2006 MITSUBISHI LANCER control

TROUBLESHOOTING
ENGINE COOLING14-20
INSPECTION PROCEDURE 4: Cooling Fan (R.H.) <4G1> or A/C Condenser Fan <4G6> does not
Operate {When Cooling Fan (L.H.) Operate}
COOLING FAN (L.H.) AND COOLING FAN
(R.H.) OR A/C CONDENSER FAN DRIVE
CIRCUIT
Refer to P.14-6.
CIRCUIT OPERATION
Refer to P.14-6.
TECHNICAL DESCRIPTION
The cause could be a malfunction of the cooling fan
motor (R.H.) <4G1> or A/C condenser fan motor
<4G6> or cooling fan motor drive control unit.
TROUBLESHOOTING HINTS
•Malfunction of cooling fan motor (R.H.) <4G1> or
A/C condenser fan motor <4G6>
•Malfunction of cooling fan motor drive control unit
DIAGNOSIS
STEP 1. Check the cooling fan motor (R.H.)
<4G1> or A/C condenser fan motor <4G6>.
Cooling fan motor (R.H.) check. (Refer to P.14-24)
<4G1>.
A/C condenser fan motor check. (Refer to GROUP
55
P.55A-91) <4G6>.
Q: Is the cooling fan motor (R.H.) <4G1> or A/C
condenser fan motor <4G6> in good condition?
YES : Go to Step 2 .
NO : Replace the cooling fan motor (R.H.) (Refer
to
P.14-33) <4G1> or A/C condenser fan
motor (Refer to GROUP 55 P.55A-90)
<4G6>. Then go to Step 3 .
STEP 2. Check the cooling fan motor drive
control unit.
Refer to P.14-22.
Q: Is the cooling fan motor drive control unit in good
condition?
YES : Go to Step 3 .
NO : Replace the cooling fan motor drive control
unit (Refer to
P.14-33) <4G1> (Refer to
P.14-35) <4G6>. Then go to Step 3 .
STEP 3. Check the symptoms.
Q: Do the cooling fan (R.H.) <4G1> or A/C condenser
fan <4G6> operate (when the cooling fan (L.H.)
operate)?
YES : This symptoms is complete.
NO : Return to Step 1 .

AC200625
Cylinder block
drain plug
AC
ON-VEHICLE SER VICE
ENGINE COOLING14-22
5.App l y the designa ted sealant to t he scre w area of
th e cylin der block drain plu g , and then tighten to
th e st and ard torq ue.
Sp e c ified s ealant: 3 M Nut Loc king Part
No. 4171 o r e quivale n t
Ti ghtenin g torque:
40 ± 5 N⋅m <4G1>
44 ± 5 N⋅m <4G6>
6.Securely tighten t he drain plug of t he radiator .
7.Reinst all the ra diato r con denser t ank.
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.
AC303612AB
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
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:
5.0 L <4G1>
7.0 L <4G6>
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 radiator condenser tank.
13.Add coolant to the radiator condenser tank between the "F" and "L" mark if necessary.
CONCENTRATION MEASUREMENT
M1141001100352
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 MOTOR DRIVE CONTROL
UNIT CHECK
M1141006100250
1. Remove the cooling fan motor drive control unit connector.
AC103195
Y1716AU
1
23
AC
Cooling fan motor
drive control unit
2. Turn the ignition switch to the "ON" position, and
measure the voltage between terminal 1 and 3 at
the harness side connector.
Standard value: system voltage

ON-VEHICLE SERVICE
ENGINE COOLING14-23
3. Connect the cooling fan motor drive control unit connector, and disconnect the cooling fan motor
(L.H.) connector.
4. Ensure that the A/C switch is off, and start the engine and run it at idle.
AC303496AB
Cooling fan motor
drive control unit
5.Measure the volt ag e betwee n the cooling f an
motor d r ive cont rol un it side conne ctor t e rminal 1
an d 2.
St andard va lue: 1V or le ss
WARNING
Stay clear of the fan when the fan starts run-
ning.
6. Turn the A/C switch to the "ON" position.
7. Measure the voltage between the cooling fan
motor drive control unit side connector terminal 1
and 2 while the fan is running. The voltage should
repeat the values below.
Standard value:
1. 1 V or less
2. 8.2 ± 0.7 V
3. System voltage ± 2.6 V
8. If the voltage does not repeatedly change as indicated, replace the cooling fan motor drive
control unit. (Refer to
P.14-33) <4G1> (Refer to
P.14-35) <4G6>.
FAN CONTROL RELAY CONTINUITY CHECK
M1141006200280
AC211776
13
4 2
3 4
1
2
AC301712
Fan control relay
AB
Battery
voltageTerminal No.to
be connected
to testerContinuity test
results
Not applied4 − 2Open circuit
Connect
terminal No.1
and battery (
−)
terminal.
Connect
terminal No.3
and battery (+)
terminal.
4 − 2Less than 2
ohms

THERMOSTAT
ENGINE COOLING14-24
COOLING FAN MOTOR CHECK
M1141007100220
1
2
AC303501AB
Cooling fan motor drive control unit
Cooling fan motor
(L.H.) connector
1
2
AC303502AB
Cooling fan motor
drive control unit
Cooling fan motor
(R.H.) connector
<4G1 with A/C>
1. Remove the cooling fa n mot o r co nnector .
2.Check t o see that t he co oling fan motor of the
ra diato r turns wh en ap plying b a ttery power
b e tween th e con nect o r terminal 1 and 2 of t he
cooling fa n mo tor . Also ch eck to see tha t there is
n o abno rmal soun d co min g from the cooling fa n
motor a t this time.
3.If the cooling fan moto r is defective, replace it.
(Refe r to
P.14-33) <4G1> (Refer to P.14-35)
<4G6>.
THERMOSTA T
REMOVA L AND INST ALLA TION
M1141 0024 0044 2
Pre-removal and Post-installation Operation
•Engine Coolant Draining and Refilling (Refer to P.14-21).
•Air Cleaner Assembly Removal and Installation (Refer to
GROUP 15
P.15-3).
•Battery Removal and Installation
AC203409AC
4
3
6
7
22 ± 4 N·m
<4G1>

