This is an old thread, but my Pioneer AVIC HD3BT is also old and has starting to acting weird and I suspect the harddrive needs to be replaced or fixed.
Can this unlocking method be used for swapping the harddrive with a new one? (Of course after I cloned the old disk into the new disk..)
Can I even put in larger disk?
What about using a SSD disk?
The fault in my unit is that sometimes when I start playing a song, after a few second it would skip the song to the next. It can continue doing this for a few song from that album. If I play songs from an album I have put on later it works fine. I also had one time when the unit stopped playing anything from the harddrive. But after a few hours just listening to the radio, then the harddrive started to work again and it was back to normal. But from time to time it can still skip songs. Then I just have to stop using it for a period and it fixes itself somehow...