Ford Focus 2004 Owner's Manual page 73

If the engine does not start, a
system malfunction has occurred.
Have the system checked by an
expert immediately.
To ensure a trouble-free
data exchange between the
vehicle and key, do not shield the
keys with any metal objects.
Controls and features
Key coding
A maximum of eight keys can be
coded using two other keys
previously coded for your vehicle.
Complete each of the following
steps within five seconds.
1. Insert the first key in the
ignition switch and turn to
position II.
2. Turn the key back to position 0
and remove from the ignition
switch.
3. Insert the second key in the
ignition switch and turn to
position II.
4. Turn the second key back to
position 0 and remove from the
ignition switch – the key coding
mode is now activated.
5. If an uncoded key is now
inserted in the ignition switch and
turned to position II within
10 seconds, this key is coded to the
system.
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