G1000 NAV III LINE MAINTENANCE MANUAL

1.1 Introduction........................................................................................................................................1-1 1.2 LRU Description................................................................................................................................1-2 1.3 G1000 Block Diagrams .....................................................................................................................1-6 1.4 User Interface.....................................................................................................................................1-9 1.5 Recommended Tools .......................................................................................................................1-17 2 TROUBLESHOOTING.....................................................................................................................2-1 2.1 G1000 Alerting System .....................................................................................................................2-1 2.2 GDU 104X.......................................................................................................................................2-19 2.3 GMA 1347 .......................................................................................................................................2-38 2.4 GIA 63/GIA 63W ............................................................................................................................2-43 2.5 GRS 77/GMU 44 .............................................................................................................................2-55 2.6 GDC 74A .........................................................................................................................................2-59 2.7 GEA 71 ............................................................................................................................................2-61 2.8 GTX 33 ............................................................................................................................................2-74 2.9 GDL 69/69A ....................................................................................................................................2-75 2.10 GDL 90 ............................................................................................................................................2-78 2.11 GFC 700 (BP 2007 and later only) ..................................................................................................2-79 2.12 Backshell Connectors ......................................................................................................................2-88 3 EQUIPMENT REMOVAL & INSTALLATION ............................................................................3-1 3.1 GDU 104X.........................................................................................................................................3-1 3.2 GMA 1347 .........................................................................................................................................3-1 3.3 GIA 63/GIA 63W ..............................................................................................................................3-1 3.4 GRS 77/GMU 44 ..............................................................................................................................3-2 3.5 GDC 74A ...........................................................................................................................................3-2 3.6 GEA 71 ..............................................................................................................................................3-2 3.7 GTX 33 ..............................................................................................................................................3-3 3.8 GDL 69/69A ......................................................................................................................................3-3 3.9 GDL 90 ..............................................................................................................................................3-3 3.10 GSA 81 ..............................................................................................................................................3-3 3.11 GSM 85..............................................................................................................................................3-4 3.12 Configuration Module........................................................................................................................3-5 3.13 GEA 71 Backshell Thermocouple .....................................................................................................3-6 Page iv G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 4 UPLOADING SOFTWARE, CONFIGURING, & TESTING .........................................................4-1 4.1 GDU 104X.........................................................................................................................................4-1 4.2 GMA 1347 .........................................................................................................................................4-5 4.3 GIA 63/GIA 63W ..............................................................................................................................4-8 4.4 GRS 77/GMU 44 .............................................................................................................................4-17 4.5 GDC 74A .........................................................................................................................................4-30 4.6 GEA 71 ............................................................................................................................................4-34 4.7 GTX 33 ............................................................................................................................................4-38 4.8 GDL 69A .........................................................................................................................................4-41 4.9 GDL 90 ............................................................................................................................................4-44 4.10 GSA 81 ............................................................................................................................................4-44 5 FINAL SYSTEM CHECKOUT ........................................................................................................5-1 5.1 GPS Failure Test................................................................................................................................5-1 5.2 GIA Failure Test ................................................................................................................................5-2 5.3 Display Failure Test...........................................................................................................................5-2 5.4 AHRS/Air Data Backup Path Test.....................................................................................................5-3 5.5 Flight Test..........................................................................................................................................5-3 6 PERIODIC MAINTENANCE ..........................................................................................................6-1 6.1 Introduction........................................................................................................................................6-1 6.2 GFC 700 Visual Inspection Procedure ..............................................................................................6-3 6.3 GSA 81 Greasing Procedure..............................................................................................................6-3 6.4 GSM Slip Clutch Checking and Adjustment Procedure....................................................................6-3 6.5 Category A Long Term Power Interrupt Annual Inspection Procedure ............................................6-4 APPENDIX A G1000 PINOUT LIST ..................................................................................................... A-1 A.1 GIA 63/GIA 63W ............................................................................................................................. A-1 A.2 GDU 104X...................................................................................................................................... A-12 A.3 GRS 77............................................................................................................................................ A-14 A.4 GMU 44 .......................................................................................................................................... A-15 A.5 GDC 74A ........................................................................................................................................ A-16 A.6 GEA 71 ........................................................................................................................................... A-18 A.7 GMA 1347 ...................................................................................................................................... A-22 A.8 GTX 33 ........................................................................................................................................... A-26 A.9 GDL 69/69A ................................................................................................................................... A-28 A.10 GSA 81 ........................................................................................................................................... A-30 G1000 Nav III Line Maintenance Manual Page v 190-00352-00 Rev. L APPENDIX B G1000 SYSTEM SOFTWARE & CONFIGURATION ................................................. B-1 B.1 Initial Software & Configuration Overview ..................................................................................... B-2 B.2 Final Configuration Items............................................................................................................... B-24 B.3 Software/Configuration Troubleshooting ....................................................................................... B-26 B.4 System Communication Hierarchy ................................................................................................. B-27 B.5 Aviation Database........................................................................................................................... B-28 B.6 TAWS Configuration...................................................................................................................... B-29 B.7 SD Card Use ................................................................................................................................... B-31 Page vi G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 LIST OF FIGURES FIGURE PAGE 1-1 