The radio doesn't work.
Hi. There are several reasons why your radio can be inoperative. The radio in a vehicle gets power from a fuse. If the fuse blows, the radio will stop working. The unit itself can stop working. This doesn’t happen often, but it can happen. Lastly, if your radio says "locked" or "code", then it might need the unlock code to work again. This sometimes happens when the battery is disconnected. The code should come as a card with the vehicle if you bought it new. If not, the Toyota dealership can get the code for you. Proof of vehicle ownership might be necessary if you go this route. If you need further assistance, I recommend you have a certified technician, like one from YourMechanic, inspect the electrical components and replace any failing parts.