radiator fan motor MITSUBISHI LANCER 2005 Workshop Manual

14-1
GROUP 14
ENGINE COOLING
CONTENTS
GENERAL INFORMATION . . . . . . . .14-2
SERVICE SPECIFICATIONS . . . . . . .14-2
LUBRICANT . . . . . . . . . . . . . . . . . . . .14-2
SEALANTS . . . . . . . . . . . . . . . . . . . .14-3
SPECIAL TOOLS . . . . . . . . . . . . . . . .14-3
TROUBLESHOOTING . . . . . . . . . . . .14-5
INSPECTION CHART FOR TROUBLE
SYMPTOMS . . . . . . . . . . . . . . . . . . . . . . . . 14-5
INSPECTION PROCEDURE FOR
TROUBLE SYMPTOMS . . . . . . . . . . . . . . . 14-6
ON-VEHICLE SERVICE . . . . . . . . . . .14-22
ENGINE COOLANT LEAK CHECK . . . . . . 14-22
RADIATOR CAP VALVE OPENING
PRESSURE CHECK . . . . . . . . . . . . . . . . . . 14-22
ENGINE COOLANT REPLACEMENT . . . . 14-22
CONCENTRATION MEASUREMENT . . . . 14-23COOLING FAN MOTOR DRIVE CONTROL
UNIT CHECK . . . . . . . . . . . . . . . . . . . . . . . . 14-23
FAN CONTROL RELAY CONTINUITY
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-24
COOLING FAN MOTOR CHECK . . . . . . . . 14-25
THERMOSTAT . . . . . . . . . . . . . . . . . .14-26
REMOVAL AND INSTALLATION . . . . . . . . 14-26
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . 14-27
WATER PUMP . . . . . . . . . . . . . . . . . .14-29
REMOVAL AND INSTALLATION <4G1> . . 14-29
REMOVAL AND INSTALLATION <4G6> . . 14-30
WATER HOSE AND WATER PIPE . .14-31
REMOVAL AND INSTALLATION <4G1> . . 14-31
REMOVAL AND INSTALLATION <4G6> . . 14-33
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . 14-34
RADIATOR . . . . . . . . . . . . . . . . . . . . .14-35
REMOVAL AND INSTALLATION . . . . . . . . 14-35

ON-VEHICLE SERVICE
ENGINE COOLING14-23
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:
40 ± 5 N⋅m <4G1>
44 ± 5 N⋅m <4G6>
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
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:
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 MEASUREMENTM1141001100352
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.
COOLING FAN MOTOR DRIVE CONTROL
UNIT CHECK
M1141006100216
1. Remove the cooling fan motor drive control unit
connector.
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
AC200625
Cylinder block
drain plug
AC
AC303612AB
MB991871
AIR HOSE
AC103195
Y1716AU
1 23
AC
Cooling fan motor
drive control unit

ON-VEHICLE SERVICE
ENGINE COOLING14-25
COOLING FAN MOTOR CHECKM11410071000601. Remove the cooling fan motor connector.
2. Check to see that the cooling fan motor of the
radiator turns when applying battery power
between the connector terminal 1 and 2 of the
cooling fan motor. Also check to see that there is
no abnormal sound coming from the cooling fan
motor at this time.
3. If the cooling fan motor is defective, replace it.
(Refer to P.14-35).
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>

RADIATOR
ENGINE COOLING14-36
AC303473
18 171520 12
9
14
5 2
9
3
4
1
10
6 10
12 ± 2 N·m
AB
12 ± 2 N·m<4G1 (Vehicles with A/C)>
16
19
8
11
7
AC303474
18 1715
20 12 9
14
5 2
9
3
4
1
10
6 10
12 ± 2 N·m
AB
<4G6>
13
7
12 ± 2 N·m
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
connector8. 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 Radiator removal steps

RADIATOR
ENGINE COOLING14-37
REMOVAL SERVICE POINT
<> RADIATOR UPPER
HOSE/RADIATOR LOWER HOSE
DISCONNECTION
Make mating marks on the radiator hose and the
hose clamp. Disconnect the radiator hoses.
INSTALLATION SERVICE POINT
>>A<< RADIATOR LOWER
HOSE/RADIATOR UPPER HOSE
CONNECTION
1. Insert radiator lower hose as far as the projection
of the cooling water inlet hose fitting.
2. Insert radiator upper hose as far as the projection
of the thermostat case assembly <4G1> or the
cooling water outlet hose fitting <4G6>.
3. Align the mating marks on the radiator hose and
hose clamp, and then connect the radiator hose.
12. Cooling fan motor & shroud
assembly
13. A/C condenser fan motor & shroud
assembly <4G6>
14. 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 Radiator removal steps
12. Cooling fan motor & shroud
assembly
15. Cooling fan (L.H.)
16. Cooling fan (R.H.) <4G1 (Vehicles
with A/C)>
17. Cooling fan motor drive control unit
18. Cooling fan motor (L.H.)
19. Cooling fan (R.H.) motor <4G1
(Vehicles with A/C)>
20. Cooling fan shroudCooling fan motor removal steps
(Continued)
AC200641AC
Mating marks
AC200642
Mating marks
Projection
Cooling water hose fitting
or thermostat case assembly
AK
Radiator hose

