Programming and Relearning
Occupant Classification Sensor (OCS) System Reset
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 sensor (OCS) system 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 system. 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 system and increases the risk of serious personal injury or death in a crash.
NOTICE: Correct seat track alignment of the inboard and outboard seat tracks on a manual seat is critical for a successful System Reset. Before removing a front passenger seat equipped with a manual seat track, mark both tracks to indicate correct alignment between the inboard and outboard tracks.
The passenger safety belt buckle must be unbuckled before proceeding with the OCS System reset.
Failure to follow these instructions will result in an unsuccessful system reset and incorrect operation of the Occupant Classification Sensor (OCS) system.
NOTE: In the event of air bag deployment, on-demand DTC B1193:00 (Crash Event Storage Full and Locked) will be stored in the Occupant Classification System Module (OCSM) memory, the DTC must be cleared before carrying out the System Reset.
1. The following DTCs will be retrieved on-demand from the OCSM and will be stored as Continuous Memory Diagnostic Trouble Codes (CMDTCs) after a successful System Reset:
- B00A0:54 (Missing calibration, retrieved when a new part is installed or System Reset has been unsuccessful)
- B00A0:67 (Signal incorrect after event, Zero Seat Weight Test unsuccessful)
- B00C0:81 (Invalid Serial Data Received "A", new sensor installed)
- B00C1:81 (Invalid Serial Data Received "B", new sensor installed)
- B00C2:81 (Invalid Serial Data Received "C", new sensor installed)
- B00C3:81 (Invalid Serial Data Received "D", new sensor installed)
- U3000:54 (Control Module Missing Calibration, new module installed)
2. If any other DTC is retrieved from the OCSM beside the DTCs listed above, refer to the DTC Charts for diagnostic direction. Diagnostic Trouble Code Tests and Associated Procedures
Retrieve all RCM/OCSM DTCs.
3. If DTC B2290 is retrieved on-demand in the RCM, check the OCSM for DTCs.
- If DTCs are present in the OCSM, Refer to the Occupant Classification System Module (OCSM) DTC Chart for diagnostic direction. Diagnostic Trouble Code Tests and Associated Procedures
- If no DTCs are present in the OCSM, CLEAR all DTCs from the RCM and proceed to Step 4.
4. Turn the ignition to the OFF position.
5. Prepare the passenger seat for a System Reset.
NOTICE: The following seat checks must be made before attempting to carry out an Occupant Classification Sensor (OCS) System Reset after the seat has been removed and re-installed for any reason:
- Make sure the seat is correctly installed in the vehicle.
- Make sure the passenger safety belt buckle is unbuckled.
- Make sure the seat has been tightened to specification as identified in the diagnostic/repair information.
- Make sure the seat track is correctly aligned (manual seat track).
- Make sure the OCS weight sensor bolt harness connections are correct for each sensor at their correct location. Refer to Wiring Diagram Set 46 for schematic and connector information. Diagrams By NumberRefer to the illustration for correct sensor location on the seat.
- Make sure the vehicles electrical system voltage is below 18 volts and above 11.5 volts before continuing with the OCS system reset.
Position the front passenger seat.
- Position the seat backrest in the upright (vertical) position.
- Position the seat in the middle position of seat track travel.
- Position the seat height to its middle position (power seat only).
6. Remove the hysteresis from the front passenger seat by firmly hitting the back of the seat head restraint 3 times.
7. Turn the ignition ON, wait 8 seconds and carry out the System Reset.
- If the system passed, carry out the OCS Zero Seat Weight Test. Refer to Occupant Classification Sensor (OCS) System Zero Seat Weight Test Component Tests and General Diagnostics.
- If the system did not pass, 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.
If System Reset was unsuccessful carry out the OCSM self-test.
- If DTC B00A0:54 is retrieved on-demand, refer to the DTC Charts for diagnostic direction. Diagnostic Trouble Code Tests and Associated Procedures
- If any other DTC are retrieved on-demand from the OCSM, Proceed to Step 9..
9. Inspect the following for causes of a unsuccessful System Reset.
- Make sure the passenger safety belt buckle is unbuckled.
- Make sure the front passenger seat is empty and there is nothing underneath the seat. Remove any items from the seat that were not factory installed and make sure that the seat is correctly installed in the vehicle.
- Make sure the seat wiring harnesses are routed and secured correctly and are not twisted, pinched, pulling down or pushing up on any seat component.
- Make sure the OCS weight sensor bolt protection brackets are correctly installed to the seat track and are not contacting the cushion side shield, wire harness or any other surrounding parts.
- Make sure the seat track and backrest frame are not bent, twisted or damaged.
- Move the seat and backrest to all seating positions. Make sure the seat track does not bind or have any resistance when moved to all seating positions. Make sure that there are no obstructions contacting any seat component when the seat is moved to all seating positions.
- Make sure the vehicles electrical system voltage is below 18 volts and above 11.5 volts.
- Make sure the seat is assembled correctly and all fasteners are tightened to specifications.
- If a concern was found, repair as necessary, Retest the System.
- If System Reset is unsuccessful, install new OCS weight sensor assemblies. Refer to Occupant Classification Sensor Service and Repair.
- If the system passed, go to Occupant Classification Sensor (OCS) System Zero Seat Weight Test Component Tests and General Diagnostics.