Occupant Classification Sensor: Installation

WARNING: This page is about a different car, the 2005 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

All seats

WARNING: Do not separate components.

CAUTION: Inspect the occupant classification sensor assembly, seat cushion frame and support assembly for any foreign objects, before installing the occupant classification sensor assembly to the seat cushion frame. If any foreign objects are found, remove them. Failure to do so may result in personal injury, in the event of an air bag deployment.

CAUTION: Failure to route the seat occupant sensor components through the correct seat cushion support opening can cause component failure.

CAUTION: While positioning the seat cushion pan and occupant classification sensor assembly, be careful not to damage any of the components. Failure to do so can result in component failure.

NOTE: If the original equipment occupant classification sensor (OCS) is not being installed, install a service kit OCS using all parts in the kit.

Position the OCS to the seat cushion frame.
- Feed the hose, pressure sensor, wire harness, electrical connector and the ECU through the seat cushion pan assembly.
  
  Fig 1: Installing The OCS To Seat Cushion Pan
  Courtesy of FORD MOTOR CO.

NOTE: Make sure the ECU is properly secured to the bracket.

Fig 2: Installing Rivets On ECU

Courtesy of FORD MOTOR CO.

Position the ECU onto the seat cushion pan bracket and install new rivets.
Bend the retaining tab back on the pressure sensor bracket.

Fig 3: Bending Retaining Tab Back On Pressure Sensor Bracket
Courtesy of FORD MOTOR CO.

Seats with a service kit OCS

Install the seat track assembly and the 4 nuts (2 rear nuts shown), and center the OCS service kit on the seat cushion pan.
- Tighten to 36 Nm (27 lb-ft).
  
  Fig 4: Installing Seat Track Assembly Nuts
  Courtesy of FORD MOTOR CO.

Seats with a production OCS

Install the 4 nuts and the seat track assembly, and attach the 2 pin-type retainers.
- Tighten to 36 Nm (27 lb-ft).
  
  Fig 5: Installing Seat Track Assembly Nuts
  Courtesy of FORD MOTOR CO.

All seats

Connect the safety belt buckle switch electrical connector and attach the connector to the seat cushion pan.

Fig 6: Connecting Safety Belt Buckle Switch Electrical Connector
Courtesy of FORD MOTOR CO.
Attach the wire routing clip to the cushion pan and electrical connector retainer to the bracket.

Fig 7: Attaching Wire Routing Clip To Cushion Pan And Electrical Connector Retainer To Bracket
Courtesy of FORD MOTOR CO.
Install the pressure sensor onto the seat cushion pan bracket, making sure the retaining tab is completely engaged.
- When installed correctly, an audible click will be heard and the pressure sensor will not be able to be removed from its bracket without disengaging the retaining tab.
  
  Fig 8: Installing Pressure Sensor Onto Seat Cushion Pan Bracket
  Courtesy of FORD MOTOR CO.

CAUTION: Inspect the seat cushion pad and seat cushion trim cover for any foreign objects, before installing the seat cushion trim cover and the seat cushion pad. If any foreign objects are found, remove them. Failure to do so may result in personal injury, in the event of an air bag deployment.

Fig 9: Attaching Hog Rings And Hook And Loop Fasteners

Courtesy of FORD MOTOR CO.

Align the seat cushion trim cover to the seat cushion foam pad and attach the hog rings and hook and loop fasteners.
Attach the seat trim cover and foam pad.
- Attach the 5 J-clips and one pin-type retainer in the RH front corner.
  
  Fig 10: Attaching Seat Trim Cover And Foam Pad
  Courtesy of FORD MOTOR CO.
Install the seat backrest. For additional information, refer to SEAT BACKREST -- FRONT .
Install the passenger seat into the vehicle. For additional information, refer to SEAT -- FRONT .
Repower the SRS. Do not prove out the SRS at this time . For additional information, refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .

WARNING: Do not separate components.

CAUTION: 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.

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 8 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: When using a NGS+ (NGS with Vehicle Communication Module (VCM) and the latest software) to rezero the OCS system:

select "FUNCTION TEST"
select "SYSTEM RESET"
view the on-screen information then press "TRIGGER"

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"

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

The NGS+ screen will then display "OCS RESET: REZERO." Press "DONE" (button 8) to rezero the OCS system. The NGS+ will display "TEST/FUNCTION SUCCESSFUL" once rezeroing of the OCS system is complete.
After selecting "Seat Weight Sensor ReZero", follow the on-screen prompts to carry out rezeroing of the OCS system.

Rezero the occupant classification sensor.
- With the front passenger seat empty, use a diagnostic tool to trigger the active command and rezero the OCS.

NOTE: The ignition switch must be cycled after rezeroing the OCS system.

Cycle the ignition switch from ON to OFF.
Prove out the SRS as follows:
Turn the ignition key from ON to OFF. Wait 10 seconds, then turn the key 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 indicator will:
- fail to light.
- remain lit continuously.
- flash.
The flashing might not occur until approximately 30 seconds after the ignition switch has been turned from the OFF to the ON position. This is the time required for the restraints control module (RCM) to complete the testing of the SRS. If the air bag 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 indicator and any SRS fault discovered must be diagnosed and repaired.

Clear all continuous DTCs from the RCM using a scan tool.
Check the active restraint system for correct operation. For additional information, refer to SAFETY BELT SYSTEM .

NOTE: When installing a new OCS, a prepaid return postcard is provided with the new OCS. The serial number for the new part and the vehicle identification number (VIN) must be recorded and sent to Ford Motor Company.

If a new OCS was installed, fill out the necessary information on the OCS traceability card and return it along with the complete inoperative occupant classification sensor to Ford Motor Company.
- When returning the inoperative OCS include: seat cushion foam pad, bladder, electronic control unit, pressure sensor (transducer), hose, electrical connectors and wire harness (service part OCS only).
  
  Fig 11: Identifying OCS Traceability Card
  Courtesy of FORD MOTOR CO.