Engine Cooling System: Overview Toyota Matrix E130

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1. CHECK COOLING SYSTEM FOR LEAKAGE Remove the radiator cap. CAUTION: To avoid the danger of being burned, do not remove the radiator cap while the engine and radiator are still hot. Thermal expansion will cause hot engine coolant and steam to blow out from the radiator. Fill the radiator with coolant, then attach a radiator cap tester. Warm up the engine. Pump it to 118 kPa (1.2 kgf/cm 2 , 17.1 psi), then check that the pressure does not drop. If the pressure drops, check the hoses, radiator and water pump for leakage. If there are no signs of external coolant leakage, check the heater core, cylinder block and head. Reinstall the radiator cap.
2. CHECK ENGINE COOLANT LEVEL OF RESERVOIR The engine coolant should be between the LOW and FULL lines when the engine is cold. If low, check for leakage 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 up to the FULL line.
3. CHECK ENGINE COOLANT QUALITY Remove the radiator cap. CAUTION: To avoid the danger of being burned, do not remove the radiator cap while the engine and radiator are still hot. Thermal expansion will cause hot engine coolant and steam to blow out from the radiator. Check for any excessive deposits of rust or scale around the radiator cap and radiator filler hole; the coolant should be free of oil. If excessively dirty, replace the coolant. Reinstall the radiator cap.
4. CHECK FIN FOR BLOCKAGE If the fins are clogged, wash them with water or a steam cleaner, then dry them with compressed air. NOTE: If the distance between the steam cleaner and core is too small, there is a possibility of damaging the fins, so keep to the following injection distances. INJECTION PRESSURE AND DISTANCE SPECIFICATION Injection Pressure kPa (kgf/cm 2 , psi) Injection Distance mm (in.) 2,942104,903 (30 to 50, 427 to 711) 300(11.811) 4,903 to 7,845 (50 to 80, 711 to 1,138) 500(19.685) If the fins are bent, straighten them with a screwdriver or pliers. Be careful not to expose electronic components to water.

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1. INSPECT THERMOSTAT HINT: The valve opening temperature is inscribed on the thermostat. Immerse the thermostat in water, then gradually heat the water. Check the valve opening temperature of the thermostat. Valve opening temperature: 80 to 84°C (176 to 183°F) If the valve opening temperature is not as specified, replace the thermostat. Check the valve lift. Valve lift: 10 mm (0.39 in.) or more at 95°C (203°F) If the valve lift is not as specified, replace the thermostat. Check that the valve is fully closed when the thermostat is at low temperatures (below 77°C (171 °F)). If not fully closed, replace the thermostat.
2. INSPECT RADIATOR CAP SUB-ASSY NOTE: If the radiator cap is contaminated, rinse it with water. Before using a radiator cap tester, wet the relief valve and pressure valve with engine coolant or water. When performing the following steps (a) and (b), keep the tester at an angle of 30° or more above the horizontal. Using a radiator cap tester, slowly pump and check that air comes from the vacuum valve. Pumping speed: 1 push every 3 seconds or more NOTE: Push the pump at a constant speed. If air does not come from the vacuum valve, replace the radiator cap. Pump the tester, then measure the relief valve opening pressure. Pumping speed: 1 push within 1 second NOTE: The above pumping speed is for the first pumping only (in order to close the vacuum valve). After the first pumping, the pumping speed can be reduced. Standard opening pressure: 74 to 103 kPa (0.75 to 1.05 kgf/cm 2 , 10.7 to 14.9 psi) Minimum opening pressure: 59 kPa (0.6 kgf/cm 2 , 8.6 psi) If the opening pressure is less than minimum, replace the radiator cap. HINT: Use the tester's maximum reading as the opening pressure.

