Galaxy Note 4 and 2016 Honda Civic Android Auto no Sound

[AC Question]

I am currently using Samsung Galaxy Note 4, and I recently purchaseD 2016 Honda Civic, which the Android Auto feature is added. Whenever I connect my phone to car, the android auto functions well except the sound; there is no sound at all. And, I checked my volume and everything. In this case, how can I fix it??