Mitsubishi Grandis. Manual — part 807
14-1
GROUP 14
ENGINE COOLING
CONTENTS
GENERAL INFORMATION . . . . . . . .
SERVICE SPECIFICATIONS. . . . . . .
LUBRICANT. . . . . . . . . . . . . . . . . . . .
SEALANT OR ADHESIVE . . . . . . . . .
SPECIAL TOOL . . . . . . . . . . . . . . . . .
TROUBLESHOOTING . . . . . . . . . . . .
INSPECTION CHART FOR TROUBLE SYMPTOMS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSPECTION PROCEDURE FOR TROUBLE
SYMPTOMS . . . . . . . . . . . . . . . . . . . . . . . .
INSPECTION PROCEDURE 1: Radiator Fan and
Condenser Fan do not Operate . . . . . . . . .
INSPECTION PROCEDURE 2: Radiator Fan and
Condenser Fan do not Change Speed or Stop
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSPECTION PROCEDURE 3: Radiator Fan does not
Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSPECTION PROCEDURE 4: Condenser Fan does
not Operate . . . . . . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE . . . . . . . . . . .
ENGINE COOLANT LEAK CHECK. . . . . . .
RADIATOR CAP VALVE OPENING PRESSURE
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE COOLANT REPLACEMENT. . . . .
CONCENTRATION MEASUREMENT . . . .
FAN CONTROLLER CHECK . . . . . . . . . . .
FAN CONTROL RELAY CONTINUITY CHECK
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THERMOSTAT . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .
WATER PUMP . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
WATER HOSE AND WATER PIPE . .
REMOVAL AND INSTALLATION . . . . . . . .
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .
RADIATOR . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
GENERAL INFORMATION
ENGINE COOLING
14-2
GENERAL INFORMATION
M1141000100467
The cooling system is designed to keep every part of
the engine at appropriate temperature in whatever
condition the engine may be operated. The cooling
method is of the water-cooled, pressure forced
circulation type in which the water pump pressurizes
coolant and circulates it throughout the engine. If the
coolant temperature exceeds the prescribed
temperature, the thermostat opens to circulate the
coolant through the radiator as well so that the heat
absorbed by the coolant may be radiated into the air.
The water pump is of the centrifugal type and is
driven by the drive belt from the crankshaft. The
radiator is the corrugated fin, down flow type.
SERVICE SPECIFICATIONS
M1141000300494
LUBRICANT
M1141000400435
SEALANT OR ADHESIVE
M1141000500454
Item
Specification
Radiator
Performance kJ/h
228,240
Built-in A/T oil cooler
Performance kJ/h
5,652
Item
Standard value
Limit
Fan controller V
A/C OFF
1 or less
-
A/C ON
Repeat
8.2
± 2.6
System voltage
± 2.6
-
High-pressure valve opening pressure of radiator cap kPa
93
− 123
Minimum 83
Range of coolant antifreeze concentration of radiator %
30
− 60
-
Thermostat
Valve opening temperature of thermostat
°C
82
± 1.5
-
Full-opening temperature of thermostat
°C
95
-
Valve lift mm
8.5 or more
-
Item
Specified coolant
Quantity L
Engine coolant (including
radiator condense tank)
DIA QUEEN SUPER LONG LIFE
COOLANT or equivalent
Without rear heater
8.0
With rear heater
9.5
Item
Specified sealant
Thermostat case, Water outlet fitting
MITSUBISHI GENUINE Part No.MD970389 or equivalent
Thermostat case assembly bolt
3M Stud Locking 4170 or equivalent
Cylinder block drain plug
3M Nut Locking Part No.4171 or equivalent
SPECIAL TOOL
ENGINE COOLING
14-3
SPECIAL TOOL
M1141000600321
TROUBLESHOOTING
INSPECTION CHART FOR TROUBLE
SYMPTOMS
M1141005600445
Tool
Number
Name
Use
MB991871
LLC changer
Coolant refilling
MB991871
Trouble symptom
Inspection
procedure No.
Reference page
Radiator fan and condenser fan do not operate
1
Radiator fan and condenser fan do not change speed or stop
2
Radiator fan does not operate
3
Condenser fan does not operate
4
TROUBLESHOOTING
ENGINE COOLING
14-4
INSPECTION PROCEDURE FOR
TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1: Radiator Fan and Condenser Fan do not Operate
CIRCUIT OPERATION
• The fan controller is powered from fusible link
No.2.
• The engine-ECU <M/T> or engine-A/T-ECU
<A/T> uses input signals from the A/C switch, the
water temperature sensor unit and the vehicle
speed sensor <M/T> or the output shaft speed
sensor <A/T> to control the speed of the radiator
fan motor and the condenser fan motor.
• The engine-ECU <M/T> or engine-A/T-ECU
<A/T> controls the fan controller to activate the
radiator fan motor and the condenser fan motor.
FUSIBLE
LINK
FAN CONTROL
RELAY
RADIATOR
FAN MOTOR
CONDENSER
FAN MOTOR
FAN CONTROL CIRCUIT
FAN
CONTROLLER
2
ENGINE CONTROL
RELAY
ENGINE-ECU <M/T>
OR
ENGINE-A/T-ECU <A/T>
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
Radiator Fan and Condenser Fan Drive Circuit
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