Garmin G1000 System Maintenance Manual page 292

26. Press the NAV key until 2 is lit. Verify the tuning box is present around the NAV 2 frequency on
PFD1.
27. Using GCU477 keypad, enter in a frequency of 108.00. Verify NAV1 frequency changes as
entered.
28. Press the XPDR key until the light to the left of the button is lit. Verify a flashing box appears in
the XPDR 1 code window.
29. Using GCU477 keypad, enter in a code of 1234. Verify XPDR1 shows a code of 1234 in the
window.
30. Press the XPDR key until the light to the right of the button is lit. Verify a flashing box appears in
the XPDR 2 code window.
31. Using GCU477 keypad, enter in a code of 1234. Verify XPDR2 shows a code of 1234 in the
window.
If no other service is to be performed, continue to the return-to-service checks in Section 8.
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Revision 4
G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
190-00716-01