Garmin G1000 NAV III Line Maintenance Manual page 113

2.11.2.2.1 Monitor Processor
The monitor processor contains the logs that are found in these processors -
2 – Pitch Servo
4 – Roll Servo
8 – Pitch Trim Servo
There are two main groupings of faults that can occur in the monitor processor:
The first grouping of faults can occur during the GSA unit pre-flight test (PFT). If there is a fault during PFT the
unit will not be able to transition to normal mode and the only way to clear this state would be to cycle unit
power.
The second grouping of faults can occur during normal mode. These faults generally cause a disconnect of power
to the GSA and report that a fault has occurred to the GIA.
The Notes column indicates any actions that can be taken to troubleshoot the problem in the aircraft by the
technician. Any faults that are not listed here indicate an internal problem requiring replacement of the servo. If
the items in the Notes column check out ok, replace the servo.
MONITOR PFT STEP
"INTERNAL COMM FAIL"
"UNSW POWER INV"
"MON SOL PWR ON FAIL"
"CTL SOL PWR ON FAIL"
"SOL PWR FAIL"
"CERT DATA UNINSTALLED"
"STRAP CODE MISMATCH"
MONITOR FAULT
"GIA DIS FAULT"
"HOST DATA DIF"
"HOST DATA INV"
"SVO PWR INV"
"STRP CODE CHNG"
"MET STUCK SWTCH"
"MET STATUS DIF"
G1000 Nav III Line Maintenance Manual
190-00352-00
PFT Faults
NOTES
This can sometimes be a result of a failure on the other internal servo
board, check faults on the other processor
Check unit power
Check unit power and AP Disconnect power
Check unit power and AP Disconnect power
Check unit power and AP Disconnect power
Upload the certification gain file to the Monitor board
Check the connector strap inputs to the unit
Normal Mode Faults
NOTES
Check the AP Disconnect power into the unit
Check the AHRS wiring to the system
Check the AHRS wiring to the system
Check unit power and AP Disconnect power
Check the connector strap inputs to the unit
Check the MET switch inputs into the system
Check the MET switch inputs into the system
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