Check Speaker Output With Line Diag Mode

WARNING: This page is about a different car, the 2016 Subaru Impreza and 2016 Subaru Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: Identifying Ignition Switch To ACC Button
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NOTE: Pressing the button (c) 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.

Fig 2: Screen Display - Line Diag
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Touch {Audio Check} on the {Line Diag} screen.
{Audio Check} screen is displayed.

Fig 3: Display - Audio Check Screen
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Touch the {ON} key of {Speaker Check} to check speaker output.
NOTE:
- The speaker front left → front right → rear right → rear left will sound in order for 2 seconds each.
- The speaker sounds at the maximum volume during speaker check.
- Press the {BACK} key to return to the {Line Diag} screen.