2015 Corolla Steering Wheel Radio Controls Not Working

#1
My 2015 Toyota Corolla LE, (ODO 23k miles) steering wheel radio controls are not working. The buttons affected are the phone/bluetooth controls, the volume up/down, and the mode buttons. The display button and cruise control work 100% of the time. I've taken it to the dealership but they wanted to charge me 200 for the diagnostics. What is the problem and how can I fix this?
 

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#2
Check the fuses, maybe try disconnecting and reconnecting the battery as well.

Is the car not under a warranty for some reason anymore? 23k miles it should be covered...
 
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