The following may indicate that your vehicle is overheating.
Correction procedures 1. Stop the vehicle in a safe place and turn off the air conditioning system, and then stop the engine. 2. If you see steam: Carefully lift the hood after the steam subsides. If you do not see steam: Carefully lift the hood. 3. After the engine has cooled down sufficiently, inspect the hoses and radiator core (radiator) for any leaks.
If a large amount of coolant leaks, immediately contact your Toyota dealer. 4. The coolant level is satisfactory if it is between the "F" and "L" lines on the reservoir.
5. Add coolant if necessary. Water can be used in an emergency if coolant is unavailable. 6. Start the engine 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. If the fan is not operating: Stop the engine immediately and contact your Toyota dealer. If the fan is operating: Have the vehicle inspected at the nearest Toyota dealer.
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Toyota Avalon Service & Repair Manual > Sliding Roof System(for Gasoline Model): Operation Check
OPERATION CHECK CHECK AUTO OPERATION FUNCTION NOTICE: Make sure that initialization has been completed before performing this inspection. Click here The sliding roof auto operation can be customized. Make sure that the auto operation customize setting is set to ON. Click here HINT: When a switch is ...