Toyota SIENNA 2011 Quick Reference Manual page 96

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Electronic key battery depletion
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The standard battery life is 1 to 2 years.
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If the battery becomes low, an alarm will sound in the cabin when the
engine stops. (→P. 40)
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As the electronic key always transmits radio waves, the battery will
become depleted even if the electronic key is not used. The following
symptoms indicate that the electronic key battery may be depleted.
Replace the battery when necessary. (→P. 645)
• The smart key system or the wireless remote control does not operate.
• The detection area becomes smaller.
• The LED indicator on the key surface does not turn on.
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To avoid serious deterioration, do not leave the electronic key within 3 ft.
(1 m) of the following electrical appliances that produce a magnetic field.
• TVs
• Personal computers
• Recharging cellular phones or cordless phones
• Cellular phones, cordless phones and battery chargers
• Glass top ranges
• Table lamps
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When the electronic key battery is fully depleted
→P. 645
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Customization that can be configured at Toyota dealer
Settings (e.g. smart key system) can be changed.
(Customizable features →P. 761)
1-2. Opening, closing and locking the doors
I n f o r ma t i o n P r o v i d e d b y :
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