2006 Lexus GS 300 Owners Manual - Page 720

GAUGES, METERS AND SERVICE REMINDER INDICATORS CAUTION To reduce the chance of injury in case of an accident or a sudden stop, keep the switch box closed when not in use while driving. SERVICE REMINDER INDICATORS AND WARNING BUZZERS IF THIS INDICATOR OR BUZZER COMES ON ...or (Red indicator and buzzer) DO THIS. If parking brake is off, stop immediately and contact Lexus dealer. (a) G13106 (b) (Yellow indicator) The light sensitive optitron meter sensor is located under the high mounted stoplight. Take vehicle to Lexus dealer. If brake system warning light (red) is also on, stop immediately and contact Lexus dealer. NOTICE D Do not apply window tint or a sticker on the rear window. Otherwise the light sensitive optitron meter may not operate properly. D If snow, mud, frost or the like is attached to the rear window just behind the sensor, remove it soon, or the light sensitive optitron meter may not operate properly. 74 (c) (Indicator and buzzer) Fasten driver's seat belt. (d) WG5 Fasten front passenger's seat belt.