AC301429
1
2 36
7
13 ± 2 N·m
AD
5
<4G6>
Removal steps
1.Water temperature gauge unit
connector <4G6>
2.Water temperature sensor unit
connector <4G6>
<>>B<<3.Radiator lower hose connection
4.Engine control oxygen sensor
connector and connector bracket
<4G1>
5.Control wiring harness clip <4G6>
6.Cooling water inlet hose fitting
>>A<<7.Thermostat
THERMOST
A T
ENGINE COOLING14-25
REMOV A L SER V ICE POINT
<> RADIAT OR LOW E R HOSE DIS-
CONNECTION
AC200641AC
Mating marks
Make mating marks on the rad i ator lower ho se an d
the hose clamp. Disconn
ect t he radiator lower hose.
INSTALLA T ION SER VICE POINTS
>>A<< THERMOSTA T INST ALLA TION
CAUTION
Make absolutely sure that no oil adheres to the
rubber ring of the thermostat. Also do not fold or
scratch the rubber ring during installation.
AC000279
Jiggle valve
Rubber ring
AB
Install the thermostat so that the jiggle valve is facing
straight up. Be careful not to fold or scratch the rub
-
ber ring.

WATER HOSE AND WATER PIPE
ENGINE COOLING14-29
WATER HOSE AND WATER PIPE
REMOVAL AND INSTALLATION <4G1>M1141003300415
Pre-removal and Post-installation Operation
•Under Cover Removal and Installation
•Engine Coolant Draining and Supplying (Refer to P.14-21).
•Air Cleaner Assembly Removal and Installation (Refer to
GROUP 15 P.15-3).
•Thermostat Removal and Installation (Refer to P.14-24).
AC203411
1
2 3
4
5
6
7
8
10
9
13 ± 2 N·m
23 ± 4 N·m
13 ± 2 N·m
N
N
AC
1112
13
N
Removal steps
1.Water temperature sensor unit
connector
2.Water temperature gauge unit
connector
3.Control wiring harness and harness
bracket
<>>>B<<4.Radiator upper hose connection
5.Throttle body water feed hose
6.Thermostat case assembly
7.Thermostat case gasket
>>A<<8.Cooling water line O-ring
9.Control wiring harness clamp
10.Throttle body water return hose
11 .Heater water hose connection
12.Water pump inlet pipe
>>A<<13.Cooling water line O-ring
REMOV
A L SER VICE POINT
<> RADIAT OR UPPER HOSE DISCON-
NECTION
AC200641AC
Mating marks
After making matin g ma rks on the radia t or upp er
hose
and h o se clamp, disconnect the radia t or upp er
hose
.

WATER HOSE AND WATER PIPE
ENGINE COOLING14-31
REMOVAL AND INSTALLATION <4G6>
M1141003300426
Pre-removal and Post-installation Operation
•Engine Coolant Draining and Supplying (Refer to P.14-21).
•Air Cleaner Assembly Removal and Installation (Refer to
GROUP 15 P.15-3).
•Thermostat Removal and Installation (Refer to P.14-24).
AC303471
1
2
3
4
5 6
7
8
9
9
13 ± 2 N·m
23 ± 4 N·m
13 ± 2 N·m
N
N
AB
2
Sealant: Mitsubishi Genuine Part No. MD970389 or equivalent
Ø3 mm
Ø3 mm
5
Removal steps
<>>>C<<1.Radiator upper hose connection
>>B<<2.Cooling water outlet hose fitting
3.Throttle body water return hose
4.Throttle body water feed hose
>>B<<5.Thermostat case assembly
6.Heater water hose connection
7.Control wiring harness clamp
8.Water pump inlet pipe
>>A<<9.Cooling water line O-ring
Removal steps (Continued)

AC303473
18
17 15
20
12
9
13
5
2
9
3
4
1
10
6
10
12 ± 2 N·m
AC
12 ± 2 N·m
16
19
8
11
7
Radiator removal steps
1.Drain plug
2.Radiator cap
3.Radiator condenser tank hose
4.Radiator condenser tank assembly
<>>>A<<5.Radiator upper hose
<>>>A<<6.Radiator lower hose
7.Cooling fan motor drive control unit
connector
8.T/M oil cooler line hose connection

9.Radiator support upper insulator
•Radiator and cooling fan motor &
shroud assembly
10.Radiator support lower insulator
11 .T/M oil cooler line hose
12.Cooling fan motor & shroud
assembly
13.Radiator assembly
Cooling fan motor removal
steps

3.Radiator condenser tank hose
<>>>A<<5.Radiator upper hose
7.Cooling fan motor drive control unit
connector
12.Cooling fan motor & shroud
assembly
15.Cooling fan (L.H.)
16.Cooling fan (R.H.) A/C>
17.Cooling fan motor drive control unit
18.Cooling fan motor (L.H.)
19.Cooling fan motor (R.H.) with A/C>
20.Cooling fan shroud
RADIA T OR
ENGINE COOLING14-34
REMOV A L SER VICE POINT
<> RADIAT OR UPPER HOSE/RADIA-
TO R LOW E R HOSE DISCONNECTION
AC200641AC
Mating marks
Make mating marks on the rad i ator hose and th e
hose
cla m p. Disconnect the ra diat or hoses.
Cooling fan motor removal steps
(Continued)