Mitsubishi Colt Ralliart. Manual — part 106

ON-VEHICLE SERVICE

ENGINE COOLING

14-6

11.Turn the A/C switch to OFF position to start the

engine and warm up until the cooling fan
operates.
NOTE: This work is to open the thermostat fully.

12.Rev the engine several times and then stop it.

Check that there are no coolant leaks.

13.Remove the radiator cap with the engine cool,

and then refill the engine coolant up to the top of
the radiator port.

14.Tighten the radiator cap securely.

CAUTION

Do not overfill the radiator condenser tank.
15.Remove the radiator condenser tank cap, and

add the engine coolant up to the "F" line of the
level gauge.

ENGINE COOLANT REPLACEMENT
<4G1>

M1141001200757

WARNING

When removing the radiator cap, use care to
avoid contact with hot coolant or steam.
Place a shop towel over the cap and turn the
cap anti-clockwise a little to let the pressure
escape through the vinyl tube. After relieving
the steam pressure, remove the cap by
slowly turning it anti-clockwise.

1. Drain the water from the radiator, heater core and

engine after unplugging the radiator drain plug
and removing the radiator cap.

AC402236AB

Cylinder block
drain plug

Water pump
inlet pipe

2. Drain the water in the water jacket by unplugging

the drain plug of the cylinder block.

3. Remove the radiator condenser tank and drain

the coolant.

4. Drain the coolant then clean the path of the

coolant by injecting water into the radiator from
the radiator cap area.

AC104528AB

Cylinder block
drain plug

5. Apply the designated sealant to the screw area of

the cylinder block drain plug, and then tighten to
the specified torque.
Specified sealant: 3M Nut Locking Part

No.4171 or equivalent

Tightening torque: 40

± 5 N⋅m

6. Securely tighten the drain plug of the radiator.
7. Reinstall the radiator condenser tank.

CAUTION

Do not use alcohol or methanol anti-freeze or any
engine coolants mixed with alcohol or methanol
anti-freeze. The use of an improper anti-freeze
can cause corrosion of the aluminium compo-
nents.

AC402237AB

MB991871

Air hose

8. By referring to the section on coolant, select an

appropriate concentration for safe operating
temperature within the range of 30 to 60%. Use
the special tool LLC changer (MB991871) to refill
the engine coolant up to the top of the radiator
port. A convenient mixture is a 50% water and
50% antifreeze solution (freezing point:

−31°C).

Recommended antifreeze: DIA QUEEN SUPER

LONG LIFE COOLANT or equivalent

Quantity: 6.8 L
NOTE: For how to use special tool MB991871,
refer to its manufacturer’s instructions.

9. Tighten the radiator cap securely.
10.Remove the radiator condenser tank cap, and

add the engine coolant up to the "F" line of the
level gauge.

Main

Index

Group

TOC

ON-VEHICLE SERVICE

ENGINE COOLING

14-7

11.Turn the A/C switch to OFF position to start the

engine and warm up until the cooling fan
operates.
NOTE: This work is to open the thermostat fully.

12.Rev the engine several times and then stop it.

Check that there are no coolant leaks.

13.Remove the radiator cap with the engine cool,

and then refill the engine coolant up to the top of
the radiator port.

14.Tighten the radiator cap securely.

CAUTION

Do not overfill the radiator condenser tank.
15.Remove the radiator condenser tank cap, and

add the engine coolant up to the "F" line of the
level gauge.

CONCENTRATION MEASUREMENT

M1141001100619

Measure the temperature and specific gravity of the
engine coolant to check the antifreeze concentration.

Standard value: 30

− 60% (allowable concentra-

tion range)

Recommended antifreeze: DIAQUEEN SUPER

LONG LIFE COOLANT or equivalent

CAUTION

If the concentration of the anti-freeze is below
30%, the anti-corrosion property will be
adversely affected. In addition, if the concentra-
tion is above 60%, both the anti-freezing and
engine cooling properties will decrease, affecting
the engine adversely. For these reasons, be sure
to maintain the concentration level within the
specified range.

COOLING FAN CONTROL RELAY
REPLACEMENT

M1141007200089

AC205483

AB

CAUTION

Basically, remove or install the cooling fan con-
trol relay by hand. If the centre of relay has been
pinched by pliers, it can be damaged.

AC302107 AB

A

1. Remove the cooling fan control relay by hand. If it

cannot be removed by hand, pinch the part A
shown with long-nose pliers and remove the relay.

2. Install the new relay by hand.

Main

Index

Group

TOC

ON-VEHICLE SERVICE

ENGINE COOLING

14-8

COOLING FAN CONTROL RELAY
CONTINUITY CHECK

M1141006200462

AC402819

J/B

AB

Cooling fan
control relay
(HI) <4G1>

Cooling fan control
relay <4A9> or
cooling fan control
relay (LO) <4G1>

Instrument panel

CAUTION

Ensure the correct polarity to prevent the dam-
age to a diode.

Battery
voltage

Terminal No. to
be connected to
tester

Continuity test
results

Not applied 3

− 4

Open circuit

Connect
terminal
No.1 and
battery (+)
terminal.
Connect
terminal
No.2 and
battery (

−)

terminal.

3

− 4

Continuity (less
than 2

Ω )

COOLING FAN MOTOR CHECK <4A9>

M1141001900217

AC402287AB

Cooling fan
motor

1. Remove the cooling fan motor connector.

1

2

AC402288

AB

Cooling fan
motor

2. Check that the cooling fan motor runs when a

positive battery terminal is connected to the
cooling fan motor-side connector terminal No.1,
and terminal No.2 is earthed. Also check to see
that there is no abnormal sound emitted from the
cooling fan motor at this time.

3. If the cooling fan motor is defective, replace it

(Refer to

P.14-22

).

Main

Index

Group

TOC

ON-VEHICLE SERVICE

ENGINE COOLING

14-9

COOLING FAN MOTOR CHECK <4G1>

M1141001900228

AC402281AB

Cooling fan
motor

1. Remove the cooling fan motor connector.

1

2

3

4

AC402282

AB

Cooling fan
motor

2. Check that the cooling fan motor runs at low

speed when a positive battery terminal is
connected to the cooling fan motor-side connector
terminal No.1, and terminal Nos.2 and 4 are
earthed. Also check to see that there is no
abnormal sound emitted from the cooling fan
motor at this time.

1

2

3

4

AC402283

AB

Cooling fan
motor

3. Check that the cooling fan motor runs at high

speed when a positive battery terminal is
connected to the cooling fan motor-side connector
terminal Nos.1 and 3, and terminal Nos.2 and 4
are earthed. Also check to see that there is no
abnormal sound emitted from the cooling fan
motor at this time.

4. If the cooling fan motor is defective, replace it

(Refer to

P.14-22

).

Main

Index

Group

TOC