Check Speaker Output With Line Diag Mode And Antenna Connection

Turn the ignition switch to ACC.
Press the button (b) twice with the button (a) pressed.

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NOTE: Pressing the button (a) for 3 seconds or more, or turning the ignition switch from the OFF to ACC position can exit the diagnostic mode.
{Line Diag} screen is displayed.

Perform the speaker output check and antenna connection check with {the Audio Check} in the {Line Diag} screen.

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Courtesy of SUBARU OF AMERICA, INC.

Item	Contents	Inspection
MODE	Radio band switching	Check that the radio band (AM/FM) can be switched.
Seek UP/DOWN	Seek UP/DOWN operation	Check that the Seek UP/DOWN operation allows radio reception.
Speaker Check	Speaker check operation	Standard 4 speakers: Front door right → front door left → rear door left → rear door right speakers will sound in this order for 0.5 seconds each. 6 speakers: Front door right → front tweeter right → front tweeter left → front door left → rear door left → rear door right speakers will sound in this order for 0.5 seconds each. Brand: Front tweeter left → front door left → rear door left → rear door right → front door right → front tweeter right speakers will sound in this order for 0.5 seconds each.

NOTE:

The sound volume during the speaker check is different depending on the speakers.
- Standard speaker: Sounds at 30 steps.
- Brand speaker: Sounds at 25 steps.
Turn the VOLUME button to control the sound volume.