ON-VEHICLE INSPECTION
HINT
It is normal for the cooling fan to sometimes rotate when the ignition is turned from ACC to ON.
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- CHECK COOLING FAN OPERATION AT LOW TEMPERATURES (Below 94°C (201 °F)) Turn the ignition switch to ON with the A/C switch OFF. 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.
- CHECK COOLING FAN OPERATION AT HIGH TEMPERATURES (Above 96°C (205°F)) Start the engine, then raise the coolant temperature to above 96°C (205°F). HINT: Coolant temperature is the value detected by the engine coolant temperature sensor on the cylinder head. Check that the A/C switch is OFF. Check that the cooling fan rotates. If not, replace the engine coolant temperature sensor.
- 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 amperage: 5.2 to 8.2 A at 20°C (68°F) If the amperage is not as specified, replace the cooling fan motor. Reconnect the fan connector.
- INSPECT NO. 2 FAN Disconnect the No. 2 fan connector. Connect the battery and ammeter to the No. 2 fan connector. Check that the No. 2 fan rotates smoothly, then check the reading on the ammeter. Standard amperage: 5.2 to 8.2 A at 20°C (68°F) If the amperage is not as specified, replace the cooling fan motor. Reconnect the No. 2 fan connector.
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- INSPECT COOLING FAN RELAY Check the resistance. Using an ohmmeter, measure the resistance between the terminals. STANDARD: COOLING FAN RELAY RESISTANCE SPECIFICATION Tester Connection Specified Condition 3-5 10 kohm 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.
- INSPECT COOLING FAN RELAY NO.2 Check the resistance. Using an ohmmeter, measure the resistance between each terminal. STANDARD: COOLING FAN RELAY NO.2 RESISTANCE SPECIFICATION Tester Connection Specified Condition 3-4 Below 1 ohm 3-4 10 kohm or higher (Apply battery voltage to terminals 1 and 2) 3-5 10 kohm 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.
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- 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 (lower side) and water drain cock plug, then drain the coolant. Remove the radiator cap. Close the radiator drain cock plug (lower side). Tighten the water drain cock plug. Torque: 12.7 N.m (129 kgf.cm, 9 ft.lbf)
- ADD ENGINE COOLANT Loosen the radiator drain cock plug (upper side) by 3 turns. Connect a vinyl tube to the air bleed port. Fill the radiator with coolant from the fill port. Add coolant until it overflows from the air bleed port and it remains inside the vinyl tube, then tighten the radiator drain cock plug (upper side). Capacity: MANUAL TRANSAXLE: 6.8 liters (7.2 US qts, 6.0 lmp. qts) AUTOMATIC TRANSAXLE: 6.7 liters (7.1 US qts, 5.9 lmp. qts) Engine Coolant: 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). NOTE: Do not substitute water for engine coolant. 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 pressing the inlet and outlet radiator hoses several times by hand. If the coolant level goes down, add coolant. Install the radiator cap securely. Slowly pour coolant into the radiator reservoir until it reaches the FULL line. Warm up the engine until the cooling fan operate. Set the air conditioning as follows while warming up the engine. MANUAL AIR CONDITIONING SYSTEM CONTROLS REFERENCE Manual air conditioning system Set control as follows Fan speed - Any setting except "OFF" Temperature - Toward WARM Air conditioning switch "OFF" Maintain the engine speed at 2,000 to 2,500 RPM and warm up the engine until the cooling fan operate. Press 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 h i through ( j ) and repeat the operation until the coolant level stays the full level. Recheck the coolant level inside the radiator reservoir tank. If it is below the full level, add the coolant.
- CHECK FOR ENGINE COOLANT LEAKAGE Fill the radiator with engine coolant and attach a radiator cap tester. Pump it to 118 kPa (1.2 kgf/cm 2 , 17.1 psi) and check for leakage.
