Circuit/System Description
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
For an overview of the component/system, refer to: Camshaft Actuator System Description
The ECM compares the signals of the crankshaft position sensor and camshaft position sensor (s) to detect if the crankshaft and camshaft are misaligned.