How to Use the Audio System Self-diagnostic Function

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

Turn the ignition switch to ON (II).
Make sure the audio system is turned off.
Push and hold the preset No. 1 and No. 6 buttons.
While holding the buttons, push the power button (A) to on.

Fig 1: Identifying Power Button
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Release the buttons and the self-diagnostic mode begins.

When you are in the self-diagnostic mode, pressing a preset button starts the diagnostic mode that is assigned to that preset switch.

	Button operation	Desired result	Diagnostic procedure
	Press the preset No. 2 button	The audio unit (center panel) switch name and/or value should be displayed (Except power button)	Audio unit button(s) does not work (see AUDIO UNIT BUTTON DOES NOT WORK (WITHOUT NAVIGATION) ).
A	Press the preset No. 3 button	All of the segments should turn on, then turn off.	This test checks if any audio unit LCD segments are stuck on or are dead (off). If there are any segments stuck on or are dead, replace the audio unit.
B	Press the preset No. 4 button	When the parking light switch is on, the illumination steps should change from - step to 22 step while adjusting the dash brightness control knob	Audio unit button illumination does not work (see AUDIO UNIT BUTTON ILLUMINATION DOES NOT WORK (WITHOUT NAVIGATION) ). Gauge control module (Lighting)
C	Press the preset No. 5 button	When you drive the vehicle, the VSP indicates the vehicle speed in km/h.	Volume does not increase with speed (see VOLUME DOES NOT INCREASE WITH SPEED (WITHOUT NAVIGATION) ).

Fig 2: Screen Display - Preset Buttons

Courtesy of AMERICAN HONDA MOTOR CO., INC.

If the diagnosis result is not matching the desired result, do the applicable system troubleshooting.
The self-diagnostic mode ends when you turn off the audio unit or turn the ignition switch to LOCK(0).