Radio theft protection page 372 owners manual
Your vehicle's audio system may disable itself if it is disconnected from electrical power for any reason. To make it work again, you must enter a specific five-digit code with the preset buttons. Because there are hundreds of number combinations possible from the five digits, making the system work without knowing the exact code is nearly impossible.
Page 563 - 569 fuse box locations
http://techinfo.honda.com/rjanisis/pubs/OM/K41010/K41010OM.PDF
How To Find Your Acura Radio Code
https://www.youtube.com/watch?v=6AzLh4FeOC0
you might get lucky with this one. should not hurt to try.
How to bypass unlock radio with out entering code on Honda or Acura.
https://www.youtube.com/watch?v=ZWLVZ4QU-7g
Acura TL (2010 - 2011) - fuse box diagram
https://www.autogenius.info/acura-tl-2010-2011-fuse-box-diagram/
If you have no power to radio at all you may need to check all the fuses I do not see a fuse labeled radio but you have 3 fuse boxes.
Drivers side, passenger side and under hood.
Sorry I could not give a exact location.
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