Programming and Relearning

OCCUPANT CLASSIFICATION SENSOR (OCS) SYSTEM RESET

Special Tool(s):

Special Tool(s)

WARNING:
- Make sure the occupant classification sensor (OCS) system is at room temperature, defined as 51°C to 48°C (41°F to 118°F). If the vehicle has been exposed to temperatures outside this range, expose the vehicle to room temperature for 45 minutes prior to carrying out the System Reset. The room temperature must remain stable. Failure to follow these instructions may result in the incorrect operation of the OCS system and increase the risk of serious personal injury or death in a collision.
- Make sure the front passenger seat repair is complete, the seat is completely assembled, all components (head restraint, seat side shield, etc.) are correctly installed and the front passenger seat is correctly installed to the vehicle before carrying out the System Reset. Failure to follow these instructions may result in the incorrect operation of the occupant classification sensor (OCS) system and increase the risk of serious personal injury or death in a collision.

CAUTION: Make sure the occupant classification sensor (OCS) system weight sensor bolt protection brackets are correctly installed to the seat track and that it does not contact the cushion side shield, wire harness or any other surrounding parts. Failure to follow this instruction may result in the incorrect operation of the OCS system.

NOTE:
- The supplemental restraint system (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
- The System Reset active command calibrates the system components and resets the zero point of the occupant classification sensor (OCS) system.
- If the occupant classification sensor (OCS) module has any on-demand diagnostic trouble codes (DTCs) except B1013 or C1941 present, the fault condition must be repaired and the DTC(s) cleared before carrying out the System Reset on the front passenger seat. Failure to follow this instruction will result in an unsuccessful System Reset and the incorrect operation of the OCS system.
- The System Reset active command should only be carried out as directed after installing a new OCS component.

1. WARNING: The following precautions must be taken before carrying out the System Reset on the front passenger seat.
- Make sure the vehicle is on level ground.
- Do not expose the front passenger seat to sudden temperature changes.
- Make sure the front passenger seat is empty.
- Make sure the front passenger seat is dry.
- Make sure the front passenger seat head restraint is 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, etc.) 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 occupant classification sensor (OCS) system.

Failure to follow these instructions may increase the risk of personal injury or death in a collision.

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.

2. Position the front passenger seat.
- Position the seat backrest in the upright position.
- Position the seat in the middle position of seat track travel.
- Position the seat height to its middle position (power seat only).

3. WARNING: Hysteresis (binding or resistance between components) must be removed from the front passenger seat as directed in the procedure prior to carrying out the System Reset. Failure to follow these instructions may result in the incorrect operation of the OCS system and increase the risk of serious personal injury or death in a collision.

Remove hysteresis from the front passenger seat by firmly hitting the back of the seat head restraint 3 times.

4. WARNING: Make sure nothing is placed on the front passenger seat during System Reset. Do not press, touch or lay anything on the front passenger seat until System Reset has been completed. Failure to follow these instructions may result in the incorrect operation of the OCS system and increase the risk of serious personal injury or death in a collision.

NOTE: Make sure a minimum 8-second time period has passed after cycling the ignition switch ON before carrying out the System Reset active command.

Turn the ignition switch ON, wait 8 seconds and carry out the System Reset using the scan tool.
- If the system passed, GO TO Occupant Classification Sensor (OCS) System Zero Seat Weight Test. Component Tests and General Diagnostics
- If the system did not pass, proceed to Step 5.

5. Inspect the following for causes of a unsuccessful System Reset.
- 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. Refer to Seat Cushion Wire Harness Routing - Front Passenger Cushion in the General Procedures of Seats.
- 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 seat is assembled correctly and all fasteners are tightened to specifications.
- If a concern was found, repair as necessary, proceed to Step 1.
- If no concern was found, install a new passenger seat track assembly with OCS weight sensor bolts. Refer to Seats.