2003 Lexus LX 470 Owners Manual - Page 151

COMFORT ADJUSTMENT 16x502a 16X254a This indicator comes on when the ignition switch is turned to the "ON" position. It goes off after about 6 seconds. This means the seat belt pretensioners are operating properly. This warning light system monitors the airbag sensor assembly, front airbag sensors, side and curtain shield airbag sensor assemblies, curtain shield airbag sensor assemblies, driver's seat position sensor, driver's seat belt buckle switch, seat belt pretensioner assemblies, inflators, warning light, interconnecting wiring and power sources. (For details, see "Service reminder indicators and warning buzzers" on page 48.) " 1 2 3 4 Seat belt pretensioner assembly SRS warning light Airbag sensor assembly Front airbag sensors The seat belt pretensioner system mainly consists of the above components, and their locations are shown in the illustration. The seat belt pretensioners are controlled by the airbag sensor assembly. The airbag sensor assembly consists of a safing sensor and airbag sensor. When the seat belt pretensioners are activated, an operating noise may be heard and a small amount of smoke-like gas may be released. This gas is harmless and does not indicate that a fire is occurring. Once the seat belt pretensioners have been activated, the seat belt retractors remain locked. 133