Cooling System: Testing and Inspection

2AZ-FXE COOLING: COOLING SYSTEM: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION





1. INSPECT FOR COOLANT LEAK (for Engine)
NOTICE: Before performing each inspection, turn the A/C switch OFF.
CAUTION: Do not remove the radiator cap while the engine and radiator are still hot. Pressurized, hot coolant and steam may be released and cause serious burns.

(a) Fill the radiator with coolant and attach a radiator cap tester.
(b) Set the vehicle to inspection mode. Component Tests and General Diagnostics
(c) Start the engine, and warm it up.
(d) Using a radiator cap tester, increase the pressure inside the radiator to 118 kPa (1.2 kgf*cm, 17 psi), and check that the pressure does not drop.
If the pressure drops, check the hoses, radiator and water pump for leaks. If no external leaks are found, check the heater core, cylinder block and cylinder head.
2. INSPECT COOLANT LEVEL IN RESERVOIR (for Engine)
(a) Check that the coolant level is between the LOW and FULL lines when the engine is cold.
If the 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.
NOTICE: Do not substitute plain water for coolant.

3. INSPECT COOLANT QUALITY (for Engine)
(a) Remove the radiator cap.
CAUTION: Do not remove the radiator cap while the engine and radiator are still hot. Pressurized, hot coolant and steam may be released and cause serious burns.

(b) Check if there are any excessive deposits of rust or scales around the radiator cap and radiator filler hole. Also, the coolant should be free of oil.
If excessively dirty, clean the coolant passage and replace the coolant.
(c) Install the radiator cap.