SYSTEM DESCRIPTION SEAT BELT WARNING SYSTEM DESCRIPTION (a) Seat belt warning light operation for driver seat belt: The seat belt warning light on the combination meter assembly illuminates, blinks or turns off in accordance with the driver seat belt state, vehicle speed, shift lever position and parking brake state. (b) Seat belt warning light operation for front passenger seat belt: The seat belt warning light on the combination meter assembly illuminates, blinks or turns off in accordance with whether the front passenger seat is occupied, the front passenger seat belt state, vehicle speed, shift lever position and parking brake state. (c) Rear seat belt warning light: The rear seat belt warning light on the radio and display receiver assembly illuminates, blinks or turns off in accordance with the rear door state, vehicle speed and rear seat belt state. (d) Front seat belt warning buzzer: After turning the engine switch on (IG), if the driver seat belt is not fastened within 1.8 seconds, the seat belt warning buzzer in the combination meter assembly will sound at an interval of 1.2 seconds for 6 seconds. When the vehicle is driven at approximately 20 km/h (12 mph) or more with the front passenger seat occupied and the driver or front passenger seat belt not fastened, the seat belt warning buzzer in the combination meter assembly will sound once. When 24 seconds have passed after the buzzer sounded, the seat belt warning buzzer in the combination meter assembly will sound at an interval of 1.2 seconds for 6 seconds. After that, the seat belt warning buzzer in the combination meter assembly will sound at an interval of 0.4 seconds for 90 seconds. (e) Rear seat belt warning buzzer: When the vehicle is driven at approximately 20 km/h (12 mph) or more with a rear seat belt not fastened, the seat belt warning buzzer in the combination meter assembly will sound at an interval of 1.2 seconds for 6 seconds. After that, the seat belt warning buzzer in the combination meter assembly will sound at an interval of 0.4 seconds for 30 seconds. FUNCTION OF MAIN COMPONENTS
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Automatic Transaxle System: Fail-safe Chart
FAIL-SAFE CHART Description The fail-safe function minimizes the loss of operation when a malfunction occurs in a sensor or solenoid. Fail-safe (a) Fail-safe control list: Malfunctioning Part Function Transmission Revolution Sensor (NT) Lock up clutch control is prohibited. High response gear shifts ...