Mitsubishi Outlander (2013+). Manual - part 335

TROUBLESHOOTING

ENGINE COOLING

14-6

• Malfunction of fusible link SBF4.

• Malfunction of radiator fan relay.

• Malfunction of condenser fan relay.

• Malfunction of fan control relay.

• Malfunction of radiator fan motor.

• Malfunction of condenser fan motor.

• Malfunction of engine compartment relay box.

• Malfunction of ETACS-ECU.

• Malfunction of engine-ECU.

DIAGNOSIS PROCEDURE

CAUTION

• If there is any problem in the CAN bus lines, 

an incorrect diagnosis code may be set. Prior 
to this diagnosis, diagnose the CAN bus 
lines.

• Before replacing the ECU, ensure that the 

CAN bus lines is normal.

STEP 1. Check the CAN bus system diagnosis.
Using M.U.T.-III, perform CAN bus diagnosis (Refer 
to GROUP 54C 

− Explanation About The M.U.T-III 

CAN Bus Diagnostics ).

Q: Is the check result satisfactory?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54C 

− Troubleshooting, CAN Bus 

Diagnostic Table ). Then go to Step 23.

STEP 2. Check the MPI system actuator test.
Using M.U.T.-III to check the MPI system actuator 
test (Refer to GROUP 13A 

− Troubleshooting, Actua-

tor Test Reference Table ).

• Item 14: Cooling fan motor

Q: Is the check result normal?

YES : 

Go to Step 22.

NO : 

Go to Step 3.

STEP 3. Check the MPI system diagnosis code.
Using M.U.T.-III, perform MPI system diagnosis code 
(Refer to GROUP 13A 

− Troubleshooting, Diagnosis 

Function ).

Q: Is any diagnosis code set?

YES : 

Repair the MPI system (Refer to GROUP 

13A 

− Troubleshooting, Inspection Chart for 

Diagnosis Code ). Then go to Step 23.

NO : 

Go to Step 5 <M/T>.

NO : 

Go to Step 4 <CVT>.

STEP 4. Check the CVT system diagnosis code .
Using M.U.T.-III, perform CVT system diagnosis 
code (Refer to GROUP 23A 

− Troubleshooting, Diag-

nosis Function ).

Q: Is any diagnosis code set?

YES : 

Repair the CVT system (Refer to GROUP 

23A 

− Troubleshooting, Diagnosis Code 

Chart ). Then go to Step 23.

NO : 

Go to Step 5.

STEP 5. Check the A/C system diagnosis code.
Using M.U.T.-III, perform A/C system diagnosis code 
(Refer to GROUP 55 

− Troubleshooting, Diagnosis 

Function ).

Q: Is any diagnosis code set?

YES : 

Repair the A/C system (Refer to GROUP 55 

− Troubleshooting, Diagnosis Code Chart ). 
Then go to Step 23.

NO : 

Go to Step 6.

STEP 6. Check the ETACS system diagnosis 
code.
Using M.U.T.-III, perform ETACS system diagnosis 
code (Refer to GROUP 54A 

− ETACS, Troubleshoot-

ing, Diagnosis Function ).

Q: Is any diagnosis code set?

YES : 

Repair the ETACS system (Refer to 

GROUP 54A 

− ETACS, Troubleshooting, 

Diagnosis Code Chart ). Then go to Step 23.

NO : 

Go to Step 7.

STEP 7. Measure the terminal voltage at 
ETACS-ECU connector. 
(1) Disconnect the ETACS-ECU connector and 

measure at the harness connector side.

(2) Measure the terminal voltage between terminal 

F/LO and earth, between terminal F/HI and earth.

OK: System voltage.

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Go to Step 8.

STEP 8. Connectors check: condenser fan relay 
connector, radiator fan relay connector, fan 
control relay connector, and ETACS-ECU 
connector. 

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair or replace the damaged connector or 
replace the relay box. Then go to Step 23 .

TROUBLESHOOTING

ENGINE COOLING

14-7

STEP 9. Check the harness wire between 
condenser fan relay connector and ETACS-ECU 
connector terminal F/HI, between radiator fan 
relay connector and ETACS-ECU connector 
terminal F/LO, and between fan control relay 
connector and condenser fan connector.

• Check harness wire for open/short circuit and 

damage.

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Repair or replace the damaged harness 
wire. Then go to Step 23.

STEP 10. Check the harness wire between fusible 
link SBF3 and condenser fan relay connector, 
between fusible link SBF3 and fan control relay 
connector, and between fusible link SBF4 and 
radiator fan relay connector.

• Check harness wire for open/short circuit and 

damage.

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair or replace the damaged harness 
wire. Then go to Step 23.

STEP 11. Check the radiator fan relay, the 
condenser fan relay, and the fan control relay. 
Refer to 

P.14-11

.

Q: Is the check result normal?

YES : 

Go to Step 12.

NO : 

Replace the damaged relay (Refer to 

P.14-10

). Then go to Step 23.

STEP 12. Check the fusible link SBF3 and SBF4. 

Q: Is the check result normal?

YES : 

Go to Step 20.

NO : 

Replace the damaged fusible link. Then go 
to Step 23.

STEP 13. Connectors check: condenser fan relay 
connector, radiator fan relay connector, fan 
control relay connector, radiator fan motor 
connector, and condenser fan motor connector. 

Q: Is the check result normal?

