Seat Belt Warning Occupant Detection Sensor
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Passenger seat only.
Check that continuity exists between terminals No. 1 and 2 when pressing the sensing part. See Fig 1. If operation is not as specified, replace the sensor.