Module, Occupant Classification (OCM): Installation
To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, Occupant Classification System (OCS), 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 SRS. Failure to follow these instructions may result in accidental airbag deployment.
The OCS is used only in the passenger side front seat of vehicles manufactured for domestic markets. Vehicles manufactured for export markets use the Occupant Detection Sensor (ODS) instead of the OCS on the passenger side front seat.
All of the components of the OCS including the Occupant Classification Module (OCM), the seat weight sensor, the jute-like seat weight sensor pad, the passenger seat cushion foam, the electronic pressure sensor and the OCS pressure hose are serviced only as a factory-calibrated and assembled unit. Any time any one of these components (1 and 2) requires replacement for any reason, discard all of the removed OCS components including the OCM with integral and internal electronic pressure sensor, the pressure hose, the seat weight sensor, the jute-like seat weight sensor pad and the seat cushion foam. They MUST BE REPLACED WITH THE ENTIRE CONTENTS OF THE FACTORY-CALIBRATED OCS SERVICE REPLACEMENT PACKAGE and then re-zeroed using a diagnostic scan tool. Refer to the appropriate diagnostic information.
If ONLY the seat trim requires replacing and no other components are compromised. Replace the trim and follow the OCS re-zeroing process. Refer to the appropriate diagnostic information.
- Position the seat weight sensor, the jute-like seat weight sensor pad, the OCS pressure hose and the OCM with integral electronic pressure sensor (2) to the top of the front seat pan/suspension mat as a unit. Lift the back of the seat weight sensor and pad far enough to access and insert the OCM and pressure hose between the seat structure springs to the underside of the seat pan/suspension mat. Be certain the pressure hose routing is the same as previously installed and the hose is not pinched or kinked in any areas.
- Install the two push-in plastic fasteners that secure the seat weight sensor and jute-like pad to the seat cushion pan.
- Position the foam (1) to the seat pan/suspension mat.
- Install the seat cover to the passenger front seat foam. For manual seat Refer to INSTALLATION , or for power seat refer to INSTALLATION .
- Collect ALL
of the OCS components, including the seat cushion foam assembly replaced during this repair procedure. Insure ALL
parts are the original equipment parts. Return ALL
removed parts to the Mopar Quality Center / QEC for root cause evaluation. If the original equipment removed parts have not ALL been replaced, return to Step 1 and complete all steps of the repair process.
- From the underside of the seat cushion, snap the OCM (4) to the blade (2) of the mounting bracket beneath the inboard front corner of the seat pan/suspension mat. Route the pressure hose away from sharp or moving objects, keeping the same routing path as previously installed and insuring the hose is not kinked.
- Connect the seat wire harness connector (1) to the OCM beneath the inboard front corner of the seat cushion.
- Install the passenger front seat into the vehicle. Refer to INSTALLATION .
- Do not connect the negative battery cable at this time. The Supplemental Restraint System (SRS) Verification Test procedure should be performed following service of any SRS component. Refer to SUPPLEMENTAL RESTRAINT SYSTEM VERIFICATION TEST .
- If this Electronic Control Unit (ECU) is being replaced with a new unit, a diagnostic scan tool MUST be used to determine if alignment of the PROXI configuration data into the new ECU is needed. If PROXI alignment is needed, follow the routine outlined in the diagnostic scan tool for PROXI Configuration Alignment under the Body Control Module (BCM) Miscellaneous Functions menu.NOTE:
The re-zero function will not complete if any OCM faults are active. Ensure that all faults are cleared or are in stored status.
- Following successful completion of the SRS Verification Test procedure and PROXI configuration, perform the OCM System Verification Test procedure found in the diagnostic scan tool under Miscellaneous Functions. Refer to the appropriate diagnostic procedures.