2012 Toyota 4Runner Navigation Manual - Page 434

SETUP Telephone settings - "Telephone settings" can be changed on the "Phone settings" screen. - Volume setting You can adjust the voice and ring volume. 1. Touch "Volume". 1. Push the "SETUP" button. 2. Touch "Phone". 2. Change each setting according to the following procedures. 3. When you complete all settings, touch "Save". Automatic volume settings for high speed The system will automatically increase the volume by one step up when the speed exceeds 50 mph (80 km/h). Please refer to the following pages for each setting. 230