On Demand Self Test
WARNING: This page is about a different car, the 2018 Jaguar XE and 2017 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
The On Demand Self Test routine is used to test the operation of the transfer case clutch without driving the vehicle. When the On Demand Self Test has finished, check the transfer case control module for DTCs and perform the relevant corrective actions.