Typical Cessna Nav III G1000 System Interconnect.........................................................................1-6 1-2 G1000 Flight Instrumentation Data Paths..........................................................................................1-7 1-3 G1000 Navigation/Communication Data Paths.................................................................................1-8 1-4 GDU 104X Control Interface ............................................................................................................1-9 1-5 GMA 1347 Control Interface.............................................................................................................1-9 1-6 FMS Control Knob ..........................................................................................................................1-10 1-7 G1000 Softkeys ...............................................................................................................................1-11 1-8 Configuration Mode Navigation......................................................................................................1-11 1-9 G1000 Configuration Storage ..........................................................................................................1-14 1-10 GRS/GDC Configuration Storage ...................................................................................................1-15 1-11 SET/ACTV Feature .........................................................................................................................1-16 1-12 Configuration Status ........................................................................................................................1-16 2-1 Red X’d Display Fields......................................................................................................................2-1 2-2 Alerts & Annunciations .....................................................................................................................2-6 2-3 System Status Page (AUX Group).....................................................................................................2-6 2-4 AFCS Annunciation Field .................................................................................................................2-7 2-5 RS-232/ARINC 429 CONFIG Page ................................................................................................2-19 2-6 GDU STATUS Page........................................................................................................................2-20 2-7 GDU TEST Page .............................................................................................................................2-22 2-8 DIAGNOSTICS Page ......................................................................................................................2-25 2-9 SERIAL/ETHERNET I/O Page.......................................................................................................2-26 2-10 ALERT CONFIGURATION Page ..................................................................................................2-27 2-11 AIRFRAME CONFIGURATION Page ..........................................................................................2-27 2-12 GMA CONFIGURATION Page .....................................................................................................2-38 2-13 GMA 1347 Data Paths.....................................................................................................................2-42 2-14 RS-232/ARINC 429.........................................................................................................................2-43 2-15 CAN/RS-485 CONFIGURATION Page .........................................................................................2-44 2-16 GIA I/O CONFIGURATION Page .................................................................................................2-45 2-17 COM SETUP Page ..........................................................................................................................2-46 2-18 GIA STATUS Page .........................................................................................................................2-47 2-19 AHRS/AIR DATA INPUT Page .....................................................................................................2-55 2-20 GRS 77 Data Paths ..........................................................................................................................2-58 2-21 GDC 74A Data Paths.......................................................................................................................2-60 2-22 ENGINE DATA Page......................................................................................................................2-61 2-23 GEA STATUS Page ........................................................................................................................2-62 2-24 GEA Configuration Page .................................................................................................................2-63 2-25 GEA 71 DATA Paths ......................................................................................................................2-65 2-26 MFD AUX – SYSTEM STATUS Page ..........................................................................................2-66 2-27 HSCM Offset Tool User Interface...................................................................................................2-67 2-28 CONFIGURATION UPLOAD Page (GDU software version 6.01 or earlier) ...............................2-68 G1000 Nav III Line Maintenance Manual Page vii 190-00352-00 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L 2-29 CONFIGURATION UPLOAD Page (GDU software version 7.01 or later)...................................2-69 2-30 HSCM Offset Tool User Interface...................................................................................................2-70 2-31 Example Post-Calibration Email .....................................................................................................2-71 2-32 HSCM Calibration Page ..................................................................................................................2-72 2-33 GTX 33 Data Paths ..........................................................................................................................2-74 2-34 GDL 69 Page ...................................................................................................................................2-75 2-35 GDL 69 Data Paths ..........................................................................................................................2-78 2-36 GFC CONFIGURATION Page .......................................................................................................2-79 2-37 GFC STATUS Page.........................................................................................................................2-80 2-38 GIA 63/GIA 63W Backshell Connectors ........................................................................................2-88 2-39 GEA 71 Backshell Connectors ........................................................................................................2-88 2-40 GMA 1347 Backshell Connectors ...................................................................................................2-89 2-41 GTX 33 Backshell Connectors ........................................................................................................2-89 2-42 GDU 104X Backshell Connector (P10001).....................................................................................2-89 2-43 GRS 77 Backshell Connector (P771) ..............................................................................................2-89 2-44 GDC 74A Backshell Connector (P741)...........................................................................................2-90 2-45 GDL 69/69A Backshell Connector (P691) ......................................................................................2-90 2-46 GDL 90 Backshell Connectors ........................................................................................................2-90 2-47 GSA 81 Connector (P801)...............................................................................................................2-91 4-1 Marker Beacon Symbology ...............................................................................................................4-7 4-2 Non-WAAS (GIA 63) System Status Page .......................................................................................4-8 4-3 WAAS (GIA 63W) System Status Page............................................................................................4-9 4-4 System Upload Page ..........................................................................................................................4-9 4-5 AUX-GPS STATUS Page ...............................................................................................................4-15 4-6 Pitch/Roll Offset ..............................................................................................................................4-21 4-7 Magnetometer Calibration ...............................................................................................................4-23 4-8 Engine Run-Up ................................................................................................................................4-25 4-9 Magnetometer Interference..............................................................................................................4-27 4-10 GEA CONFIGURATION ...............................................................................................................4-35 6-1 Backup Capacitor Test Selection.......................................................................................................6-2 6-2 Upload Complete Window ................................................................................................................6-3 6-3 BKUP CAPS Checkbox on GDU TEST Page...................................................................................6-3 B-1 Software/Configuration Overview (GDU Software Version 6.01 and earlier)................................. B-2 Page viii G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 LIST OF TABLES TABLE PAGE 4-1 GRS 77/GMU 44 Calibration ..........................................................................................................4-21 4-2 Example Magnetometer Interference Test Sequence ......................................................................4-28 6-1 Long Term Power Interrupt Category B (50 mS) Mod Status...........................................................6-1 6-2 T206H Slip Clutch Settings ...............................................................................................................6-3 6-3 T182T Slip Clutch Settings................................................................................................................6-3 G1000 Nav III Line Maintenance Manual Page 1-1 190-00352-00 Rev. L 1 GENERAL DESCRIPTION 