ECU
COMPONENT LOCATIONS70-3
NOTE: *: also equipped on the rear doors.
AC304537
JK*
AE
AC100209AC
A
ABS-ECU

Hydraulic unit
AC206790
A
AD
ABS-ECU
Hydraulic unit

AC301728AB
BFront-ECU
Battery
AC300571
C
ACRadiator fan
Cooling fan motor
drive control unit
AC301746
DColumn switch
(incorporating
column-ECU)
AB
AC301732AB
E
A/C-ECU

COOLING SYSTEM
CIRCUIT DIAGRAMS90-41
COOLING SYSTEM
M1901001000904
FUSIBLE
LINK2
ENGINE
CONTROL
RELAY
ENGINE-
ECU
ENGINE-
A/T-ECU


FAN
CONTROL
RELAY
RADIATOR
FAN MOTOR CONDENSER
FAN MOTOR COOLING FAN MOTOR
DRIVE CONTROL UNITINPUT SIGNAL
·A/C SWITCH
·WATER
TEMPERATURE
SENSOR UNIT ·OUTPUT SHAFT
SPEED SENSOR
·VEHICLE SPEED
SENSOR
SMOOTHING
CIRCUIT
INPUT
SIGNAL
PROCESSING
DRIVE
CIRCUITFIELD EFFECT
TRANSISTOR
CIRCUIT
TEMPERATURE
DETECTIONCURRENT
DETECTION
Wire colour code
B : Black LG : Light green G : Green L : Blue
W : White Y : Yellow SB : Sky blue BR : Brown
O : Orange GR : Grey R : Red P : Pink V : Violet
ENGINE
CONTROL
SYSTEM

COOLING SYSTEM
CIRCUIT DIAGRAMS90-42
COOLING SYSTEM
M1901001000915
FUSIBLE
LINK2
ENGINE
CONTROL
RELAY
ENGINE-
ECU
ENGINE-
A/T-ECU


FAN CONTROL
RELAY
RADIATOR
FAN MOTOR CONDENSER
FAN MOTOR COOLING FAN MOTOR
DRIVE CONTROL UNITINPUT SIGNAL
·A/C SWITCH
·WATER
TEMPERATURE
SENSOR UNIT·OUTPUT SHAFT
SPEED SENSOR
·VEHICLE SPEED
SENSOR
SMOOTHING
CIRCUIT
INPUT
SIGNAL
PROCESSING
DRIVE
CIRCUIT
TEMPERATURE
DETECTIONCURRENT
DETECTION
ENGINE
CONTROL
SYSTEM
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet FIELD EFFECT
TRANSISTOR
CIRCUIT

MANUAL AIR CONDITIONER
CIRCUIT DIAGRAMS90-116
MANUAL AIR CONDITIONER (CONTINUED)
FUSIBLE
LINK2ENGINE
CONTROL
RELAY
RADIATOR
FAN RELAY
SMOOTHING
CIRCUIT
INPUT
SIGNAL
PROCESSING
DRIVE
CIRCUIT
TEMPERATURE
DETECTIONCURRENT
DETECTIONRADIATOR
FAN MOTOR COOLING FAN MOTOR
DRIVE CONTROL UNIT
CONDENSER
FAN MOTOR
NOTE
: M/T
: A/T
: EXCEPT 4G6
: 4G6
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet
FIELD EFFECT
TRANSISTOR
CIRCUIT BATTERYA/C-ECU
RELAY
BOX
A/C COMPRESSOR
RELAY
A/C COMPRESSOR
A/C
REFRIGERANT
TEMPERATURE
SWITCH
MAGNETIC
CLUTCHLOW-
PRESSURE
SIDE
HIGH-
PRESSURE
SIDE
DUAL
PRESSURE
SWITCH
ENGINE-
ECU
ENGINE-
A/T-ECU
(FUSE )5

MANUAL AIR CONDITIONER
CIRCUIT DIAGRAMS90-118
MANUAL AIR CONDITIONER (CONTINUED)
FUSIBLE
LINK2ENGINE
CONTROL
RELAY
RADIATOR
FAN RELAY
SMOOTHING
CIRCUIT
INPUT
SIGNAL
PROCESSING
DRIVE
CIRCUIT
TEMPERATURE
DETECTIONCURRENT
DETECTIONRADIATOR
FAN MOTOR COOLING FAN MOTOR
DRIVE CONTROL UNIT
CONDENSER
FAN MOTOR
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet FIELD EFFECT
TRANSISTOR
CIRCUIT
NOTE
: M/T
: A/T
: EXCEPT 4G6
: 4G6
BATTERYA/C-ECU
A/C COMPRESSOR
RELAY
A/C COMPRESSOR
A/C
REFRIGERANT
TEMPERATURE
SWITCH
MAGNETIC
CLUTCHLOW-
PRESSURE
SIDE
HIGH-
PRESSURE
SIDE
DUAL
PRESSURE
SWITCH
ENGINE-
ECU
ENGINE-
A/T-ECU
RELAY
BOX
(FUSE )5