2009 Toyota Tundra Owners Manual - Page 354

3-2. Using the audio system n Operating portable audio devices connected to the audio system The volume can be adjusted using the vehicle's audio controls. All other adjustments must be made on the portable audio device itself. n When using a portable audio device connected to the power outlet or cigarette lighter Noise may occur during playback. Use the battery power source of the portable audio device to reduce noise. 326