1.1 Introduction This manual is intended to be a non-airframe specific top level maintenance manual that provides basic troubleshooting, removal and replacement instructions, software and configuration instructions, and return to service information for the G1000 system. Field service of the G1000 is limited to replacing LRUs (Line Replaceable Unit). The following outline describes the organization of this manual: Section 1: This section contains a brief description of each LRU and a basic overview of the G1000 system’s normal, reversionary, and configuration modes. The configuration mode user interface is described along with a brief summary of configuration mode functionality. Section 2: This section contains basic troubleshooting instructions for the G1000. Section 3: This section contains basic removal and replacement instructions for G1000 LRUs. Section 4: This section contains basic instructions for uploading software, configuring, and testing the G1000. Section 5: This section contains a checkout of the G1000 system. Only G1000-specific elements are addressed. Section 6: This section contains basic periodic maintenance instructions for the G1000 system. Appendix A: This section contains a list of G1000 pinouts. Appendix B: The section serves as a complete reconfiguration of the G1000 system. Page 1-2 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 1.2 LRU Descriptions GDU 1040/1044B: The GDU 104X display is the most visible portion of the G1000 system. The GDU 104X has a 10.4-inch LCD display with 1024 x 768 resolution. One is configured as a Primary Flight Display or PFD, the other is configured as the Multi-Function Display or MFD. The MFD shows navigation information and engine/airframe instrumentation. The PFD shows primary flight information, in place of traditional gyro systems. Both GDU 104Xs link and display all functions of the G1000 system during flight. The displays communicate with each other and the GIA 63/63W units through a High-Speed Data Bus (HSDB) Ethernet connection. The GDU 1044B provides autopilot controls. GMA 1347: The GMA 1347 integrates NAV/COM digital audio, intercom system and marker beacon controls. Manual display reversion is also controlled by the GMA 1347. The GMA 1347 is normally installed between the MFD and PFD. The GMA 1347 can also be installed in dual-audio panel applications (usually paired with a dual-PFD setup). The GMA 1347 communicates with both GIAs using RS-232 digital interface. Software and configuration settings are received through RS-232 digital interface with the GIA. GIA 63/63W: The GIA is the central ‘Integrated Avionics Unit’ (IAU) to the G1000 system. The GIA functions as a main communications hub, linking all LRUs with the PFD and MFD displays. The GIA contains the GPS receiver, VHF COM/NAV receivers, and system integration microprocessors. The GIA communicates directly with the GDU 104X displays using a HSDB Ethernet connection. Software and configuration settings are sent from the displays through the GIA to LRUs in the system. The GIA 63W contains a WAAS certified GPS receiver. G1000 Nav III Line Maintenance Manual Page 1-3 190-00352-00 Rev. L GRS 77: The GRS 77 is an attitude, heading, and reference, or AHRS, unit that provides aircraft attitude and flight characteristics information to the G1000 displays and GIAs. The unit contains advanced tilt sensors, accelerometers, and rate sensors. In addition, the GRS 77 interfaces with both the GDC 74A Air Data computer and the GMU 44 magnetometer. The GRS 77 also utilizes GPS signals sent from the GIA. Actual attitude and heading information is sent using ARINC 429 digital interface to both GDU 104Xs and GIAs. GMU 44: The GMU 44 magnetometer senses magnetic field information. Data is sent to the GRS 77 ARHS for processing to determine aircraft magnetic heading. This unit receives power directly from the GRS 77 and communicates with the GRS 77 using RS-485 digital interface. GDC 74A: The GDC 74A air data computer compiles information from the pitot/static system and various outside air temperature (OAT) and angle of attack (AOA) sensors. The GDC 74A is responsible to provide pressure altitude, airspeed, vertical speed, and OAT information to the G1000 system. The GDC 74A communicates with the GIA 63/GIA 63W, GDU 104X, and GRS 77 using ARINC 429 digital interface. Software and configuration settings are received through RS-232 digital interface with the GIA 63/GIA 63W. GEA 71: The GEA 71 is a microprocessor-based LRU that is responsible for receiving/processing signals from engine and airframe sensors. Sensor examples include engine temperature and pressure sensors as well as fuel measurement and pressure sensors. The GEA 71 communicates directly with both GIAs using RS- 485 digital interface. The GEA 71 can serve aircraft from basic single-engine platforms to sophisticated turbine propulsion systems. Software and configuration settings are received through RS-232 digital interface with the GIA. Page 1-4 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 GTX 33: Solid-state Mode-S transponder. Provides Modes A, C, and S functions. Control and operation is directed through the PFD. The transponder communicates with both GIAs through RS-232 digital interface. Software and configuration settings are received through RS-232 digital interface with the GIA. GDL 69/69A: The GDL 69/69A is an XM Satellite Radio data link receiver that receives broadcast weather data. The GDL 69A is the same as the GDL 69 with the addition of XM Satellite Radio audio entertainment. Weather data and control of audio channel and volume is displayed on the GDU 104X MFD, via a High- Speed Data Bus (HSDB) Ethernet connection. The GDL 69A is also interfaced to the GMA 1347 Audio Panel for amplification and distribution of the audio signal. GDL 90 The GDL 90 is a remote-mounted product that contains a GPS/WAAS receiver and a Universal Access Transceiver. The GDL 90 will transmit “ownship” data via the UAT data link. It will receive data from other UAT- equipped aircraft as well as FIS-B weather – the received data may be output to an appropriate display. G1000 Nav III Line Maintenance Manual Page 1-5 190-00352-00 Rev. L GSA 81 & GSM 85: The GSA 81 servo actuator is an electromechanical LRU that provides automatic control of pitch, roll, and pitch trim. It also provides manual electric trim functionality. The GSA 81 contains a motor-control and monitor circuit board, as well as a solenoid and a brushless DC motor. The GSA 81 receives serial RS-485 data packets from the GIA 63Ws. The GSM 85 servo mount is mounted to the aircraft structure, via a custom mounting bracket, and is responsible for transferring the output torque of the GSA 81 servo actuator to the mechanical flight-control surface linkage. GTP 59: The GTP 59 OAT Probe provides outside air temperature measurement which is used by the GDC 74A. Communication interface to the G1000 is through the GDC 74A. Page 1-6 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 1.3 G1000 Block Diagrams 1.3.1 Typical System Interconnect Figure 1-1 shows a typical Cessna Nav III G1000 system interconnect. Figure 1-1. Typical Cessna Nav III G1000 System Interconnect G1000 Nav III Line Maintenance Manual Page 1-7 190-00352-00 Rev. L 1.3.2 Flight Instrumentation The GRS 77 AHRS, GDC 74A Air Data Computer, and GMU 44 Magnetometer are responsible for providing the G1000 system with flight instrumentation. Data consist of aircraft attitude, heading, altitude, airspeed, vertical speed, and outside air temperature information, all displayed on the PFD (data is displayed on the MFD in reversionary mode). Primary data outputs from the GRS and GDC are sent directly to the PFD via ARINC 429. Secondary data paths connect the GRS to the MFD. Additional communications paths connect the GRS and GDC to both GIA units, providing quadruple redundant interface. The GRS 77 receives GPS data from both GIAs, airspeed data from the GDC, and magnetic heading from the GMU. Using these three external sources, combined with internal sensor data, the GRS accurately calculates aircraft attitude and heading. Figure 1-2. G1000 Flight Instrumentation Data Paths Page 1-8 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 1.3.3 Navigation/Communication Systems The GIAs contain VHF COM, VHF NAV, and GPS receivers. COM and NAV audio is sent via digital audio to the GMA 1347 Audio Panel. GPS information is sent to the GRS 77 AHRS and both displays for processing. The GTX 33 Mode S Transponder communicates with both GIAs. Transponder data is sent from the GIAs to the PFD. The #2 GIA outputs analog HSI signals to the KAP 140 autopilot, if equipped. In the case of the GFC 700 both of the GIAs communicate to the servos through RS-485, see Figure 1-1. The GMA 1347 Audio Panel controls audio selections and the display reversionary mode. Figure 1-3. G1000 Navigation/Communication Data Paths G1000 Nav III Line Maintenance Manual Page 1-9 190-00352-00 Rev. L 1.4 User Interface 1.4.1 Control & Operation All control and operation of G1000 equipment as normally used in flight occurs through the PFD, MFD or GMA 1347 audio panel. Figure 1-4 identifies various GDU 104X buttons. See the appropriate G1000 Nav III Cockpit Reference Guide, as well as the appropriate AFMS for more detail on control and operation of the G1000. Figure 1-4. GDU 104X Control Interface 1.4.2 GMA 1347 Control Display Backup Reversionary Button Volume/Squelch Control ICS Isolation Digital Recording Playback Manual Squelch Navigation Radio Audio Navigation Radio Audio Marker Beacon Signal Sensitivity Marker Beacon/Mute Speaker Passenger Address Split COM Transmitters Transceiver Audio Cellular Telephone Figure 1-5. GMA 1347 Control Interface Page 1-10 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 1.4.3 Configuration Mode Operation The configuration mode exists to provide the installer or technician with a means of configuring, checking, and calibrating various G1000 sub-systems. Troubleshooting/diagnostics information can also be derived from this mode. To start the system in Configuration Mode: 1. Press and hold the ENT key on the PFD while applying power. 2. Release the ENT key after ‘INITIALIZING SYSTEM’ appears in the upper left corner of the PFD. 3. Power on the MFD in the same manner. It is best to have both displays in the same mode. NOTE Configuration settings for each G1000 LRU must be adjusted on the PFD. 1.4.4 FMS Cursor The FMS knob is the primary control for the G1000 system. Operation is similar to the Garmin 400/500 Series units. • To cycle through different configuration screens: To change page groups: Rotate the large FMS knob. To change pages in a group: Rotate the small FMS knob. • To activate the cursor for a page, press the small FMS knob directly in, as one would push a regular button. • To cycle the cursor through different data fields, rotate the large FMS knob. • To change the contents of a highlighted data field, rotate the small FMS knob. This action either brings up an options menu for the particular field, or in some cases allows the operator to enter data for the field. • To confirm a selection, press the ENT key. • To cancel a selection, press the small FMS knob. Pressing the small FMS knob again, deactivates the cursor. The CLR key may also be used to cancel a selection or deactivate the cursor. Figure 1-6. FMS Control Knob G1000 Nav III Line Maintenance Manual Page 1-11 190-00352-00 Rev. L 1.4.5 Softkeys Some configuration pages have commands or selections that are activated by the GDU 104X softkeys. If a softkey is associated with a command, that command will be displayed directly above the key. A grayed-out softkey shows a command that is unavailable. A softkey that is highlighted shows the current active selection. Figure 1-7. G1000 Softkeys 1.4.6 Configuration Mode Overview The following diagram shows the layout and organization of various configuration mode page groups and pages. 