TOYOTA 2011 Avalon - Manual (Page 317)

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3-3. Using the Bluetooth
®
audio system
3
Interior features
AVALON_U (OM41428U)
Changing the passkey
Select “Set Passkey” using a voice command or .
Press the talk switch, say a 4 to 8-digit number, and select
“Confirm” using a voice command or .
When the entire number to be registered as a passkey has
been input, press again.
If the number to be registered has 8 digits, pressing of the knob is
not necessary.