How do I set my car clock?

I purchased a vehicle and it came with a JVC Sirius Ready KD-S31 WMA MP3 stereo. I have tried multiple combinations. One I thought I had come across on the internet was to hold Select and press Mode to chance the hour and press the Volume controls for the minutes. However, this did not end up working. So I tried turning the vehicle on and off just to see if it would make a difference. Just as well, it did not work. Help would greatly be appreciated that way I know how much time I have to procrastinate. :)