Toyota 2013 Prius Owner's Manual page 154

Antenna location and effective range
Antenna location
■
Effective range (areas within which the electronic key is
■
detected)
PRIUS PHV_OM_OM47787U_(U)
1-4. Opening, closing and locking the doors
Antennas inside cabin
When starting the hybrid system
or changing "POWER" switch
modes
The system can be operated
when the electronic key is inside
the vehicle.
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