Pioneer AVIC-S2 - Manual (Page 39)

4.8 Initiating Pair Mode
By tapping the Pair Mode button on the Bluetooth HF Phone main
screen, you can manually set your device to Pair Mode. Within the duration of
60 seconds, you can initiate the pairing process on your mobile phone to
discover your device as a hands-free device.
4.9 Closing Bluetooth HF Phone
To hide the Bluetooth HF Phone screen, tap the button on the
Bluetooth HF Phone main screen. Bluetooth HF Phone is still running in the
background.
4.10 Ending the Bluetooth Connection
When you turn off your device, the connection is ended. You can also end the
connection from your mobile phone.
33