190-01115-01
G3X/G3X Touch Installation Manual - Installation Preparation
Rev. AC
Page 2-16
2.3.1.1 Backshell Assemblies
Connector kits include backshell assemblies. The backshell assembly houses the configuration module
and a thermocouple reference junction. Garmin’s backshell connectors give the installer the ability to
quickly and easily terminate shield grounds at the backshell housing. The instructions needed to install the
Jackscrew Backshell, Configuration Module, Shield Block Ground, and Thermocouple are located in
.
NOTE
The GDU 37X rear connector (J3701) is electrically isolated. For installations using
shielded cables, a ground pin must be tied to the connector shell (
).
2.3.1.2 Configuration Module
The G3X system is designed to store configuration and calibration data in multiple locations to retain the
configuration of the system during maintenance. A configuration module (Figure 2-3 and Figure 2-4) is
installed in the connector backshell of the PFD1 display to store important configuration data. Only the
PFD1 display uses a configuration module; in systems using a GSU 73, an additional configuration module
is installed in the GSU 73 connector backshell. See
for installation instructions.
Figure 2-3 Original Green Configuration Module P/N 011-00979-20
Figure 2-4 shows the Apple® iOS compatible configuration module that installs on the GDU 4XX
(PFD 1) connector backshell. This configuration module is required for using Connext capability with
Apple products. Contact Garmin Aviation Product Support if the GDU 4XX unit was sold with an original
green configuration module. See
for installation instructions.
NOTE
Please refer to the G3X Touch Pilot’s Guide (190-01754-00) for guidance in using
Connext Bluetooth connections to Garmin Pilot device(s).
To test for the installation of the Apple iOS compatible configuration module, enter config mode, select the
System Information page, highlight PFD1, press Menu, and run the Apple compatibility test.
Figure 2-4 Apple iOS Compatible Black Configuration Module P/N 010-12253-00
