COOLING SYSTEM GENERAL

OUTLINE

The cooling system uses a pressurized forced circulation system with a pressurized reservoir tank.
The pressurized reservoir tank is used to prevent the engine coolant from deteriorating upon contact with external air.
A thermostat with a bypass valve is located on the water inlet housing to maintain suitable temperature distribution in the cooling system.
An aluminum radiator core is used for weight reduction.
A water-cooled type engine oil cooler is used.

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

Text in Illustration (Models Compliant with EURO 5 Emission Regulations:)
*A	Cold Area Specification Models	-	-
*1	Reservoir Tank	*2	Radiator Assembly
*3	Thermostat	*4	Compressor Inlet Elbow
*5	Oil Cooler	*6	Electric EGR Control Valve Assembly
*7	EGR Cooler (EGR Pipe Sub-assembly)	*8	Ventilation Pipe Sub-assembly
*a	To Heater	*b	From Heater

Text in Illustration (Models Compliant with EURO 4 Emission Regulations:)
*A	Except Models with Wastegate Valve Type Turbocharger for Morocco	*B	Models with Variable Nozzle Vane Type Turbocharger
*C	Cold Area Specification Models (Including Models with Variable Nozzle Vane Type Turbocharger for Morocco)	-	-
*1	Reservoir Tank	*2	Radiator Assembly
*3	Thermostat	*4	Compressor Inlet Elbow
*5	Oil Cooler	*6	Turbo Water Pipe
*7	EGR Cooler (EGR Pipe Sub-assembly)	*8	Ventilation Pipe Sub-assembly

Text in Illustration (Except Models Compliant with EURO 5 and EURO 4 Emission Regulation:)
*A	Models with Variable Nozzle Vane Type Turbocharger	*B	Cold Area Specification Models
*1	Reservoir Tank	*2	Radiator Assembly
*3	Thermostat	*4	Oil Cooler
*5	Turbo Water Pipe	*6	Compressor Inlet Elbow
*7	Ventilation Pipe Sub-assembly	-	-

SPECIFICATION

Engine Coolant

Toyota Genuine SLLC is used. 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.
Maintenance Intervals	First Time	160000 km (100000 miles)
	Subsequent	Every 80000 km (50000 miles)
Color		Pink

Tech Tips

SLLC is pre-mixed (50% coolant and 50% deionized water*1 or 40% coolant and 60% deionized water*2). Therefore, no dilution is needed when SLLC in the vehicle is added or replaced.

*1: Models for Europe

*2: Except models for Europe
If LLC (red-colored) is mixed with SLLC (pink-colored), the interval for LLC (every 40000 km/25000 miles or 24 months whichever comes first) should be used.