Engine Drag Control (EDC)
WARNING: This page is about a different car, the 2008 GMC Yukon XL and 2008 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
When the driver releases the throttle, and the drag from the engine overcomes the frictional force between the tire and the road, EDC becomes active.
The EBCM sends a torque request signal to the ECM, which increases the torque at the wheels. This stabilizes the wheels by reducing the slip at the driven wheels.
When EDC is active, the driven wheels are controlled to a target below the non-driven wheels.