I know it's bad to reply to your own post, but I think I found the cause of my problems.
TSB: KEY REMINDER CHIME KEEPS CHIMING OR KEYLESS ENTRY INOPERATIVE -- 09-032-06-1633b
sorry for the pre-mature posting
Hi,
We just purchased a used '05 Mazda 3 (4 door) for the kid to drive around in. ..But have noticed a odd issue with the keyless entry system.
It seems to go in "sleep mode" if left in the driveway or at school for multiple hours, and will not respond to unlock/lock commands (not sure about...