Occupant Classification Sensor

CAUTION: There are three occupant classification sensor (OCS) system service kits available for this vehicle (base seat, heated seat and climate controlled seat). Always make sure the correct OCS service kit is installed.

CAUTION: It is necessary to rezero the OCS system when a front passenger seat cushion is disassembled, a new trim cover installed, a seat side shield removed, or an OCS service kit is installed. A scan 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 eight 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: The heated seat element on the front passenger seat cushion is not serviced 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: 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 rezero 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: REZERO." Press "DONE" (button 8) to rezero the OCS system. The NGS will return to the vehicle menu once rezeroing of the OCS system is complete.

NOTE: To rezero 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 ReZero"

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

NOTE: If the first attempt to rezero 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 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. For additional information, refer to AIR BAG RESTRAINT SYSTEMS .