COOLING SYSTEM > ON-VEHICLE INSPECTION

for Preparation Click here

CAUTION:

Do not remove the reserve tank cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

NOTICE:

Before performing each inspection, turn the A/C switch off.

1. Remove the reserve tank cap.
   

2. Fill the reserve tank with coolant, and then attach a radiator cap tester.
   

3. Put the engine in inspection mode (Click here).
   

4. Warm up the engine.
   

5. Using a radiator cap tester, increase the pressure inside the radiator to 108 kPa (1.1 kgf/cm², 16 psi), and check that the pressure does not drop. If the pressure drops, check the hoses, radiator, front exhaust pipe assembly, the heater hose around the engine coolant temperature sensor and engine water pump assembly for leaks. If no external leaks are found, check the heater core, cylinder block and cylinder head.
   

6. Remove the radiator cap tester.
   

7. Install the reserve tank cap.
   

1. Check that the engine coolant level is between the low and full lines when the engine is cold.
   

   Text in Illustration 

   *1	Full Line
   *2	Low Line

   HINT:

   If the engine coolant level is low, check for leaks and add "TOYOTA Super Long Life Coolant" or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite and non-borate coolant with long-life hybrid organic acid technology to the full line.

1. Remove the reserve tank cap.
   

   CAUTION:

   Do not remove the reserve tank cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

2. Check if there are any excessive deposits of rust or scales around the reserve tank cap and reserve tank filler hole. Also, the coolant should be free of oil.
   If excessively dirty, clean the coolant passage and replace the coolant.
   

3. Install the reserve tank cap.