1. System Status Page 2. Date/Time Setup page 3. Main Lighting Page 4. Audio Alert Configuration Page 5. Software Upload Page 6. Configuration Upload Page 7. System Configuration Page 8. Manifest Configuration Page 1. RS-232 / ARINC 429 Config Page 2. GDU Status Page 3. GDU Test Page 4. Serial/Ethernet I/O Page 5. Alert Configuration Page 6. Airframe Configuration Page 1. RS-232 / ARINC 429 Config Page 2. CAN / RS-485 Configuration Page 3. GIA I/O Configuration Page 4. COM Setup Page 5. GIA Status Page 1. Engine Data Page 2. GEA Status Page 3. GEA Configuration Page 1. RS-232 / ARINC 429 Config Page 2. Transponder Configuration Page 1. AHRS / Air Data Input Page 2. GRS / GMU Calibration Page 1. GDC Configuration Page 1. GDL Page 1. FUEL CALIBRATION Page 2. FUEL TANK CONFIGURATION Page 3. FLAPS AND TRIM CALIBRATION Page 1. GMA Configuration Page 1. GFC Configuration Page 2. GFC STATUS Page Figure 1-8. Configuration Mode Navigation Page 1-12 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 1.4.7 Data Transmission Indicators Several configuration screens utilize indicator light to show data and/or component status. Unless otherwise noted, the following applies to all such indicators: • Green Light: Expected discrete data is successfully received and true, or status is good. • Red Light: Expected discrete data is not received or is invalid, or status is bad. • No Light (Black): No discrete data is expected, or it is received successfully and off, or status is not received or is invalid. 1.4.8 Configuration Page Protection The configuration mode contains pages that display various settings that are critical to aircraft operation and safety. At these pages, the technician is unable to modify or change settings unless they are authorized and equipped to do so. However, most protected pages are viewable to allow technicians greater system awareness for troubleshooting. 1.4.9 G1000 Loader Card Interface The G1000 Loader Card interface exists to provide a means of loading software and configuration files to the system. The G1000 Loader Card uses a 128 MB Secure Digital (SD) data card that contains all necessary files to load software and configuration settings to all G1000 LRUs. Nearly all software and configuration parameters are pre-determined by Garmin and/or Cessna. During removal and replacement of LRUs, software and configuration files may need to be reloaded. To satisfy TC/STC requirements for a specific aircraft, it is critical that the technician use the correct G1000 Loader Card part number. Each Loader Card’s part number defines all files found on the card for a specific G1000 installation. Note that certain configuration settings, such as aircraft registration number (‘N#’) must be entered manually. A sample procedure for loading software and configuration settings can be found in Section 4 of this manual. CAUTION Always use caution when using G1000 Software Loader Cards during maintenance. The G1000 system is designed to immediately initialize the card upon power-up. On-screen prompts must be given careful attention in order to avoid potential loss of data. Always read and thoroughly understand all related information before attempting to use the G1000 Software Loader Cards. G1000 Nav III Line Maintenance Manual Page 1-13 190-00352-00 Rev. L 1.4.10 Configuration Files A G1000 Loader Card typically contains the following configuration files: • AIRFRAME: This file contains data such as airspeed parameters, engine/airframe sensor limitations, fuel tank parameters and alerting system settings that tailor a G1000 PFD or MFD to a specific airframe. • SYSTEM: This file configures the G1000 Ethernet to communicate with a PFD, MFD, and GIAs. • MANIFEST: This file loads a manifest of all software part numbers and versions associated with an approved system configuration. • MFD1: This file configures the MFD serial/discrete communications and alerting system settings. • PFD1: This file configures the PFD serial/discrete communications and alerting system settings. • GIA1/GIA2: These files configure GIA1 and GIA 2 serial/discrete communications settings. • GMA1: This file configures the GMA 1347 audio and serial communications settings. • GTX1: This file configures the GTX transponder and serial communications settings. • GEA1: This file configures GEA 71 engine/airframe parameters. • GDC1: This file configures the GDC 74A air data values. • GDL69: This file configures the GDL 69A serial communications settings • CALIBRATION: This file configures calibration values for various analog sensors connected to the GEA (fuel quantity, fuel flow, etc.) • AUDIO: This file configures all of the audio messages for the G1000 system. This includes both tones and voice messages that are utilized for alerts, cautions, and warnings. The above files are loaded during the configuration process. Each file is sent directly to the applicable LRU. The same file is also stored into PFD internal configuration memory and configuration module. If the PFD is replaced, the configuration module retains all configuration files in the aircraft. NOTE The GRS 77 AHRS and GMU 44 Magnetometer do not utilize a configuration file. However, these LRUs do require several calibrations during installation and/or maintenance. Page 1-14 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 1.4.11 Configuration File Retention The G1000 system is designed to store all configuration settings in various places so that the configuration of the system is retained in the aircraft during maintenance. Since the G1000 Integrated Flight Deck is installed in a variety of aircraft, it is imperative that aircraft-specific data be retained at the aircraft level. Figures 1-9 and 1-10 show a block diagram of how a typical G1000 system stores configuration settings. Figure 1-9. G1000 Configuration Storage G1000 Nav III Line Maintenance Manual Page 1-15 190-00352-00 Rev. L The GRS 77 and GDC 74A configuration modules function differently than the rest of the system. The GDC 74A’s configuration file is loaded directly to GDC internal memory, a copy is also stored in the GDC configuration module. The GRS 77 configuration module stores calibration data recorded during installation calibration procedures, and does not store configuration settings. GRS 77 AHRS GRS 77 Config Module (Located in GRS backshell connector) Stores a copy of AHRS/Magnetometer calibration values that are recorded upon completion of post-installation calibration procedures. The GRS 77 stores calibration data internally. The GRS 77 also stores factory calibration data internally. Should internal memory or the configuration module fail, AHRS ouput data flags invalid. GRS Internal Memory Contains internal sensor calibration data that is not installation-specific. Data is stored from factory calibrations. GDC 74A Air Data Computer GDC 74A Config Module (Located in GDC backshell connector) Stores a copy of the GDC 74A configuration file. The GDC 74A stores the GDC1 configuration file internally. The GDC 74A also stores factory calibration data internally. Should internal memory or the configuration module fail, loss of some or all airdata outputs will result. GDC Internal Memory Contains internal sensor calibration data that is not installation-specific. Data is stored from factory calibrations. Figure 1-10. GRS/GDC Configuration Storage 1.4.12 SET>ACTV / ACTV>SET Throughout various configuration mode pages, there are SET and ACTIVE columns for input/output settings and other parameters. SET: Refers to a setting or group of settings that reside in the PFD’s internal memory and/or master configuration module (See Figure 1-11). ACTIVE: Refers to a current setting stored and used in a LRU. LRUs store the ‘active’ settings within internal memory. Data can be manually copied from one column to the other by using the following two softkeys: • SET>ACTV (read ‘Set to Active’) softkey: Allows the installer to send the information in the SET column (data stored in the master configuration module) to the ACTV column (data used by LRU). • ACTV>SET (read ‘Active to Set’) softkey: Causes the LRUs current settings to be copied to the master configuration module as SET items. In the first example shown in Figure 1-11, the SET columns do not match the ACTIVE columns. The inequality between SET and ACTIVE indicates a configuration mismatch. By pressing the SET>ACTV softkey, this copies the SET column to the LRU unit’s configuration memory. The settings then become the ACTIVE settings for the LRU being configured. Page 1-16 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 1.4.13 ACTV>SET Interface The only time ACTV>SET should be used is when the master configuration module fails and must be replaced. In this circumstance the ACTV>SET softkey may be used to reload correct configuration settings from previously installed LRUs. Should a LRU be replaced along with the master configuration module, the LRU needs to be reconfigured using the G1000 SW Loader Card. WARNING The ACTV>SET softkey must be used with caution! If an improperly configured unit is installed, this softkey causes the wrong configuration to replace the correct aircraft configuration! = = Master Configuration Module LRU Memory Master Configuration Module LRU Memory Master Configuration Module LRU Memory = Master Configuration Module LRU Memory = Configuration Mismatch SET>ACTV Softkey Configuration Correct Figure 1-11. SET/ACTV Feature In most cases, when a setting is changed, the newer setting will automatically be transferred to the appropriate LRU. The technician receives on-screen confirmation that the configuration is successful, as depicted in Figure 1-12. Likewise, if a configuration error is detected, it too is shown in similar fashion. Figure 1-12. Configuration Status G1000 Nav III Line Maintenance Manual Page 1-17 190-00352-00 Rev. L 1.5 Recommended Tools The following tools are needed to perform various maintenance tasks on G1000 equipment: • Voltmeter capable of measuring 0-32 Volts DC • #2 Phillips Screwdriver • 3/32nd inch Hex Tool • Digital Level with 0.25 degrees of accuracy capability • VHF NAV/COM/ILS ramp tester • Transponder ramp tester including Mode S capability for Mode S transponder equipped aircraft • Air Data Test Set (ADTS) capable of simulating altitude up to the aircraft’s service ceiling • GPS indoor repeater (if outside GPS signals cannot be acquired) • Headset/Microphone Page 1-18 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 Blank Page G1000 Nav III Line Maintenance Manual Page 2-1 190-00352-00 Rev. L 2 TROUBLESHOOTING Begin troubleshooting by determining the specific failure. Follow guidance for the appropriate LRU provided in this section. Reference applicable aircraft manufacturer provided wiring diagrams as an aid in troubleshooting. NOTE See Section 3 for instructions on removing and replacing. Once an LRU is replaced, a software update and configuration may be required. See Section 4 for instructions on configuration and uploading software. NOTE If PFD1, MFD1, GIA1 or GIA2 configuration files are loaded during troubleshooting, any optional equipment files for equipment installed in the aircraft must also be loaded. Failure to reload the optional configuration files may deactivate the equipment. Be sure to note any optional equipment installed (by pre-inspection or by logbook entry) before loading PFD/MFD and/or GIA 1/2 configuration files. 