Default [SPRINT] How to enable DIAG mode

There is a Galaxy Tab P-100
Late night I've been installed Cyanogenmod 9 (ICS 4.0.4) and can not enable DIAG mode by USB, 'cause I can't find out how. In Gingerbread it was very simple: just open "Notes" and type ##8778# but this way didn't work now.
Pls help.