Sensor, Occupant Detection: 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, 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.
When handling a new Occupant Detection Sensor (ODS), it should never be bent, creased, torn, cut or abraded. The ODS should not be handled with or come into contact with hard or sharp-edged tools or objects. Do not allow the ODS to drop more than 2 meters (6.5 feet). Prior to installation, do not sit on, stand on or place boxes, tools or any other foreign object on the ODS. If the ODS adhesive patches become inadvertently adhered to any seat materials or foreign objects prior to proper positioning on the seat cushion, the ODS must be scrapped and replaced with a new unit. Do not modify the seat foam or trim materials of a seat that contains an ODS. Failure to observe these cautions may result in an inoperative ODS, or an ODS that provides inaccurate inputs to the Occupant Restraint Controller (ORC).
The adhesive used to secure the ODS to the seat is heat activated and requires that both the adhesive and the material it is applied to be ideally between 21° and 38° C (between 70° and 100° F). Application of the ODS to surfaces below 10° C (50° F) is not recommended as the adhesive becomes too firm to readily adhere. Do not touch or allow the adhesive patches to contact any foreign materials with the release paper removed. Do not attempt to add adhesive materials to the ODS.
The Occupant Detection Sensor (ODS) is used only in the passenger side front seat of vehicles manufactured for export markets. Vehicles manufactured for domestic markets use the Occupant Classification System (OCS) instead of the ODS on the passenger side front seat.
There are unique and non-interchangeable Occupant Detection Sensors (ODS) used on this vehicle, depending on the optional seat trim. Do not attempt to install an ODS that is incorrect for the vehicle.
- Carefully inspect the ODS (2) to be certain that it is in good condition.
- Insert the ODS pigtail wire harness and the tail of the ODS through the clearance hole (5) near the center (with dual longitudinal crimp channel seat foam) or offset toward the left (with single longitudinal crimp channel seat foam) at the back of the seat cushion foam.
- Carefully position and center the sensor cells of one branch of the ODS sensor mat onto the seat cushion foam (1) within the locator indentations molded into the foam.
- Remove the release paper from the adhesive patch (3) on the cushion side of that branch of the ODS mat.NOTE:
The release paper should not be removed from the adhesive patches of a new ODS mat until just prior to application to the seat cushion foam.
- Apply hand pressure (0.8 bar or 12 psi) over the adhesive patch of that ODS branch for at least four seconds to activate and adhere the adhesive to the seat cushion foam.
- Push the cross piece between the two sensor cell branches down into the trough or troughs (4) of the seat cushion foam.
- Carefully position and center the sensor cells of the second branch of the ODS sensor mat onto the seat cushion foam within the locator indentations molded into the foam.
- Remove the release paper from the adhesive patch on the cushion side of the second branch of the ODS mat.
- Apply hand pressure (0.8 bar or 12 psi) over the adhesive patch of that ODS branch for at least four seconds to activate and adhere the adhesive to the seat cushion foam.
- Reach under the seat cushion pan to access and connect the ODS pigtail wire connector to the seat wire harness. Be certain that the ODS pigtail harness is not pinched between the seat cushion foam and the seat cushion springs.
- If equipped, install the heater mat onto the seat cushion foam. Refer to PAD, HEATER, INSTALLATION .
- Install the trim onto the front seat cushion foam and pan. Refer to COVER, SEAT CUSHION, INSTALLATION .
- Install the passenger side front seat into the vehicle. Refer to SEAT, INSTALLATION .
- Connect the negative battery cable. If equipped with an Intelligent Battery Sensor (IBS), connect the IBS connector.