I've never heard of that fault. What's the actual fault code number?
On our '98 you pull out the #13 fuse in the right-side doorjamb fusebox. Maybe the same?? You have to reset your clock but not your radio theft code.
Or... try taking off one battery cable completely, and touching it to the other cable. That forces any capacitance power supplies to discharge. Just don't short the battery posts themselves.