Muting Signal Logic

The audio muting logic is orchestrated by the audio unit The audio unit determines what audio source has priority to use the speakers

The priority of the audio sources is as follows

HFL has the highest priority, followed by navigation, and finally the radio/CD-DVD player The priority is passed by HFL to the audio unit by dedicated mute wires The navigation mute signal is passed to the stereo amplifier

The navigation unit temporarily disables the voice control buttons, but allows guidance to be heard In addition, the audio unit suppresses the output from the audio unit, XM receiver, disc player, or other audio accessories

When the navigation system sends out a voice route guidance command, the audio front speaker is muted, and the navigation voice is heard in the front speakers

When the navigation voice control system is in use, all of the speakers are muted, and the navigation voice prompts are heard from the front speakers