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Home >> Mercury >> 2007 >> Milan FWD V6-3.0L VIN 1 >> Repair and Diagnosis >> Sensors and Switches >> Sensors and Switches - Restraints and Safety Systems >> Seat Occupant Sensor >> Service and Repair

Seat Occupant Sensor: Service and Repair

OCCUPANT CLASSIFICATION SENSOR







Removal

WARNING:
- Always wear safety glasses when repairing an air bag supplemental restraint system (SRS) vehicle and when handling an air bag module. This will reduce the risk of injury in the event of an accidental deployment.
- The occupant classification sensor rails have a built-in strain gauge which may operate incorrectly if an occupant classification sensor rail is dropped by itself, dropped when installed to the front passenger seat or dropped when installed to a front passenger seat track assembly. Use care when handling an occupant classification sensor rail or when installed to the front passenger seat of front passenger seat track assembly. Failure to follow these instructions may increase the risk of personal injury or death in a crash.
- Do not disassemble the occupant classification sensor rail, tighten or loosen any of the nuts and bolts installed to the occupant classification sensor rail body. Only the 8 bolts that attach the 2 occupant classification sensor rails to the seat track should be removed and installed. Failure to follow these instructions may increase the risk of personal injury or death in a crash.
- Oil, grease, water or foreign material on or in the occupant classification sensor rail may cause the supplemental restraint system to deploy incorrectly. Never allow oil, grease, water or foreign material to get on or into the occupant classification sensor rail. Failure to follow these instructions may increase the risk of personal injury or death in a crash.
- To reduce the risk of personal injury, do not use any memory saver devices.

CAUTION: care when handling the seat and track assembly. Dropping the assembly or sitting on a seat not secured in the vehicle may result in damaged components.

NOTE:
- If a seat equipped with a SRS component is being serviced, the SRS must be depowered.
- The air bag warning lamp illuminates when the restraints control module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a SRS fault.
- The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
- Repair is made by installing a new part only. If the new part does not correct the condition, install the original part and perform the diagnostic procedure again.
- Outboard shown, inboard similar.

All occupant classification sensor (OCS) rails
1. Remove the passenger seat and depower the system.

Outboard OCS rail
2. If equipped, remove the manual lumbar control knob.
3. If equipped, remove the spring clip and the manual recliner handle.
4. Detach and position aside the cushion side shield.
- Pull the side shield away from the seat cushion at the front edge and release the forward and side retainers.
- Pull the side shield rearward to release the rear retainer and detach the cushion side shield.

Seat receiving a new OCS rail
5. Remove the bolt and the forward seat riser from the affected side occupant classification sensor (OCS) rail.
6. Remove the 2 bolts and the rearward seat riser from the affected side OCS rail.

All OCS rails







7. CAUTION: Push only on the tip of the OCS electrical connector release tab to release the electrical connector. Do not insert the tool too deep into the OCS electrical connector or damage to the electrical connector may occur.

NOTE: Note the position and the routing of the OCS rail electrical wiring and connector for installation.

On the affected side, using a suitable tool, release the tab and disconnect the OCS rail electrical connector.

8. If equipped, disconnect the power seat track motor electrical connector.







9. Move the seat to the forward most position.
- If equipped with a power seat track, apply power and ground to the pins shown.

10. Remove the 2 rear bolts from the affected OCS rail.







11. Move the seat to the rearward most position.
- If equipped with a power seat track, apply power and ground to the pins shown.

12. NOTE: Note what position the locator pin on the OCS rail goes through the OCS rail shield and into the rear mounting point of the seat track for installation.

Remove the 2 front bolts and the affected OCS rail and shield.
- Release the OCS rail shield rear tab from the OCS rail.

Installation

All occupant classification sensor (OCS) rails

NOTE: If installing a new seat track, position the seat track so the seat will be in the rearward most position before starting installation of the occupant classification sensor (OCS) rails.







1. WARNING: The occupant classification sensor rail shield is an aid to prevent foreign material and contaminants from entering the occupant classification sensor rail. Make sure the occupant classification sensor rail shield is present, is not damaged and is correctly installed to the occupant classification sensor rail. Failure to follow these instructions may increase the risk of personal injury or death in a crash.

NOTE: Make sure the OCS rail shield is seated correctly on the OCS rail. Align the locator pin to the shield and attach the OCS rail shield rear tab to the OCS rail.

Position the OCS rail shield on the OCS rail. Then position the OCS rail and shield on the seat track while noting the correct installation of the OCS rail locator pin into the seat track.







2. NOTE: To make sure of correct installation, the OCS rail bolts must be installed in the sequence shown.

While holding the OCS rail and shield firmly in position, install the OCS rail front mounting position rear bolt.
- Tighten to 25 Nm (18 lb-ft).







3. While still holding the OCS rail and shield firmly in position, install the OCS rail front mounting position front bolt.
- Tighten to 25 Nm (18 lb-ft).







4. Move the seat to the forward most position.
- If equipped with a power seat track, apply power and ground to the pins shown.

5. Install the 2 rear OCS rail bolts.
- Tighten to 25 Nm (18 lb-ft).

6. Connect the OCS rail electrical connector.







7. Center the seat track to the seat cushion pan.
- If equipped with a power seat track, apply power and ground to the pins shown.

8. If equipped, connect the power seat track motor electrical connector.

Seat receiving a new OCS rail
9. Install the rearward seat riser and the 2 bolts.
- Tighten to 25 Nm (18 lb-ft).

10. Install the forward seat riser and bolt.
- Tighten to 25 Nm (18 lb-ft).

Outboard OCS rail
11. Attach the cushion side shield.
- Position the rear retainer clip on the cushion side shield through the hole in the backrest trim cover flap and attach it to the rear edge of the seat.

12. If equipped, install the spring clip and the manual recliner handle.
13. If equipped, install the manual lumbar control knob.

All OCS rails
14. Install the passenger seat and repower the supplemental restraints system (SRS). Do not prove out the SRS at this time.
15. Carry out the appropriate procedure after installation of an OCS system component.
- If installing the original OCS system component, carry out the Occupant Classification Sensor (OCS) System Zero Seat Weight Test and prove out the SRS. Occupant Classification Sensor (OCS) System Zero Seat Weight Test
- If installing a new OCS system component, carry out the Occupant Classification Sensor (OCS) System Reset procedure and prove out the SRS. Programming and Relearning
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