When Monitored

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.

This diagnostic runs continuously when the following conditions are met:

TCM supply voltage is between 10 and 16 volts.
Ignition switch Run position signal is detected via dedicated circuit to TCM.
Engine speed (CAN Message) is greater than 550 RPM.
No ignition switch DTCs set.
No CAN bus DTCs set.
No PCM communication DTCs set.
The PTO enable request from the PCM was ON at some point during the current trip.
The TCM is commanding the PTO ground switch OFF (low).