Ford 2009 Focus Owner's Manual page 80

Locks and Security
6. Turn the ignition from the 1 (off) position to the 3 (on) position. Keep
the ignition in the 3 (on) position for at least one second but not more
than 10 seconds.
7. Turn the ignition to the 1 (off) position.
8. Remove the previously programmed coded key from the ignition.
9. Within twenty seconds of removing the previously programmed coded
key, insert the unprogrammed key (new/valet key) into the ignition.
10. Turn the ignition from the 1 (off) position to the 3 (on) position.
Keep the ignition in the 3 (on) position for at least one second, but no
more than 10 seconds.
11. Your new, unprogrammed key is now programmed.
If the key has been successfully programmed it will start the vehicle's
engine and the theft indicator light will illuminate for three seconds and
then go out.
If the key was not successfully programmed, it will not start your
vehicle's engine and the theft indicator light will flash on and off, or stay
on for more than three seconds. If failure repeats, bring your vehicle to
your authorized dealer to have the new key(s) programmed.
To program additional new unprogrammed key(s), repeat this procedure
from Step 1 for each additional key.
80
2009 Focus (foc)
Owners Guide, 2nd Printing
USA (fus)