COOLING SYSTEM

OUTLINE

The cooling system is a pressurized, forced-circulation type. The radiator reserve tank assembly is not pressurized.
A thermostat with a by-pass valve is located in the water inlet with thermostat sub-assembly to maintain suitable temperature distribution in the cooling system.
A cooling fan control system in which the ECM optimally controls cooling fan speed is used.

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Toyota Genuine Super Long-Life Coolant (SLLC) is used.

*1	Water Inlet with Thermostat Sub-assembly	*2	Water Inlet Assembly
*3	Thermostat	*4	Radiator Assembly
*5	ATF Warmer (Transmission Oil Cooler)	-	-
*a	from Heater Radiator Unit Sub-assembly	*b	to Heater Radiator Unit Sub-assembly
*c	from Throttle Body with Motor Assembly	*d	to Throttle Body with Motor Assembly

SPECIFICATION

Engine Coolant

Toyota Genuine SLLC is used. The maintenance intervals are as shown in the table below:

Engine Coolant	Type		Toyota Genuine Super Long-Life Coolant (SLLC) or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite and non-borate coolant with long-life hybrid organic acid technology (coolant with long-life hybrid organic acid technology is a combination of low phosphates and organic acids). Do not use plain water alone.
	Color		Pink
	Maintenance Intervals	First Time	100000 miles (160000 km)
		Subsequent	Every 50000 miles (80000 km)

Tech Tips

SLLC is pre-mixed (50% coolant and 50% deionized water). Therefore, no dilution is needed when SLLC in the vehicle is added or replaced.