Garmin G3X Installation Manual page 656

12. Go to the AP page in configuration mode and verify the TRIM MOTOR CONTROL is disabled
for all servos.
NOTE
Initial autopilot tuning is done with the trim control disabled to avoid the auto-trim
function from interfering with the initial autopilot tuning.
a) By disabling the TRIM MOTOR CONTROL, this will disable auto-trim and airspeed
scheduled trim, but the pilot can still control trim in the aircraft using the normal manual
electric trim inputs. Auto-trim and airspeed scheduled trim will be setup later in the
autopilot setup procedure.
13. Go to the AP gain in configuration mode and set the proper min/max airspeed limits for the pitch
servo. The pitch servo will lower or raise the nose of the aircraft to try and keep it inside these
airspeed limits.
a) The min airspeed limit should be set above the stall speed of the aircraft with some margin.
b) The max airspeed limit should be set below the never exceed speed of the aircraft with some
margin.
190-01115-01 G3X/G3X Touch Install Manual - GDU 45X/46X Config and Post Install Checkout
Rev. AA Page 32-61