Mitsubishi Lancer Evolution IX. Manual — part 658
AC210667
Cooling fan motor
connector:
Harness side
MB991222
Circuit tester
Fan controller
AB
ON-VEHICLE SERVICE
ENGINE COOLING
14-17
5. Insert special tool probe (MB991222) at the back
of the cooling fan motor connector.
6. Connect the special tool to the circuit tester.
7. Ensure that the A/C switch is off, and start the
engine and run it at idle.
8. Measure the voltage between the cooling fan
motor connector terminals.
Standard value: 1V or less
9. Turn the A/C switch to the "ON" position.
WARNING
Stay clear of the fan when the fan starts run-
ning.
10. Measure the voltage between the cooling fan
motor connector terminals while the fan is
running. The voltage should repeat the values 1)
and 2) below.
Standard value:
1) 8.2
± 2.6 V
2) Battery positive voltage
± 2.6 V
11.If the voltage does not repeatedly change as
indicated, replace the fan controller.
12.Install the centre under cover (Refer to GROUP
51, Front Bumper
).
FAN CONTROL RELAY CONTINUITY
CHECK
M1141006200354
1
3
4
2
3
4
1
2
AC210672
Battery
AB
Battery
voltage
Terminal No.to
be connected to
tester
Continuity test
results
Not applied 4
− 2
Open circuit
• Connect
terminal
No.1 and
battery
(+)
terminal.
• Connect
terminal
No.3 and
battery
(
−)
terminal.
4
− 2
Less than 2 ohms
COOLING FAN MOTOR CHECK
M1141007100134
1. Remove the centre under cover (Refer to GROUP
51, Front Bumper
).
AC210668
Cooling fan
motor
connector:
Component side
Cooling fan motor
AB
THERMOSTAT
ENGINE COOLING
14-18
2. Remove the cooling fan motor connector.
WARNING
Stay clear of the fan when the fan starts run-
ning.
3. Check to see that the fan motor of the radiator
turns when applying battery power between the
connector terminals of the cooling fan motor. Also
check to see that there is no abnormal sound
coming from the cooling fan motor at this time.
4. If the cooling fan motor is defective, replace it.
5. Install the centre under cover (Refer to GROUP
51, Front Bumper
).
THERMOSTAT
REMOVAL AND INSTALLATION
M1141002400884
Pre-removal Operation
• Under Cover Removal (Refer to GROUP 51, Front
).
• Engine Coolant Draining (Refer to
• Intake Air Duct Removal (Refer to GROUP 15, Air
Cleaner
).
• Air Hose E, Air Pipe C and Air Hose D Removal (Refer to
GROUP 15, Intercooler
).
Post-installation Operation
• Air Hose E, Air Pipe C and Air Hose D Installation (Refer
to GROUP 15, Intercooler
).
• Intake Air Duct Installation (Refer to GROUP 15, Air
Cleaner
).
• Engine Coolant Refilling (Refer to
• Under Cover Installation (Refer to GROUP 51, Front
).
AC504958
1
8
7
4
3
2
AB
11 ± 1 N·m
5.0 ± 1.0 N·m
10 ± 1 N·m
5
6
11 ± 1 N·m
Removal steps
1.
Accelerator cable connection <LH
drive vehicles>
2.
Control wiring harness connection
3.
Vacuum hose and pipe assembly
<<
A
>> >>
B
<< 4.
Radiator upper hose connection
5.
Wiring harness clamp
Removal steps (Continued)
THERMOSTAT
ENGINE COOLING
14-19
REMOVAL SERVICE POINT
<<A>> RADIATOR UPPER HOSE DISCON-
NECTION
AC200641AB
Mating marks
Make mating marks on the radiator hose and the
hose clamp. Disconnect the radiator hose.
INSTALLATION SERVICE POINTS
>>A<< THERMOSTAT INSTALLATION
CAUTION
Make absolutely sure that no oil is adhering to
the rubber ring of the thermostat. In addition, be
careful not to fold over or scratch the rubber ring
when inserting. If the rubber ring is damaged,
replace the thermostat.
Install the thermostat being careful not to fold over or
scratch the rubber ring.
>>B<< RADIATOR UPPER HOSE
CONNECTION
AC200642
Mating marks
Projection
Water outlet fitting
AB
1. Insert each hose as far as the projection of the
water outlet fitting.
2. Align the mating marks on the radiator hose and
hose clamp, and then connect the radiator hose.
INSPECTION
M1141002500494
THERMOSTAT CHECK
ACX00400
1. Immerse the thermostat in water, and heat the
water while stirring. Check the thermostat valve
opening temperature.
Standard value:
Valve opening temperature: 80
± 1.5°C
ACX00401AB
Valve lift
2. Check that the amount of valve lift is at the
standard value when the water is at the
full-opening temperature.
NOTE: Measure the valve height when the ther-
mostat is fully closed, and use this measurement
to compare the valve height when the thermostat
is fully open.
Standard value:
Full-opening temperature: 93
°C
Amount of valve lift: 9.5 mm or more
6.
Harness bracket
7.
Water outlet fitting
>>
A
<< 8.
Thermostat
Removal steps (Continued)
WATER PUMP
ENGINE COOLING
14-20
WATER PUMP
REMOVAL AND INSTALLATION
M1141002701004
CAUTION
If the vehicle is equipped with the Brembo
™ disc brake, during maintenance, take care not to contact
the caliper with tools or parts, because the caliper paint will be scratched.
Pre-removal Operation
• Under Cover Removal (Refer to GROUP 51, Front
).
• Engine Coolant Draining (Refer to
• Timing Belt Tensioner Adjuster Removal (Refer to
GROUP 11A, Timing Belt
).
Post-installation Operation
• Timing Tensioner Adjuster Belt Installation (Refer to
GROUP 11A, Timing Belt
).
• Engine Coolant Refilling (Refer to
• Under Cover Installation (Refer to GROUP 51, Front
).
AC406755
AC504976AB
N
22 ± 4 N·m
2
1
4
3
14 ± 1 N·m
24 ± 4 N·m
23 ± 3 N·m
N
20 ± 2 N·m
8 × 60
8 × 22
8 × 14
8 × 22
8 × 55
Bolt specifications
2
Nominal diameter × Nominal length mm
Removal steps
1.
Alternator brace
2.
Water pump
3.
Water pump gasket
>>
A
<< 4.
O-ring
Removal steps (Continued)
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