H3 randomly won't start - pull battery & wait

[njhomer]

The problem started about a month after the BCM was replaced. It seems to be the time that matters the most. Pulling the battery and reconnecting has no effect if you try to start it immediately. The number of times I try cranking doesn't seem to matter either. I've tried waiting different lengths of time and the magic number is 45-60 minutes. Someone else suggested I try the work around for the early generation Passlock system, which was to leave the key in the on position for 10mins, then turn it off for 5 secs and try starting the engine again.