Clarion Navigation In-Car Entertainment - Manual (Page 93)

N.I.C.E. 93
4. Enter the new four-digit code using the keypad
buttons.
The unit prompts you to confirm the code.
5. Enter the new four-digit code again.
You have changed the lock code.
To exit without setting this option, press Enter or
MENU again.
Resetting factory defaults
To return the unit to the configuration it had when
you purchased it:
1. Press MENU.
The options menu appears.
Options menu
2. Press the FACTORY DEFAULT menu item.