Automatic Adjustment Of Volume; When Using A Voice Command; The System May Not Recognize Your Voice In The Following Situations - Toyota 2011 Sienna Owner's Manual

Automatic adjustment of volume

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When vehicle speed is 50 mph (80 km/h) or more, the volume automatically
increases. The volume returns to the previous volume setting when vehicle
speed drops to 43 mph (70 km/h) or less.

When using a voice command

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For numbers, say a combination of single digits from zero to nine, #
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(pound), ∗ (star), and + (plus).
Say a command correctly and clearly.
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The system may not recognize your voice in the following situations:

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When driving on a rough road
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When driving at high speeds
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When air is blowing out of the vents onto the microphone
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When the air conditioning fan emits a loud noise
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The following cannot be performed while driving:
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Operating the system with
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Registering a cellular phone to the system
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Changing the passkey
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→P. 511
3-5. Using the hands-free phone system (for cellular phone)
3
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