Heat Protection - Power Transfer Unit (PTU)

During excessive use or trailer towing the AWD system may implement a heat protection mode to protect the PTU from damage. Without power transfer unit (PTU) temperature sensors, the PCM performs calculations to determine the need for the heat protection mode. The AWD system reduces commanded torque only to situation deemed critical for minimal function. Once the maximum temperature limit is reached, then FWD only is commanded. The PTU on vehicles equipped with the 6F50/55 transmission is equipped with a temperature sensor.