Air Bag Systems: Service and Repair

Occupant Classification Sensor (OCS) System Reset

Special Tool(s)







WARNING:
The following precautions must be taken before carrying out the following procedure on the front passenger seat:
- Park the vehicle on level ground.
- Make sure the occupant classification system (OCS) is stabilized at a temperature in the range of 5° C to 48° C (41° F to 118° F) and is not exposed to temperatures outside that range.
- Make sure the front passenger seat is empty and dry.
- Make sure the front passenger seat repair is complete and all attached components (head restraint, seat side shield) are correctly installed.
- Make sure nothing is placed in the map pockets (if equipped) of the front passenger seat.
- Make sure nothing is underneath the front passenger seat.
- Make sure no non-factory installed items (seat covers, DVD screens) are on or contacting the front passenger seat. If any non-factory items were installed to the seat, remove the item(s) and communicate to the customer that any alteration/modification to the front passenger seat may affect performance of the OCS. Refer to the Owner's Literature.
- Make sure the seat is correctly installed in the vehicle.

Failure to follow these instructions may result in incorrect operation of the OCS and increases the risk of serious personal injury or death in a crash.

After Deployment

NOTE: After installation of new OCS system components and completion of Inspection and Repair After a Supplemental Restraint System (SRS) Deployment, the OCSM will have DTCs stored in memory. These DTCs will clear after a successful System Reset.

1. Check that all steps have been carried out as outlined in the Inspection and Repair After a Supplemental Restraint System (SRS) Deployment procedure.
2. If no concerns are found, proceed to Step 4 to carry out the System Reset.

No Deployment

NOTE: After installation of new OCS system components (seat track assembly or OCSM), the OCSM will have DTCs stored in memory. These DTCs will clear after a successful System Reset.

3. Carry out the RCM self-test. If DTC B00A0:09 is retrieved on-demand, retrieve OCSM DTCs.
- If DTCs are retrieved on-demand in the OCSM and NO new components have been installed, refer to the Occupant Classification System Module (OCSM) DTC Chart for diagnostic direction.
- If no DTCs are retrieved on-demand in the OCSM, CLEAR the DTC from the RCM and carry out the System Reset.

OCS System Reset

4. Turn the ignition to the OFF position.
5. Prepare the passenger seat for a System Reset and make sure:
- the OCS weight sensor bolt harness connections are correct for each sensor at the correct locations. Refer to Wiring Diagrams cell 46 for schematic and connector information. Refer to the illustration for correct sensor location on the seat.
- the seat wiring harnesses are routed and secured correctly and are not twisted, pinched, pulling down or pushing up on any seat component. Refer to Seat Wire Harness Routing.
- all seat fasteners have been tightened to specification as identified.
- the seat track is correctly aligned (manual seat track) - check the seat track fastener hole alignment, lift the seat adjust bar to align the holes in the track bracket to the holes in the floor.
- the seat is correctly installed in the vehicle.
- the passenger safety belt buckle is unbuckled.
- the front passenger seat is empty and there is nothing underneath the seat. Remove any items from the seat that were not factory installed.
- the seat backrest is in the upright (vertical) position.
- the seat is at the mid-point of the seat track travel.
- the seat height is in its middle position (power seat only).
- the hysteresis has been removed from the front passenger seat by firmly hitting the back of the seat head restraint 3 times.
- the vehicle electrical system voltage is below 18 volts and above 11.5 volts before continuing with the OCS System Reset.







6. Turn the ignition ON, wait 8 seconds.
7. Carry out the OCS System Reset.
- If the System Reset was successful, carry out the Occupant Classification System (OCS) Zero Seat Weight Test. Refer to Occupant Classification Sensor (OCS) System Zero Seat Weight Test.
- If the System Reset was unsuccessful, proceed to Step 8.

8. NOTE: Do not install any new OCS system components at this time. OCS system components should only be installed when directed to do so.

Carry out the OCSM self-test.
- If DTC B00A0: 54 is retrieved on-demand, refer to the DTC Charts for diagnostic direction of this DTC.
- If any other DTCs are retrieved on-demand from the OCSM, proceed to Step 9.

9. Inspect all the items listed in Step 5 for causes of an unsuccessful System Reset, repair as necessary. Retest the system.
10. If the System Reset was successful, carry out the Occupant Classification Sensor (OCS) System Zero Seat Weight Test.
If the System Reset was unsuccessful, install a new passenger seat track assembly.