On-Vehicle Inspection [02/2024 - ]: Procedure

INSPECT FOR COOLANT LEAK

WARNING:

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

Pre-procedure1

Remove the radiator reserve tank cap.

Fill the radiator assembly with engine coolant, and then install a radiator cap tester.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Radiator Cap Tester

Put the engine in Inspection Mode (Maintenance Mode).
HINT:

Refer to INSPECTION MODE PROCEDURE [02/2024 - ]
Warm up the engine.
Procedure1
Pump the radiator cap tester to 108 kPa (1.1 kgf/cm ² , 16 psi), and then check that the pressure does not drop.
- If the pressure drops, check the hoses, radiator assembly and engine water pump assembly for leaks.
- If there are no signs of external engine coolant leaks, check the heater core, cylinder block sub-assembly and cylinder head sub-assembly.
Post-procedure1
Remove the radiator cap tester.
Install the radiator reserve tank cap.

INSPECT ENGINE COOLANT LEVEL IN RESERVOIR TANK

Check that the engine coolant level is between the L line and F line when the engine is cold.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	F Line
*b	L Line

If the engine coolant level is low, check for leaks and add engine coolant to the F line.

NOTE:

Do not substitute plain water for engine coolant.

INSPECT ENGINE COOLANT QUALITY

WARNING:

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

Pre-procedure1

Remove the radiator reserve tank cap.

Procedure1

Check if there are any excessive deposits of rust or scale around the radiator cap sub-assembly and water filler hole. Also, the engine coolant should be free of oil.
If excessively dirty, replace the engine coolant.

Post-procedure1
Install the radiator reserve tank cap.