Ford Aviator 2005 Owner's Manual page 172

Locks and Security
Replacing coded keys can be very costly and you may want to store an
extra programmed key away from the vehicle in a safe place to prevent
an unforeseen inconvenience.
The correct coded key must be used for your vehicle. The use of the
wrong type of coded key may lead to a "no start" condition.
If an unprogrammed key is used in the ignition it will cause a "no
start" condition.
Programming spare keys
A maximum of eight keys can be coded to your vehicle. Only
SecuriLock keys can be used. To program a coded key yourself, you
will need two previously programmed coded keys (keys that already
operate your vehicle's engine) and the new unprogrammed key(s) readily
accessible for timely implementation of each step in the procedure.
If two previously programmed coded keys are not available, you must
bring your vehicle to your dealership to have the spare coded key(s)
programmed.
Please read and understand the entire procedure before you begin.
1. Insert the first previously
3
programmed coded key into the
ignition and turn the ignition from 1
2
(OFF/LOCK) to 3 (ON) (maintain
ignition in 3 (ON) for at least one
4
second, but no more than ten
seconds).
2. Turn ignition to 1 (OFF/LOCK)
1
and remove the first coded key
from the ignition.
3. Within ten seconds of removing the first coded key, insert the second
previously programmed coded key into the ignition and turn the ignition
from 1 (OFF/LOCK) to 3 (ON) (maintain ignition in 3 (ON) for at least
one second but no more than ten seconds).
4. Turn the ignition to 1 (OFF/LOCK) and remove the second coded key
from the ignition.
5. Within 20 seconds of removing the second coded key, insert the new
unprogrammed key (new key/valet key) into the ignition and turn the
ignition from 1 (OFF/LOCK) to 3 (ON) (maintain ignition in 3 (ON) for
at least one second, but no more than ten seconds). This step will
program your new key to a coded key.
172
2005 Aviator (231)
Owners Guide (post-2002-fmt)
USA (fus)