Occupant Classification Sensor
OCCUPANT CLASSIFICATION SENSORPart 1:
Part 2:
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: Use 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:
- The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (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 OCS rail shown, inboard similar.
1. Remove the passenger seat and depower the system.
2. 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, connector and wiring retainers for installation.
On the affected side, detach the 2 OCS rail wiring retainers. Then using a suitable tool, release the tab and disconnect the OCS rail electrical connector.
3. If equipped, disconnect the power seat track motor electrical connector.
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. Remove the 2 rear bolts from the affected OCS rail.
6. Move the seat to the rearward most position.
- If equipped with a power seat track, apply power and ground to the pins shown.
7. NOTE: Note the position of where the locator tab 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.
Installation
NOTE: If installing a new seat track, position the seat track where the seat will be in the rearward most position before starting installation of the 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 tab to the shield.
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 tab 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. NOTE: Make sure to route the OCS rail wiring and install the 2 wiring retainers as noted during removal.
Connect the OCS rail electrical connector. Then route the OCS rail wiring and attach the 2 wiring retainers.
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.
9. Install the passenger seat and repower the supplemental restraints system (SRS). Do not prove out the SRS at this time.
10. Carry out the appropriate procedure after installation of an OCS system component.
- If installing the original OCS system component, carry out the Zero Seat Weight Test and prove out the SRS. Zero Seat Weight Test
- If installing a new OCS system component, carry out the System Reset procedure and prove out the SRS. Programming and Relearning