190-02207-A2
GPS 175/GNX 375/GNC 355 Part 23 AML STC Maintenance Manual
Rev. 3
Page 5-14
Figure 5-6 XPDR Alert Troubleshooting
Sheet 3 of 5
GNX 375 XPDR Alert
Messages
If fault still exists,
contact Garmin.
ADS-B In
ADS-B/ADS-R/
TIS-B Fault
1090
ADS-B In
1090 RX Fault
ADS-B In enabled
and both 1090
MHz and 978 MHz
receivers failed
Verify antenna is
compatible
Reload software
Inspect all wiring,
and coaxial cables
ADS-B In enabled
and the 1090 MHz
receiver failed
Verify antenna is
compatible
Reload software
Inspect all wiring,
and coaxial cables
Fault
Cause
Corrective
Action
Fault
Cause
Corrective
Action
Service Soon
ADS-B/NAV
Communication
Fault
XPDR board is
unable to
communicate with
ADS-B/NAV board
Fault
Cause
Corrective
Action
ADS-B In
Configuration
Fault
ADS-B In
configuration data
did not load or is
invalid
Service Soon
Fault
Cause
Corrective
Action
ADS-B In
Electrical Fault
ADS-B In
Calibration Fault
Reload software
Electrical fault with
the ADS-B board.
Possible internal
hardware problem.
Check wiring
Factory ADS-B In
calibration data is
invalid
Reload software
Service Soon
Service Soon
Fault
Cause
Fault
Cause
Corrective
Action
Corrective
Action
Reset config and
Reconfigure unit
Reset config and
Reconfigure unit
Reset config and
Reconfigure unit
Reset config and
Reconfigure unit
Reset config and
Reconfigure unit
Reset config and
Reconfigure unit
Reload software
ADS-B In
Traffic
Alerting
TSAA Fault
ADS-B IN processing is enabled and the
input data does not meet the performance
specifications.
Verify valid GPS antenna has clear view
of the sky
Verify ADS-B In traffic is properly installed
and configured, display source, heading
source, GPS source are all configured
properly
Reset configuration and reconfigure unit
Reload software
Fault
Cause
Corrective
Action
Reload software