Garmin Diamond DA40, Maintenance Manual

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G1000/DA40 System Maintenance Manual Page 5-5
190-00303-03 Revision 6
The following table provides basic troubleshooting guidance for LRU failures:
Invalid Data Field
Associated
LRU(s)
Solution
NAV1 & COM1
GIA1
•
Check configuration settings for GIA1 and the PFD.
Check Ethernet interconnect from GIA1 to the PFD.
Switch GIA1 and GIA2, to verify location of problem:
9 If problem follows unit, replace defective unit.
9 If problem persists, replace defective PFD.
NAV2 & COM2
GIA2
Check configuration settings for GIA2 and the MFD.
Check Ethernet interconnect from GIA2 to the MFD.
Switch GIA1 and GIA2, to verify location of problem:
9 If problem follows unit, replace defective unit.
9
If problem persists, replace defective MFD.
GPS INTEG & Time
GIA1 or GIA2
Check GPS1 and GPS2 signal strength on the
3rd AUX page.
Check corresponding GPS antenna and cable.
Check Ethernet interconnect from PFD to GIA1 or MFD to GIA2.
Switch GIA1 and GIA2, to verify location of problem:
9 If problem follows unit, replace defective unit.
9 If problem persists, replace defective MFD or PFD.
XPDR FAIL
GTX 33
Check GTX RS-232 configuration settings for GIA1, GIA2, and
GTX 33.
Replace defective GTX 33.
TAS FAIL
AIRSPEED FAIL
ALTITUDE FAIL
VERT SPEED FAIL
GDC 74A
Inspect GDC 74A pitot/static plumbing integrity.
Inspect pitot/static ports and associated equipment.
For TAS failure, also check GTP 59 OAT probe as stated below.
Check GDC ARINC 429 configuration settings for the PFD, MFD,
GIA1, and GIA2.
9 If PFD, MFD, and GIA configuration settings are correct,
replace defective GDC configuration module according to
Section 6.8.
9 If problem persists, replace defective GDC 74A.
OAT
GTP 59
See above guidance for GDC 74A troubleshooting.
Replace GTP 59 probe:
9 If problem persists replace GDC 74A with a known good
unit.