2.1 G1000 Alerting System 2.1.1 System Annunciations A red X through a display field; such as Com frequencies, Nav frequencies, or engine data, indicates that display field is not receiving valid data. Figure 2-1 shows display fields that are not receiving valid data and their associated LRUs. See Section 2.1.1.1 for information on troubleshooting system annunciations. No. 1 GIA 63 No. 2 GIA 63 No. 1 GIA 63 No. 2 GIA 63 Attitude: GRS 77 AHRS Heading: GRS 77 or GMU 44 GDC 74A Air Data Computer GTP 59 OAT Probe or GDC 74A ADC GTX 33 Transponder or #1 & 2 GIA 63 GIA 63 No. 1, 2 No. 1 & 2 GIA 63 or GEA 71 or Equivalent Engine/Airframe Sensors Figure 2-1. Red X’d Display Fields Page 2-2 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 2.1.1.1 System Annunciation Troubleshooting Annunciation Associated LRU Solution NAV1 or COM1 GIA1 • Check configuration settings for GIA1 and the PFD • Check Ethernet interconnect from GIA1 to the PFD • Switch GIA1 and GIA2, to verify location of problem: o If problem follows GIA1, replace GIA1. o If problem persists, replace PFD. NAV2 or COM2 GIA2 • Check configuration settings for GIA2 and the MFD • Check Ethernet interconnect from GIA2 to the MFD • Switch GIA1 and GIA2, to verify location of problem: o If problem follows GIA2, replace the GIA2. o If problem persists, replace MFD. GPS INTEG or Time GIA1 or 2 • Ensure that a cell phone or a device using cell phone technology is not turned on (even in a monitoring state) in the cabin. • Check GPS1 and GPS2 signal strength on AUX page 3 • Check corresponding GPS antenna and cable • Check Ethernet interconnect between the PFD and GIA1 or MFD and GIA2 for faults. • Switch GIA1 and GIA2, to verify location of problem: o If problem follows the GIA, replace the GIA. o If problem persists, replace the MFD or PFD. XPDR FAIL GTX 33 • Check GTX 33 configuration settings for GIA1 and GIA2 • Perform a SET>ACTV configuration reset on the GTX Config page, and verify the aircraft registration is present. • Replace the GTX 33 TAS, AIRSPEED FAIL, ALTITUDE FAIL, VERT SPEED FAIL GDC 74A • Inspect GDC 74A pitot/static plumbing integrity. • Inspect pitot/static ports and associated equipment. • For TAS failure, also check GTP 59 probe. • Check GDC 74A configuration settings for the PFD, MFD, GIA1, and GIA2 o If PFD, MFD, and GIA configuration settings are correct, replace the GDC configuration module. o If problem persists, replace the GDC 74A OAT and TAS GTP 59 • Check OAT probe wiring and connectors for faults. • Check GDC config module wiring for damage, replace if any is found. • Replace GDC config module • Replace GDC 74A with a known good unit: o If problem persists, replace the GTP 59. G1000 Nav III Line Maintenance Manual Page 2-3 190-00352-00 Rev. L Annunciation Associated LRU Solution ATTITUDE FAIL GRS 77 • Ensure that a cell phone or a device using cell phone technology is not turned on (even in a monitoring state) in the cabin. • Cycle GRS 77 power to restart initialization. • Ensure GRS 77 connecter is secure and proper wire harness strain relief is provided. • Ensure the GRS 77 is fastened down tightly in it’s mounting rack and that the mounting rack is not loose (CAUTION - do not loosen the mounting rack hardware to the airframe shelf or the aircraft will need to be re-leveled and the PITCH/ROLL OFFSET procedure performed). • Ensure aircraft battery is mounted securely if located near the GRS 77. • Ensure GPS has acquired at least four satellites, has a 3D navigation solution, and a DOP of less than 5.0. This is particularly important for an ATTITUDE FAIL that appears during ground operation only. • Perform an Engine Run-Up Test to check if engine vibration is causing the GRS 77 to go offline. • Load configuration files to the PFD, MFD, GIA1, and GIA2. • Calibrate the GRS 77 (Pitch/Roll Offset and Magnetometer Calibration). • Replace GRS 77. o If problem persists replace GRS 77 configuration module. See Section 3.4 for configuration instructions. • Contact Garmin Aviation Product Support if condition continues after replacing the GRS 77 and config module for additional assistance. Page 2-4 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 Annunciation Associated LRU Solution HDG FAIL GRS 77 & GMU 44 • Ensure metal objects (tool boxes, power carts, etc.) are not interfering with the magnetometer and aircraft is not in hangar, near other buildings, parked over metal drainage culverts or on hard surfaces that may contain steel reinforcements • Ensure that a cell phone or a device using cell phone technology is not turned on (even in a monitoring state) in the cabin. • Cycle power after moving aircraft away from metal objects to determine if metal objects were the source of the interference. Allow up to five minutes for the heading to reinitialize. • Perform a Magnetometer Interference Test to check for interference from onboard electrical system components (e.g. NAV lights). Pay particular attention to any new electrical devices that have been installed since the aircraft was new. Correct any discrepancies that do not allow this test to pass before continuing. • Ensure GRS 77 and GMU 44 connectors are secure. • Check the wiring and any inline connectors between the GRS and GMU for faults. • Recalibrate the GMU 44, see Section 4.4.5..2. • Load configuration files to the PFD, MFD, GIA1, and GIA2 o If problem persists replace the GMU 44. o If problem persists, replace the GRS 77. G1000 Nav III Line Maintenance Manual Page 2-5 190-00352-00 Rev. L Annunciation Associated LRU Solution Engine/Airframe Sensors GEA 71 • Check for GEA related Alert messages on the PFD. Correct any Alerts concerning software or configuration errors by reloading software or configuration as noted. • Verify GEA internal power supply, configuration, and calibration status in configuration mode. o Configuration and calibration boxes should be green. If they are red, replace the GEA 71. o With GDU software version 4.00 or higher, the INT PWR SUPPLY box should be green. If it is red, check for a shorted airframe sensor (reference Cessna wiring schematics for your aircraft type) by unplugging airframe sensors that receive power from the GEA one at a time until the INT PWR SUPPLY box turns green. The last sensor that was unplugged before the box turned green is the cause of the problem. Replace that sensor (reference Cessna Aircraft Maintenance Manual for instructions). Systems with GDU software versions less than 4.00 will display a red box, indicating proper operation. Troubleshoot in the same manner as for GDU software above 4.00 except the box color will behave oppositely. • Verify internal, external, and reference voltages listed in the Main Analog and I/O A Analog boxes are not dashed out (does not include Aircraft Power 1 and 2). Reference Section 2.7.1.2. o If any voltages are dashed out, replace the GEA. • Ensure the GEA is online (green checkmark on the AUX – SYSTEM STATUS page). o If GEA is not online verify unit is receiving power at the rack connector. o Check the GIA/GEA interconnects for faults. o Reload configuration files to both GIA’s and the GEA. o If problem persists, replace the GEA 71. • For only Red-X of the EGT and CHT temperature readings, replace the GEA configuration module and backshell thermocouple. o If problem persists, replace the GEA 71. Page 2-6 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 2.1.2 Messages & Annunciations Figure 2-2. Alerts & Annunciations In normal mode, the G1000 system presents a variety of system messages and/or annunciations to the operator and technician. System messages are normally presented on the PFD and can be viewed by pressing the ALERTS softkey. This section provides a listing of possible messages, alerts, and annunciations. Aircraft specific alerts are not covered in this manual. 2.1.3 System Status Page (MFD Normal Mode) Figure 2-3. System Status Page (AUX Group) The AUX – SYSTEM STATUS page on the MFD provides LRU health status when in normal mode. G1000 Nav III Line Maintenance Manual Page 2-7 190-00352-00 Rev. L 2.1.4 AFCS System Troubleshooting The information in this section specifically relates to the GFC 700. Should a problem be encountered during the operation of the GFC 700, the pilot and technician should first evaluate the overall status and condition of the G1000 system on the AUX – System Status page (on the MFD). Any alert messages, annunciations, or other abnormal behaviors should be noted in an effort to pinpoint the fault. More detailed system troubleshooting for a red AFCS or red PFT annunciator is contained in Section 2.11. 