Four Wheel Drive (4WD) Gauge
WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The 4WD gauge displays the level of torque applied to each wheel in a bar graph depicted over the vehicle. The IPC uses 2 inputs to determine the 4WD gauge display. The first is the wheel torque data message sent from the PCM . The second is the 4WD lock torque message also sent from the PCM .
As torque is applied to the wheels, the bars in the display begin to illuminate. The lowest torque displayed is the first bar closest to the wheel. As the amount of torque increases, additional bars are illuminated outward from the wheel.