Garmin G1000 Nxi System Maintenance Manual page 169

System Failure Troubleshooting
The following table provides basic troubleshooting guidance for LRU failures. Refer to G1000
Wiring Diagram, listed in Table 1-1, as needed to verify interconnects.
Invalid Data Field
Low Speed Awareness Band
permanently displayed
Low Speed Awareness Band
permanently inhibited
NAV1 & COM1
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
Associated
LRU(s)
•
With aircraft weight on wheels and the G1000 in
Configuration Mode, check that the RH GEAR ON GROUND
Discrete In indication for GIA2, on GIA I/O CONFIGURATION
page is illuminated.
•
With aircraft weight on wheels and the G1000 in
Configuration Mode, check that the LH GEAR ON GROUND
Discrete In indication for GIA1, on GIA I/O CONFIGURATION
GDU
page is illuminated.
•
If both indications are illuminated Green, switch GIA1 and
GIA2, to verify location of problem:

If problem is resolved, replace faulty unit.

If indication is not illuminated, check for wiring faults
between the GIAs and aircraft squat switch system.
•
With aircraft weight on wheels and the G1000 in
Configuration Mode, check that the RH GEAR ON GROUND
Discrete In indication for GIA2, on GIA I/O CONFIGURATION
page is illuminated.
•
With aircraft weight on wheels and the G1000 in
Configuration Mode, check that the LH GEAR ON GROUND
Discrete In indication for GIA1, on GIA I/O CONFIGURATION
GDU
page is illuminated.
•
If both indications are illuminated Green, switch GIA1 and
GIA2, to verify location of problem:

If problem is resolved, replace faulty unit.

If indication is not illuminated, check for wiring faults
between the GIAs and aircraft squat switch system.
•
Check configuration settings for GIA1 and PFD1.
•
Swap GIA1 and GIA2, to verify location of problem:

GIA1
If problem follows GIA1, replace GIA1.
•
Check Ethernet interconnect from GIA1 to PFD1.

If problem persists, replace PFD.
Solution
Page 156
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