Garmin G1000 System Maintenance Manual page 175

5.10.4
GPS
Symptom
Will Not Acquire Satellites
G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
190-00716-01
Recommended Action
•
Ensure that a cell phone or a device using cell phone technology is
not turned on (even in a monitoring state) in the cabin.
•
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.).
•
Check date and time on Date/Time Setup Page.
If date and time are incorrect, enter the correct date and time.
•
Switch GIA1 and GIA2, to verify location of problem:
If problem follows unit, clear the GPS almanac by performing
the following steps –
Using the PFD in config mode, go to the GIA RS-
o
232/ARNIC 429 Config Page.
At the top of the screen, select the GIA that can not acquire
o
satellites (GIA1 or GIA2) and press the ENT key.
Press the "CLR NV" softkey at the bottom of the screen.
o
Select "OK" in the "Clear GIA nonvolatile memory?" pop-up
o
window.
Next reload GIA Audio and Config files from a loader card,
o
see Section 4.3 and on for instructions. Be sure to reload
the config files for any optional equipment installed on the
aircraft that require the GIA config to be updated.
•
Cycle power on the system and allow it to restart in normal mode.
Place the aircraft outside and allow 15-30 minutes for the GPS to
acquire a position and download a new almanac.
If clearing nonvolatile memory is unsuccessful and the GPS
still can not acquire a position, replace the GIA.
If problem does not follow unit, check GPS antenna and cabling.
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