Garmin G1000 Maintenance Manual page 93

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Advisory Message
GPS NAV LOST – Loss of GPS
navigation. GPS fail.
5.1.6.8 GIA Cooling Advisory Messages
Advisory Message
GIA1 COOLING – GIA1
temperature too low.
GIA2 COOLING – GIA2
temperature too low.
GIA1 COOLING – GIA1 over
temperature.
GIA2 COOLING – GIA2 over
temperature.
G1000 System Maintenance Manual
190-00903-00
Possible Cause
The G1000 has lost GPS
navigation information.
Possible Cause
GIA1 operating temperature
is too low.
GIA2 operating temperature
is too low.
GIA1 has exceeded its
operating temperature
range.
GIA2 has exceeded its
operating temperature
range.
Recommended Actions
a. Verify the area the aircraft was
traveling through did not have
loss of GPS coverage. FAA
NOTAMs may be issued for
periods of outages.
b. Using the MFD AUX – GPS
Status page, verify the signal
strength bars are not erratic. If
so, this indicates outside
interference is affecting the
GPS receivers. Find and
remove the source of
interference (i.e. cell phones,
FBO datalink antennas, etc.).
c. Check GPS antenna and
cabling.
Recommended Actions
Allow unit to warm up.
Allow unit to warm up.
a. Check fan, wiring and air tubing
for proper operation (if
applicable).
b. Replace cooling fan if unable to
determine if operating correctly.
c. Replace GIA1.
d. If problem persists contact
Garmin Aviation Product
Support for assistance.
a. Check fan, wiring and air tubing
for proper operation (if
applicable).
b. Replace cooling fan if unable to
determine if operating correctly.
c. Replace GIA2.
d. If problem persists contact
Garmin Aviation Product
Support for assistance.
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