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G1000 System Maintenance Manual
Page 5-57
190-00903-00
Rev.
A
5.1.6.16
GCU 475 Advisory Messages
Advisory Message
Possible Cause
Recommended Actions
GCU CNFG – GCU Config error.
Config service req’d.
The G1000 has detected a
GCU 475 configuration
mismatch.
a.
Load GCU configuration files,
b.
Replace
GCU.
c.
If problem persists, replace
master configuration module,
check config module wiring for
faults and replace if necessary.
NOTE
New Terrain/Obstacle cards,
Jeppesen Aviation Database
and other optional features (i.e.
TAWS unlock card) will need to
be replaced if the master
configuration module is
changed. The G1000 System
ID number will change to a new
number when installing a new
master config module. The old
Terrain and other cards will no
longer work as they will remain
locked to the old System ID
number.
GCU FAIL – GCU is inoperative.
The G1000 has detected a
failure in the GCU 475.
Replace the GCU 475.
MANIFEST – GCU software
mismatch. Communication
halted.
The system has detected an
incorrect software version
loaded in the GCU 475.
Load correct software version.