Garmin G1000 Line Maintenance Manual page 160

Uncontrolled if Printed
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4.7.8.2 GRS 79 System Messages
Table 4-12 lists GRS 79 related system messages, possible causes, and recommended
actions.
NOTE
If necessary, retrieve log from CMC Diagnostic Folder and provide it to the
OEM or Garmin for assistance with further troubleshooting.
System Message
AHRS MAG DB
AHRS1 CAL
AHRS1 CONFIG
AHRS1 GPS
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Page 4-76
Table 4-12. GRS 79 System Messages
Cause
AHRS magnetic model
database version
mismatch.
AHRS1 calibration error.
AHRS1 configuration
error.
AHRS1 using the
backup GPS path. The
primary GPS path has
failed.
Recommended Actions
• Update the magnetic field
model.
• Calibrate the AHRS per
Section 7.6.
• Reload configuration to the
AHRS.
• If the fault persists, check
the configuration module
wires for faults and replace
if necessary.
• If the fault persists, replace
the master configuration
module.
• If the message persists,
replace the GRS.
• Ensure no device using cell
phone, Wi-Fi, or Bluetooth
technology is turned on
(even in a monitoring state)
in the aircraft cabin.
• Check the GPS status for
GIA1 and GIA2 on the MFD
GPS Status page.
• If a GPS receiver cannot
acquire a position lock,
troubleshoot the GPS.
• If the fault persists, replace
the GIA.
• If the fault persists, replace
the GRS.
LMM for the Kodiak 100
190-02102-00 Rev.4