Toyota SIENNA 2011 Quick Reference Manual page 313

2-3. Operating the lights and wipers
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If the Automatic High Beam indicator flashes...
It may indicate a malfunction in the system. Contact your Toyota dealer.
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Customization that can be configured at Toyota dealer or by the multi-
information display
The Automatic High Beam can be turned off.
(Customizable features →P. 761)
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Temporary lowering sensor sensitivity
The sensitivity of the sensor can be temporarily lowered.
To lower the sensitivity, push and hold
mirror for 15 to 20 seconds, and release. The indicator light on the inside
rear view mirror will flash to indicate that the sensitivity has been lowered.
Vehicles without a smart key system:
When the engine switch is turned to the "LOCK" position, the sensitivity will
be returned to its normal level.
Vehicles with a smart key system:
When the "ENGINE START STOP" switch is turned off, the sensitivity will be
returned to its normal level.
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button on the inside rear view
I n f o r ma t i o n P r o v i d e d b y :