Occupant Classification System (OCS) Sensor - Vehicles Built Up to: 25-June-2012
Occupant Classification System (OCS) Sensor - Vehicles Built Up To: 25-June-2012
Removal
WARNING: Before beginning any service procedure. Failure to follow this instruction may result in serious personal injury.
NOTE: Inspect the upper LH corner of the driver lower knee bolster for the word "AIRBAG". If "AIRBAG" is present in the upper LH corner, refer to the procedure that applies to vehicles with a later build date.
1. Refer to: Health and Safety Precautions. Health and Safety Precautions
2.
1. Recliner handle (Service Part Number 5861692)
2. Screw (Service Part Number 56920)
3. Cushion side shield (part of 5862187)
4. Seat
5. Cushion cover (Service Part Number 62900)
6. Cushion heater mat (part of 632A22) (if equipped)
7. OCS (Service Part Number 632A22)
8. OCS Sensor (Part of 632A22)
9. Cushion heater mat electrical connector (part of 632A22) (if equipped)
10. Recliner cover (Service Part Number 5862187)
NOTICE:
- To prevent system failure, carry out the OCS reset when a front passenger seat cushion is disassembled, a new trim cover is installed or an OCS service kit is installed. Use a scan tool to carry out the OCS reset command.
- The cushion heater mat on a front outboard passenger seat is not serviced separately. If a new cushion heater mat is needed on the front passenger seat, install an OCS service kit equipped with a heater mat. Failure to follow this instruction may result in incorrect operation of the OCS.
NOTE: OCS components (seat cushion foam pad, bladder with OCSM) are calibrated to each other and are serviced as an assembly. The OCS components are not to be installed separately. If a new OCS, OCS component or seat cushion foam pad are needed, a new OCS service kit (seat cushion foam pad, bladder with OCSM) must be installed as an assembly.
3. Remove the passenger seat.
Refer to: Front Seat.
4. Remove the recliner cover.
5.
1. Detach the safety belt buckle wire from the recliner cover.
2. Remove the screw at the rear.
3. Pull out on the recliner cover at the rear to disengage the locator pin.
4. Pull down and out at the lower front of the recliner cover to disengage the retainer.
5. Lift and remove the recliner cover.
6. Remove the screw and recliner handle.
7. Remove the cushion side shield.
8.
1. Remove the screw at the rear.
2. Pull out to the side on the rear of the cushion side shield to disengage the locator pin.
3. Slide the cushion side shield forward to disengage the brackets and remove the cushion side shield.
9. If equipped, disconnect the heated seat electrical connector and detach any wire harness retainers.
10. NOTICE: Using excessive force when bending the bracket can damage the OCS sensor housing.
NOTE: Typical early build OCS sensor and bracket shown, others similar.
For early build, separate the OCS sensor from the bracket in the following sequence.
11.
1. Disconnect the OCS sensor electrical connector.
2. Slide an appropriate tool in the slot between the OCS sensor and bracket.
3. Carefully lift the tool end to bend the bracket tab and slide the OCS sensor off the bracket.
12. For late build
13. Detach all the cushion cover retainers attached to the seat track and cushion frame.
14. If equipped with an Original Equipment (OE) OCS, remove the cushion foam pad and cushion cover.
15. NOTE: Typical seat shown, others similar.
Detach the front pin-type retainers, lift the bladder and feed the OCS hose and sensor out from between the seat cushion support wires.
16. Remove the cushion cover from the cushion foam pad.
Installation
1. NOTE: Typical early build bracket tab shown.
For early build, bend the bracket tab away from the seat.
2. NOTICE: Inspect the OCS bladder, seat cushion pan and support assembly for any foreign objects before installing the OCS to the seat cushion pan. Remove any foreign objects. Failure to follow these instructions may result in incorrect operation of the OCS and may cause system failure.
Inspect the OCS bladder, seat cushion pan and support assembly for any foreign objects before installing the OCS to the seat cushion pan. Remove any foreign objects found.
