Honda Accord Sedan 2022 Owner's Manual page 269

uuAudio System Basic OperationuSystem Updates
268
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5. Select Install Now or Install while
Vehicle OFF.
u A notification appears on the screen if
the update is successful.
1How to update
For battery protection, Install while Vehicle OFF
cannot be selected when the battery is low on power.
If you want to install the updated data, recharge the
battery or select Install Now.