Jeep Cherokee 2014 Owner's Manual page 193

Turns And Bends
When driving on a curve with ACC engaged, the system
may decrease the vehicle speed and acceleration for
stability reasons, with no target vehicle detected. Once
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 191
the vehicle is out of the curve the system will resume
your original Set Speed. This is a part of normal ACC
system functionality.
NOTE: On tight turns ACC performance may be limited.
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