3. NOTICE: Do not trap the pressure sensor hose incorrectly over the seat's suspension or spring. Route the hose so that it lays in a natural bend, and is not twisted due to being forced into an unnatural position. Failure to follow these instructions may result in component damage and/or system failure.
Route the OCS sensor and hose through the correct opening of the seat cushion suspension wires.
4. Position the OCS and install the front pin-type retainers.
5. For early build, slide the OCS sensor onto the bracket and connect the electrical connector.
6. Make sure the OCS sensor is securely installed.
7. For late build
8. For an Original Equipment (OE) OCS, position the cushion foam pad on the seat track.
9. If equipped, connect the heated seat electrical connector and attach any wire harness retainers.
10. Install the cushion cover onto the cushion foam pad.
11. Attach all the cushion cover retainers to the seat track and cushion frame.
12. Install the cushion side shield and screw.
13. Install the recliner handle and screw.
14. Install the recliner cover, the screw and attach the safety belt buckle wire.
15. Install the passenger seat. Do not prove out the SRS at this time.
Refer to: Front Seat.
16. WARNING:
- Occupant Classification System (OCS) parts are calibrated as an assembly and must only be replaced in the configuration they are sold. Never separate parts of an assembly. Failure to follow this instruction may result in incorrect operation of the OCS and increases the risk of serious personal injury or death in a crash.
- Make sure the front passenger seat repair is complete, the seat and all attached components (head restraint, seat side shield, etc.) are correctly assembled, and the seat is correctly installed to the vehicle before using System Reset to rezero the seat weight. 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.
NOTICE: To prevent system failure, take the following precautions before carrying out the OCS reset.
- Make sure the voltage to the OCSM is greater than 8 volts and less than 18 volts.
- Make sure the OCS is not below 6° C (42.8° F) or above 36° C (96.7° F) when initiating the OCS reset process. If the vehicle has been exposed to extreme cold or hot temperatures, the vehicle must be exposed and kept at a temperature between 6° C (42.8° F) to 36° C (96.7° F) for a minimum of 30 minutes.
- Make sure nothing is present on the passenger seat before and during the OCS reset process.
- Prior to carrying out the OCS reset, make sure a minimum of 8 seconds has elapsed after cycling the ignition switch on.
Using a diagnostic scan tool, carry out the OCS reset. Cycle the ignition switch after the OCS reset.
17. If the first system reset attempt was successful, proceed to prove out the SRS.
18. If the first system reset attempt was not successful, carry out a thorough visual inspection of the OCS connector and wiring for damage, pressure sensor hose for kinks and or damage, and seat-related wiring harness and body wiring harness terminals and connectors for damage. Repair any concerns found and proceed to the next step.
19. Carry out a second OCS reset. Cycle the ignition switch after the OCS reset. If the second attempt is unsuccessful, install a new OCS service kit.
Refer to: Occupant Classification System (OCS) Sensor - Vehicles Built From: 11-June-2012. Occupant Classification System (OCS) Sensor - Vehicles Built From: 11-June-2012
20. Prove out the SRS by turning the ignition from ON to OFF. Wait 10 seconds, then turn the ignition back to ON and monitor the air bag warning indicator with the air bags installed. The air bag warning indicator illuminates continuously for approximately 6 seconds and then turns off. If a SRS fault is present, the air bag warning indicator will fail to light, remain lit continuously, or flash.
21. The flashing might not occur until approximately 30 seconds after the ignition has been turned from OFF to ON. This is the time required for the RCM to complete the testing of the SRS. If the air bag warning indicator is inoperative and a SRS fault exists, a chime sounds in a pattern of 5 sets of 5 beeps. If this occurs, diagnose and repair the air bag warning indicator and any SRS faults.
22. Clear all continuous Diagnostic Trouble Codes (DTCs) from the RCM and OCSM using a diagnostic scan tool.