Mitsubishi Lancer Evolution X. Manual - part 466

ON-VEHICLE SERVICE

TSB Revision

ENGINE COOLING

14-19

17.Remove the radiator cap with the engine cool, and then refill 

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

18.Tighten the radiator cap securely.

CAUTION

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

engine coolant up to the "FULL" line.

20.Install the turbocharger compressor bracket. (Refer to 

GROUP 15, Exhaust Manifold and Turbocharger Assembly 

P.15-18

)

21.Install the air cleaner intake hose. (Refer to GROUP 15, Air 

Cleaner 

P.15-11

)

22.Remove the engine room under cover front B and engine 

room under cover front A (RH). (Refer to GROUP 51, Under 
Cover 

P.51-15

)

WATER PUMP COOLANT LEAK CHECK

M1141008600080

If a residue of the coolant draining is found on the drain hole, 
the vapor hole and the installation surface, check the water 
pump leakage by following method.
1. Wipe off the residue of the coolant draining on the water 

pump.

WARNING

Make sure that the coolant is cold when removing the 
radiator cap.

2. Remove the radiator cap.

CAUTION

Do not pressures 100 kPa (15 psi) or more.
3. Install the radiator tester and pressures at 100 kPa (15 psi).
4. Hold the pressurized state for 20 minutes, and check that 

the water leakage from the drain hole, the vapor hole or the 
installation surface of the water pump.

5. Remove the radiator tester, and install the radiator cap.
6. Warm up the engine, let it idle for 20 minutes and stop it.
7. After stopping the engine, and check that the water leakage 

from the drain hole, the vapor hole or the installation surface 
of the water pump.

8. If the water leakage is found in step 4 or 7, replace the water 

pump. (Refer to 

P.14-26

.)

ENGINE COOLANT CONCENTRATION TEST

M1141001101009

Refer to GROUP 00 − Recommended Lubricants and Lubricant 

Capacities Table 

P.00-54

.

ACX01844AE

Cap adapter

Adapter

ON-VEHICLE SERVICE

TSB Revision

ENGINE COOLING

14-20

COOLING FAN RELAY CONTINUITY CHECK

M1141006201409

.

RADIATOR FAN RELAY CHECK

.

CONDENSER FAN RELAY CHECK

.

Battery voltage Terminal No. to 

be connected 
to tester

Continuity test 
results

Not applied

2 − 4

Open circuit

Connect 
terminal No. 3 
and battery (+) 
terminal.
Connect 
terminal No. 1 
and battery (−) 

terminal.

Continuity (Less 
than 2 ohms)

1

3

4

2

4

2

3

1

AC707028

AC705490

AC

Radiator fan relay

Battery voltage Terminal No. to 

be connected 
to tester

Continuity test 
results

Not applied

2 − 4

Open circuit

Connect 
terminal No.3 
and battery (+) 
terminal.
Connect 
terminal No.1 
and battery (−) 

terminal.

Continuity (Less 
than 2 ohms)

1

3

4

2

4

2

3

1

AC804975

AC705490

Condenser fan relay

AB

ON-VEHICLE SERVICE

TSB Revision

ENGINE COOLING

14-21

FAN CONTROL RELAY CHECK

COOLING FAN MOTOR CHECK

M1141007600225

1. Disconnect the fan motor connector.

Battery voltage Terminal No. to 

be connected 
to tester

Continuity test 
results

Not applied

2 − 4

Continuity (Less 
than 2 ohms)

2 − 5

Open circuit

Connect 
terminal No. 1 
and battery (+) 
terminal.
Connect 
terminal No. 3 
and battery (−) 

terminal.

2 − 5

Continuity (Less 
than 2 ohms)

2 − 4

Open circuit

1

3

4

2

AC707030

5

1

3

2

5

4

AC705490

AC

Fan control relay

AC706502AC

Condenser fan 
motor connector

Radiator fan 
motor connector

ON-VEHICLE SERVICE

TSB Revision

ENGINE COOLING

14-22

2. Check that the fan motor runs when a positive battery 

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

3. If the fan motor is defective, replace it (Refer to 

P.14-32

).

AC706893AC

Condenser fan 
motor connector

AC706894AC

Radiator fan 
motor connector