Ducati Scrambler Owner's Manual page 83

Press button (4) to confirm the fourth and last figure:
the 4-digit code starts flashing.
To memorise the new setting, keep button (4)
pressed for 3 seconds.
If new settings have been saved (D), "MEM" will be
shown, the "EXIT" option will be highlighted and its
box will be flashing.
To quit, press button (4).
If settings have not been saved, the instrument panel
will highlight again the string of four dashes "- - - -" of
the new PIN to allow the rider to try again and enter
a new code.
Note
You can change your PIN CODE an unlimited
number of times.
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4
1
4
2
2
1
4
Fig. 45
4