Mitsubishi Outlander (2003+). Manual — part 126

TROUBLESHOOTING

ENGINE COOLING

14-15

(7) Disconnect engine-ECU connector or

engine-A/T-ECU connector C-134 <4G63> or
C-139 <4G69>, and push in connector terminal
pin 21 <4G63> or 17 <4G69> to disconnect
connector.

(8) Reconnect the connector with connector terminal

pin still installed.

Q: Does the cooling fan rotate? And when the

connector terminal pin is connected to the body
earth, does the cooling fan stop?

YES :

Go to Step 7.

NO :

Replace the fan controller (Refer to

P.14-29

). Then go to Step 8.

STEP 7. MUT-II/III self-diag code

Check if an MPI system self-diag code is set. (Refer
to GROUP 13A - Trouble shooting

P.13A-9

) <4G63>

or (Refer to GROUP 13B - Trouble shooting

P.13B-10

) <4G69>.

Q: Diagnosis code set?

YES :

Inspection chart for diagnosis code (Refer

to GROUP 13A - Trouble shooting

P.13A-16

) <4G63> or Inspection chart for

diagnosis code (Refer to GROUP 13B -
Trouble shooting

P.13B-20

) <4G69>.

NO :

Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T> (Refer to GROUP
13A

P.13A-343

) <4G63> or (Refer to

GROUP 13B, Engine-ECU and
Engine-A/T-ECU

P.13B-439

) <4G69>. Then

go to Step 8.

STEP 8. Check the symptoms.

Q: Does the radiator fan motor and the condenser fan

motor operate correctly?

YES :

This symptoms is complete.

NO :

Return to Step 1.

INSPECTION PROCEDURE 3: Radiator Fan does not Operate

Radiator Fan and Condenser Fan Drive Circuit
Refer to

P.14-4

.

TECHNICAL DESCRIPTION
The cause could be a malfunction of the radiator fan
motor or an open circuit between the fan controller
and the radiator fan motor.

TROUBLESHOOTING HINTS
Malfunction of radiator fan motor

DIAGNOSIS

STEP 1. Check the radiator fan motor.

Refer to

P.14-20

.

Q: Is the radiator fan motor in good condition?

YES :

Go to Step 2.

NO :

Replace the radiator fan motor (Refer to

P.14-29

). Then go to Step 3.

STEP 2. Check the fan controller.

Refer to

P.14-18

.

Q: Is the fan controller in good condition?

YES :

Go to Step 3.

NO :

Replace the fan controller (Refer to

P.14-29

). Then go to Step 3.

STEP 3. Check the symptoms.

Q: Do the radiator fan operate?

YES :

This symptoms is complete.

NO :

Return to Step 1.

TROUBLESHOOTING

ENGINE COOLING

14-16

INSPECTION PROCEDURE 4: Condenser Fan does not Operate

Radiator Fan and Condenser Fan Drive Circuit
Refer to

P.14-4

.

TECHNICAL DESCRIPTION
The cause could be a malfunction of the condenser
fan motor or fan controller.

TROUBLESHOOTING HINTS

•

Malfunction of condenser fan motor

•

Malfunction of fan controller

DIAGNOSIS

STEP 1. Check the condenser fan motor.

Condenser fan motor check. (Refer to GROUP 55,
Condenser and Condenser Fan Motor

P.55A-76

).

Q: Is the condenser fan motor in good condition?

YES :

Go to Step 2.

NO :

Replace the condenser fan motor, then go
to Step 3.

STEP 2. Check the fan controller.

Refer to

P.14-18

.

Q: Is the fan controller in good condition?

YES :

Go to Step 3.

NO :

Replace the fan controller (Refer to

P.14-29

). Then go to Step 3.

STEP 3. Check the symptoms.

Q: Do the condenser fan operate?

YES :

This symptoms is complete.

NO :

Return to Step 1.

ON-VEHICLE SERVICE

ENGINE COOLING

14-17

ON-VEHICLE SERVICE

ENGINE COOLANT LEAK CHECK

M1141001000355

WARNING

When pressure testing the cooling system,
slowly release cooling system pressure to
avoid getting burned by hot coolant.

CAUTION

•

Be sure to completely clean away any
moisture from the places checked.

•

When the tester is taken out, be careful not to
spill any coolant.

•

Be careful when installing and removing the
tester and when testing not to deform the
filler neck of the radiator.

1. Check that the coolant level is up to the filler neck.

Install a radiator tester and apply 160 kPa
pressure, and then check for leakage from the
radiator hose or connections.

2. If there is leakage, repair or replace the

appropriate part.

RADIATOR CAP VALVE OPENING
PRESSURE CHECK

M1141001300431

NOTE: Be sure that the cap is clean before
testing. Rust or other foreign material on the cap
seal will cause an improper reading.

1. Use a cap adapter to attach the cap to the tester.

2. Increase the pressure until the indicator of the

gauge stops moving.
Minimum limit: 83 kPa
Standard value: 93

−

123 kPa

3. Replace the radiator cap if the reading does not

remain at or above the limit.

ENGINE COOLANT REPLACEMENT

M1141001200520

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 counterclockwise a little to let the
pressure escape through the vinyl tube.
After relieving the steam pressure, remove
the cap by slowly turning it
counterclockwise.

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

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

2. Drain the water in the water jacket by unplugging

the drain plug of the cylinder block. On 4WD,
drain engine coolant from the water return tube
assembly of the transfer.

3. Remove the reserve tank and drain the coolant.

ACX01844

Cap adapter

Adapter

AC

AC211643 AB

Cap adapter

AC200630AD

<2WD>

Cylinder block
drain plug

Intake manifold

AC301654

Water return tube assembly

30 ± 3 N·m

<4WD>

AC

ON-VEHICLE SERVICE

ENGINE COOLING

14-18

4. Drain the coolant then clean the path of the

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

5. Apply the designated sealant to the screw area of

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

No.4171 or equivalent

Tightening torque: 44

±

5 N

⋅

m

6. Securely tighten the drain plug of the radiator.
7. Assemble the reserve 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
components.

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

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

−

31

°

C).

Recommended antifreeze: DIAQUEEN SUPER

LONG LIFE COOLANT or equivalent

Quantity: 7.0 L
NOTE: For how to use special tool MB991871,
refer to its manufacturer’s instructions.

9. Reinstall the radiator cap.
10.Start the engine and let it warm up until the

thermostat opens.

11.After repeatedly revving the engine up to 3,000

r/min several times, then stop the engine.

12.Remove the radiator cap after the engine has

become cold, and pour in coolant up to the brim.
Reinstall the cap.

CAUTION

Do not overfill the reserve tank.
13.Add coolant to the reserve tank between the

"FULL" and "LOW" mark if necessary.

CONCENTRATION MEASUREMENT

M1141001100426

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

Standard value: 30

−

60 % (allowable

concentration 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 concentration 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.

FAN CONTROLLER CHECK

M1141007400083

1. Remove the fan controller connector.
2. Turn the ignition switch to the "ON" position, and

measure the voltage between the harness-side
connector terminals.

Standard value: System voltage

AC304677

Cylinder block
drain plug

AE

AC200579AC

MB991871

Air hose

AC103011

2

3

1

Fan controller

AD