Muting Signal Logic

WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

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:

HandsFreeLink has the highest priority, followed by, AcuraLink, navigation, and finally the radio/CD-DVD player. The priority is passed by HandsFreeLink and AcuraLink 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 door speakers are muted, and the navigation voice is heard in the center speaker.

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