2009 Lexus GS 450h Owners Manual - Page 615

5-2. Steps to take in an emergency If your vehicle overheats If your hybrid system overheats: STEP 1 STEP 2 STEP 3 STEP 4 STEP 5 Stop the vehicle in a safe place and turn off the air conditioning system. Check to see if steam is coming out from under the hood. 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. Remove the engine compartment cover. (→P. 439) Check to see if the cooling fan is operating. If the fan is operating: Wait until the engine coolant temperature gauge begins to fall and then stop the hybrid system. If the fan is not operating: Stop the hybrid system immediately and call your local Lexus dealer. After the hybrid system has cooled down sufficiently, check the coolant level and inspect the radiator core (radiator) for any leaks. 5 When trouble arises 557 GS_HV_U (OM30B44U) March 8, 2010 10:03 am