Seats: Description and Operation

SEATS

OCCUPANT CLASSIFICATION SENSOR

CAUTION:
- If installing only the front passenger seat cushion trim cover, the seat occupant classification sensor (OCS) must be rezeroed.
- The following precautions must be taken before rezeroing 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 rezeroing process. If the vehicle has been exposed to temperatures outside the temperature limits (6-36°C), 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 rezeroing and nothing is placed on the seat during the rezeroing process.
- Make sure a minimum five second time period has passed after cycling the ignition switch ON before the rezeroing process.

NOTE:
- 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 scan tool is used to trigger the active command to carry out rezeroing of the OCS system.
- When using a New Generation Star (NGS) tester, the OCS system rezero function is on the Ford Service Function (red) card. 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, 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, bladder with pressure sensor and electronic control unit) must be installed as an assembly.

Lumbar Support
The optional lumbar support system consists of the following components:
- lumbar seat control switch
- front seat backrest pad adjuster

Power Recliner
The optional power recliner is a modular design and incorporated into the inertia front seat backrest latch. The individual components cannot be repaired or installed new.

The power recliner tilts the seat backrest backward or forward and is controlled by the seat regulator control switch.

The power recliner cannot be repaired separately. If the power recliner needs to be repaired, the entire front seat backrest latch must be installed new.

Heated Seat
Each heated seat is controlled by a switch on the door trim panel.

The heated seat system:
- will only operate with the ignition switch in RUN.
- will operate with battery voltage as low as 9 volts.
- will maintain a temperature automatically once it is selected.
- will heat to the selected temperature each time the ignition switch is turned to RUN if the heated seat is not switched OFF.

Seat side air bag

Optional driver and passenger seat side air bags are attached to the seat backrest frame. For diagnostic information or if the seat side air bag has been deployed, refer to Air Bag Systems.

Front seat backrest trim covers installed on seats with seat side air bags cannot be repaired. The front seat backrest trim covers are to be installed new. Cleaning is permissible.

If a seat side air bag deployment took place, a new seat back pad, trim cover and seat side air bag module must be installed. Install a new seat back frame, if necessary.