for Method 1 (Multimedia units) refer to column left; for Method 2(CD head units) refer to column right.

Method 1   Select "STANDBY" in the Source menu   Press [SETUP] / [Software Information]   Check the Bluetooth Module Version

Method 2   Select "STANDBY"   Press [FNC] button to enter the Menu   Select [BT F/W Update]   Check the Bluetooth Module Version