1. Ignition "ON", count to 3.
2. Depress/Release pedal 5 times...hard and fast.
3. Count to 10 (not 7!) and fully depress pedal
4. Count to 12 (SES should be blinking), release pedal
5. Count to 10, depress pedal
6. Count to 10, release pedal.
7. Turn off ignition, then start engine. Done!

Does this work with all nissans?

I'm not sure where you heard that but all you have to do is disconnect the ground terminal on the battery for a minute or so and it will reset the ECU.

some people say some times it takes up to 24 hours for the ecu to really reset..

nope, just disconnect the battery like dtm said