190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page H-41
H.4.5.3 Step by Step On-Ground Setup
Servo Wiring Checkout
The first phase of setting up the Garmin autopilot system is to verify the proper wiring of the GSA 28
servos while on the ground.
1. If the installation is a 1-axis (roll only) autopilot, use the LRU page in configuration mode on the
PFD to configure the “Autopilot Servos” for “Roll Only”.
2. If you have installed a 2-axis (pitch and roll) autopilot, use the LRU page in configuration mode on
the PFD to configure the “Autopilot Servos” for “Pitch + Roll”.
3. If you have installed a 3-axis (pitch, roll, and yaw) autopilot, use the LRU page in configuration
mode on the PFD to configure the “Autopilot Servos” for “Pitch + Roll + YD”.
4. Go to the Main page in configuration mode and verify the Roll, Pitch, and Yaw servos are properly
communicating with the system indicated by a green check box.
5. Go to the Main page in configuration mode and verify the CWS/DISCONNECT INPUT is
properly wired for each servo.
a) The CWS/DISCONNECT input should be LOW when the autopilot disconnect button is
pressed.
b) The CWS/DISCONNECT input should be OPEN when the autopilot disconnect button is
NOT pressed.
c) The system will compare the CWS/DISCONNECT INPUT from all servos, press and hold
the autopilot disconnect button for at least 5 seconds to verify there are no SYNC faults.
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