Occupant Classification Sensor: Notes

WARNING: This page is about a different car, the 2002 Ford Windstar. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: If installing only the front passenger seat cushion trim cover, the seat occupant classification sensor (OCS) must be re-zeroed.

CAUTION: The following precautions must be taken before re-zeroing of the OCS system.

Make sure the OCS system components are connected and no faults are present.
Make sure the vehicle has not been exposed to temperatures below 6°C (42°F) or above 36°C (97°F) within four hours prior to the re-zeroing process. If the vehicle has been exposed to temperatures outside the temperature limits (6-36°C [42-97°F]), the vehicle must be exposed to and kept at a temperature within the limits for minimum of four hours.
Make sure nothing is present on the passenger seat before re-zeroing and nothing is placed on the seat during the re-zeroing process.
Make sure a minimum five second time period has passed after cycling the ignition switch ON before the re-zeroing process.

NOTE: It is necessary to re-zero the 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 re-zeroing of the OCS system.

NOTE: When using a New Generation STAR (NGS) tester you must use the appropriate memory card with the latest update to carry out this function. To re-zero the OCS system:

select "SERVICE BAY FUNCTIONS"
select "RCM"
select "SYSTEM RESET"
select the vehicle from the menu
view the on-screen information then press "TRIGGER"

The NGS screen will then display "OCS RESET: re-zero." Press "DONE" (button 8) to re-zero the OCS system. The NGS will return to the vehicle menu once re-zeroing of the OCS system is complete.

NOTE: To re-zero the OCS system using the Worldwide Diagnostic System (WDS):

select the "Toolbox" icon
select "Body" from the menu
select "Restraints" from the menu
select "Seat Weight Sensor re-zero"

After selecting "Seat Weight Sensor re-zero", follow the on-screen prompts to carry out re-zeroing of the OCS system.

NOTE: If the first attempt to re-zero the OCS system is unsuccessful, a second attempt must be made.

The seat occupant classification sensor system is found only on the front passenger seat. The OCS system components (seat cushion foam pad, bladder, bladder with pressure sensor and electronic control unit) are calibrated to each other and are serviced as an assembly. OCS system components are not to be installed separately. If installing a new OCS system, OCS system component or seat cushion foam pad, a new OCS system service kit (seat cushion foam pad, bladder with pressure sensor and electronic control unit) must be installed as an assembly. Refer to AIR BAG RESTRAINT SYSTEMS .