What is the reason for no sound when playing songs after Bluetooth connection in Corolla?

[DeFinley]

First, check if the phone volume is turned off and turn it on; then check if the car navigation system's volume is turned on; also verify if the phone is successfully connected to Bluetooth. If the above checks are fine, it might be because some car Bluetooth systems, after connection, do not automatically switch to the Bluetooth media audio playback interface and continue playing the last media audio source, resulting in no sound during music playback. The functions of car Bluetooth: It uses advanced digital signal processors and language devices, suitable for any harsh environment, eliminating background noise and echoes, ensuring high-quality call effects for both parties, with an effective range of 10 meters; it automatically recognizes mobile phones and connects to them without the need for cables or phone holders. The Bluetooth technology in car Bluetooth systems has the same transmission system as mobile phones. If the car Bluetooth technology is fully integrated with the car's audio system, when using a Bluetooth-enabled phone with the car's audio system, it allows the owner to automatically switch the audio sound to mute during incoming calls and resume sound after hanging up. After installing a car Bluetooth system, the owner does not need to be distracted while driving to answer calls. To answer an incoming call, the user only needs to press a button lightly or use voice control, enhancing driving safety and convenience.