2009 Lexus LS 600h Owners Manual - Page 636
2009 Lexus LS 600h Manual
Page 636 highlights
5-2. Steps to take in an emergency If your vehicle overheats The following may indicate that your vehicle is overheating: l The high engine coolant temperature warning light comes on or flashes: The engine may be overheating. l "Hybrid System Overheat" is shown on the multi-information display: The power control unit may be overheating. Follow the correction procedure as described below. Correction procedures n If the engine coolant temperature warning light comes on or flashes STEP 1 Stop the vehicle in a safe place and turn off the air conditioning system. STEP 2 Check to see if steam is coming out from the engine area. If you see steam: Stop the hybrid system. Carefully lift the hood after the steam subsides and then restart the hybrid system. If you do not see steam: Leave the hybrid system operating and carefully lift the hood. STEP 3 Remove the engine compartment cover. (→P. 527) STEP 4 Check if the cooling fans are operating. If the fans are operating: Wait until the high coolant temperature warning light goes off and then stop the hybrid system. If the fans are not operating: Stop the hybrid system immediately and call your local Lexus dealer. 640