2007 Lexus RX 400h Owners Manual - Page 420

5-2. Steps to take in an emergency STEP 5 Add engine coolant if required. Water can be used in an emergency measure if engine coolant is unavailable. (→P. 407) Have the vehicle checked at your nearest Lexus dealer as soon as possible. n Overheating If you observe the following, your vehicle may be overheating. l The message WATER TEMP is displayed on the multi-information display. l The engine coolant temperature gauge enters the red zone or a loss of power is experienced. 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 other belts while the hybrid sys- tem is running. l Do not loosen the radiator cap while the hybrid system and radiator are hot. Serious injury, such as burns, may result from hot coolant and steam released under pressure. 398