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Occupant Classification Sensor (OCS) System Reset

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
Special Tools

Illustration Tool Name Tool Number
GF0000049
 Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool
WARNING: The following precautions must be taken before carrying out the following procedure on the front passenger seat:
  • Park the vehicle on level ground.
  • Make sure the occupant classification sensor (OCS) system is stabilized at a temperature in the range of 5°C to 48°C (41°F to 118°F) and is not exposed to temperatures outside that range.
  • Make sure the front passenger seat is empty and dry.
  • Make sure the front passenger seat repair is complete and all attached components (head restraint, seat side shield) are correctly installed.
  • Make sure nothing is placed in the map pockets (if equipped) of the front passenger seat.
  • Make sure nothing is underneath the front passenger seat.
  • Make sure no non-factory installed items (seat covers, DVD screens) are on or contacting the front passenger seat. If any non-factory items were installed to the seat, remove the item(s) and communicate to the customer that any alteration/modification to the front passenger seat may affect performance of the OCS system. Refer to the Owner's Literature.
  • Make sure the seat is correctly installed in the vehicle.

Failure to follow these instructions may result in incorrect operation of the OCS system and increases the risk of serious personal injury or death in a crash.

CAUTION: Make sure the occupant classification sensor (OCS) system weight sensor bolt protection brackets are correctly installed to the seat track and that it does not contact the cushion side shield, wire harness or any other surrounding parts. Failure to follow this instruction may result in the incorrect operation of the OCS system.
NOTE: The supplemental restraint system (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
NOTE: The System Reset active command calibrates the system components and resets the zero point of the occupant classification sensor (OCS) system.
NOTE: If the occupant classification sensor (OCS) module has any on-demand diagnostic trouble codes (DTCs) except B1013 or C1941 present, the fault condition must be repaired and the DTC(s) cleared before carrying out the System Reset on the front passenger seat. Failure to follow this instruction will result in an unsuccessful System Reset and the incorrect operation of the OCS system.
NOTE: The System Reset active command should only be carried out as directed by the workshop manual after installing a new OCS component.
    WARNING: The following precautions must be taken before carrying out the following procedure on the front passenger seat:
    • Park the vehicle on level ground.
    • Make sure the occupant classification sensor (OCS) system is stabilized at a temperature in the range of 5°C to 48°C (41°F to 118°F) and is not exposed to temperatures outside that range.
    • Make sure the front passenger seat is empty and dry.
    • Make sure the front passenger seat repair is complete and all attached components (head restraint, seat side shield) are correctly installed.
    • Make sure nothing is placed in the map pockets (if equipped) of the front passenger seat.
    • Make sure nothing is underneath the front passenger seat.
    • Make sure no non-factory installed items (seat covers, DVD screens) are on or contacting the front passenger seat. If any non-factory items were installed to the seat, remove the item(s) and communicate to the customer that any alteration/modification to the front passenger seat may affect performance of the OCS system. Refer to the Owner's Literature.
    • Make sure the seat is correctly installed in the vehicle.

    Failure to follow these instructions may result in incorrect operation of the OCS system and increases the risk of serious personal injury or death in a crash.

  1. Make sure the front passenger seat is empty and there is nothing underneath the seat. Remove any items from the seat that were not factory installed and make sure that the seat is correctly installed in the vehicle. For additional information, refer to Occupant Classification Sensor (OCS) System in Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) .
  2. Position the front passenger seat.
    • Position the seat backrest in the upright position.
    • Position the seat in the middle position of seat track travel.
    • Position the seat height to its middle position (power seat only).
  3. Remove hysteresis from the front passenger seat by firmly hitting the back of the seat head restraint 3 times.
    4. NOTE: Make sure a minimum 8-second time period has passed after cycling the ignition switch ON before carrying out the System Reset active command.
  4. Turn the ignition switch ON, wait 8 seconds and carry out the System Reset using the scan tool.
  5. Inspect the following for causes of a unsuccessful System Reset.
    • Make sure the front passenger seat is empty and there is nothing underneath the seat. Remove any items from the seat that were not factory installed and make sure that the seat is correctly installed in the vehicle.
    • Make sure the seat wiring harnesses are routed and secured correctly and are not twisted, pinched, pulling down or pushing up on any seat component. Refer to Seat Cushion Wire Harness Routing - Front Passenger Cushion in the General Procedures portion of SEATING .
    • Make sure the OCS weight sensor bolt protection brackets are correctly installed to the seat track and are not contacting the cushion side shield, wire harness or any other surrounding parts.
    • Make sure the seat track and backrest frame are not bent, twisted or damaged.
    • Move the seat and backrest to all seating positions. Make sure the seat track does not bind or have any resistance when moved to all seating positions. Make sure that there are no obstructions contacting any seat component when the seat is moved to all seating positions.
    • Make sure the seat is assembled correctly and all fasteners are tightened to specifications.
      • If a concern was found, repair as necessary, proceed to Step 1.
      • If no concern was found, install a new passenger seat track assembly with OCS weight sensor bolts. Refer to SEATING .
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