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Occupant Classification Sensor: Installation

WARNING: This page is about a different car, the 2009 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Inspect the Occupant Classification Sensor (OCS) system assembly, seat cushion frame and support assembly for any foreign objects before installing the OCS  system assembly to the seat cushion frame. If any foreign objects are found, remove them. Failure to follow these instructions may result in incorrect OCS  system operation or failure.
    NOTE: Failure to route the Occupant Classification Sensor (OCS) components through the correct seat cushion support opening can cause component failure.
    NOTE: While positioning the seat cushion pan and Occupant Classification Sensor (OCS) assembly, be careful not to damage any of the components. Failure to do so may result in component failure.
    NOTE: If the original equipment OCS  system is not being installed, install a OCS  system service kit using all parts in the kit.
  1. Position the OCS  system to the seat cushion frame.
    • Route the OCS  system bladder hose and pressure sensor, OCSM  and seat wiring harness through the seat cushion pan opening.
    2. NOTE: An Occupant Classification Sensor (OCS) system service kit has the OCS  bladder attached to the seat cushion foam pad. Do not separate the OCS  system bladder from the seat cushion foam pad. Failure to do so may result in component failure.
  2. Install the 3 OCS  system bladder pin-type retainers to the seat cushion frame.
  3. Install the OCSM  .
    • Slide the OCSM  back on the OCSM  bracket until it is fully seated and locked in past the OCSM  bracket retainer.
    • Install the 2 screws in the OCSM  .
  4. Slide the pressure sensor on the bracket until it is fully seated and locked past the bracket retainer.
    Fig 1: Locating Pressure Sensor Bracket Retainer
    G06182816Courtesy of FORD MOTOR CO.
  5. Install the 2 seat wiring harness routing clips to the seat cushion frame.
    6. NOTE: Inspect the seat cushion pad and seat cushion trim cover for any foreign objects, before installing the seat cushion trim cover to the seat cushion pad. If any foreign objects are found, remove them. Failure to follow these instructions may result in incorrect operation of the Occupant Classification Sensor (OCS) system and may cause system failure.
    Fig 2: Locating Hog Rings
    G06182756Courtesy of FORD MOTOR CO.
  6. Position the cushion trim cover to the foam pad and install the hog rings.
  7. Install the foam pad and cushion trim cover to the cushion frame and fasten the J-clips.
    Fig 3: Locating Cushion Trim Cover J-Clips
    G06182755Courtesy of FORD MOTOR CO.
  8. Install the seat track assembly and 4 bolts.
    • Tighten to 6 Nm (53 lb-in).
  9. Attach the seat cushion trim cover rear J-clip.
  10. Install the seat wiring harness retainer clip and attach the seat wiring harness connector to the seat cushion frame.
    Fig 4: Locating Seat Wiring Harness Retainer Clip And Seat Wiring Harness Connector
    G06182754Courtesy of FORD MOTOR CO.
  11. Install the front seat backrest. For additional information, refer to SEATING .
  12. Install the passenger seat. For additional information, refer to SEATING .
  13. Repower the SRS  . Do not prove out the SRS at this time.  For additional information, refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    14. 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: To prevent system failure, the following precautions must be taken before carrying out the Occupant Classification Sensor (OCS) system reset:
    • Make sure the voltage to the Occupant Classification System Module (OCSM) is above 8 volts and less than 18 volts.
    • Make sure the Occupant Classification Sensor (OCS) system is not at a temperature below 6°C (42°F) or above 36°C (97°F) when initiating the OCS  system reset 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, 6°C to 36°C (42°F to 97°F) for a minimum of 30 minutes.
    • Make sure nothing is present on the passenger seat before carrying out the OCS  system reset and nothing is placed on the seat during the process.
    • Make sure a minimum 8-second time period has passed after cycling the ignition ON before the carrying out the OCS  system reset.
  14. Carry out the Occupant Classification Sensor (OCS) System Reset.
  15. If the first system reset attempt was unsuccessful, carry out a thorough visual inspection of the following and repair any concerns found.
    • OCS  system connector wiring for damage
    • Pressure sensor hose for kinks and/or damage
    • Seat-related wiring harness and body wiring harness terminals and connectors for damage
  16. Carry out a second OCS  system reset. If the second attempt is unsuccessful, install a new OCS  system service kit.
  17. Cycle the ignition from ON to OFF.
    18. NOTE: The ignition must be cycled after the OCS  system reset.
  18. Cycle the ignition from OFF to ON.
  19. Prove out the SRS  as follows:

    Turn the ignition from ON to OFF. Wait 10 seconds, then turn the ignition 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 SRS  fault is present, the air bag warning indicator will:

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

    The air bag warning indicator may not illuminate until approximately 30 seconds after the ignition has been turned from the OFF to the ON position. This is the time required for the to complete the testing of the SRS  . If the air bag warning 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 warning indicator and any SRS  fault discovered must be diagnosed and repaired.

    Clear all continuous RCM  and OCSM  DTCs using a scan tool.

    20. NOTE: A prepaid return postcard is provided with a new OCS  system service kit. The serial number for the new part and the Vehicle Identification Number (VIN) must be recorded and sent to Ford Motor Company.
  20. If a new OCS  system was installed, fill out the necessary information on the OCS  system traceability card and return it along with the complete inoperative OCS  system to Ford Motor Company.
    • When returning the inoperative OCS  system include: seat cushion foam pad, bladder, OCSM  , pressure sensor (transducer), hose, electrical connectors and wire harness (service part OCS  system only).
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