Audio unit button does not work

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.

NOTE: To troubleshoot the main power switch, go to POWER SWITCH WILL NOT TURN ON (see ).

Refer to the following switch list, and find the appropriate switch for each button. Then do the following exercise to identify the switch that does not work by operating various buttons that only belong to that switch.
Switch list Switch A: AM/FM, XM, 6DDISC, AUX, DISP, SCAN, RPT, ASEL/RDM, SEEK±, DVD, REAR PWR, FRONT SOURCE, REAR SOURCE, REAR CTRL, ELECT, ROAD, PWR, SOUND, 1-6

Switch B: INFO, MAP/GUIDE, MENU, CANCEL, SET UP, AUDIO, interface dial/ display
Check to see if the buttons that do not function all belong to switch A.
Are they all switch A's?

YES - Substitute a known-good audio unit and recheck. If the symptom/indication goes away, replace the original audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ). If the symptom is still present, substitute a known-good audio panel and recheck. If the symptom/ indication goes away, replace the original audio panel (see AUDIO UNIT REMOVAL/INSTALLATION ).

NO - Go to Step 3.
Check to see if the buttons that do not function belong to switch B.
Are they switch B's?

YES - Faulty audio-HVAC display panel and audio unit. Replace the audio-HVAC display module.

NO - Check the connections between the interface dial and audio panel, and recheck the function. If the symptom is still present, substitute a known-good audio unit and recheck. If the symptom/ indication goes away, replace the original audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ). If the symptom is still present, substitute a known-good audio panel and recheck. If the symptom/indication goes away, replace the original audio panel (see AUDIO UNIT REMOVAL/INSTALLATION ).