2008 Toyota Prius Owners Manual - Page 483

5-2. Steps to take in an emergency STEP 6 Add coolant if required. Water can be used in an emergency measure if coolant is unavailable. (→P. 467) ITY52P019 Have the vehicle checked at your nearest Toyota dealer as soon as possible. n Overheating In the following situations, your vehicle may be overheating. l High coolant temperature warning light is displayed on the touch screen. l Steam is coming from under the hood. CAUTION n To prevent an accident or injury when inspecting under the hood of your vehicle l Keep hands and clothing away from the fan and engine drive belt while the engine is running. l Do not loosen the radiator cap while the engine and radiator are hot. Serious injury, such as burns, may result from hot coolant and steam released under pressure. 5 When trouble arises 457 PRIUS_U_(L/O_0802)