Check if track information is displayed normally on another "Bluetooth" audio compatible vehicle of the same model.

Check if the portable player operates normally.

Check the portable player settings.

Check if the other caller can hear your voice properly.

Check if the voice on the other side can be heard using a cellular phone.

Check if the cellular phone can make calls in a certain place.

Check if the "Bluetooth" settings are correct.

Proceed to the next step according to the table below.

Set "BASS", "MID" and "TREB" to the initial values and check that sound is normal.

Check the radio automatic station search function.