check engine MITSUBISHI LANCER EVOLUTION 2007 Service Repair Manual

MPI -On-vehicle Service13A-136
INJECTOR CHECK
OPERATION SOUND CHECK
Using a sound scope, check the operation sound of the injector
(“chh” sound) during idling and cranking.
Check that the operation sound increases when the speed
increases.
Caution
The sound of other injectors operating may be heard
even when the injector being checked is not operated.
NOTE
If no operation sound is heard, check the injector drive circuit.
If the circuit is normal, the injector or engine-ECU may be
faulty.
Measurement of Resistance between Terminals
1. Remove the injector connector.
2. Measure the resistance between terminals.
Standard value: 2 - 3Ω(at 20_C)
3. Install the injector connector.
Checking the Injection Condition
1. Following the steps below, bleed out the residual pressure
within the fuel pipe line to prevent flow of the fuel. (Refer
to P.13A-96.)
2. Remove the injector.
3. Arrange the special tool (injector test set), adaptor, fuel
pressure regulator and clips as shown in the illustration
below.

MPI -On-vehicle Service13A-137
MB991607
High-pressure fuel hoseMD998741
MD998706Return hose
BatteryInjectorFuel pressure regulator
Clip
(MB991608)
4. Connect the MUT-IIto the diagnosis connector.
5. Turn the ignition switch to “ON” position. (But do not start
the engine.)
6. Select “Item No. 07” from the MUT-IIActuator test to
drive the fuel pump.
7. Activate the injector and check the atomized spray
condition of the fuel.
The condition can be considered satisfactory unless it
is extremely poor.
8. Stop the actuation of the injector, and check for leakage
from the injector’s nozzle.
Standard value: 1 drop or less per minute
9. Activate the injector without activating the fuel pump; then,
when the spray emission of fuel from the injector stops,
disconnect the special tool and restore it to its original
condition.
10. Disconnect the MUT-II.
High-pressure
fuel hose
BatteryInjectorReturn hose

MPI -On-vehicle Service13A-138
RESISTOR (FOR INJECTOR) CHECK
1. Disconnect the resistor connector.
2. Measure the resistance between each terminal.
Standard value:
Measurement terminalResistanceΩ
1-35.8 - 6.2 (at 20_C)
4-3
5-3
6-3
IDLE SPEED CONTROL SERVO (STEPPER
MOTOR) CHECK
Checking the Operation Sound
1. Check that the engine coolant temperature is 20_Cor
below.
NOTE
Disconnecting the engine coolant temperature sensor
connector and connecting the harness-side of the
connector to another engine coolant temperature sensor
that is at 20_C or below is also okay.
2. Check that the operation sound of the stepper motor
can be heard after the ignition is switched “ON” position.
(but without starting the engine.)
3. If the operation sound cannot be heard, check the stepper
motor’s activation circuit.
If the circuit is normal, it is probable that there is a
malfunction of the stepper motor or of the engine-ECU.
Resistor
(for injector)
Fuel pump relay 3
1
42
53
6
Equipment
side connector
Idle speed control
servo (stepper motor) 1
42
53
6

MPI -Injector13A-141
INJECTOR
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
DFuel Discharge Prevention (Refer to P.13A-125.)
DStrut Tower Bar Removal and Installation
(Refer to GROUP 42.)DAir Hose E, Air By-pass Hose, Air Pipe C Removal
and Installation (Refer to GROUP 15 - Intercooler.)
DFuel Leakage Check
21
3
13 5
6
7
8 9 1011 12
4
8.9±1.9N·m
8.9±1.9N·m 5.0±1.0N·m
Apply engine oil to all
moving parts during
installation.
14 15
16 12
6
5.0±1.0N·m
Removal steps
1. Control harness connector
2. Accelerator cable assembly
connection (Throttle body side)
3. Injector harness connector
"AA4. High-pressure fuel hose connection
5. O-ring
6. Fuel return hose connection
7. Vacuum sensor connector
"AA8. Fuel pressure regulator9. O-ring
10. Fuel return pipe
AA"11. Delivery pipe
12. Insulator
13. Insulator
AA""AA14. Injector
15. Grommet
16. O-ring

