Toyota prius Owner's Manual page 88

1-3. Opening, closing and locking the doors
If the smart entry & start system does not operate properly

 Locking and unlocking the doors: Use the mechanical key. (P. 558)
Starting the hybrid system: P. 559

 Electronic key battery depletion
 The standard battery life is 1 to 2 years.
 If the battery becomes low, an alarm will sound in the cabin when the
hybrid system stops. (P. 80)
 As the electronic key always receives 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. 453)
• The smart entry & start 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.
To avoid serious deterioration, do not leave the electronic key within 1 m

(3 ft.) of the following electrical appliances that produce a magnetic field:
• TVs
• Personal computers
• Cellular phones, cordless phones and battery chargers
• Recharging cellular phones or cordless phones
• Induction cookers
• Table lamps
 When the electronic key battery is fully depleted
P. 453
 Customization
Settings (e.g. smart entry & start system) can be changed.
(Customizable features P. 591)
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