Hi dave? Don here. Have you found a solution to your problem yet? Coz im also facing the same 'Error3' problem. Pulled out the HU, no cds were stacked, so i have no idea wats wrong.
Iv been thinking of hooking up an external cd changer, but from what iv seen in your post, it wont help, unless i look for a fijutsi cd changer.
So i just wanted to find out whats the way foward.
Im new to LOC, So pliz forgive me for the long essay.
Thanks
Dontezza