2.1.4.1 Annunciations and Alerts The GFC 700 AFCS Annunciation field is located above the airspeed tape on the PFD as shown in Figure 2-4. Figure 2-4. AFCS Annuciation Field Page 2-8 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 The following annunciations may appear in the AFCS Annunciation field: Annunciation Condition Solutions AFCS System Failure • Ensure that the G1000 system is in proper working order. Check specifically for proper operation of the: • GIA 63W Integrated Avionics Unit • GRS 77 AHRS • GDC 74A Air Data Computer • All GSA 81 Servos • Check that no red X’s are present on the MFD and PFDs. • Check that there are no Alert messages present in the PFD Alert window. Correct any software or configuration errors noted. • Go to the AUX SYSTEM STATUS page on the MFD and verify that all LRUs have a ‘green’ check. • If the OAT and TAS is Red-X’d and the attitude indication is present, replace the GDC74 config module. o If the condition is still present, replace the config module wiring harness. • See Section 2.11 for further troubleshooting. Pitch Axis Failure Pitch Trim Axis Failure Roll Axis Failure • Check the AUX – SYSTEM STATUS page to see if the servo is online (green check). • Check that the affected servo is receiving power. • Check the servo wiring and connector. • Ensure PTRM switches are not stuck. • If failure condition still exists, remove and replace the affected servo. Elevator Mistrim Down Elevator Mis-Trim Up • If mistrim annunciations persist, check the Pitch Trim servo for proper operation. Verify that the servo is online at the AUX – SYSTEM STATUS page. • Check the Pitch Trim servo wiring and connector. Ensure the servo is receiving power. • Check the aircraft trim control rigging. • If mistrim condition still exists, remove and replace the affected servo. Aileron Mistrim Right Aileron Mistrim Left • Check for possible fuel imbalance. • Check aileron control rigging. • If mistrim condition still exists remove and replace the roll servo. Pre-Flight Test • Reset servo power by cycling the circuit breaker. • See Section 2.11 for further troubleshooting. G1000 Nav III Line Maintenance Manual Page 2-9 190-00352-00 Rev. L 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. NOTE 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. Garmin recommends following the 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. Page 2-10 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 2.1.5.1 PFD RS-232 / ARINC 429 CONFIG Page PFD1 ARINC 429 Channel LRU Indicator Status PFD1/GRS 77 data path is functioning correctly PFD1/GRS 77 data path is not functioning correctly • Configure PFD1 • Configure GRS 77 • Check the PFD1/GRS 77 interconnect wiring for faults • Swap the PFD with the MFD to confirm if the problem is in the original PFD. o Replace original PFD if box turns green after swapping displays. o Replace GRS 77 if problem remains. IN 1 GRS 77 #1 PFD1/GRS 77 data path functionality is unknown. Reload PFD configuration file. PFD1/GDC 74 data path is functioning correctly PFD1/GDC 74 data path is not functioning correctly • Reconfigure PFD1. • Reconfigure GDC 74A. • Check the PFD1/GDC 74 interconnect wiring for faults. • Swap the PFD with the MFD to confirm if the problem is in the original PFD. o Replace original PFD if box turns green after swapping displays. o Replace GDC 74A if problem remains. IN 2 GDC 74 #1 PFD1/GDC 74 data path functionality is unknown. Reload PFD configuration file. G1000 Nav III Line Maintenance Manual Page 2-11 190-00352-00 Rev. L 2.1.5.2 PFD RS-232 / ARINC 429 CONFIG Page MFD1 ARINC 429 Config Channel LRU Indicator Status MFD1/GRS 77 data path is functioning correctly. MFD1/GRS 77 data path is not functioning correctly. • Reconfigure MFD1. • Reconfigure GRS 77. • Check the MFD1/GRS 77 interconnect wiring for faults. • Swap the MFD with the PFD to confirm if the problem is in the original MFD. o Replace original MFD if box turns green after swapping displays. o Replace GRS 77 if problem remains. IN 1 GRS 77 #1 MFD1/GRS 77 data path functionality is unknown. Reload MFD configuration file. MFD1/GDC 74 data path is functioning correctly. MFD1/GDC 74 data path is not functioning correctly. • Reconfigure MFD1. • Reconfigure GDC 74A. • Check the MFD1/GDC 74 interconnect wiring for faults. • Swap the MFD with the PFD to confirm if the problem is in the original MFD. o Replace original MFD if box turns green after swapping displays. o Replace GDC 74A if problem remains. IN 2 GDC 74 #1 MFD1/GDC 74 data path functionality is unknown. Reload MFD configuration file. Page 2-12 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 2.1.5.3 GIA RS-232 / ARINC 429 CONFIG Page GIA1 RS-232 Channel LRU Indicator Status GIA1/GDC 74A #1 data path is functioning correctly GIA1/GDC 74A #1 data path is not functioning correctly. • Reconfigure GIA1. • Reconfigure GDC 74A. • Check the GIA1/GDC 74A interconnect wiring for faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Replace GDC 74A if problem remains. CHNL 1 GDC 74 #1 GIA1/GDC 74 data path functionality is unknown. Reload GIA1 configuration file. GIA1/GTX 33 data path is functioning correctly GIA1/GTX 33 data path is not functioning correctly • Reconfigure GIA1. • Reconfigure GTX 33. • Check the GIA1/GTX 33 interconnect wiring for faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. • Replace GTX 33 if problem remains. CHNL 5 GTX 33 #1 w/TIS GIA1/GTX 33 data path functionality is unknown. Reload GIA1 configuration file. GIA1/GRS 77 data path is functioning correctly GIA1/GRS 77 data path is not functioning correctly. • Reconfigure GIA1. • Reconfigure GRS 77. • Check the GIA1/GRS 77 interconnect for wiring faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Replace GRS 77 if problem remains. CHNL 6 GRS 77 #1 GIA1/GRS 77 data path functionality is unknown. Reload GIA1 configuration file. G1000 Nav III Line Maintenance Manual Page 2-13 190-00352-00 Rev. L Channel LRU Indicator Status GIA1/GMA 1347 data path is functioning correctly GIA1/GMA 1347 data path is not functioning correctly • Reconfigure GIA1. • Reconfigure GMA 1347. • Check the GIA1/GMA 1347 interconnect for wiring faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Replace GMA 1347 if problem remains. CHNL 7 GMA 1347 #1 GIA1/GMA 1347 data path functionality is unknown. Reload GIA1 configuration file. GIA1 ARINC 429 Channel LRU Indicator Status GIA1/GDC 74A data path is functioning correctly. GIA1/GDC 74A data path is not functioning correctly. • Reconfigure GIA1. • Reconfigure GDC 74A. • Check the GIA1/GDC 74A interconnect for wiring faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Replace GDC 74A if problem remains. IN 5 GDC 74 #1 GIA1/GDC 74A data path functionality is unknown. Reload GIA1 configuration file. GIA1/GRS 77 data path is functioning correctly. GIA1/GRS 77 data path is not functioning correctly. • Reconfigure GIA1. • Reconfigure GRS 77. • Check the GIA1/ GRS 77 interconnect for wiring faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Replace GRS 77 if problem remains. IN 6 GRS 77 #1 GIA1/GRS 77 data path functionality is unknown. Reload GIA1 configuration file. Page 2-14 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 GIA2 RS-232 Channel LRU Indicator Status GIA2/WX-500 data path is functioning correctly. GIA1/WX-500 data path is not functioning correctly. • Reconfigure GIA2. • Check the GIA1/ WX500 interconnect for wiring faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Replace WX500 if problem remains. CHNL 3 WX-500 GIA2/WX-500 data path functionality is unknown. Reload GIA2 configuration file. GIA2/CO GUARDIAN data path is functioning correctly. CHNL 4 CO GUARDIAN GIA2/CO GUARDIANdata path is not functioning correctly. • Reconfigure CO GUARDIAN Option • Check the GIA2/CO GUARDIAN interconnect for wiring faults • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. Replace CO GUARDIAN if problem persists. GIA2/ CO GUARDIAN data path functionality is unknown. Reload GIA2 configuration file. GIA2/GTX 33 data path is functioning correctly. GIA2/GTX 33 data path is not functioning correctly. • Reconfigure GIA2. • Reconfigure GTX 33. • Check the GIA2/GTX 33 interconnect for wiring faults • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Replace GTX 33 if problem persists. CHNL 5 GTX 33 #1 w/TIS GIA2/GTX 33 #1 data path functionality is unknown. Reload GIA2 configuration file. CHNL 7 GMA 1347 #1 GIA2/GMA 1347 #1 data path is functioning correctly. G1000 Nav III Line Maintenance Manual Page 2-15 190-00352-00 Rev. L GIA2/GMA 1347 #1 data path is not functioning correctly. • Reconfigure GIA2. • Reconfigure GMA 1347. • Check the GIA2/GMA 1347 interconnect wiring for faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Replace GMA 1347 if problem persists. GIA1/GMA 1347 data path functionality is unknown. Reload GIA2 configuration file. Page 2-16 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 GIA2 ARINC 429 Channel LRU Indicator Status GIA2/GDC 74 data path is functioning correctly. GIA2/GDC 74 data path is not functioning correctly. • Reconfigure GIA2. • Reconfigure GDC 74. • Check the GIA2/GDC 74 interconnect for wiring faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Replace GDC 74 if problem persists. IN 5 GDC 74 #1 GIA2/GDC 74 #1 data path functionality is unknown. Reload GIA2 configuration file. GIA2/GRS 77 data path is functioning correctly. GIA2/GRS 77 data path is not functioning correctly. • Reconfigure GIA2. • Reconfigure GRS 77. • Check the GIA2/GRS 77 interconnect for wiring faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Replace GRS 77 if problem persists. IN 6 GRS 77 #1 GIA2/GRS 77 data path functionality is unknown. Reload GIA2 configuration file. G1000 Nav III Line Maintenance Manual Page 2-17 190-00352-00 Rev. L 2.1.5.4 GIA CAN / RS-485 CONFIGURATION Page GIA1 RS-485 Channel LRU Indicator Status GIA1/GEA data path is functioning correctly. GIA1/GEA data path is not functioning correctly. • Reconfigure GIA1. • Reconfigure GEA. • Check the GIA1/GEA interconnect for wiring faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Replace GEA if problem persists. CHNL 1 GEA1 GIA1/GEA data path functionality is unknown. Reload GIA1 configuration file. GIA1/GFC 700 data path is functioning correctly. GIA1/GFC 700 data path is not functioning correctly. • Reconfigure GIA1. • Reload GFC 700 Installation configuration files (if equipped). • Check the GIA1/GSA servo interconnects for wiring faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Troubleshoot GSA servos to determine which one is causing the problem (ref section 2.10). CHNL 4 GFC 700 GIA1/GFC 700 data path functionality is unknown. Reload GFC 700 Installation configuration files (if equipped). Page 2-18 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 GIA2 RS-485 Channel LRU Indicator Status GIA2/GEA data path is functioning correctly. GIA2/GEA data path is not functioning correctly. • Reconfigure GIA2. • Reconfigure GEA. • Check the GIA2/GEA interconnect for wiring faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Replace GEA if problem persists. CHNL 1 GEA1 GIA2/GEA data path functionality is unknown. Reload GIA2 configuration file. GIA2/GFC 700 data path is functioning correctly. GIA2/GFC 700 data path is not functioning correctly. • Reconfigure GIA2. • Reload GFC 700 Installation configuration files (if equipped). • Check the GIA2/GSA servo interconnects for wiring faults. • Swap the GIA’s to confirm if the problem is in the original GIA. o Replace original GIA if box turns green after swapping units. o Troubleshoot GSA servos to determine which one is causing the problem (ref section 2.10). CHNL 4 GFC 700 GIA2/GFC 700 data path functionality is unknown. Reload GFC 700 Installation configuration files (if equipped). G1000 Nav III Line Maintenance Manual Page 2-19 190-00352-00 Rev. L 2.2 GDU 104X 2.2.1 Configuration Pages 2.2.1.1 RS-232/ARINC 429 CONFIG Page Figure 2-5. RS-232/ARINC 429 CONFIG Page Main ARINC 429 and RS-232 communications channels for the MFD and PFD(s) are shown at this page. All settings are pre-established for a particular installation and are loaded from the G1000 Loader Card. The ‘MFD 1’ and ‘PFD 1’ configuration files contain the settings shown at this page. If the ACTIVE column does not match the SET column, reload PFD/MFD configuration files from the loader card. SELECT UNIT This window shows the currently selected GDU display. RS-232 This window shows active RS-232 configuration settings for currently selected display. ARINC 429 This window shows active ARINC 429 configuration settings for currently selected display. Page 2-20 