2010 Toyota Prius Owners Manual - Page 216

2-2. Instrument cluster Energy monitor The energy monitor displays the operating condition of the hybrid system, showing such information as the gasoline engine operating status, and the usage and regeneration status of electrical energy. Gasoline engine Hybrid battery (traction battery) Electric motor (traction motor) The energy flow is indicated using arrows which vary in color and direction depending on the driving conditions (when accelerating/ decelerating, etc.). Multi-information display* When the vehicle is powered by the electric motor (traction motor) When the vehicle is powered by both the gasoline engine and the electric motor (traction motor) 190