Lexus 2006 lx 470 Manual page 180

OCCUPANT RESTRAINT SYSTEMS
The front passenger occupant classification indicator
light indicates the actuation of the front passenger airbag,
side airbag on the front passenger seat and front
passenger's seat belt pretensioner.
The indicator light will indicate "OFF" when the ignition switch
is in the "ON" position with the condition 2 in the table shown
below.
If the front passenger occupant classification system
determines that a person of adult size sits in the front
passenger seat but the "OFF" indicator is illuminated, one of
the following is likely to have occurred:
D A rear passenger lifts the front passenger seat cushion with
their legs.
D Objects are placed under the front passenger seat.
D The front passenger seatback is in contact with the rear
seat.
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To ensure the system correctly detects an adult sitting in the
front passenger seat, make sure the above do not occur.
Make sure that the "ON" indicator is illuminated when an adult
is seated in the front passenger seat. If the "OFF" indicator is
illuminated, ask the passenger to sit up straight, well back in
the seat, and with the seat belt worn correctly. If the "OFF"
indicator still remains illuminated, either ask the passenger to
move to the rear seat, or if that is not possible, move the front
passenger seat fully rearward.
The front passenger occupant classification indicator
light will indicate "ON" and "OFF" when the ignition key
is turned to the "ON" position. After about 4 seconds, it
will go off. After about 2 seconds, the front passenger
occupant classification system operates and judges
whether to indicate "ON" or "OFF".