YES : 

Go to Step 14.

NO : 

Repair or replace the damaged connector or 
replace the relay box. Then go to Step 23 .

STEP 14. Check the harness wire between 
condenser fan relay connector and condenser 
fan motor connector, and between condenser fan 
motor connector and earth.

• Check harness wire for open/short circuit and 

damage.

Q: Is the check result normal?

YES : 

Go to Step 15.

NO : 

Repair or replace the damaged harness 
wire. Then go to Step 23.

STEP 15. Check the harness wire between 
radiator fan relay connector and radiator fan 
motor connector, and between radiator fan motor 
connector and fan control relay connector.

• Check harness wire for open/short circuit and 

damage.

Q: Is the check result normal?

YES : 

Go to Step 16.

NO : 

Repair or replace the damaged harness 
wire. Then go to Step 23.

STEP 16. Check the harness wire between fan 
control relay connector and condenser fan relay 
connector, and between fan control relay 
connector and earth.

• Check harness wire for open/short circuit and 

damage.

Q: Is the check result normal?

YES : 

Go to Step 17.

NO : 

Repair or replace the damaged harness 
wire. Then go to Step 23.

STEP 17. Check the harness wire between fusible 
link SBF3 and condenser fan relay connector, 
and between fusible link SBF4 and radiator fan 
relay connector.

• Check harness wire for open/short circuit and 

damage.

Q: Is the check result normal?

YES : 

Go to Step 18.

NO : 

Repair or replace the damaged harness 
wire. Then go to Step 23.

STEP 18. Check the radiator fan relay, the 
condenser fan relay, and the fan control relay.
Refer to 

P.14-11

.

Q: Is the check result normal?

YES : 

Go to Step 19.

NO : 

Replace the damaged relay (Refer to 

P.14-10

). Then go to Step 23.

ON-VEHICLE SERVICE

ENGINE COOLING

14-8

STEP 19. Check the radiator fan motor and the 
condenser fan motor. 
Refer to 

P.14-12

.

Q: Is the check result normal?

YES : 

Go to Step 20.

NO : 

Replace the damaged fan motor (Refer to 

P.14-19

). Then go to Step 23.

STEP 20. Check the ETACS system diagnosis 
code.
Using M.U.T.-III, perform ETACS system diagnosis 
code (Refer to GROUP 54A 

− ETACS, Troubleshoot-

ing, Diagnosis Function ).

Q: Is any diagnosis code set?

YES : 

Replace the ETACS-ECU (Refer to GROUP 

54A 

− ETACS, ETACS-ECU ). Then go to 

Step 23.

NO : 

Go to Step 21.

STEP 21. Check the MPI system actuator test.
Using M.U.T.-III, check the MPI system actuator test 
(Refer to GROUP 13A 

− Troubleshooting, Actuator 

Test Reference Table ).

• Item 14: Cooling fan motor.

Q: Is the check result normal?

YES : 

Go to Step 22.

NO : 

Replace the engine-ECU (Refer to GROUP 
13A 

− Engine-ECU ). Then go to Step 23.

STEP 22. Check the symptoms.

Q: Does the radiator fan and condenser fan operate 

normal?
YES : 

It can be assumed that this malfunction is 

intermittent (Refer to GROUP 00 

− How to 

Use Troubleshooting/Inspection Service 
Points, How to Cope with Intermittent 
Malfunction ).

NO : 

Replace the engine-ECU (Refer to GROUP 
13A 

− Engine-ECU ). Then go to Step 23.

STEP 23. Check the symptoms.

Q: Does the radiator fan and condenser fan operate 

normal?
YES : 

The procedure is complete.

NO : 

Return to Step 1.

ON-VEHICLE SERVICE

ENGINE COOLANT LEAK CHECK 

M1141001001240

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 mois-

ture from the places checked.

• When the tester is taken out, be careful not to 

spill any coolant.

•

ACX01844

Cap adapter

Adapter

AC

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

M1141001301445

NOTE: Be sure that the cap is clean before test-

ing. Rust or other foreign material on the cap seal 
will cause an improper reading.

AC211643 AB

Cap adapter

ON-VEHICLE SERVICE

ENGINE COOLING

14-9

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

M1141001202991

1. Remove the front under cover panel (Refer to 

GROUP 51 

− Under Cover − Removal and 

Installation ).

WARNING

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

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

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

AC612051AB

Exhaust side

3. Drain the water in the water jacket by unplugging 

the drain plug of the cylinder block.

4. Remove the radiator condenser tank and drain 

the coolant.

AC611991AB

Cylinder block
drain plug

Gasket

5. Replace the cylinder block drain plug gasket, and 

tighten the drain plug to the specified torque.

Tightening torque: 39 

± 3 N⋅m 

6. Securely tighten the radiator drain plug.

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.

ACB05863

MB991871

Air hose

AB

8. Use special tool LLC changer (MB991871) to refill 

the engine coolant up to the top of the radiator 
port.

Recommended antifreeze: DIA QUEEN SUPER 

LONG LIFE COOLANT PREMIUM or equiva-
lent*

NOTE: *similar high quality ethylene glycol 

based non-silicate, non-amine, non-nitrate 
and non-borate coolant with long life hybrid 
organic acid technology.

Quantity: Approximately 7.5 L
(including 0.65 L in the radiator condenser 

tank)

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 "FULL" line.