MPI -Injector13A-142
REMOVAL SERVICE POINT
AA"DELIVERY PIPE/INJECTOR REMOVAL
Remove the delivery pipe (with the injectors attached to it).
Caution
Care must be taken, when removing the delivery pipe,
not to drop the injector.
INSTALLATION SERVICE POINT
"AAINJECTOR/FUEL PRESSURE REGULATOR
/HIGH-PRESSURE FUEL HOSE INSTALLATION
1. Apply a drop of new engine oil to the O-ring.
Caution
Be sure not to let engine oil enter the delivery pipe.
2. While turning the injector, high-pressure fuel hose and
fuel pressure regulator to the right and left, install the
delivery pipe, while being careful not to damage the O-ring.
After installing, check that the hose turns smoothly.
3. If it does not turn smoothly, the O-ring may be trapped,
remove the injector, high-pressure fuel hose or fuel
pressure regulator and then re-insert it into the delivery
pipe and check once again.
4. Tighten the high-pressure fuel hose and fuel pressure
regulator to the specified torque.
Tightening torque:
5.0±1.0 N·m (High-pressure fuel hose)
8.9±1.9 N·m (Fuel pressure regulator)

14-1
ENGINE COOLING
CONTENTS
GENERAL INFORMATION 2..................
SERVICE SPECIFICATIONS 2.................
LUBRICANT 2...............................
SEALANT 2..................................
SPECIAL TOOLS 3...........................
TROUBLESHOOTING 3.......................
ON-VEHICLE SERVICE 6.....................
Engine Coolant Leak Checking 6................
Radiator Cap Opening Pressure Check 6........Engine Coolant Replacement 6..................
Concentration Measurement 7...................
Radiator Fan Relay Continuity Check 8..........
Radiator Fan Controller Check 8................
Radiator Fan Motor Check 10...................
THERMOSTAT 11............................
WATER PUMP 13............................
WATER HOSE AND WATER PIPE 14..........
RADIATOR 15................................

ENGINE COOLING -Troubleshooting14-4
Measure at the engine-ECU connector C-126.
DConnect the connector.
DPull out the teminal No.21 to disconnect it
(Ignition switch: ON)
OK:Radiator fan motor is rotated.
YES
Engine-ECU terminal voltage check
(Refer to GROUP 13A - Troubleshooting.)NO
Replace the radiator fan controller.
NG
Repair
OK
NG
Repair
OK
Check the harness wire between radiator fan controller and
engine-ECU.
Measure at the engine-ECU connector C-126.

DConnect the connector.
DVoltage between terminal 21 and body earth
(Engine: Idling, engine coolant temperature: 95_C or more)
OK:0.7 V or more

DConnect the connector.
DVoltage between terminal 21 and body earth
(Engine: Idling, A/C switch: ON)
OK:0.7 V or more (When A/C compressor is operating)NG
(2) NGCheck the harness wire between radiator fan controller and
body earth, and repair if necessary.
OK
Measure at the radiator fan controller connector A-21.
DDisconnect the connector, and measure at the harness
side.
(1) Voltage between terminal 3 and body earth
(Ignition switch: ON)
OK:Battery voltage
(2) Continuity between terminal 1 and body earth
OK:Continuity(1) NGCheck the harness wire between radiator fan controller and
radiator fan relay, and repair if necessary.
(3) NGCheck the harness wire between radiator fan relay and body
earth, and repair if necessary.
(2) NGCheck the harness wire between radiator fan relay and engine
control relay, and repair if necessary.
OK
Measure at the radiator fan control relay connector A-09X.
DRemove the relay, and measure at the relay box side.
(1) Voltage between terminal 4 and body earth
OK:Battery voltage
(2) Voltage between terminal 1 and body earth
(Ignition switch: ON)
OK:Battery voltage
(3) Continuity between terminal 3 and body earth
OK:Continuity(1) NGCheck the harness wire between radiator fan relay and fusible
link (2), and repair if necessary.
DFusible link (2) check
DRadiator fan relay continuity check
(Refer to P.14-8.)
DRadiator fan motor check (Refer to P.14-10.)NG
Replace
OK
OK
Engine-ECU terminal voltage check
(Refer to GROUP 13A - Troubleshooting.)
Check the following connectors:
C-126, A-13, A-21
C-126, C-136, A-21
NG
Check the trouble symptoms.

ENGINE COOLING -Troubleshooting14-5
Inspection Procedure 2
Radiator fan does not change speed or stop.
Probable cause
Radiator fan controller uses the signal from engine-ECU to control radiator fan
motor in a continously variable mode.DMalfunction of radiator fan relay
DMalfunction of radiator fan controller
DMalfunction of engine-ECU
DMalfunction of harness, connector
Measure at the engine-ECU connector C-126.
DConnect the connector.
DPull out the teminal No.21 to disconnect it
(Ignition switch: ON)
OK:Radiator fan motor is rotated.
DConnect the teminal No.21 to the body earth
(Ignition switch: ON)
OK:Radiator fan motor stop running.
YES
Engine-ECU terminal voltage check
(Refer to GROUP 13A - Troubleshooting.)NO
Replace the radiator fan controller.
OK
Radiator fan controller check (Refer to P.14-8.)NGReplace the radiator fan controller.
OK
Measure at the engine-ECU connector C-126.

