Theory Of Operation
WARNING: This page is about a different car, the 2016 RAM 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The purpose of the diagnostic is to check Transmission Pressure Switch circuit for hydraulic failures by continuously monitoring the actual (ON/OFF) state of the Transmission Pressure Switch. If the pressure switch state is ON (pressure high) while the TCM commanded pressure is less than or equal to a calibrated threshold for a calibrated amount of time, a DTC will be set. If the pressure switch state is OFF (pressure low) while the TCM commanded pressure is greater than or equal to a calibrated threshold for a calibrated amount of time, a DTC will be set.