2011 Lexus HS 250h Owners Manual - Page 502

5-2. Steps to take in an emergency Warning light Warning light/Details Tire pressure warning light When the light comes on: Low tire inflation pressure Correction procedure Adjust the tire inflation pressure. When the light comes on after Have the system checked by blinking for 1 minute: your Lexus dealer. Malfunction in the tire pressure warning system *1: Open door warning buzzer: →P. 511 *2: Driver's and front passenger's seat belt buzzer: The driver's and front passenger's seat belt buzzer sounds to alert the driver and front passenger that his or her seat belt is not fastened. The buzzer sounds intermittently for 10 seconds after the vehicle reaches a speed of 12 mph (20 km/h). Then, if the seat belt is still unfastened, the buzzer will sound in a different tone for 20 more seconds. n SRS warning light This warning light system monitors the airbag sensor assembly, front airbag sensors, side and curtain shield airbag sensors, curtain shield and rear side airbag sensors, driver's seat position sensor, driver's seat belt buckle switch, front passenger occupant classification system, "AIR BAG ON" indicator light, "AIR BAG OFF" indicator light, front passenger's seat belt buckle switch, seat belt pretensioner assemblies, inflators, interconnecting wiring and power sources. (→P. 108) n Front passenger detection sensor, passenger seat belt reminder and warning buzzer l If luggage is placed on the front passenger seat, the front passenger detection sensor may cause the warning light to flash and the warning buzzer to sound even if a passenger is not sitting in the seat. l If a cushion is placed on the seat, the sensor may not detect a passenger, and the warning light may not operate properly. 502