Hybrid Transmission Modes of Operation: Reverse
WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
When the vehicle is placed in reverse the Hybrid Low 1-2 Clutch is locked and Motor 2 spins backwards and provides output torque to the wheels. When needed the engine starts and Motor 1 is used to charge the hybrid battery and DC power from the battery flows to the HPCM where it is converted into 3-phase AC power to drive motor 2.