Occupant Classification Sensor - Original Equipment

Occupant Classification Sensor - Original Equipment





















Removal

NOTE: Occupant Classification Sensor (OCS) system components, seat cushion foam pad, bladder with pressure sensor and OCSM, are calibrated to each other and are serviced as an assembly. If a new OCS system, OCS system component or seat cushion foam pad are needed, a new OCS system service kit (seat cushion foam pad, bladder with pressure sensor and OCSM) must be installed as an assembly.

NOTE:To identify between a production OCS system and a service OCS system (OCS service kit), inspect the electrical connector. A service OCS system (OCS service kit) has the electrical connector glued to the OCSM. It cannot and should not be disconnected or altered.

NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition is ON.

NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

1. Remove the passenger seat. For additional information, refer to Seating Seat - Front.

2. Disconnect the electrical connectors and detach the wiring clips.

1. Disconnect the Occupant Classification System Module (OCSM) electrical connector.

2. Disconnect the pressure sensor electrical connector.

3. Release the 2 wiring clips on the wiring harness from the seat cushion pan.

4. If equipped with heated seats, disconnect the heated seat relay electrical connector, release the wiring clip on the wiring harness from the seat cushion pan, and disconnect the 2 cushion heater mat electrical connectors.





3. Remove the 4 seat cushion bolts retaining the seat cushion to the seat track.

4. NOTICE: While positioning the seat cushion pan and Occupant Classification Sensor (OCS) assembly, be careful not to damage any of the components. Failure to follow these instructions may result in incorrect operation of the OCS system and may cause system failure.

Remove the seat cushion and pan assembly.

- To aid in removal, recline the seat.

5. NOTICE: Use care when separating the seat cushion trim cover from the hook-and-loop strip, or the hook-and-loop strip can be torn from the seat cushion foam pad.

Detach the seat cushion trim cover J-clips from the seat cushion pan and remove the seat cushion trim cover.





6. Remove the seat cushion foam pad.

7. Bend the retaining tab away from the pressure sensor, then slide the pressure sensor off the bracket.





8. NOTICE: Care must be taken to prevent damage to the seat cushion pan when removing the rivets.

Remove the 2 rivets and the OCSM.

9. Remove the 2 pin-type retainers from the OCS bladder and seat cushion pan.

10. Feed the OCS hose and pressure sensor through the seat cushion pan opening and remove as an assembly with the bladder.

Installation

NOTICE: To prevent system failure, it is necessary to carry out the Occupant Classification Sensor (OCS) system reset when a front passenger seat cushion is disassembled, a new trim cover installed or an OCS system service kit is installed. A scan tool is used to carry out the OCS system reset command.

NOTICE: Do not install a new cushion heater mat on a front passenger seat cushion, it is not serviceable separately. If a new cushion heater mat is needed on the front passenger seat, an Occupant Classification Sensor (OCS) system service kit equipped with a heater mat must be installed. Failure to follow this instruction may result in incorrect operation of the OCS system.

1. Bend the retaining tab back on the pressure sensor component bracket.





2. NOTICE: Inspect the Occupant Classification Sensor (OCS) bladder, seat cushion pan and support assembly for any foreign objects before installing the OCS to the seat cushion pan. If any foreign objects are found, remove them. Failure to follow these instructions may result in incorrect operation of the OCS system and may cause system failure.

NOTICE: Route the seat Occupant Classification Sensor (OCS) components through the correct seat cushion support opening. Failure to follow these instructions may result in component damage and/or system failure.

NOTICE: While positioning the seat cushion pan and Occupant Classification Sensor (OCS) assembly, be careful not to damage any of the components.

Feed the OCS components (pressure sensor and hose) through the seat cushion pan opening.





3. Align the OCS bladder to the seat cushion pan.

4. Install the 2 pin-type retainers to the OCS bladder and seat cushion pan.

5. NOTE: Make sure the pressure sensor hose is not kinked during installation.

Install the pressure sensor onto the seat cushion pan bracket, making sure the retaining tab is completely engaged.

- When installed correctly, an audible click will be heard and the pressure sensor will not be able to be removed from its bracket without disengaging the retaining tab.

