Seat Occupant Sensor: Service and Repair
Occupant Classification Sensor
NOTE: Outboard shown, inboard similar.
Removal
WARNING: Use care when handling the front passenger seat and track assembly. Dropping the assembly, placing excessive weight on or sitting on a front passenger seat that is not secured in the vehicle may result in damaged seat components. Failure to follow these instructions may result in incorrect operation of the occupant classification system (OCS) and increases the risk of serious personal injury or death in a crash.
NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition switch is ON.
NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
All Occupant Classification System (OCS) weight sensor assemblies
1. Remove the passenger seat. For additional information, refer to Seating Seat - Front.
Outboard OCS weight sensor assembly
2. If equipped, remove the manual lumbar control knob.
3. If equipped, remove the spring clip and the manual recliner handle.
4. NOTICE: Do not reinstall the cushion side shield or side shield retainers after removal. These are one-time-use items that become damaged during removal and may not remain attached if reinstalled. Install a new side shield (includes new retainers attached).
Remove and discard the cushion side shield.
- If equipped, remove the scrivet.
- Pull out on the side and rear of the cushion side shield and release the retainers.
- Separate the wire harness from the cushion side shield.
- Remove the side shield and any remaining side shield retainers from the seat and discard.
Seat receiving a new OCS weight sensor assembly
5. Remove the bolt and the forward seat riser from the affected side OCS weight sensor assembly.
6. Remove the 2 bolts and the rearward seat riser from the affected side OCS weight sensor assembly.
All OCS weight sensor assemblies
7. NOTE: Note the position and the routing of the OCS system electrical wiring and connector for installation.
On the affected side, disconnect the OCS weight sensor assembly 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 weight sensor assembly.
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. Remove the 2 front bolts and the OCS weight sensor assembly.
Installation
All Occupant Classification System (OCS) weight sensor assemblies
NOTE: If installing a new seat track, position it so the seat will be in the rearward most position before installing the OCS weight sensor assembly.
1. NOTE: To make sure of correct installation, the OCS weight sensor assembly bolts must be installed in the sequence shown.
While holding the OCS weight sensor assembly firmly in position, install the OCS weight sensor assembly front mounting position rear bolt.
- Tighten to 25 Nm (18 lb-ft).
2. While still holding the OCS weight sensor assembly firmly in position, install the OCS weight sensor assembly front mounting position front bolt.
- Tighten to 25 Nm (18 lb-ft).
3. Move the seat to the forward most position.
- If equipped with a power seat track, apply power and ground to the pins shown.
4. Install the 2 rear OCS weight sensor assembly bolts.
- Tighten to 25 Nm (18 lb-ft).
5. Connect the OCS weight sensor assembly electrical connector.
6. Center the seat track to the seat cushion pan.
- If equipped with a power seat track, apply power and ground to the pins shown.
7. If equipped, connect the power seat track motor electrical connector.
Seat receiving a new OCS weight sensor assembly
8. Install the rearward seat riser and the 2 bolts.
- Tighten to 25 Nm (18 lb-ft).
9. Install the forward seat riser and bolt.
- Tighten to 25 Nm (18 lb-ft).
Outboard OCS weight sensor assembly
10. NOTICE: Do not reinstall the cushion side shield or side shield retainers after removal. These are one-time-use items that become damaged during removal and may not remain attached if reinstalled. Install a new side shield (includes new retainers attached).
Install a new cushion side shield.
11. If equipped, install the spring clip and the manual recliner handle.
12. If equipped, install the manual lumbar control knob.
All OCS weight sensor assemblies
13. Install the passenger seat. Do not prove out the SRS at this time. For additional information, refer to Seating Seat - Front.
14. Carry out the Occupant Classification System (OCS) System Reset procedure and prove out the SRS. For additional information, refer to Occupant Classification Sensor (OCS) System Reset Programming and Relearning.