I went out to my vehicle and it would not energize:

If you ignore the indicators of a low battery; blinking LED, Decrease in range, the key fob has one more measure to prevent you from having to use the emergency bypass. If you ignore the warning signs of a low battery the key fob will kick itself out of Automatic mode and put itself into manual mode as a way to preserve any power it may have left. You will need to press the unlock button on your key fob in order to get the vehicle to start. ** Warning** DO NOT rely on this as your indicator of needing to change your batteries.