6. Slide the OCSM into the seat cushion pan bracket and install the rivets.
- The OCSM must be correctly positioned and securely fastened in place. Failure to do so can set a DTC in the RCM.

7. Position the foam pad to the seat cushion pan.

8. NOTICE: Inspect the seat cushion pad and seat cushion trim cover for any foreign material, before installing the seat cushion trim cover to the seat cushion pad. If any foreign material is found, remove it. Failure to follow these instructions may result in incorrect operation of the Occupant Classification Sensor (OCS) system and may cause system failure.

Install the seat cushion trim cover to the seat cushion foam pad and attach the J-clips.





9. NOTICE: Inspect the seat cushion pad and seat cushion trim cover for any foreign objects, before installing the seat cushion trim cover to the seat cushion pad. If any foreign objects are found, remove them. Failure to follow these instructions may result in incorrect operation of the Occupant Classification Sensor (OCS) system and may cause system failure.

Position the seat cushion and pan assembly to the seat track.

- To aid in installation, recline the seat backrest.

10. Install the 4 seat track-to-cushion frame bolts.
- Tighten to 25 Nm (18 lb-ft).

11. Connect the electrical connectors and wiring clips.

1. Connect the OCSM electrical connector.

2. Connect the pressure sensor electrical connector.

3. Install the 2 wiring clips on the wiring harness to the seat cushion pan.

4. If equipped with heated seats, connect the heated seat relay electrical connector, install the wiring clip on the wiring harness to the seat cushion pan, and connect the 2 cushion heater mat electrical connectors.





12. Install the front passenger seat and repower the SRS. For additional information, refer to Seating Seat - Front. Do not prove out the SRS within the seat installation procedure. Proceed to the next step after seat installation and repowering the SRS to carry out the system reset procedure.

13. WARNING: 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 carrying out the System Reset. Failure to follow these instructions may result in incorrect operation of the occupant classification sensor (OCS) system and increases the risk of serious personal injury or death in a crash.

NOTICE: To prevent system failure, the following precautions must be taken before carrying out the Occupant Classification Sensor (OCS) system reset:
- Make sure the voltage to the Occupant Classification System Module (OCSM) is above 8 volts and less than 18 volts.
- Make sure the OCS system is not at a temperature below 6°C (42°F) or above 36°C (97°F) when initiating the OCS system reset process. If the vehicle has been exposed to extreme cold or hot temperatures, the vehicle must be exposed and kept at a temperature within the limits, 6°C to 36°C (42°F to 97°F) for a minimum of 30 minutes.
- Make sure nothing is present on the passenger seat before carrying out the OCS system reset and nothing is placed on the seat during the process.
- Make sure a minimum 8-second time period has passed after cycling the ignition switch ON before the carrying out the OCS system reset process.


Carry out the Occupant Classification Sensor (OCS) system reset.

14. If the first system reset attempt was unsuccessful, carry out a thorough visual inspection of the following and repair any concerns found.
- OCS system connector and wiring for damage

- Pressure sensor hose for kinks and/or damage

- Seat-related wiring harness and body wiring harness terminals and connectors for damage

15. NOTE: The ignition switch must be cycled after the OCS system reset.

Carry out a second OCS system reset. If the second attempt is unsuccessful, install a new OCS system service kit. For additional information, refer to Occupant Classification Sensor - Service Kit Occupant Classification Sensor - Service Kit.

16. Prove out the SRS as follows:
Turn the ignition from ON to OFF. Wait 10 seconds, then turn the ignition back ON and monitor the air bag warning indicator with the air bag modules installed. The air bag warning indicator will light continuously for approximately 6 seconds and then turn off. If an air bag SRS fault is present, the air bag warning indicator will:
- fail to light.
- remain lit continuously.
- flash at a 5 Hz rate (RCM not configured).

The air bag warning indicator might not light until approximately 30 seconds after the ignition has been turned from the OFF to the ON position. This is the time required for the RCM to complete the testing of the SRS. If the air bag indicator is inoperative and a SRS fault exists, a chime will sound in a pattern of 5 sets of 5 beeps. If this occurs, the air bag warning indicator and any SRS fault discovered must be diagnosed and repaired.

Clear all RCM and OCSM DTCs using a scan tool.