iPod Operation With Audio Unit
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
When an iPod is connected to the audio unit with the USB port, you can navigate through the iPod's music files with the VOL/SELECT knob and the button on the audio unit. You cannot use the iPod's controls.
The AUX terminal is a sound input terminal. When you connect an iPod to the audio unit using the AUX terminal, the audio unit can not control the iPod except for the volume control. To select and play songs, use the iPod's control.
Because hardware and software continually change, make sure the iPod is compatible with the vehicle by referring to the applicable owner's manual.