Engine Drag Control (EDC)
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. 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.