Theory Of Operation
WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
The purpose of the monitoring is to detect rationality failures of the input speed and output speed sensor signals as well as the wheel speed and engine speed CAN signals. There are three categories of rationalities which include: Multi sensor comparisons of up to three signals (input, output and wheel speed). Monitoring of the gradient of the input speed signal. Double failure monitoring to determine unique failure situations which could require unique limp-in functionality.