Take care to install the occupant detection sensor, as shaping or striking the front passenger seat with your hand can make it out of calibration and may cause damage. On no account put weight on the passenger side seat while it is taken off its mounts. If you damage a sensor or drop it, replace it with a new unit and if the seat has either been dropped or loaded with no occupant detection sensors present, change all those sensors to new ones so the supplemental restraints will function properly. Whenever you remove or loosen the passenger side front seat assembly, use a diagnostic scan tool and the special Occupant Classification Seat Weight tool to verify the Occupant Classification System after it is reinstalled. While placing the nut on the fastener stud, attach the strain gauge alignment tool 9689 to avoid the sensor from rotating; use hands while working on any of the sensor fasteners to keep from damaging them. Attachment of the occupant detection sensor using nuts and securing the adjuster to the track by tightening them to 28 Nm (21 ft. lb.). When putting the seat track on the riser, add the four center nuts but not the main nut until the strain gauge is lined up using the alignment tool. Hook the fork into the occupant detection sensor, make sure the support yoke sits against the occupant detection sensor cage and tighten the nut for all four sensors to 45 Nm, before connecting the electrical wire and putting back the passenger front seat. Before testing the PCM system, do not link the negative battery wire to the system. Commit to performing the Occupant Classification System Verification Test with a diagnostic scan tool and the Occupant Classification Seat Weight tool 9077 after the proper PCM verification test is accomplished.