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1. CHECK COOLING FAN OPERATION AT LOW TEMPERATURES (Below 83°C (181°F)) Turn the ignition switch to ON. Check that the cooling fan stops. If not, check the cooling fan relays and engine coolant temperature sensor, then check for disconnection of the connector or wire break between the cooling fan relay and engine coolant temperature sensor. Disconnect the engine coolant temperature sensor connector. Check that the cooling fan rotates. If not, check the fuses, cooling fan relays, ECM and cooling fan, then check for a short circuit between the cooling fan relay and engine coolant temperature sensor. Reconnect the engine coolant temperature sensor connector.
2. CHECK COOLING FAN OPERATION AT HIGH TEMPERATURES (Above 93°C (199°F)) Start the engine, then raise the coolant temperature to above 93°C (199°F). HINT: Coolant temperature is the value detected by the engine coolant temperature sensor on the cylinder head. Check that the cooling fan rotates. If not, replace the engine coolant temperature sensor.
3. INSPECT FAN Disconnect the fan connector. Connect the battery and ammeter to the fan connector. Check that the fan rotates smoothly, then check the reading on the ammeter. Standard: 7.9 to 10.9 A at 20°C (68 °F) If the amperage is not as specified, replace the cooling fan motor. Reconnect the fan connector.

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1. INSPECT COOLING FAN RELAY Check the resistance. Using an ohmmeter, measure the resistance between the terminals. COOLING FAN RELAY TERMINALS RESISTANCE Tester Connection Specified Condition 3-5 10kohm or higher 3-5 Below 1 a (Apply battery voltage to terminals 1 and 2) If the resistance is not as specified, replace the relay.
2. INSPECT COOLING FAN RELAY NO.2 Check the resistance. Using an ohmmeter, measure the resistance between each terminal. COOLING FAN RELAY NO 2 TERMINALS RESISTANCE Tester Connection Specified Condition 3-4 Below 1 a 3-4 10kohm or higher (Apply battery voltage to terminals 1 and 2) 3-5 10kohm or higher 3-5 Below 1 ohm (Apply battery voltage to terminals 1 and 2) If the resistance is not as specified, replace the relay.
3. INSPECT COOLING FAN RESISTOR (W/AIR CONDITIONING) Check the resistance. Using an ohmmeter, measure the resistance between the terminals. COOLING FAN RESISTOR TERMINALS RESISTANCE Tester Connection Specified Condition Positive (+)-Negative (-) 1.17 to 1.43 ohm at 20°C(68°F) If the resistance is not as specified, replace the cooling fan resister.

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1. DRAIN ENGINE COOLANT CAUTION: To avoid the danger of being burned, do not remove the radiator cap while the engine and radiator are still hot. Thermal expansion will cause hot engine coolant and steam to blow out from the radiator. Loosen the radiator drain cock plug and cylinder block water drain cock plug, then drain the coolant. Remove the radiator cap from the radiator. Close the radiator drain cock plug. Tighten the cylinder block water drain cock plug. Torque: 12.7 N.m (129 kgf.cm, 9 ft.lbf)
2. ADD ENGINE COOLANT Slowly fill the cooling system with coolant. Capacity: 6.5 liters (6.9 US qts, 5.7 Imp. qts) NOTE: Do not use plain water alone. HINT: Use of improper coolants may damage the engine cooling system. Use only 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 (coolant with long-life hybrid organic acid technology consists of a combination of low phosphates and organic acids). Toyota Super Long Life Coolant is premixed with 50 % coolant and 50 % deionized water. This coolant provides protection down to about -35°C (-31 °F). Check the coolant level inside the radiator by squeeze the inlet and outlet radiator hoses several times by hand. If the coolant level goes down, add the coolant. Install the radiator cap securely. Fill the radiator reserve tank with coolant. Warm up the engine. NOTE: Warm up the engine until the fan starts running with the A/C, heater and defroster all turned off. Squeeze the inlet and outlet radiator hoses several times by hand while warming up the engine. Stop the engine and wait until the coolant cools down. Remove the radiator cap and check the coolant level inside the radiator. If the coolant level is below the full level, perform the steps from ( a ) b c d e f g through ( h ) and repeat the operation until the coolant level remains of full. Recheck the coolant level inside the radiator reservoir tank. If it is below the full level, add coolant.
3. CHECK FOR ENGINE COOLANT LEAKAGE (See «COOLING SYSTEM (1ZZ-FE)»(ref-225902-S31651659182006032300000) )

