2006 Lexus RX 400h Owners Manual - Page 520

IN CASE OF AN EMERGENCY IF YOUR VEHICLE OVERHEATS Your vehicle may have overheated if: D Engine coolant overheating. temperature gauge indicates B: If no steam is coming from your engine compartment: Leave the hybrid system on and turn off the air conditioning. Check the following. D Is the cooling fan operating? D Is the coolant in the acceptable range? D The warning message "WATER TEMP" appears in the multi−information display. D A power loss is experienced. D A loud knocking or pinging noise is heard. CAUTION D When the hybrid system is on, keep hands and clothing away from the moving fan. D Do not attempt to remove the radiator cap when the hybrid system and radiator are hot. Serious injury could result from scalding hot fluid and steam blown out under pressure. If the cooling fan is not operating or the coolant is not in the acceptable range, turn off the hybrid system and call your Lexus dealer. If both conditions are O.K., after the engine coolant temperature gauge has indicated normal range or "WATER TEMP" has disappeared, continue driving your vehicle. If the engine coolant temperature does not cool down, "WATER TEMP" disappears, or your vehicle overheats again, have it checked as soon as possible by your Lexus dealer. When the hybrid vehicle overheats Pull safely off the road, stop the vehicle and turn on your emergency flashers. Put the transmission in "P" and apply the parking brake. A: If steam is coming from your engine compartment: Turn off the hybrid system. Leave the hood closed until there is no sign of steam or coolant. Your engine may have been seriously damaged already. Call your Lexus dealer for assistance. CAUTION To help avoid personal injury, keep the hood closed until there is no steam. Escaping steam or coolant is sign of very high pressure. 484