2005 Toyota Tundra Owners Manual - Page 605

'05 TUNDRA_U (L/O 0504) D A rear passenger lifts the front passenger seat cushion with their legs. D Objects are placed under the front passenger seat. D The front passenger seatback is in contact with the rear seat. To ensure the system correctly detects an adult sitting in the front passenger seat, make sure the above do not occur. Make sure that the "ON" indicator is illuminated when an adult is seated in the front passenger seat. If the "OFF" indicator is illuminated, ask the passenger to sit up straight, well back in the seat, and with the seat belt worn correctly. If the "OFF" indicator still remains illuminated, either ask the passenger to move to the rear seat, or if that is not possible, move the front passenger seat fully rearward. The front passenger occupant classification indicator light will indicate "ON" and "OFF" when the ignition key is turned to the "ON" position. After about four seconds, it will go off. After that, the front passenger occupant classification system operates and judges whether to indicate "ON" or "OFF". With tachometer The SRS warning light will come on and front passenger occupant classification indicator light will indicate "OFF" if there is a malfunction in the front passenger occupant classification system. Without tachometer 99 2005 TUNDRA from Apr. '05 Prod. (OM34440U)