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1. REMOVE ENGINE UNDER COVER RH
2. DRAIN ENGINE COOLANT (See «ENGINE COOLANT (1ZZ-FE)»(ref-225902-S38549849082006032300000) )
3. REMOVE FAN AND GENERATOR V BELT (See «FAN AND GENERATOR V BELT (1ZZ-FE)»(/toyota/matrix/e130-2002-2008/remont/accessory-drive-belts/#engine-mechanical) )
4. REMOVE GENERATOR ASSY (See «REPLACEMENT»(/toyota/matrix/e130-2002-2008/remont/charging-system/#starting-system-charging-system) )
5. REMOVE WATER PUMP ASSY Remove the 6 bolts, then remove the water pump. Remove the O-ring from the timing chain cover.
6. INSTALL WATER PUMP ASSY Install a new O-ring into the timing chain cover. Install the water pump with the 6 bolts. Torque: 9.0 N.m (92 kgf.cm, 80 in.lbf) for bolt A 11 N.m (112 kgf.cm, 8 ft.lbf) for bolt B
7. INSTALL GENERATOR ASSY (See «REPLACEMENT»(/toyota/matrix/e130-2002-2008/remont/charging-system/#starting-system-charging-system) )
8. ADD ENGINE COOLANT (See «ENGINE COOLANT (1ZZ-FE)»(ref-225902-S38549849082006032300000) )
9. CHECK FOR ENGINE COOLANT LEAKAGE (See «COOLING SYSTEM (1ZZ-FE)»(ref-225902-S31651659182006032300000) )

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1. INSPECT WATER PUMP ASSY Check the area of the water pump assembly indicated in the illustration for traces of coolant leakage. If leakage is found, replace the water pump.

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1. REMOVE ENGINE UNDER COVER RH
2. DRAIN ENGINE COOLANT (See «ENGINE COOLANT (1ZZ-FE)»(ref-225902-S38549849082006032300000) )
3. REMOVE FAN AND GENERATOR V BELT (See «FAN AND GENERATOR V BELT (1ZZ-FE)»(/toyota/matrix/e130-2002-2008/remont/accessory-drive-belts/#engine-mechanical) )
4. REMOVE GENERATOR ASSY (See «REPLACEMENT»(/toyota/matrix/e130-2002-2008/remont/charging-system/#starting-system-charging-system) )
5. REMOVE WATER INLET Remove the 2 nuts, then remove the water inlet.
6. REMOVE THERMOSTAT
7. INSTALL THERMOSTAT Install a new gasket onto the thermostat. Install the thermostat with the jiggle valve upward. HINT: The jiggle valve may be set within 10° of either side of the prescribed position.
8. INSTALL WATER INLET Torque: 11 N.m (112 kgf.cm, 8 ft.lbf)
9. INSTALL GENERATOR ASSY (See «REPLACEMENT»(/toyota/matrix/e130-2002-2008/remont/charging-system/#starting-system-charging-system) )
10. ADD ENGINE COOLANT (See «ENGINE COOLANT (1ZZ-FE)»(ref-225902-S38549849082006032300000) )
11. CHECK FOR ENGINE COOLANT LEAKAGE (See «COOLING SYSTEM (1ZZ-FE)»(ref-225902-S31651659182006032300000) )

See also:
• FAN AND GENERATOR V BELT (1ZZ-FE)
• REPLACEMENT
• AIR SWITCHING VALVE ASSY (2ZZ-GE)