2010 Lexus RX 450h User Guide 3 - Page 70

Hybrid System Your vehicle is a hybrid vehicle. It has characteristics different from conventional vehicles. Be sure you are closely familiar with the characteristics of your vehicles, and operate with care. The hybrid system combines a gasoline engine and an electric motor (traction motor) according to driving conditions, improving fuel efficiency and reducing exhaust emissions. For details, refer to the "Owner's Manual". n Hybrid System Indicator Displays the output and regeneration level of the hybrid system. l By keeping the indicator within the Eco area, more fuel-efficient driving can be achieved. l The Charge area indicates regeneration status. n Regenerative braking The motor generator converts kinetic energy to electric energy when: l The accelerator pedal is released. l The brake pedal is depressed with the shift lever in D or S. n Sounds and vibrations specific to a hybrid vehicle There may be no engine sounds or vibrations even though the vehicle is able to move. Always put the shift lever in P when parked. The following sounds or vibrations may occur when the hybrid system is operating, and are not a malfunction: l Motor sounds may be heard from the engine compartment. l Sounds may be heard from the hybrid battery (traction battery) under the rear seat when the hybrid system starts or stops. l Sounds from the hybrid system may be heard when the back door is open. l Sounds may be heard from the hybrid transmission when the engine is started or stopped, or while the engine is idling. l Engine sounds may be heard when accelerating sharply. l Sounds may be heard due to regenerative braking when the brake pedal is depressed and accelerator is loosened. l Vibrations may be felt when the gasoline engine starts or stops. l Cooling fan sounds may be heard from the air intake vents under the rear seat. 7