Heat Protection - Power Transfer Unit
WARNING: This page is about a different car, the 2022 Lincoln Nautilus. However, it is still accessible from the selected car via links, so may be relevant.
During excessive use or when towing a trailer, the AWD system may implement a heat protection mode to protect the power transfer unit from damage. Using the input from power transfer unit temperature sensors, the AWD module performs calculations to determine the demand for use of the heat protection mode. The AWD system then reduces the commanded torque being applied by the RDU to the rear axles, and/or disconnects the power transfer unit dog clutch. Once the maximum temperature limit is reached, AWD mode only is commanded and the AWD temporarily disabled or AWD OFF message is displayed in the IPC.