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Cooling - Cooling syste2. Check engine coolant level in reservoir.Engine coolant level should be between “Low” and “Full” mark line.
Hint: if the level is too low, check there is leakage and refill coolant to “Full” mark line.3. Check engine coolant quality.(a) Remove radiator cap.
Warning: when the temperature of engine and radiator is high, do not remove radiator cap to
avoid being scalded, because coolant and steam will spurt under high pressure.
(b) Check there is too much rust deposit around radiator cap or at outlet and check there is flake; there
should not be oil in the coolant.
Hint: if coolant is too dirty, it is required to replace coolant.
(c) Install back radiator cap.Inspection1. Temperature regulatorHint: the figure on temperature regulator is the
opening temperature of valve.CoolingCooling systemOn-vehicle inspection1. Check there is leakage with cooling system.Warning: when the temperature of engine and radiator is
high, do not remove radiator cap to avoid be-
ing scalded, because coolant and steam will
spurt under high pressure.
(a) Refill coolant to radiator, and install radiator cap tester.
(b) Preheat engine.
(c) Pump tester to make pressure go up to 118KPa, and check
the pressure falls.
Hint: if the pressure falls, check there is leakage with
hose, radiator or water pump, and check heater,
cylinder body and cylinder head if no external leak-
age is found.66
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Cooling - Cooling fan systemCooling fan systemOn-vehicle inspection1. Check cooling fan function at low temperature (below 95).(a) Turn ignition switch to ON.
(b) Check cooling fan is stopped.
Hint: if it is not stopped, check cooling fan relay and water temperature sensor, or check the
joint or wire harness between them.
(c) Uncouple water temperature sensor joint.
(d) Check cooling fan runs.
If it does not run, check fuse, cooling fan relay, engine ECU and cooling fan, or check there is short
circuit between them.
(e) Connect back water temperature sensor joint.2. Check cooling fan function at high temperature (above 95).(a) Start engine and increase coolant temperature up to above Hint: water temperature is the value measured by water temperature sensor on water outlet.
(d) Check cooling fan runs.
Hint: if it does not run, please replace water temperature sensor.3. Check cooling fan.(a) Uncouple cooling fan joint.
(b) Connect battery and ampere meter to cooling fan joint.
(c) Check cooling fan runs normally and check ampere meter reading.Standard current: 712A
(d) Connect back cooling fan joint.Inspection1. Electronic fan relay [67000064]
2. Electronic fan relay II [67000072]
3. Cooling fan speed adjusting resistance assembly
[67000001]Measure resistance between terminals with ohmmeter.
Resistance: at normal temperature: 1.368 Specified
conditions
Normal stateConductionConductionTerminal connected
by three-use meter Conditions
Supply battery voltage
to No. 1 and No. 2
terminals
Specified
conditions
Normal stateConductionConductionTerminal connected
by three-use meter Conditions
Supply battery voltage
to No. 1 and No. 2
terminals
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Cooling - Water pump assemblyWater pump assemblyReplacement1. Remove engine right bottom shield.
2. Discharge engine coolant.
3. Remove drive belt.Slowly turn drive belt tensioner clockwise to loosen the belt;
then remove drive belt and put back drive belt tensioner slowly
to completely loosen the tensioner.4. Remove alternator assembly.(a) Remove rubber cover and nuts.
(b) Uncouple alternator joint.
(c) Remove 2 bolts and alternator.5. Remove water pump assembly.Remove 6 bolts, water pump and o-ring.69
Page 81 of 419
Cooling - Water pump assembly6. Install water pump assembly.(a) Install new o-ring on water pump.
(b) Install water pump with 6 bolts.
Torque: bolt A: Bolt B: 7. Install alternator mounting components.Torque: 12mm bolt head: 14mm bolt head: 8. Refill engine coolant.
9. Check there is leakage with coolant.
70
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Cooling - Temperature regulator componentsReplacement1. Remove engine right bottom shield.
2. Discharge engine coolant.
3. Remove drive belt.Slowly turn drive belt tensioner clockwise to loosen the belt;
then remove drive belt and put back the tensioner slowly to
completely loosen it.4. Remove alternator components.(a) Remove rubber cover and nuts.
(b) Uncouple alternator joint.
(c) Remove 2 bolts and alternator.5. Remove water inlet pipe.
6. Remove temperature regulator.
7. Install temperature regulator.(a) Install new gasket to temperature regulator.
(b) As shown in the diagram, install temperature regulator with
inching valve toward upward.8. Install water inlet pipe and joint.Torque: 9. Install alternator installation components.Torque: 12mm bolt head: m
14mm bolt head: 10. Refill engine coolant.
11. Check there is leakage with coolant.
71Temperature regulator components
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Cooling - Radiator with electronic fan assemblyRadiator with electronic fan assemblyReplacement1. Discharge coolant (see Page 73).
2. Disassemble radiator water inlet hose [64000062].
3. Disassemble radiator water outlet hose [64000063].
4. Disassemble No.1 oil cooler inlet pipe (auto gear).
5. Disassemble No.1 oil cooler outlet pipe (auto gear).
6. Disassemble fixing clips of 2 wire harnesses from fan cover.
7. Remove mounting bracket assembly on radiator [64000058].
8. Remove radiator together with electronic fan assembly [64000057].
9. Remove electronic fan together with fan cover assembly [64000060].(a) Screw off fixed nuts connecting electronic fan together with fan cover assembly with radiator.
(b) Uncouple fan motor joint.
(c) Remove 2 bolts of fan.
(d) Remove fan motor at the same time.10. Replace and install as sequences opposite to the above.
11. Refill engine coolant (see Page 73).
12. Check there is leakage with coolant (see Page 66).
72
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CoolantReplacement1. Discharge engine coolant.Warning: when the temperature of engine and radiator is high, do not remove radiator cap to
avoid being scalded, because coolant and steam will spurt under high pressure.
(a) Remove radiator cap.
(b) Open radiator drain valve and engine drain valve.Cooling - Coolant2. Refill engine coolant.(a) Lock 2 drain valves and pour coolant into radiator until it is full.
Hints:Press radiator water inlet hose and outlet hose with hands several times.If coolant level is too low, please refill coolant again.
(b) Screw down radiator cap.
(c) Pour coolant into expansion tank until the level is up to “FULL” mark line.
(d) Run engine with vehicle warning up until thermostat valve is opened.
Hint:During vehicle warning up, press radiator water inlet hose and outlet hose with hands
several times.
(e) Engine flames out until coolant temperature falls to “cold”. Then open radiator cap and check coolant
level.
(f) If coolant level is too low, please perform the above steps again.
(g) If coolant level is not too low, please adjust expansion tank coolant level.3. Check there is leakage with coolant.(a) Refill engine coolant to radiator, and install radiator cap tester.
(b) Pressurize radiator to 118kPa, and check there is leakage.73Engine drain valve
Radiator drain valve Radiator cap
Drain pipe