Garmin G1000 NAV III Line Maintenance Manual page 114

2.11.2.2.2 Control Processor
The control processor contains the logs that are found in these processors:
3 – Pitch Servo
5 – Roll Servo
9 – Pitch Trim Servo
There are two main groupings of faults that can occur in the control 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.
CONTROL PFT STEP
"INT COMM TEST FAIL"
"CTL MOT PWR ON FAIL"
"MON MOT PWR ON FAIL"
"HALL 1 FAIL"
"HALL 2 FAIL"
"HALL 3 FAIL"
"HALL 4 FAIL"
"HALL 5 FAIL"
"HALL 6 FAIL"
"CURR OFFST FAIL"
"SVO TYPE FAIL"
"CERT DATA UNINSTALLED"
"STRAP CODE MISMATCH"
CONTROL FAULT
"GIA DIS FAULT"
"HOST DATA DIF"
"HOST DATA INV"
"SVO PWR INV"
"STRP CODE CHNG"
"MET STUCK SWTCH"
"MET STATUS DIF"
Page 2-86
Rev. L
PFT Faults
NOTES
This can sometimes be a result of a failure on the other board, check
faults on other processor
Check unit power and AP Disconnect power
Check unit power and AP Disconnect power
Check unit power and AP Disconnect power
Check unit power and AP Disconnect power
Check unit power and AP Disconnect power
Check unit power and AP Disconnect power
Check unit power and AP Disconnect 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 Control 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
G1000 Nav III Line Maintenance Manual
190-00352-00