How to check for audio system condition

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.

The audio system has a self-diagnostic function to help find problems with the audio system. To run the self-diagnostic function, do the following:

Turn the ignition switch to ON (II).
Make sure the audio system is turned off.
Push and hold the No. 1 and No. 6 buttons. While holding the buttons, push the VOL PUSH PWR knob to ON. Release the buttons and the self-diagnostic function begins.

Fig 1: Identifying Audio System Buttons (With Rear Entertainment And With Navigation)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Identifying Audio System Buttons (Without Rear Entertainment And With Navigation)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 3: Identifying Audio System Buttons (Without Navigation)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Pressing a preset button starts the diagnostic mode that is assigned to that preset button.
No. 3 button

Entire LCD lighting/light-out mode: Turns on/off the entire LCD to show the presence or absence of an LCD segment failure.

No. 4 button

Duty (for the Illumination dim) indication mode: Indicates the duty for the Illumination dim.

No. 5 button

Vehicle speed pulse indication mode: Indicates the vehicle speed pulse.

TITLE button

Bus line check mode: The audio communication line is checked between the DSP, EEPROM, and TUNER.

NOTE: To check for TUNER, start in AM/FM mode.