2010 Toyota Highlander Owners Manual - Page 212
2010 Toyota Highlander Manual
Page 212 highlights
2-1. Driving procedures EV-Drive Mode In EV-Drive Mode the electric motor (traction motor), powered by the hybrid battery (traction battery), is used to drive the vehicle. On/off When EV-Drive Mode is turned on, the EV-Drive Mode indicator will come on. Pressing the switch when in EV-Drive Mode will return to normal driving (using the gasoline engine and electric motor [traction motor]).