOR CO.
  12. Connect the belt tension sensor and attach the connector to the cushion pan.

    13. Heated seats 

  13. Install the heated seat electrical connector insert into the large connector.
  14. Connect the cushion to backrest feed heated seat electrical connector.

    15. All seats 

  15. Attach the safety belt buckle switch wiring harness from the underside of the cushion.
    Fig 12: Locating Safety Belt Buckle Switch Wiring Harness
    G04655071Courtesy of FORD MOTOR CO.
  16. Install the passenger seat. For additional information, refer to SEATING .
  17. Repower the system. Do not prove out the SRS at this time  . For additional information, refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in the General Procedures portion of this article.
    WARNING: Do not separate components.
    CAUTION: 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 diagnostic tool is used to trigger the active command to carry out rezeroing of the OCS system.
    CAUTION: Make sure the seat is completely assembled before rezeroing.
    CAUTION: The following precautions must be taken before rezeroing the OCS system:
    • Make sure the OCS system components are connected and no faults are present.
    • Make sure the OCS system is not at a temperature below 0°C (32°F) or above 45°C (113°F) when initiating the rezeroing process. If the vehicle has been exposed to extreme cold or hot temperatures, the vehicle must be exposed and kept at a temperature within the limits, 0°C to 45°C (32°F to 113°F) for a minimum of 30 minutes.
    • 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 8 second time period has passed after cycling the ignition switch ON before the rezeroing process.
    NOTE: For best results in rezeroing, the OCS system should be at or near room temperature, 10°C to 29°C (50°F to 85°F).
    NOTE: If the first attempt to rezero the OCS system is unsuccessful, a second attempt must be made.
  18. Rezero the occupant classification sensor.
    • With the front passenger seat empty, use a diagnostic tool to trigger the active command and rezero the occupant classification sensor.
    NOTE: The ignition switch must be cycled after rezeroing the OCS system.
  19. Cycle the ignition switch from ON to OFF.
  20. Prove out the supplemental restraint system (SRS) as follows:

    Turn the ignition key from ON to OFF. Wait 10 seconds, then turn the key back to ON and visually monitor the air bag indicator with the air bag modules installed. The air bag indicator will light continuously for approximately 6 seconds and then turn off. If an air bag supplemental restraint system (SRS) fault is present, the air bag indicator will:

    • fail to light.
    • remain lit continuously.
    • flash at a 5 Hz rate (RCM not configured).

    The air bag indicator may not illuminate until approximately 30 seconds after the ignition switch has been turned from the OFF to the ON position. This is the time required for the restraints control module (RCM) to complete the testing of the SRS. If the air bag indicator is inoperative and a SRS fault exists, a chime will sound in a pattern of 5 sets of 5 beeps. If this occurs, the air bag indicator and any SRS fault discovered must be diagnosed and repaired.

    Clear all continuous DTCs from the restraints control module using a diagnostic tool.

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