How to get into iPod Diagnostic Mode

Question

I followed someones advice to get into Diagnostic Mode...duplicated below.
Problem is after rebooting iPod and the apple logo appears the button combination didn't work to get into Diag Mode for my iPod. Anyone know the combination for a 15GB docking (touch wheel) iPod????
Instructions provided on forum:
1)Maybe you have damaged hard drive, you can check that by running a HDD Scan.
2)To do that you need to get into diagnostic mode.
§First reset the iPod
§How to reset iPod:
1.Connect iPod to the iPod Power Adapter and plug the power adapter into an electrical outlet.
2.Toggle the Hold switch on and off. (Slide it to Hold, then turn it off again.)About 4 times, when you are finished make sure it is not on hold.
3.Press and hold the Menu and Select buttons (select is the middle button) until the Apple logo appears, about 6 to 10 seconds. You may need to repeat this tep.There are two small pins within the iPod that need to make a connection to reset the iPod the pressure has to be just right. Sometimes it is easier to do this if you put the iPod on a flat surface.
§Then as soon as you see the apple come up on the screen, change to pressing select and the previous arrows (the arrows that are pointing to the left).
§The screen will change it will say IRAM PASS, DIAG VER.
§PRESS PLAY TO CONTINUE.
§Press play to continue and then using the advance arrows, (arrows that point to the right), scroll down to the HDD SCAN and press select.
§It should take anywhere from 45 mins to around 2 hours for the scan to run.
§The scan will tell you exactly if your hard drive is damaged. This also can have effect on your battery life.

Answer 1

Actually, there's nothing you can do in Diagnostic Mode to create a problem, you can only check for them
Nope. HARD R/W will do a test of both writing and reading of the hard drive. This test is destructive, your data will be lost. There's also the CLEAR BLKS test and the HDD DROP test.
Not to mention that the scanning processes exercise the hard drive quite a bit, and frankly the iPod drive isn't made to stand that kind of abuse for very long.
In any case, there's realistically nothing you can test in diag mode that you can't test in other ways. A simple format will check the drive for sector errors (along with erasing it). There's very little point to using the diag mode.