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 2.2.1.2 GDU STATUS Page Figure 2-6. GDU STATUS Page This page shows various items related to the GDU 104X display and its operation. The technician can use this page to aid in the diagnosis and troubleshooting of the GDU 104X. STATUS RAM: Indicates condition of GDU 104X RAM memory. If it does not pass the unit may not initialize. XILINX: Indicates condition of GDU 104X XILINX processor. If it does not pass the unit may not initialize. BASE MAP: Indicates condition of stored basemap in the GDU 104X. A green box indicates the basemap has been installed. If the box is black, the basemap will need to be loaded. Contact Garmin for assistance. ETHERNET 1, 2, 3: Indicates status of the GDU 104Xs Ethernet channel. A green box indicates the ETHERNET loopback tests passed. A red or black box indicates it may not be used or a wiring fault is present. RS-232 1, 2: Indicates status of the GDU 104X’s RS-232 channel. A green box indicates the RS-232 loopback tests passed. A red or black box indicates it may not be used or a wiring fault is present. IRDA: Indicates status of GDU 104X IrDA infrared port. Used for Garmin testing, it is not activated at this time ETHERNET 4: Indicates status of GDU 104Xs Ethernet channel 4. Used for Garmin testing, it is not activated at this time ANALOG PHOTOCELL A, B: Shows the input value of display photocells, between 0 and 9999. The values can be converted to a percentage by adding a decimal place two digits over from the right (Example: 8035 = 80.35%). If there is a significant split (~30% to 50%) you can expect the display to appear different from the other display in the aircraft, IF both of their lighting curves are set to the same values. Replace the display if one photocell reading is significantly different from the other. BEZEL THERM: Shows the temperature of the GDU bezel, expressed in degrees Celsius. (Example: 2064 = 20.64 degrees Celsius) CCFT CRNT 1, 2: Shows an indication of current flowing through the display backlight bulbs. Number does not reflect actual current value and is not useful for troubleshooting. G1000 Nav III Line Maintenance Manual Page 2-21 190-00352-00 Rev. L LGHT BUS AC: Shows the input value of the AC lighting bus, if enabled. Disregard number if it is not used in the installation. LGHT BUS DC: Shows the input value of the DC lighting bus, if enabled. Disregard number if not used in the installation. POWER (1.3V, 2.5V, 3.3V, 28 V 1/2): Shows power input voltages of various internal components. Should be within 10% of the desired voltage. (Example: for 2.5V field, 2500 = 2.500 Vdc; for 28V Field, 3633 = 36.33 Vdc). Replace the display if these values are more than 10% from the desired voltage. INTRNL TEMP 1, 2: Shows the internal temperature sensor values of the display, in degrees Celsius. (Example: 45267 = 45.267°C) DISCRETE SYS ID 1, 2, 3: Shows the current system ID assigned to the display. Green indicates that the System ID pin is strapped to ground. Black indicates that the System ID pin is left ‘open’ and not strapped to ground. PFD #2 is not used in SEP aircraft. GDU System ID 1 GDU System ID 2 GDU System ID 3 Display Mode Black Black Green MFD Black Black Black PFD #1 Green Black Black PFD #2 RVRSNRY MODE 1, 2: Shows the current status of the reversionary modes. Reversionary Mode 1 is activated by the GMA 1347 reversion button. Reversionary Mode 2 is activated by a second GMA 1347, if installed. Reversionary 1 input is a ground on Pin 58, reversionary 2 input is a ground on Pin 15. SPARE INPUT: A green box indicates Pin 14 is grounded. This input should have a black box, if it is green check for connector miswiring or a bent pin. TEST/DEMO MODE SLCT: A green box indicates Pin 53/54 is grounded. These inputs should have a black box, if either box is green check for connector miswiring or a bent pin. PULSE PER SEC 1, 2: Shows status of GPS time synchronization inputs (from GIA) to the GDU. Used for Garmin testing, not useful for troubleshooting. DISCRETE IN CONFIGURATION The Discrete In field shows the current configuration of discrete inputs into the display. These settings are loaded with the G1000 Loader Card and must not be changed. The input box is green if it is receiving the input, black if no input is expected, or red for a missing input. If the active column does not match the set column, load PFD/MFD configuration files. These settings are loaded with the G1000 Loader Card and must not be changed. Page 2-22 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 2.2.1.3 GDU TEST Page Figure 2-7. GDU TEST Page The Test Page depicts a graphical layout of all buttons on the display in red. Each red graphical button turns green when the corresponding button is pressed, indicating that the button operates correctly. The Test Page also provides the following information regarding the display and associated systems. DISPLAY DUTY PWM 1: Shows the display brightness duty pulse width modulation. Value range is between 0 and 9999 and corresponds to the display brightness value shown. Not useful for troubleshooting. CRNT PWM: Shows percentage of current pulse-width-modulation to backlight bulbs. Value is between 0 and 10,000, showing the percentage of the maximum allowable current to the backlight. Not useful for troubleshooting. TOGGLE PWM TO MANL?: Allows the technician to manually adjust the display brightness. TOGGLE CCFT OFF?: Allows the technician to turn off the backlight current controller. KEY KEY PWM: Shows the keypad pulse width modulation brightness value. Range is between 0 and 9999 and corresponds to the keypad brightness value shown. Not useful for troubleshooting. TOGGLE KEY BKLT OFF?: Allows the technician to toggle the keyboard backlight off. REINIT PAGE INFO?: Allows technician to re-initialize all information on the test page. G1000 Nav III Line Maintenance Manual Page 2-23 190-00352-00 Rev. L ADC PHOTOCELL A, B: Shows the input value of display photocells, between 0 and 9999. The values can be converted to a percentage by adding a decimal place two digits over from the right (Example: 8035 = 80.35%). If there is a significant split (~30% to 50%) you can expect the display to appear different from the other display in the aircraft, IF both of their lighting curves are set to the same values. Replace the display if one photocell reading is significantly different from the other. BEZEL THERM: Shows the temperature of the GDU bezel, expressed in degrees Celsius. CCFT CRNT 1, 2: Shows an indication of current flowing through the display backlight bulbs. Number does not reflect actual current value and is not useful for troubleshooting. POWER (2.5V, 3.3V, 28 V 1, 2; 1.3V): Shows power input voltages of various internal components. (Example: for 2.5V field, 2500 = 2.500 Vdc; for 28V Field, 3633 = 36.33 Vdc) They need to be within 10% of desired voltages. Replace the display if these values are more than 10% from the desired voltage. LGHT BUS DC, AC: Shows input value of AC and DC lighting bus inputs, depending on which is configured. Disregard number if not used in the installation. INTRNL TEMP 1, 2: Shows the internal temperature of the GDU, expressed in degrees Celsius. TEST IIC EEPROM: Shows the condition of the GDU configuration module EEPROM chip, located in the backshell connector. It should be green for the PFD and red for the MFD. If it is red on the PFD, check configuration module wiring and pins for damage before replacing the configuration module. DATACARD CHKSUM 1, 2: Requires the use of a special datacard. Tests the datacard reader interface function. Used for Garmin testing, not useful for troubleshooting. NAND, NOR FLASH, SDRAM: Shows the condition of various GDU internal components. A429 LOOP 1, 2: Indicated the status of the GDU 104Xs ARINC 429 channels. A green box indicates the ARINC 429 loopback tests passed. A red or black box indicated it may not be used or a wiring fault is present. ETHERNET 1, 2, 3: Indicates status of the GDU 104Xs Ethernet channel. A green box indicates the ETHERNET loopback tests passed. A red or black box indicates it may not be used or a wiring fault is present. RS-232 1, 2: Indicates status of the GDU 104X’s RS-232 channel. A green box indicates the RS-232 loopback tests passed. A red or black box indicates it may not be used or a wiring fault is present. IRDA: Indicates status of GDU 104X IrDA infrared port. Used for Garmin testing, it is not activated at this time. BKUP CAPS: Indicates status of the Backup Capacitor Test. A green box indicates the test passed, a red box indicates it failed. Page 2-24 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 DISCRETE RVRSNRY MODE 1, 2: Shows the current status of the reversionary modes. Reversionary Mode 1 is activated by the GMA 1347 reversion button. Reversionary Mode 2 is activated by a second GMA 1347, if installed. Reversionary 1 input is a ground on Pin 58, reversionary 2 input is a ground on Pin 15. PULSE PER SEC 1, 2: Shows status of GPS time synchronization inputs (from GIA 63/GIA 63W) to the GDU. Used for Garmin testing, not useful for troubleshooting. TEST, DEMO MODE SELECT: A green box indicates Pin 53/54 is grounded. These inputs should have a black box, if either box is green check for connector miswiring or a bent pin. FPGA: Shows the condition of the GDU FPGA processor. If it does not pass the unit may not initialize. SYS ID 1, 2, 3: Shows the current system ID assigned to the display. Green indicates that the System ID pin is strapped to ground. Black indicates that the System ID pin is left ‘open’ and not strapped to ground. (See Table below) PFD #2 is not used in SEP aircraft. GDU System ID 1 GDU System ID 2 GDU System ID 3 Display Mode Black Black Green MFD Black Black Black PFD #1 Green Black Black PFD #2 REMOTE OFF: Allows the display to control power of a remote system. Not used in any installation at this time. G1000 Nav III Line Maintenance Manual Page 2-25 190-00352-00 Rev. L 2.2.1.4 DIAGNOSTICS Page Figure 2-8. DIAGNOSTICS Page The DIAGNOSTICS Page is a “display only” page, this page is protected and cannot be changed. Page 2-26 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 2.2.1.5 SERIAL/ETHERNET I/O Page Figure 2-9. SERIAL/ETHERNET I/O Page The SERIAL/ETHERNET I/O Page displays Ethernet communication statistics. If Ethernet communication issues are suspected, this pages displays errors being logged as they occur. A couple of errors are generally not cause for unit rejection. If there are a substantial, growing number of errors logged, it indicates an Ethernet communication issue. Use the FMS knob to check all three Ethernet ports. Generally you should see a continually increasing number in the RCV GOOD FRAMES and XMT GOOD FRAMES to show Ethernet communications are ok. This page is protected and cannot be changed. If the number of errors are continually increasing, check Ethernet wiring between GDU’s and GIA’s for any disconnects. If none are found, troubleshoot which LRU (PFD, MFD, GIA 1, GIA2, or GDL) is causing the problem. G1000 Nav III Line Maintenance Manual Page 2-27 190-00352-00 Rev. L 2.2.1.6 ALERT CONFIGURATION Page Figure 2-10. ALERT CONFIGURATION Page The ALERT CONFIGURATION Page displays all available alerts and what triggers them. This page is protected and cannot be changed. 