2011 Lexus IS 350 User Guide - Page 98

1-7. Safety information n SRS warning light This warning light system monitors the airbag sensor assembly, front airbag sensors, side airbag sensor assemblies, driver's seat position sensor, driver's seat belt buckle switch, seat belt pretensioner assemblies, inflators, interconnecting wiring and power sources. (→P. 484) n If the SRS airbags deploy (inflate) l Bruising and slight abrasions may result from contact with a deploying (inflating) 1 Before driving SRS airbag. l A loud noise and white powder will be emitted. l Parts of the airbag module (steering wheel, airbag cover and inflator) as well as the front seats may be hot for several minutes. The airbag itself may also be hot. l The windshield may crack. l For Safety Connect subscribers, if the SRS airbags deploy or in the event of a severe rear-end collision, the system is designed to send an emergency call to the response center, notifying them of the vehicle's location (without needing to push the "SOS" button) and an agent will attempt to speak with the occupants to ascertain the level of emergency and assistance required. If the occupants are unable to communicate, the agent automatically treats the call as an emergency and helps to dispatch the necessary emergency services. (→P. 381) n SRS airbag deployment conditions (SRS front airbags) l The SRS front airbags will deploy in the event of an impact that exceeds the set threshold level (the level of force corresponding to an approximately 12 18 mph [20 - 30 km/h] frontal collision with a fixed wall that does not move or deform). However, this threshold velocity will be considerably higher if the vehicle strikes an object, such as a parked vehicle or sign pole, which can move or deform on impact, or if the vehicle is involved in an underride collision (e.g. a collision in which the front of the vehicle "underrides", or goes under, the bed of a truck, etc.). l It is possible that in some collisions where the forward deceleration of the vehi- cle is very close to the designed threshold level, the SRS front airbags and the seat belt pretensioners may not activate together. l The SRS front passenger airbag will not activate if there is no passenger sitting in the front passenger seat. However, the front passenger airbag may deploy if luggage is put in the seat, or the seat belt is fastened, even if the seat is unoccupied. (→P. 114) 105