Subaru 2011 Impreza Owner's Manual page 106

NOTE
If you do not start entering the number
using the lock switch before the elec-
tronic tone stops sounding, an error
will occur. In this event, perform the
procedure again beginning with part 3.
9. When you have finished entering the
code a second time, an electronic tone will
sound for 1 second and automatic door
locking and unlocking operation will take
place once to indicate completion of
registration, provided the code entered
the second time is identical to that entered
the first time.
NOTE
If the code entered the second time is
not identical to the code entered the
first time, an error will occur. In this
event, perform the procedure again
beginning with part 5. If an error occurs
five times, perform the procedure again
starting with part 3.
10. If you wish to program another trans-
mitter code into the system (up to four
transmitter codes can be programmed into
the system), perform the procedure begin-
ning with part 4. When you have finished
programming all of the necessary trans-
mitter 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 remote 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 remains in the memory.
For security reasons, lost transmitter
codes should be deleted from the mem-
ory.
To delete old transmitter codes, program
four transmitter codes into the system. If
you have only one current transmitter,
program it four times. If you have two
current transmitters, program each one
twice. If you have three current transmit-
ters, program two of them once and the
third one twice. This process will leave
only current transmitter codes in the
system's memory.
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 transmit-
ters, it is possible that their transmitter
Keys and doors
code will be programmed into your
system, allowing them unauthorized
access to your vehicle.
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