2.2.1.7 AIRFRAME CONFIGURATION Page Figure 2-11. AIRFRAME CONFIGURATION Page The AIRFRAME CONFIGURATION Page displays the airframe configuration parameters for instruments, airspeed bugs, and other items. This page is protected and cannot be changed. Page 2-28 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 2.2.2 Common Problems Symptom Recommended Action Display is blank Display resets Display flickers • Ensure that a cell phone or a device using cell phone technology is not turned on (even in a monitoring state) in the cabin. • Cycle power. o If GDU recovers, observe display for yellow text containing error information at the top of the screen. If message indicates software need to be re-loaded, then re-load software. Otherwise, replace the GDU. • Use a bright light to verify LCD is active. o Adjust avionics dimmer control full clockwise. o Manually turn up backlight on the PFD and load configuration files to the PFD and MFD. • Ensure slide lock is fully engaged with the locking tabs on the back of the unit. o If slide lock is not fully engaged, remove connector and verify the locking tabs on the GDU are perpendicular to the connector. If necessary, straighten them before reseating connector. • Ensure GDU is receiving power. If a circuit breaker is tripped, determine source of short before resetting breaker. • Ensure circuit breakers have not failed and power wire connections are secure. • Switch MFD and PFD. o If problem follows unit, replace the display. Please note the position it failed in (PFD or MFD). o If problem does not follow unit, troubleshoot aircraft wiring for fault. SD card is stuck in GDU • DO NOT insert the screwdriver any length into the card slot. • DO NOT pry against the overlay. • DO NOT force the SD Card out. • Insert a small screwdriver in the groove on the side of the exposed end of the card to pull out the card. • Push the card in further to release the card locking mechanism. • Check SD Card for having more than one label. Two or more labels on the card will cause sticking. o Remove all but one label. • Ensure the SD card is from Toshiba or SanDisk. Use of other SD Cards is not recommended. • If card was inserted with the label facing to the right, do not attempt to remove. Return the unit to Garmin for repair Engine instruments are missing on the MFD Cannot navigate through pages on the MFD using the FMS knob • Clear user settings on each GDU by pressing and holding the CLR key while powering up each display. Leave the other display off while performing the clear operation. o If problem persists, replace GDU. G1000 Nav III Line Maintenance Manual Page 2-29 190-00352-00 Rev. L Symptom Recommended Action A button/knob/joystick does not appear to function • Go to the GDU TEST page in configuration mode and verify button, knob, or joystick operates correctly by observing a change in color from red to green in the button/knob/joystick icon when the button/knob/joystick is pressed. If a button is stuck, the button icon will be green without pressing the button as soon as you turn to the GDU TEST page. o If problem is verified, replace GDU. Terrain/topo does not display • Ensure supplemental data cards are inserted correctly in the lower slots of both GDU’s. • Allow the system to verify the data on the cards for approximately five minutes after power-up. o If the databases do not activate, reload the Terrain and Obstacle databases onto the SD Card or replace the card. Display will not track photocell Keyboard will not track photocell • Go to the GDU TEST page in configuration mode. Cover and uncover the photocell and verify the PHOTOCELL A or PHOTOCELL B value changes. o If problem persists, replace the display. Display will not track dimmer bus Keyboard will not track dimmer bus • Check display lighting settings on the Main Lighting page (system group page 3) • Check presence or integrity of pin 59 (J10001) • Check dimmer bus to verify voltage (refer to the airframe specific maintenance manual for troubleshooting). • Switch MFD and PFD: o If problem follows unit, replace the display. Display delaminating • Replace GDU, reference Garmin Service Bulletin 0527. 2.2.3 Database and Software Alerts Message Cause Solutions MFD1 DB ERR – MFD1 aviation database error exists. The MFD has encountered an error in the Jeppesen database. • Reload Jeppesen database • Replace MFD1 PFD1 DB ERR – PFD1 aviation database error exists. The PFD has encountered an error in the Jeppesen database. • Reload Jeppesen database • Replace the PFD MFD1 DB ERR – MFD1 basemap database error exists. The MFD has encountered an error in the basemap database. PFD1 DB ERR – PFD1 basemap database error exists. The PFD has encountered an error in the basemap database. • Contact Garmin Technical Support for assistance. MFD1 DB ERR – MFD1 terrain database error exists. The MFD has encountered an error in the terrain database. • Confirm datacard is inserted properly. • Reload Terrain database o If unable, replace supplemental datacard. o If problem persists, replace the MFD. Page 2-30 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 Message Cause Solutions PFD1 DB ERR – PFD1 terrain database error exists. The PFD has encountered an error in the terrain database. • Confirm datacard is inserted properly. • Reload Terrain database o If unable, replace supplemental datacard. o If problem persists, replace the PFD. MFD1 DB ERR – MFD1 obstacle database error exists. The MFD has encountered an error in the obstacle database. • Confirm datacard is inserted properly. • Reload obstacle database o If unable, replace supplemental datacard. o If problem persists, replace the MFD. PFD1 DB ERR – PFD1 obstacle database error exists. The PFD has encountered an error in the obstacle database. • Confirm datacard is inserted properly. • Reload obstacle database. o If unable, replace supplemental datacard. o If problem persists, replace the PFD. MFD1 DB ERR – MFD1 airport terrain database error exists. The MFD has encountered an error in the terrain database. • Confirm datacard is inserted properly. • Reload airport terrain database. o If unable, replace supplemental datacard. o If problem persists, replace the MFD. PFD1 DB ERR – PFD1 airport terrain database error exists. The PFD has encountered an error in the terrain database. • Confirm datacard is inserted properly. • Reload airport terrain database o If unable, replace supplemental datacard. o If problem persists, replace the PFD. MFD1 DB ERR – MFD1 Safe Taxi database error exists. The MFD has encountered an error in the Safe Taxi database. • Confirm datacard is inserted properly. • Reload Safe Taxi database o If unable, replace supplemental datacard. o If problem persists, replace the MFD. PFD1 DB ERR – PFD1 Safe Taxi database error exists. The PFD has encountered an error in the Safe Taxi database. • Confirm datacard is inserted properly. • Reload Safe Taxi database. o If unable, replace supplemental datacard. o If problem persists, replace the PFD. G1000 Nav III Line Maintenance Manual Page 2-31 190-00352-00 Rev. L Message Cause Solutions MFD1 DB ERR – MFD1 Chartview database error exists. The MFD has encountered an error in the Chartview database. • Confirm datacard is inserted properly. • Reload Chartview database. o If unable, replace supplemental datacard. o If problem persists, replace the MFD. PFD1 DB ERR – MFD1 Chartview database error exists. The PFD has encountered an error in the Chartview database. • Confirm datacard is inserted properly. • Reload Chartview database o If unable, replace supplemental datacard. o If problem persists, replace the PFD. DB MISMATCH – Aviation database version mismatch. Xtalk is off. The G1000 has found the Jeppesen aviation database in the PFD and MFD do not match. • Load current Jeppesen database to both displays. DB MISMATCH – Aviation database type mismatch. Xtalk is off. The G1000 has found the Jeppesen aviation database types do not match. • Load same type Jeppesen database to both displays. DB MISMATCH – Basemap database version mismatch. Xtalk is off. The PFD and MFD have different basemap versions installed. • Contact Garmin Technical Support for assistance. DB MISMATCH – Terrain database version mismatch. Xtalk is off. The PFD and MFD have different terrain database versions installed. • Insert two identical version Terrain database cards in the PFD and MFD. DB MISMATCH – Obstacle database version mismatch. Xtalk is off. The PFD and MFD have different obstacle database versions installed. • Insert two identical version obstacle database cards in the PFD and MFD. DB MISMATCH – Terrain database type mismatch. Xtalk is off. The PFD and MFD have different terrain database types installed. • Insert two identical version Terrain database cards in the PFD and MFD. SW MISMATCH – GDU software version mismatch. Xtalk is off. The G1000 has found the PFD and MFD software versions do not match. • Load correct software version into both PFD and MFD. MANIFEST – PFD1 software mismatch. Communication Halted. The system has detected an incorrect software version loaded in the PFD. MANIFEST – MFD software mismatch. Communication Halted. The system has detected an incorrect software version loaded in MFD. • Load correct software version. Page 2-32 G1000 Nav III Line Maintenance Manual Rev. L 190-00352-00 Message Cause Solutions CNFG MODULE – PFD1 configuration module is inoperative. The PFD master configuration module has failed. • Check master configuration module connector and wiring for damage inside the GDU connector backshell. o Replace master configuration module wiring and pins. o If problem persists, replace master configuration module. NOTE New Terrain/Obstacle cards, Jeppesen Aviation Database and other optional features (i.e. TAWS unlock card) will need to be replaced if the master configuration module is changed. The G1000 System ID number will change to a new number when installing a new master config module. The old Terrain and other cards will no longer work as they will remain locked to the old System ID number. 2.2.4 GDU Cooling Alerts Message Cause Solutions MFD1 COOLING – has poor cooling. Reducing power usage. MFD1 has exceeded it’s operating temperature range. • Check cooling fan and wiring for proper operation (if applicable). o If problem persists, replace the MFD. o If problem continues contact Garmin Aviation Product Support for assistance. PFD1 COOLING – has poor cooling. Reducing power usage. The PFD has exceeded it’s operating temperature range. • Check cooling fan and wiring for proper operation (if applicable). o If problem persists, replace the PFD. o If problem continues contact Garmin Aviation Product Support for assistance. G1000 Nav III Line Maintenance Manual Page 2-33 190-00352-00 Rev. L 2.2.5 Key Alerts Message Cause Solutions MFD1 “key” KEYSTK – key is stuck. The G1000 has determined a key is stuck on MFD1. • Go to the GDU TEST page in configuration mode and verify key is stuck (if key is stuck the corresponding indicator will b