Subaru BRZ 2017 Owner's Manual page 435

Have the malfunction repaired immediately.
After taking the specified steps to correct the suspected problem,
check that the warning message and light go off.
Interior Exterior
buzzer buzzer

Once
Once 3 times
Warning message
(Flashes)
(Flashes in yellow)
(Flashes)
(Flashes in yellow)
5-2. Steps to take in an emergency
Details
Indicates that the
access key is not
present when
attempting to
start the engine.
Indicates that a
door other than
the driver's door
has been opened
and closed with
the push-button
ignition switch in
any mode other
than off and the
access key out-
side of the detec-
tion area.
Correction
procedure
Confirm
the loca-
tion of the
access
key.
Confirm
the loca-
tion of the
access
5
key.
435