Garmin G1000 Troubleshooting

GARMIN G1000 VHF COMMUNICATION SYSTEM - TROUBLESHOOTING
1. General
A. This section gives the troubleshooting procedures for the Garmin G1000 VHF Communication System. For a general
overview of the Garmin Communication System refer to Garmin G1000 VHF Communication System - Description and
Operation.
2. Tools and Equipment
NOTE: For the supplier publication part number and manufacturer data, refer to the Introduction - Supplier
Publication List.
• None.
• Multimeter.
3. Reference Material
• Chapter 21, Cowl Deck Cooling Fans Post-Maintenance Checks
• Garmin G1000 VHF Communication System - Description and Operation
• Garmin G1000 VHF Communication System - Adjustment/Test
• Comant VHF Antenna - Removal/Installation
• Chapter 34, Garmin G1000 Integrated Avionics System - Troubleshooting
• Chapter 34, Garmin G1000 Integrated Avionics System - Adjustment/Test
• Chapter 34, Garmin G1000 Integrated Avionics Unit - Removal/Installation
• Model 208 Wiring Diagram Manual.
4. Garmin VHF Communication System Troubleshooting
A. Do the Garmin VHF Communication System Troubleshooting.
(1) Connect external electrical power to the airplane.
(2) Make sure that the circuit breakers given in Table 101 are engaged.
Table 101. Circuit Breakers
Component Location
Left (No.1) Garmin GIA 63W
Integrated Avionics Unit
Right (No.2) Garmin GIA 63W
Integrated Avionics Unit
(3) Refer to Chapter 34, Garmin G1000 Integrated Avionics System - Adjustment/Test G1000 Architecture Verification
Check and make sure that:
(a) The correct software and configuration has been installed.
(b) All related systems are serviceable.
(c) The LRU serial number or a version number is not dashed.
(4) Make sure the COM1, COM2, GIA1 and GIA2 have check marks (green) next to their nomenclature on the list.
(a) This indicates the LRU is serviceable.
(5) Make sure that on the System Status List the COM1 and/or COM 2 do not show a red X .
(6) If the Garmin GIA shows an red X on the Avionics Status page, make sure that the electrical power and ground
connections to the GIA is serviceable. Refer to the Model 208 Wiring Diagram Manual, Chapter 20, Wiring -
Maintenance Practices.
(7) Remove electrical power from the airplane.
(a) Do a visual check and make sure that:
1 There is no physical damage to the applicable wire bundles.
2 There are no bent, broken or pushed back pins at the wire bundle connectors.
(8) When you did the Architecture Verification check, if a serial number or a version number is dashed on the Avionics
Status page do the steps that follow:
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Circuit Breaker Name
COM 1
NAV 1
COM 2
NAV 2
Model 208/208B Maintenance Manual (Rev 33)
23-10-00-1 (Rev 31)
Circuit Breaker Location
Avionics Circuit Breaker Panel
Avionics Circuit Breaker Panel
Avionics Circuit Breaker Panel
Avionics Circuit Breaker Panel
Print Date: Fri May 05 10:29:26 CDT 2023
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