DConnect the connector.
DVoltage between terminal 21 and body earth
(Engine: Idling, engine coolant temperature: 80_C or less)
OK:0 - 0.3 V
(Engine: Idling, engine coolant temperature: 95_C or more)
OK:0.7 V or more

DConnect the connector.
DVoltage between terminal 21 and body earth
(Engine: Idling, engine coolant temperature: 80_C or less)
OK:0 - 0.3 V
(Engine: Idling, A/C switch: ON)
OK:0.7 V or more (When A/C compressor is operating)NG
OK
DCheck the harness wire between radiator fan relay and
engine control relay.
DCheck the harness wire between radiator fan relay and
body earth.
DCheck the harness wire between radiator fan relay and
radiator fan controller.NG
Repair
NG
Replace
OK
OK
OK
Check the following connectors:
C-126, A-13, A-21
C-126, C-136, A-21
NG
Engine-ECU terminal voltage check
(Refer to GROUP 13A - Troubleshooting.)
Check the trouble symptoms.
NG
NG
Repair
Repair
Radiator fan relay continuity check (Refer to P.14-8.)
Check the harness wire between radiator fan controller and
engine-ECU.

ENGINE COOLING -On-vehicle Service14-6
ON-VEHICLE SERVICE
ENGINE COOLANT LEAK CHECKING
1. Confirm that the coolant level is up to the filler neck.
Install a radiator cap tester and apply 160 kPa pressure,
and then check for leakage from the radiator hose or
connections.
Caution
(1) Be sure to completely clean away any moisture
from the places checked.
(2) When the tester is taken out, be careful not to
spill any coolant from it.
(3) Be careful, when installing and removing the tester
and when testing, not to deform the filler neck
of the radiator.
2. If there is leakage, repair or replace the appropriate part.
RADIATOR CAP OPENING PRESSURE CHECK
1. Use a cap adapter to attach the cap to the tester.
2. Increase the pressure until the indicator of the gauge
stops moving.
Limit: 83 kPa
Standard value: 93 - 123 kPa
3. Replace the radiator cap if the reading does not remain
at or above the limit.
NOTE
Be sure that the cap is clean before testing, since rust
or other foreign material on the cap seal will cause an
improper indication.
ENGINE COOLANT REPLACEMENT
1. Remove the under cover.
(Refer to GROUP 51 - Front Bumper.)
2. Drain the engine coolant by removing the drain plug and
then the radiator cap.
Cap adapter
Adapter
Cap adapter

ENGINE COOLING -On-vehicle ServiceENGINE COOLING -On-vehicle Service14-7
3. Remove the cylinder block drain plug from the cylinder
block to drain the engine coolant.
4. Remove the reserve tank to drain the engine coolant.
5. When the engine coolant has drained, pour in water from
the radiator cap to clean the engine coolant line.
6. Coat the thread of the cylinder block drain plug with the
specified sealant and tighten to the specified torque.
Specified sealant:
3M Nut Locking Part No. 4171 or equivalent
7. Securely tighten the radiator drain plug.
8. Install the under cover.
(Refer to GROUP 51 - Front Bumper.)
9. Install the reserve tank.
10. Slowly pour the engine coolant into the mouth of the
radiator until the radiator is full, and pour also into the
reserve tank up to the FULL line.
Recommended anti-freeze:
MITUBISHI GENUINE COOLANT or equivalent
Quantity: 6.0 L
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 the corrosion of the aluminium components.
11. Install the radiator cap securely.
12. Start the engine and warm the engine until the thermostat
opens. (Touch the radiator hose with your hand to check
that warm water is flowing.)
13. After the thermostat opens, race the engine several times,
and then stop the engine.
14. Cool down the engine, and then pour engine coolant into
the reserve tank until the level reaches the FULL line. If
the level is low, repeat the operation from step 11.
CONCENTRATION MEASUREMENT
Measure the temperature and specific gravity of the engine
coolant to check the antifreeze concentration.
Standard value: 30 - 60 % (allowable concentration range)
RECOMMENDED ANTI-FREEZE
AntifreezeAllowable concentration
MITSUBISHI GENUINE COOLANT
or equivalent30 - 60 %
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.
44±5N·m
Water inlet
pipe