2004 Lexus GX 470 Owners Manual - Page 184

OCCUPANT RESTRAINT SYSTEMS "Roll sensing of curtain shield airbags off (RSCA OFF) indicator light The seat belt pretensioners will not operate in a vehicle rollover if the "RSCA OFF" indicator light is on. For details, see "Roll sensing of curtain shield airbags off switch" on page 193. " 1 Front airbag sensors 2 Seat belt pretensioner assemblies 3 SRS warning light 4 Airbag sensor assembly The seat belt pretensioner system consists mainly 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 non-toxic gas may be released. This does not indicate that a fire is occurring. This gas is normally harmless. Once the seat belt pretensioners have been activated, the seat belt retractors remain locked. 161