Ford Truck Enthusiasts Forums - Anti Theft system question

I went to the Ford website and pulled up the owner's manual for your 2000 Expedition. Went to the anti-theft section and here is what it said (lots to read)...

SECURILOCK

Y PASSIVE ANTI-THEFT SYSTEM

Your vehicle is equipped with a coded-key anti-theft system. Only the

correct key

will be able to start your vehicle. If your keys are lost or
stolen, you must take your vehicle to your dealership for key
reprogramming.

This system provides an advanced level of vehicle theft protection. Your
vehicle’s engine can only be started with the two coded keys provided
with your vehicle. Each time you start your vehicle, the coded key is
read by the anti-theft system. If the key identification code matches the
code stored in the anti-theft system, the vehicle’s engine is allowed to
start. If the key identification code does not match the code stored in
the system or if a coded key is not detected (vehicle theft situation), the
vehicle’s engine will not operate.

If there is any anti-theft problem with your vehicle, ensure ALL coded
keys for that vehicle are brought to the dealership, to aid in
troubleshooting.

The SecuriLocky passive anti-theft system is not compatible with
aftermarket remote start systems. Use of these systems may result in
vehicle starting problems and a loss of security protection. Large metallic
objects, electronic devices on the key chain that can be used to purchase
gasoline or similar items, or a second key on the same key ring as the
PATS ignition key may cause vehicle starting concern and record DTC’s
under certain conditions. If present, you need to keep these objects from
touching the PATS ignition key while starting the engine. These objects
and devices cannot damage the PATS ignition key, but can cause a
momentary concern if they are too close to the key during engine start.
If a problem occurs, turn ignition OFF and restart the engine with all
other objects on the key ring held away from the ignition key. Check to
make sure the encoded ignition key is an approved Ford encoded

ignition key.

Spare coded keys can be purchased from your dealership and
programmed to your anti-theft system. Refer to

Programming spare
SecuriLocky keys for more information.
If one or both of your coded keys are lost or stolen and you want to
ensure the lost or stolen key will not operate your vehicle, bring your
vehicle and all available coded keys to your dealership for reinitialization.

Theft indicator

The theft indicator in the instrument cluster will operate as follows:

When the ignition is OFF, the theft indicator will flash briefly every
two seconds to indicate the anti-theft system is protecting your
vehicle.

When the ignition is turned to ON or START, the theft indicator will
light for three seconds and then go out. If the theft indicator stays on
for an extended period of time or flashes rapidly, have the system
serviced by your dealership or a qualified technician.

Programming spare SecuriLock

Y keys

Spare coded keys can be purchased from your dealership and
programmed to your anti-theft system (up to a total of eight keys). Your
dealership can program your new coded key(s) to your vehicle or you
can do it yourself using the following simple procedure. To program a
new coded key yourself, you will need two previously programmed coded
keys (keys that already operate your vehicle’s engine). If two previously
programmed coded keys are not available (one or both of your original
keys were lost or stolen), you must bring your vehicle to your dealership
to have the spare coded key(s) programmed.

Procedure to program spare SecuriLock

Y keys to your vehicle

New coded keys must have the correct mechanical key cut for your
vehicle.
Conventional (non-coded) keys

cannot be programmed to your vehicle.
You will need to have two previously programmed coded keys and the
new unprogrammed SecuriLocky key readily accessible for timely
implementation of each step in the procedure. Please read and
understand the entire procedure before you begin.
1. Insert the first previously programmed coded key into the ignition and
turn the ignition from OFF to ON (maintain ignition in ON for at least
one second).

2. Turn ignition to OFF and remove the first coded key from the ignition.
3. Within five seconds of turning the ignition to OFF, insert the second
previously programmed coded key into the ignition and turn the ignition
from OFF to ON (maintain ignition in ON for at least one second but no
more than five seconds).
4. Turn the ignition to OFF and remove the second coded key from the
ignition.
5. Within 10 seconds of turning the ignition to OFF, insert the new
unprogrammed key (new key/valet key) into the ignition and turn the
ignition from OFF to ON (maintain ignition in ON for at least one
second). This step will program your new key to a coded key.
6. To program additional new unprogrammed key(s), repeat this
procedure from step 1.
If the programming procedure was successful, the new coded key(s) will
start the vehicle’s engine. The theft indicator (located on the instrument
panel) will light for three seconds and then go out.
If the programming procedure was not successful, the new coded key(s)
will not operate the vehicle’s engine. The theft indicator will flash on and
off. Wait at least one minute and then repeat the procedure from step 1.
If failure repeats, bring your vehicle to your dealership to have the new
spare key(s) programmed.

REMOTE ENTRY SYSTEM

Your vehicle is equipped with a remote entry system which allows you to:

unlock the vehicle doors without a key.

lock all the vehicle doors without a key.

activate the personal alarm.
The remote entry features only operate with the ignition in the OFF
position.
If there is any potential remote keyless entry problem with your vehicle,
ensure ALL key fobs (remote entry transmitters) are brought to the

dealership, to aid in troubleshooting.

Hope this helps. If you need to look further at the manual (if you don't have the manual for your Expy), you can go to www.fleet.ford.com and go to the Maintenance section, and click on Owner's Manuals. Enter your info and your manual is pulled up.