TOYOTA 2012 Tacoma - Manual (Page 325)

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