1. The call volume of the mobile phone is not turned on.

2. The volume of the integrated car navigator is not turned on.

3. Go to "Settings zd" and "Sound" of the mobile phone, find the "Media" option, and turn up the volume of "Media".

4. There is no pairing connection between the car Bluetooth and the mobile phone. Settings-Bluetooth, find your connected car Bluetooth in the paired device, and click the settings icon at the back. There are call audio and media audio in the personal information, one is the voice for answering the phone, and the other is the voice played by the mobile phone. You can check which function you want to use in the back box. Because the volume of the call sound of the mobile phone is set separately from the volume of the media play of the mobile phone.

The use of car Bluetooth:

1, the first task is to turn on the mobile phone and car Bluetooth, search for car Bluetooth BYDAOUT (generally the name is basically the same), and then connect. It should be set to automatic connection, so that you can connect automatically when you get on the bus.

2. Before returning, set and open the music channel of the mobile phone on the multimedia;

3. Select mobile phone music in the multimedia initial interface, click Play, and the wonderful sound will return to music, from then on. After you get on the bus, just turn on the music on your mobile phone and you can play it. You can choose songs without taking them out of your pocket, but you can only search one by one. If you want to choose songs directly, you still have to choose from your mobile phone.

4. Car Bluetooth can not only listen to songs, but also make phone calls. In-vehicle Bluetooth mobile phone realizes the call function through the connection between the mobile phone with Bluetooth function and the in-vehicle equipment.