TOYOTA 2011 FJ Cruiser - Manual (Page 326)

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3-4. Using the hands-free phone system (for cellular phone)
Locking or unlocking the phone book
Select “Phonebook Lock (Phone book lock)” or “Phonebook
Unlock (Phone book unlock)” using a voice command or
.
Input the PIN by either of the following methods and select
“Confirm” using a voice command or :
a. Press the talk switch and say the registered PIN.
b. Input a new PIN using .
Setting voice guidance volume
Select “Guidance Volume” using .
Change the voice guidance volume.
To decrease the volume: Turn counterclockwise.
To increase the volume: Turn clockwise.