How do i get service code alert off my nissan tinos screen please its not on the list Nissan Tino

Hi there.I think i can help u to turn off service alert, Its done in the following way:-
1.Switch ignition on ( do not start engine )
2.Switch radio ON.
3.Start engine.
4.Switch radio OFF.
5.Press and hold INFO button.
6.Turn volume control knob at least 30 clicks until self dianostic menu is displayed and an audible
signal is heard. ( while still holding the INFO button )
8.Using the circular dial ( Joystick ) select Confirmation/Adjustment and press centre of joystick
to ENTER.
9.Select Service and press ENTER.
10.Select Reset and press ENTER
11Press BACK button to return to main menu.
12.Switch OFF ignition
This should do the job, sorry it`s so long winded
Good luck John ( South Wales UK)