TOYOTA 2010 Matrix - Manual (Page 229)

210
3-3. Using the hands-free phone system (for cellular phone)
■ Steering wheel
Volume
The voice guidance volume
cannot be adjusted by using
this button.
Hands-free phone system
on/starts a call (off-hook
switch)
Hands-free phone system
off/ends a call/refuses a call
(on-hook switch)
Press: Voice command sys-
tem on
Press and hold: Voice com-
mand system off
(talk switch)