Toyota 2009 Yaris Hatchback Owner's Manual page 322

5-2. Steps to take in an emergency
Key reminder buzzer
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The buzzer indicates that the key has not been removed (with the engine
switch in the ACC or LOCK position and the driver's door opened).
Light reminder buzzer
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The buzzer indicates that the headlight switch is left on (with the key
removed and the driver's door opened).
If the malfunction indicator lamp comes on while driving
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First check the following:
Is your vehicle low on gas?
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If it is, refuel the vehicle immediately.
Is the fuel tank cap loose?
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If it is, tighten it securely.
The light will go off after taking several driving trips.
If the light does not go off even after several trips, contact your Toyota dealer
as soon as possible.
Front passenger detection sensor and passenger seat belt reminder
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If luggage or other load is placed on the front passenger seat, depending on
its weight, the reminder light to flash and buzzer to sound.
When the tire pressure warning light comes on
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Check the tire inflation pressure and adjust to the appropriate level.
The tire pressure warning light may turn on due to natural causes
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The tire pressure warning light may turn on due to natural causes such
as natural air leaks or tire inflation pressure changes caused by temper-
ature. In this case, adjusting the tire inflation pressure will turn off the
warning light (after a few minutes).
When a tire is replaced with a spare tire
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The compact spare tire is not equipped with the tire pressure warning
valve and transmitter. If a tire goes flat, the tire pressure warning light will
not turn off even though the flat tire is replaced with the spare tire.
Replace the spare tire with the repaired tire and adjust the proper tire
inflation pressure. The tire pressure warning light will turn off after a few
minutes.
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