With Navigation

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

Remove the dashboard center vent (see DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION ).
Disconnect the 10P connector (A) from the audio-HVAC subdisplay unit (B).

Fig 1: Identifying 10P Connector And Audio-HVAC Subdisplay Unit
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the two screw and audio-HVAC subdisplay unit.
Install the audio-HVAC subdisplay unit in the reverse order of removal.