Garmin G1000 NAV III Line Maintenance Manual page 37

2.1.5 Failed Path Messages (GDU Software Version 7.01 and later only)
The following message indicates there is a data path connected to the GDU (MFD or PFD) or the GIA 63/GIA
63W (1 or 2) that has failed
FAILED PATH – A data path has failed. Check configuration mode.
The FAILED PATH message is triggered by a timeout of any one digital channel. The channels that are checked
are listed on these pages in config mode:
1) GDU RS-232 / ARINC 429 CONFIG (PFD1, and MFD)
2) GIA RS-232 / ARINC 429 CONFIG (GIA1 and GIA2)
3) GIA CAN / RS-485 CONFIGURATION (GIA1 and GIA2)
Important: Once the FAILED PATH message has been triggered, it will remain on the list of messages until the
next power cycle. This latching was implemented so that for intermittent failures, the message would remain at
the end of the flight (to alert maintenance crew). Also, this keeps the crew from having to acknowledge message
repeatedly in the case of intermittent failures.
For GDU software version prior to 7.01, the data path boxes may not be present on the GDU and
GIA config pages. Troubleshooting failed path messages will require manually checking the data
lines using a continuity tester and may require swapping GDU's, GIA's or other units to
determine if the fault lies in the unit or wiring.
troubleshooting instructions for the red data boxes below to help find the cause of the fault.
The box next to each channel indicates the current status of the channel per the below.
Red = data path is known to be failed
Black = data path status is unknown
Green = data path is known to be good
The applicable data paths can be verified by viewing the configuration mode pages listed below.
G1000 Nav III Line Maintenance Manual
190-00352-00
NOTE
Garmin recommends following the
Page 2-9
Rev. L