Theory Of Operation
WARNING: This page is about a different car, the 2024 Jeep Grand Cherokee L. However, it is still accessible from the selected car via links, so may be relevant.
The purpose of the diagnostic is to detect an unwanted driving direction. A rationality check is performed between the measured directions of Input Speed Sensor and Output Speed Sensor signals and the calculated driving direction. The calculated driving direction is based on the commanded currents of the pressure regulators.