2003 Lexus GX 470 Owners Manual - Page 721

AUDIO Using your rear seat audio system: some basics The following instructions are for the rear passengers. Please let the rear passengers read and follow the instructions when the rear passengers use the rear audio system. This section describes some of the basic features of the Lexus audio system. Some information may not pertain to your system. Your audio system adjusts to the optimum volume and tone quality automatically. While the system is adjusting the audio sound, the audio sound fades out and then fades in. Your audio system works when the ignition switch is in the "ACC" or "ON" position. Turning the system on and off Push "ON/SOURCE" button to turn on the rear seat audio system. Use "ON/SOURCE" button to select an audio mode when the rear seat audio system is on. Each time you push this button, the system changes between the radio, cassette player and compact disc player. When you change the mode, the display indicates which mode is selected. When a cassette tape and compact discs are not loaded in the front audio system, only a radio mode can be selected in the rear seat audio system. If you push "ON/SOURCE" button on rear seat audio system controller to select the casette tape player mode or compact disc player mode in that case, a beep sounds from front audio system and "INVALID" flashes on the screen for 6 seconds, and then the rear audio system returns to the radio mode. NOTICE To prevent the battery from being discharged, do not leave the car audio on longer than necessary when the engine is not running. 224