Garmin G1000 Maintenance Manual page 63

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IN 2 GDC 74B #1
G1000 System Maintenance Manual
190-00903-00
MFD/GDC 74B #1 data path is functioning correctly
MFD/GDC 74B #1 data path is not functioning correctly.
•
Check PFD1 Alert Window for MFD or GDC
configuration or software error messages. Correct
any errors before proceeding.
•
Verify GDC 74B #1 status is OK using the AUX –
SYSTEM STATUS page on the MFD. If it has a
Red-X, troubleshoot why the GDC is offline before
proceeding.
•
Swap MFD and PFD1 (if the same P/N) to confirm if
the problem is in the original MFD.
−
Replace original MFD if box turns green after
swapping displays.
•
Check the MFD/GDC 74B #1 interconnect wiring
and unit connector pins for faults.
•
Replace GDC 74B #1.
MFD/GDC 74B #1 data path functionality is unknown.
Reload MFD configuration file.
Page 5-17
Rev. A