My dealer made my key from my VIN, I assume they have records or it is encoded in some way....
However the book says:
Bulb on, Engine Starts: Open, Short, Wrong Resistance
Bulb On, Engine Does Not Start: Improper Key Value.
Bulb Flashes, Engine Does Not Start: If it flashes once per second and does not start, the PASS-Key II module sensed an open, short, or otherwise invalid (value matched none of the available 15 key codes) input from the ignition key resistor input. This operation mode could also be caused by malfunctioning power or ground circuits.