16 - Cooling.pdf - Sam Naprawiam Toyota Corolla E12 2001-2007 ENG up by dunaj2 - j_czaja1

16–1

COOLING

–

COOLING SYSTEM (April, 2003)

ON–VEHICLE INSPECTION

160NX–02

Radiator Cap Tester

1. INSPECT COOLING SYSTEM FOR LEAKS

CAUTION:

To avoid the danger of being burned, do not remove the ra-

diator cap while the engine and radiator are still hot, as fluid

and steam can be blown out under pressure.

(a) Fill the radiator with coolant and attach a radiator cap tes-

ter.

(b) Warm up the engine.

the pressure does not drop.

A65935

HINT:

If the pressure drops, check the hoses, radiator or water pump

for leaks. If no external leaks are found, check the heater core,

cylinder block and head.

2. CHECK ENGINE COOLANT LEVEL AT RESERVOIR

(a) The engine coolant level should be between the ”LOW” and ”FULL” line.

HINT:

If low, check for leaks and add ”Toyota Long Life Coolant” or equivalent up to the ”FULL” line.

3. CHECK ENGINE COOLANT QUALITY

(a) 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, as fluid and steam can be blown out under pressure.

(b) Check if there is any excessive deposits of rust or scale around the radiator cap and radiator filler hole;

the coolant should be free from oil.

HINT:

If excessively dirty, replace the coolant.

2004 COROLLA (RM1037U)

Author:

Date:

1183

16–2

COOLING

–

COOLING SYSTEM (April, 2003)

4. INSPECT FINS BLOCKAGE

(a) If fins are clogged, wash them with water or a steam

cleaner and dry with compressed air.

NOTICE:

A73603

Injection Distance

mm (in.)

2,942 to 4,903

(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 pour water directly onto electronic

components.

2004 COROLLA (RM1037U)

Author:

Date:

1184

If the distance between the steam cleaner and core is

too close, there is a possibility of damaging the fins,

so keep the following injection distance.

Injection Pressures

kPa (kgf/cm 2 , psi)

16–3

COOLING

–

COOLING SYSTEM (April, 2003)

INSPECTION

160C5–04

THERMOSTAT

HINT:

The thermostat is numbered with the valve opening tempera-

ture.

P13560

(a) Immerse the thermostat in water and gradually heat the

water.

(b) Check the valve opening temperature.

Valve opening temperature:

80 to 84

C (176 to 183

HINT:

If the valve opening temperature is not as specified, replace the

thermostat.

P00436

Valve lift: 10 mm (0.39 in.) or more at 95

C (203

HINT:

If the valve lift is not as specified, replace the thermostat.

(d) Check that the valve is fully closed when the thermostat

is at low temperatures (below 77

C (171

F)).

P24125

HINT:

If not closed, replace the thermostat.

2. RADIATOR CAP SUB–ASSY

NOTICE:

If the radiator cap has contaminations, always rinse

it with water.

Before using a radiator cap tester, wet the relief valve

and pressure valve with engine coolant or water.

When performing step (a) and (b) below, keep the tes-

ter at an angle of over 30

above the horizontal.

2004 COROLLA (RM1037U)

Author:

Date:

1185

16–4

COOLING

–

COOLING SYSTEM (April, 2003)

Radiator Cap Tester

(a) Using a radiator cap tester, slowly pump the tester and

check that air is coming from the vacuum valve.

Pump speed: 1 push / 3 seconds or more

NOTICE:

Push the pump at a constant speed.

If air is not coming from the vacuum valve, replace the radiator

cap.

(b) Pump the tester and measure the relief valve opening

pressure.

Pump speed: 1 push within 1 second

NOTICE:

The above pump speed is for the first pump only (in order

to close the vacuum valve). After the first pump, the pump

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 , 8.5 psi)

or more

Radiator Cap

Z00570

HINT:

Use the tester’s maximum reading as the opening pressure.

If the opening pressure is less than minimum, replace the radia-

tor cap.

2004 COROLLA (RM1037U)

Author:

Date:

1186

16–5

COOLING

–

COOLING FAN SYSTEM

ON–VEHICLE INSPECTION

1. CHECK COOLING FAN OPERATION WITH LOW TEMPERATURE (Below 83 C (181 F))

(a) Turn the ignition switch ON.

(b) Check that the cooling fan stops.

HINT:

If not, check the cooling fan relay and water temperature sensor, and check for separated connector or se-

vered wire between the cooling fan relay and water temperature sensor.

(d) Check that the cooling fan rotates.

If not, check the fuses, cooling fan relay, ECM and cooling fan, and check for a short circuit between the

cooling fan relay and water temperature sensor.

(e) Reconnect the water temperature sensor connector.

2. CHECK COOLING FAN OPERATION WITH HIGH TEMPERATURE (Above 93 C (199 F))

(a) Start the engine, and raise coolant temperature to above 93

160C6–02

C (199

F).

HINT:

Coolant temperature is the detected value by the water temperature sensor on the water outlet.

(b) Check that the cooling fan rotates.

HINT:

If not, replace the water temperature sensor.

3. INSPECT COOLING FAN

(a) Disconnect the cooling fan connector.

(b) Connect battery and ammeter to the connector.

Standard amperage:

Approx. 8.0 – 12.0 A at 20 C (68 F)

(d) Reconnect the cooling fan connector.

2004 COROLLA (RM1037U)

Author:

Date:

1187

16 - Cooling.pdf

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