TOYOTA 2010 Highlander - Manual (Page 477)

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5-1. Essential information
Emergency flashers
NOTICE
■
To prevent battery discharge
Do not leave the emergency flashers on longer than necessary when the
engine is not running.
Use the emergency flashers if the vehicle malfunctions or is
involved in an accident.
Vehicles without navigation system
Press the switch to flash all
the turn signal lights. To turn
them off, press the switch
once again.
Vehicles with navigation system
Press the switch to flash all
the turn signal lights. To turn
them off, press the switch
once again.