Sony MEX-N5300BT Operating Instructions Manual page 32

For steering wheel remote control
operation:
ERROR
 Register again from the function where
the error occurred (page 19).
TIMEOUT
 Try completing the registration while
[REGISTER] is blinking (about 6 seconds)
(page 19).
For firmware update operation:
FILE ERROR: The updater is not stored in the
USB device.
 Store the updater in the USB device, then
try again (page 22).
UPDATE ERROR - PRESS ENTER: Firmware
update is not completed properly.
 Press ENTER to clear the message, then try
again.
During the update, do not turn the
ignition to the OFF position, nor remove
the USB device (page 23).
If these solutions do not help improve the
situation, consult your nearest Sony dealer.
If you take the unit to be repaired because of
device playback trouble, bring the device
that was used at the time the problem
began.
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GB