Circuit/System Description
WARNING: This page is about a different car, the 2013 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
When the ignition is turned ON, the rear object sensor control module performs a self-test to verify if a critical malfunction exists within the system. During the power-up mode, the rear object sensor control module checks for a valid calibration data set.