2007 Toyota Prius Owners Manual - Page 145

Any of the following conditions may occur, but do not indicate the malfunction: D You may hear a sound in the engine compartment when the driver's door is opened or the brake pedal is depressed with the hybrid system turned off. However, this does not indicate any trouble. (c) Front Passenger's Seat Belt Reminder Light and Buzzer This light acts as a reminder to have the front passenger buckle up the seat belt. Once the "IG−ON" mode is enabled, the reminder light flashes if a passenger sits in the front passenger seat and does not fasten the seat belt. Unless the front passenger fastens the belt, the light continues flashing. If the vehicle speed rises above 20 km/h (12 mph) without the belt fastened, a buzzer sounds. If luggage or other load is placed on the front passenger seat, depending on its weight, causing the reminder light to flash and buzzer to sound. D The red and yellow warning light may stay on for about 60 seconds after the hybrid system is started. It is normal if it turns off after a while. D You may hear a sound in the engine compartment after the hybrid system is turned on or off. However, this does not indicate any trouble. (b) Driver's Seat Belt Reminder Light and Buzzer The light and buzzer act as a reminder to buckle up the driver's seat belt. Once the "IG−ON" mode is enabled, the reminder light flashes and the buzzer sounds if the driver's seat belt is not fastened. Unless the driver fastens the belt, the light continues flashing and the buzzer sounds 4 to 8 seconds. If the vehicle speed rises above 20 km/h (12 mph) without the belt fastened, a buzzer sounds. D Depressing the brake pedal repeatedly may turn on the red and yellow warning light. It is normal if the light turns off and the buzzer stops sounding after a few seconds. D You may hear a small sound in the engine compartment after the hybrid system is started or the brake pedal is depressed repeatedly. This is a pump pulsating sound of the brake system, and it is not a malfunction. D You may hear a motor sound in the engine compartment when the brake pedal is depressed with the hybrid system off. D The brake pedal stroke may be short when you press the "POWER" switch with the brake pedal depressed. 128