Subaru 2005 Legacy - Manual (Page 147)

2-22
Keys and doors
NOTE
If the code entered the second time is not identical
to the code entered the first time, an error will oc-
cur. In this event, perform the procedure again be-
ginning with part 5. If an error occurs five times,
perform the procedure again starting with part 3.
10.If you wish to program another transmitter code
into the system (up to four transmitter codes can be
programmed into the system), perform the procedure
beginning with part 4. When you have finished pro-
gramming all of the necessary transmitter codes into
the system, remove the key from the ignition switch.
11.Test every registered transmitter to confirm correct
operation.
! Deleting old transmitter codes
The control unit of the keyless entry system has four
memory locations to store transmitter codes, giving it
the ability to operate with up to four transmitters. When
you lose a transmitter, the lost transmitter’s code re-
mains in the memory. For security reasons, lost trans-
mitter codes should be deleted from the memory.
To delete old transmitter codes, program four trans-
mitter codes into the system. If you have only one cur-
rent transmitter, program it four times. If you have two
current transmitters, program each one twice. If you
have three current transmitters, program two of them
once and the third one twice. This process will leave
only current transmitter codes in the system’s memo-
ry.
NOTE
Make sure no one else is operating their keyless
entry system within range of your vehicle when
programming transmitters. If someone else were
to operate their remote transmitter while you are
programming your transmitters, it is possible that
their transmitter code will be programmed into
your system, allowing them unauthorized access
to your vehicle.