190-01115-01 G3X/G3X Touch Installation Manual - TroubleshootingRev. AA Page 33-133 TROUBLESHOOTINGIn this manual, the term ‘Red-X’ refers to a red “X” that appears on different areas of the display toindicate the failure of that particular function.Refer to the G3X Pilot’s Guide (190-01115-00) for a complete listing of System Status Messages.For additional assistance, contact your G3X Dealer, then for further help (if needed), contact GarminAviation Product Support at US Toll Free Number 1-888-606-5482, or US 1-913-397-8200.NOTEAny advisory or warning message indicated on the Info Page whlie on-ground should beinvestigated and resolved before flight.NOTEThe information in this section is for troubleshooting use only and does not supersede anyapproved Maintenance or Installation Manual instructions.33.1 General Troubleshooting1. Review the airframe logbook to verify if any G3X or other avionics or electrical maintenance hadbeen performed recently that may have contributed to the failure.2. Check for loose wire terminals on the circuit breaker connections on the power wire(s) causingintermittent power connections. Also, check for intermittent circuit breakers.3. Have ground power put on the aircraft.4. Turn on the G3X and record the system software level on the GDU start up page.5. After the system is initialized, note any Red-X’s on the displays, ALERT messages and Red-X’son the GDU.If the failure cannot be verified, proceed to the following physical inspection.1. Turn off the G3X and remove the interior panels to gain access to the ADAHRS. Inspect thephysical installation of the affected LRU.2. Check that the connectors are fully seated, and that the jack screw connectors are fully tightenedon both sides of the affected LRU’s connector.3. Check for a loose wire harness that is able to move around during flight. This condition may causethe wire to pull on or vibrate the connector, making intermittent connections.4. Ensure that the affected LRU is mounted securely. Use a screwdriver to check the tightness of thefour mounting screws.5. Look in the vicinity of the affected LRU for any heavy objects that may not be fastened tight to thestructure and induce vibration in the ADAHRS.6. Look for evidence of water or fluid contamination in the area around the affected LRU.7. Unplug the affected LRU’s connector and check for bent pins.8. Inspect the wire harness clamp on the rear of the connector to verify that it is not too tight andsmashing/shorting the wires. If the wire clamp is installed upside down, it has sharp edges that cancut into the wires. Verify the presence of protective wire wrap between the wires and the clamp.If the condition is not resolved by following the preceding instructions, contact Garmin Product Supportfor additional assistance. A Garmin Field Service Engineer may ask the technician to download the faultlogs to a PC and email the logs back to Garmin to help determine if the condition is caused by a G3X LRUor in the aircraft.
