Operation CHARM: Car repair manuals for everyone.
Home >> Jeep Truck >> 2005 >> Liberty 2WD V6-3.7L VIN K >> Repair and Diagnosis >> Sensors and Switches >> Sensors and Switches - Restraints and Safety Systems >> Seat Sensor/Switch >> Service and Repair

Seat Sensor/Switch: Service and Repair

If any of the Occupant Classification System (OCS) components of the passenger side front seat cushion require replacement, they are serviced only as a factory-calibrated, assembled, and tamper-evident service replacement package. This package includes the assembled frame, springs, pad, seat weight bladder and pressure sensor, foam, wiring and a calibrated OCM. When installing this package, always replace all of the existing components with the new components as a unit. Do not attempt to separate or disconnect any of the new OCS components contained in the service replacement package from each other, and do not attempt to reuse any of the replaced components in this or any other vehicle.

Once any of the original factory-installed components except the OCM have been replaced with the service replacement package components, the OCM can only be serviced by replacing the entire passenger side front seat cushion unit with another complete service replacement package. Any time any one of these components is removed or replaced for any reason, the OCM must be re-calibrated using a diagnostic scan tool, the Occupant Classification Seat Weight special tool, and the Occupant Classification System Verification Test. Refer to the appropriate diagnostic procedures.

WARNING:
- TO AVOID PERSONAL INJURY OR DEATH, ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, AIRBAG, OCCUPANT CLASSIFICATION SYSTEM, SEAT BELT TENSIONER, IMPACT SENSOR, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT.
- TO AVOID PERSONAL INJURY OR DEATH ON VEHICLES EQUIPPED WITH THE OCCUPANT CLASSIFICATION SYSTEM (OCS), ONLY THE OCCUPANT CLASSIFICATION MODULE (OCM) AND THE SEAT CUSHION TRIM MAY BE SERVICED SEPARATELY. ALL OTHER COMPONENTS OF THE PASSENGER SIDE FRONT SEAT CUSHION ASSEMBLY MUST BE SERVICED ONLY AS A COMPLETE FACTORY-CALIBRATED, ASSEMBLED AND TAMPER-EVIDENT SERVICE REPLACEMENT PACKAGE. THIS PACKAGE INCLUDES THE FRAME, SPRINGS, PAD, BLADDER AND PRESSURE SENSOR, FOAM, WIRING AND A CALIBRATED OCM. WHEN INSTALLING THIS PACKAGE ALWAYS REPLACE ALL OF THE EXISTING COMPONENTS WITH THE NEW COMPONENTS AS A UNIT. DO NOT ATTEMPT TO SEPARATE OR DISCONNECT ANY OF THE NEW OCS COMPONENTS IN THE SERVICE REPLACEMENT PACKAGE FROM EACH OTHER, AND DO NOT ATTEMPT TO REUSE ANY OF THE REPLACED COMPONENTS IN THIS OR ANY OTHER VEHICLE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN FAILURE OF THE PASSENGER AIRBAG TO DEPLOY WHEN REQUIRED, OR IN PASSENGER AIRBAG DEPLOYMENT WHEN NOT REQUIRED.
- TO AVOID PERSONAL INJURY OR DEATH ON VEHICLES EQUIPPED WITH THE OCCUPANT CLASSIFICATION SYSTEM (OCS), DO NOT MODIFY THE FRONT PASSENGER SEAT ASSEMBLY OR CENTER FLOOR CONSOLE IN ANY WAY. DO NOT USE ANY PRIOR YEAR, SUBSEQUENT YEAR, SECONDARY OR AFTERMARKET SEAT TRIM COVERS. AT NO TIME SHOULD ANY SUPPLEMENTAL RESTRAINT SYSTEM (SRS) OR OCS COMPONENT BE MODIFIED OR REPLACED WITH ANY PART EXCEPT THOSE WHICH ARE SPECIFIED FOR THE PARTICULAR VEHICLE APPLICATION IN THE DAIMLERCHRYSLER MOPAR PARTS CATALOG. FAILURE TO OBSERVE THESE PRECAUTIONS COULD CAUSE AN OCS MISCALIBRATION CONDITION, WHICH MAY RESULT IN THE PASSENGER AIRBAG FAILING TO DEPLOY WHEN REQUIRED OR DEPLOYING WHEN NOT REQUIRED.

CAUTION: On vehicles equipped with the Occupant Classification System (OCS), never replace both the Airbag Control Module (ACM) and the Occupant Classification Module (OCM) at the same time. If both require replacement, replace one. Then perform the supplemental restraint verification test before replacing the other. Both the ACM and the OCM store OCS calibration data, which they transfer to one another when one of them is replaced. If both are replaced at the same time, an irreversible fault will be set in both modules.

REMOVAL
1. Disconnect and isolate the battery negative cable. Wait two minutes for the system capacitor to discharge before further service.
2. Remove the passenger side front seat from the vehicle.
3. Remove the seat cushion assembly from the passenger side front seat.
4. Remove the trim cover from the passenger side front seat cushion.
5. Discard the entire passenger side front seat cushion frame, springs, pad, bladder and pressure sensor, foam, wiring and Occupant Classification Module (OCM) and replace with the entire contents of the factory-calibrated, assembled and tamper-evident service replacement package.

INSTALLATION
1. Discard the entire passenger side front seat cushion frame, springs, pad, bladder and pressure sensor, foam, wiring and Occupant Classification Module (OCM) and replace with the entire contents of the factory-calibrated, assembled and tamper-evident service replacement package.
2. Reinstall the trim cover onto the passenger side front seat cushion.
3. Reinstall the seat cushion assembly onto the passenger side front seat.
4. Reinstall the passenger side front seat into the vehicle.
5. Do not reconnect the battery negative cable at this time. The supplemental restraint system verification test procedure should be performed following service of any supplemental restraint system component.
6. Following successful completion of the supplemental restraint system verification test procedure, perform the Occupant Classification System Verification Test using a diagnostic scan tool and the Occupant Classification Seat Weight special tool. Refer to the appropriate diagnostic procedures.
pro multis · About Operation CHARM