Subaru 2001 Impreza Owner's Manual page 37

Doors and locks
n The emergency override/programming button
HS1001BC
The Emergency Override/Programming button is used to disarm the
alarm system in case of a lost or broken transmitter. It is also used in
conjunction with the transmitter and vehicle ignition to program addi-
tional transmitters.
The Emergency Override Button is located under the driver's side
dash beneath the diagnostic connector.
B Security system operation
IMPORTANT
Security System and Keyless Entry Features Do Not Operate
when the Vehicle Ignition is on.
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