Mitsubishi Lancer Evolution IX. Manual — part 654

14-1

GROUP 14

ENGINE COOLING

CONTENTS

GENERAL INFORMATION . . . . . . . .

14-2

SERVICE SPECIFICATIONS. . . . . . .

14-2

LUBRICANT. . . . . . . . . . . . . . . . . . . .

14-2

SEALANT. . . . . . . . . . . . . . . . . . . . . .

14-2

SPECIAL TOOLS. . . . . . . . . . . . . . . .

14-3

TROUBLESHOOTING . . . . . . . . . . . .

14-3

ON-VEHICLE SERVICE. . . . . . . . . . .

14-15

ENGINE COOLANT LEAK CHECK . . . . . .

14-15

RADIATOR CAP PRESSURE CHECK. . . .

14-15

ENGINE COOLANT REPLACEMENT . . . .

14-15

CONCENTRATION MEASUREMENT . . . .

14-16

FAN CONTROLLER CHECK . . . . . . . . . . .

14-16

FAN CONTROL RELAY CONTINUITY

CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14-17

COOLING FAN MOTOR CHECK . . . . . . . .

14-17

THERMOSTAT . . . . . . . . . . . . . . . . . .

14-18

REMOVAL AND INSTALLATION . . . . . . . .

14-18

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .

14-19

WATER PUMP . . . . . . . . . . . . . . . . . .

14-20

REMOVAL AND INSTALLATION . . . . . . . .

14-20

WATER HOSE AND WATER PIPE . .

14-22

REMOVAL AND INSTALLATION . . . . . . . .

14-22

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .

14-23

RADIATOR . . . . . . . . . . . . . . . . . . . . .

14-24

REMOVAL AND INSTALLATION . . . . . . . .

14-24

GENERAL INFORMATION

ENGINE COOLING

14-2

GENERAL INFORMATION

M1141000100456

The cooling system is designed to keep every part of
the engine at appropriate temperature in whatever
condition the engine may be operated. The cooling
method is of the water-cooled, pressure forced circu-
lation type in which the water pump pressurizes cool-
ant and circulates it throughout the engine. If the
engine coolant temperature exceeds the prescribed
temperature, the thermostat opens to circulate the

coolant through the radiator as well so that the heat
absorbed by the coolant may be radiated into the air.
The water pump is of the centrifugal type and is
driven by the drive belt from the crankshaft. The radi-
ator is the corrugated fin, down flow type. The cool-
ing fan is controlled by the fan controller and
engine-ECU depend on driving conditions.

Item

Specification

Radiator

Performance kJ/h

216,700

SERVICE SPECIFICATIONS

M1141000300483

Item

Standard value

Limit

Radiator cap pressure kPa

93

− 123

Minimum 83

Range of coolant antifreeze concentration of radiator %

30

− 60

-

Fan controller input voltage V

Ignition switch: "ON"

Battery positive voltage

-

Fan controller output voltage V

A/C switch: "OFF"

1 or less

-

A/C switch: "ON"

Repeat steps 1) and 2).
1) 8.2

± 2.6

2) Battery positive voltage
± 2.6

-

Thermostat

Valve opening temperature of thermostat

°C

80

± 1.5

-

Full-opening temperature of thermostat

°C

93

-

Valve lift mm

9.5 or more

-

LUBRICANT

M1141000400424

Item

Specified lubricant

Quantity L

Engine coolant (including
reserve tank)

DIA QUEEN SUPER LONG LIFE COOLANT or equivalent

6.0

SEALANT

M1141000500658

Item

Specified sealant

Remark

Cylinder block drain plug

3M Nut Locking Part No.4171 or equivalent

Drying sealant

SPECIAL TOOLS

ENGINE COOLING

14-3

SPECIAL TOOLS

M1141000600592

Tool

Number

Name

Use

MB991223

A

D

C

B

AZ

DO NOT USE

MB991223

A: MB991219
B: MB991220
C: MB991221
D: MB991222

Harness set

A: Check harness
B: LED harness
C: LED harness

adapter

D: Probe

Making voltage and
resistance measurement
during troubleshooting

A: Connector pin contact

pressure inspection

B: Power circuit inspection
C: Power circuit inspection
D: Commercial tester

connection

MB992006

MB992006

Extra fine probe

Making voltage and
resistance measurement
during troubleshooting

MB991871

MB991871

LLC changer

Coolant refilling

TROUBLESHOOTING

INSPECTION CHART FOR TROUBLE
SYMPTOMS

M1141005600434

Trouble symptom

Inspection
procedure No.

Reference page

Cooling fan does not operate

1

P.14-4

Cooling fan does not change speed or does not stop

2

P.14-10

TROUBLESHOOTING

ENGINE COOLING

14-4

INSPECTION PROCEDURE FOR
TROUBLE SYMPTOMS

INSPECTION PROCEDURE 1: Cooling fan does not operate

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple

INPUT SIGNAL

· A/C SWITCH
· ENGINE
COOLANT
TEMPERATURE
SENSOR

· VEHICLE SPEED
SENSOR

ENGINE-
ECU

ENGINE
CONTROL
RELAY

SMOOTHING
CIRCUIT

FIELD EFFECT
TRANSISTOR
CIRCUIT

INPUT SIGNAL
PROCESSING

DRIVE
CIRCUIT

TEMPERATURE
DETECTION

CURRENT
DETECTION

RADIATOR
FAN
MOTOR

FAN CONTROLLER

ENGINE
CONTROL
SYSTEM

FUSIBLE
LINK

2

FAN
CONTROL
RELAY

AC505138

Cooling fan drive circuit <L.H. drive vehicles>

AB