Toyota SIENNA 2011 Quick Reference Manual page 560

3-5. Using the hands-free phone system (for cellular phone)
■
Steering wheel telephone switches
■
Microphone
494
Volume
The voice guidance volume
cannot be adjusted using
this button.
Hands-free phone system
off/ends a call/refuses a call
Hands-free phone system
on/starts a call
Press: Voice command sys-
tem on
Press and hold: Voice com-
mand system off
I n f o r ma t i o n P r o v i d e d b y :