2009 Toyota Sienna Navigation Manual - Page 151

OTHER FUNCTIONS (iii) Setting the volume D Automatic volume settings for high speed You can set the volume one step up when the speed is over 50 mph (80 km/h). (When it is under 43 mph (70 km/h), previous volume is back.) Each time you touch "Adaptive Volume Control", you can switch on or off. 1. Touch "Volume" to display the "Volume Settings" screen. 2. Touch "−" or "+" to adjust the "Voice Volume" or "Ring Volume". "Voice Volume" ...Adjusting the other party's voice. "Ring Volume" ...Adjusting the ring volume. 151