You need a serial number to get the code to unlock the radio. Hold the 1 and 6 button to get your serial number, it should start with an M or a V followed by 6 or 7 digits. If this isn't what is ...
The radio is designed to lock up if the wrong code is repeatedly put in. You'll either be shown LOCK10 or LOCK13 message if it's locked. If it's on LOCK10, press and hold the number 6 button while ...