I have lost the password for my Mitsubishi Pajero 2015's Bluetooth Hands-Free Phone System that is already paired with my Samsung Galaxy Note Edge.
Is there a way to know the password used to pair my Note Edge with the Pajero?
Your android device will not have the saved PIN anywhere because PIN is used only temporarily during pairing procedure So I think there isn't a way to reveal your PIN since it is not stored in you device. However you can remove and pair your note with pajero 2015 again.
The PIN is provided during the pairing process by one device or the other. It's nothing you would need to have noted elsewhere.