2003 Lexus SC 430 Owners Manual - Page 131

COMFORT ADJUSTMENT Front seat belt pretensioners 16sa33a 16sa17c This indicator comes on when the ignition switch is turned to the "ON" position. It goes off after about 6 seconds. This means the front seat belt pretensioners are operating properly. This warning light system monitors the airbag sensor assembly, front airbag sensors, side airbag sensors, occupant detection sensor, seat belt buckle switch, front seat belt pretensioner assemblies, inflators, warning light, interconnecting wiring and power sources. (For details, see "Service reminder indicators and warning buzzers" on page 38.) The driver and front passenger's seat belt pretensioners are designed to be activated in response to a severe frontal impact. When the airbag sensor detects the shock of a severe frontal impact, the front seat belts are quickly drawn back by the retractor so that the belts snugly restrain the front seat occupants. The front passenger seat belt pretensioner will not activate if there is no passenger sitting in the front passenger seat. However, the front passenger seat belt pretensioner may activate if luggage is put in the seat, or the seat belt is buckled up regardless of the presence of the occupant in the seat. The seat belt pretensioners and SRS airbags may not operate together in case of collisions at certain speeds and angles. 110