2003 Lexus LX 470 User Guide - Page 149

COMFORT ADJUSTMENT Front seat belt pretensioners 16x503b 16X252d "Roll sensing of curtain shield airbags off indicator light The driver and front passenger's seat belt pretensioners are designed to be activated in response to a severe frontal impact or a vehicle rollover. When the airbag sensor detects the shock of a severe frontal impact or a vehicle rollover, the seat belts are quickly drawn back by the retractor so that the belts snugly restrain the seat occupants. The front seat belt pretensioners are activated even if there is no passenger sitting in the front seat. Collisions occurring at certain speeds and angles may cause the seat belt pretensioners and SRS airbags not to operate all together. The seat belt pretensioners will not operate in a vehicle rollover if the roll sensing of curtain shield airbags off indicator light is on. For details, see "Roll sensing of curtain shield airbags off switch" on page 138. 131