Removal And Installation: Removal
If this Electronic Control Unit (ECU) is being replaced with a new unit, a diagnostic scan tool MUST be used to align the PROXI configuration data into the new ECU. Follow the routine outlined in the diagnostic scan tool for PROXI Configuration Alignment under Body Control Module (BCM) Miscellaneous Functions menu.
To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbags, airbag curtains, knee blocker, seat belt tensioner, impact sensor or instrument panel component diagnosis or service. Disconnect the Intelligent Battery Sensor (IBS)/negative battery cable assembly from the negative battery post, 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 take the proper precautions could result in accidental airbag deployment.
The Occupant Classification System (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 plastic insulator seat weight sensor pad, the passenger seat cushion foam, the electronic pressure sensor, the OCS pressure hose, and the heat mat and vent bag (if equipped), are serviced only as a factory-calibrated and assembled unit. Any time any one of these components requires replacement for any reason, the entire calibrated OCS must be replaced and re-zeroed. 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.
- Disconnect and isolate the negative battery cable. If equipped with an Intelligent Battery Sensor (IBS), disconnect the IBS connector first before disconnecting the negative battery cable. Wait two minutes for the system capacitor to discharge before continuing service.
- Remove the passenger front seat from the vehicle. Refer to SEAT, FRONT, REMOVAL AND INSTALLATION .
- Disconnect the seat wire harness connector (3) from the OCM (1) beneath the outboard front corner of the seat cushion pan.
- Using a small flat-bladed screwdriver or a small pick tool, carefully pry the latch tab integral to the OCM electrical receptacle to release it from the blade (2) of the mounting bracket beneath the outboard front corner of the seat cushion.
- Remove the cover and foam seat cushion from the passenger front seat. Refer to COVER, SEAT CUSHION, FRONT, REMOVAL AND INSTALLATION
.NOTE:
If equipped with heated seats, vented seats or both, remove the heat mat and vent bag with the seat cushion.
- Remove the two push-in plastic fasteners (3) that secure the seat weight sensor and the plastic insulator seat weight sensor pad (1) to the seat cushion pan (2).
- Remove the seat weight sensor, the pad, the pressure hose and the OCM with integral electronic pressure sensor from above the front seat cushion as a unit.
- If any of the OCS components requires replacement, discard the entire OCS unit. Replace it with the entire contents of the factory-calibrated service replacement package, which includes an OCM with integral and internal electronic pressure sensor, a pressure hose, the seat weight sensor, the plastic insulator seat weight sensor pad, the heat mat (if equipped), the vent bag (if equipped) and the seat cushion foam. NOTE:
If the vehicle is equipped with heated seats, vented seats or both, the proper OCM service kit is boxed together but not attached.