Audio-Navigation unit button does not work (with navigation)

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the vehicle battery condition first (see BATTERY TEST ).
Check the connectors for poor connections or loose terminals.
In order to troubleshoot the main power switch, go to AUDIO-NAVIGATION UNIT POWER SWITCH WILL NOT TURN ON

Go into the Detail Information & Settings select Unit Check, and use the Audio key test under Hard key (see COLOR PATTERN ).
Do the buttons work properly?

YES -Operation is normal.

NO -Substitute a known-good audio-navigation unit (including the HDD) (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ). If the symptom/indication goes away, replace the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ). If the symptom still present, substitute a known-good audio-navigation panel (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the audio-navigation panel (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).