2013 Lexus ES 350 Owners Manual - Page 790

7-2. Steps to take in an emergency 4 The coolant level is satisfactory if it is between the "FULL" and "LOW" line on the reservoir. 1 2 3 Reservoir cap "FULL" "LOW" 5 Add coolant if necessary. Water can be used in an emergency if coolant is unavailable. 6 Start the hybrid system and turn the air conditioning system on to check that the radiator cooling fan operates and to check for coolant leaks from the radiator or hoses. The fan operates when the air conditioning system is turned on immediately after a cold start. Confirm that the fan is operating by checking the fan sound and air flow. If it is difficult to check these, turn the air conditioning system on and off repeatedly. (The fan may not operate in freezing temperatures.) 7 When trouble arises 7 If the fan is not operating: Stop the hybrid system immediately and contact your Lexus dealer. If the fan is operating: Have the vehicle inspected at the nearest Lexus dealer. ES350 300h_OM_OM33A01U_(U)