Garmin G1000 NXi Reference Manual page 188

Additional Features
Electronic Stability and Protection (ESP™) is an optional feature that is intended
to discourage the exceedance of attitude and established airspeed parameters. This
feature will only function when the aircraft is above 200 feet AGL and the autopilot is
not engaged.
Aircraft equipped with Garmin Electronic Stability and Protection (ESP) will
display "Electronic Stability and Protection System; Garmin ESP" on the power-up
page. Aircraft without ESP will not have any ESP indication.
With ESP (reference)
ESP engages when the aircraft exceeds one or more conditions beyond the normal
flight envelope (pitch, roll, VNE, or impending stall). Enhanced stability for each
condition is provided by applying a force to the appropriate control surface to return
the aircraft to the normal flight envelope. This is perceived by the pilot as resistance
to control movement in the undesired direction when the aircraft approaches a steep
attitude, high speed, or impending stall condition.
The ESP feature will only function when the aircraft meets the following conditions:
The aircraft is in flight. The system infers this by speed. If the aircraft
GPS ground speed is over 30 knots, or True Airspeed is over 50 Knots.
The aircraft is above 200 feet AGL (GPS Altitude), if GPS altitude is
available.
The autopilot is not engaged, meaning the pilot is "hand flying."
The Aircraft is within the maximum engagement limit range defined as
Pitch (±50º) and Bank (±75º).
162
Garmin G1000 NXi Cockpit Reference Guide for the Cessna NAV III
MFD Power-up Page Examples
Without ESP (reference)
190-02178-02 Rev. A