Circuit/System Description
WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
The instrument cluster turns the ABS indicator on for five seconds after the ignition is turned on, or when the electronic brake control module detects a fault it sends a serial data message to the instrument cluster commanding the indicator on.