Lexus 2004 GX470 Owner's Manual page 338

(p) Setting level of viewer restrictions
You can restrict the play back screen by setting the viewer
restrictions. You can prevent the restriction with a
password. Some discs do not supply a restriction.
To set the level of viewer restriction, push the "Parental" switch
on the "Setup Menu 1" screen. The "Enter Personal Code"
screen will appear.
Push the number for the password and the "Enter" switch. The
"Select Restriction Level" screen will appear.
If you enter a wrong number, push the "Clear" switch to delete
the number.
You cannot change the setting without inputting the password.
When you forget or change the password, push the "Clear"
switch ten times to initialize the password.
To return to the "Setup Menu 1" screen, push the "Back" switch.
Finish
AUDIO
323