TOYOTA 2010 Yaris - Manual (Page 163)

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2-3. Operating the lights and wipers
■ Daytime running light system (if equipped)
● To make your vehicle more visible to other drivers, the headlights turn on
automatically (at a reduced intensity) whenever the engine is started and
the parking brake is released. Daytime running lights are not designed for
use at night.
● Compared to turning on the headlights, the daytime running light system
offers greater durability and consumes less electricity, so it can help
improve fuel economy.
■ Light reminder buzzer
A buzzer sounds when the key is removed and the driver's door is opened
while the lights are turned on.
NOTICE
■ To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is not run-
ning.