check engine MITSUBISHI LANCER 2005 Workshop Manual

12-1
GROUP 12
ENGINE
LUBRICATION
CONTENTS
GENERAL INFORMATION . . . . . . . .12-2
SERVICE SPECIFICATION . . . . . . . .12-2
LUBRICANT . . . . . . . . . . . . . . . . . . . .12-2
SEALANT . . . . . . . . . . . . . . . . . . . . . .12-3SPECIAL TOOLS . . . . . . . . . . . . . . . .12-3
ON-VEHICLE SERVICE . . . . . . . . . . .12-4
ENGINE OIL CHECK . . . . . . . . . . . . . . . . . 12-4
ENGINE OIL REPLACEMENT . . . . . . . . . . 12-4
ENGINE OIL FILTER REPLACEMENT . . . . 12-4
OIL PRESSURE CHECK . . . . . . . . . . . . . . 12-5

ON-VEHICLE SERVICE
ENGINE LUBRICATION12-4
ON-VEHICLE SERVICE
ENGINE OIL CHECKM1121000900342
1. Pull out the engine oil level gauge slowly and
check that the oil level is in the illustrated range.
2. Check that the oil is not excessively dirty, that
there is no coolant or petrol mixed in, and that it
has sufficient viscosity.
ENGINE OIL REPLACEMENTM1121001000416
1. Start the engine and allow it to warm up until the
temperature of the coolant reaches 80 °C to 90
°C.
2. Remove the engine oil filler cap.
CAUTION
Use care as engine oil could be hot.
3. Remove the engine oil pan drain plug to drain
engine oil.4. Install a new engine oil pan drain plug gasket so
that it faces in the direction shown in the
illustration, and then tighten the engine oil pan
drain plug to the specified torque.
Tightening torque: 39 ± 5 N⋅m
NOTE: Install the engine oil pan drain plug gasket
so it faces in the direction shown in the illustration.
5. Refill with specified quantity of engine oil.
Specified Engine Oil (ACEA and API
classification): ACEA A1, A2 or A3/API SG or
higher
Total quantity (Includes volume inside engine
oil filter):
3.3 L <4G1>
4.3 L <4G6>
6. Install the engine oil filler cap.
7. Check engine oil level.
ENGINE OIL FILTER REPLACEMENTM1121001100383
1. Start the engine and allow it to warm up until the
temperature of the coolant reaches 80 °C to 90
°C.
2. Remove the engine oil filler cap.
CAUTION
Use care as engine oil could be hot.
3. Remove the engine oil pan drain plug to drain
engine oil.
4. Remove the under cover.
ACX00892 AC
Good
MaximumMinimum
<4G1>
AC205268
Maximum MinimumGood
AC
<4G6>
AC208299
Engine oil pan
AC
Engine oip pan
drain plug
Engine oip pan
drain plug
Engine oil
pan side
AC301513

ON-VEHICLE SERVICE
ENGINE LUBRICATION12-5
5. Use the respective tool in the following table to
remove the engine oil filter.
6. Clean the filter bracket side mounting surface.
7. Apply a small amount of engine oil to the O-ring of
the new engine oil filter.
8. Once the O-ring of the engine oil filter is touching
the flange, use the respective tool in the following
table to tighten to the specified torque.9. Install the engine oil pan drain plug and refill the
engine oil (Refer to P.12-4).
10.Race the engine 2−3 times, and check to be sure
that no engine oil leaks from installation section of
the engine oil filter.
OIL PRESSURE CHECKM1121002300368
1. Check engine oil quantity.
2. Remove the oil pressure switch terminal. Number Special tool
MD348631 <4G1> Oil filter wrench (MB991828)
or equivalent
MD365876 <4G1>
MD360935 <4G1> Oil filter wrench (MB991396)
or equivalent
MD136466 <4G6> Commercially- available tool
MD322508 <4G6>
MD356000 <4G6> Oil filter wrench (MB991610)
or equivalent
AC000093
MB991396
<4G1>,
MB991828
<4G1>,
MB991610
<4G6> or
commercially-
available tool
AI
AC103250AD
O-ring
Number Special tool Tightening torque
MD348631
<4G1>Oil filter wrench
(MB991828) or
equivalentApproximately 3/4
turn (16 ± 4 N⋅m)
MD365876
<4G1>
MD360935
<4G1>Oil filter wrench
(MB991396) or
equivalentApproximately 1 turn
(14 ± 2 N⋅m)
MD136466
<4G6>Commercially-
available toolApproximately 3/4
turn (17 ± 3 N⋅m)
MD322508
<4G6>
MD356000
<4G6>Oil filter wrench
(MB991610) or
equivalentApproximately 3/4
turn (14 ± 2 N⋅m)
AK101640
<4G1>
Oil pressure
switch
Oil filter
AD
AK300647
AB
<4G6>
Oil filter bracket
Oil pressure switch

ON-VEHICLE SERVICE
ENGINE LUBRICATION12-6
CAUTION
Since sealant is applied to the thread of oil
pressure switch, take care not to damage the oil
pressure switch when removing it.
3. Use the special tool Oil pressure switch wrench
(MD998054) to remove the oil pressure switch.
4. Install the oil pressure gauge.
NOTE: Use an adapter of PT 1/8 thread.
5. Run the engine to warm it.
6. After the engine has been warmed up, check that
oil pressure is within the standard value.
Standard value:
At idle: 29 kPa or more
At 3,500 r/min: 294 − 686 kPa
7. Remove the oil pressure gauge.8. Apply the specified sealant to the thread of oil
pressure switch.
Specified sealant: 3M ATD Part No. 8660 or
equivalent
CAUTION
Do not start the engine within one hour after the
oil pressure switch has been installed.
9. Use the special tool Oil pressure switch wrench
(MD998054) to tighten the oil pressure switch to
the specified torque.
Tightening torque:
<4G1> 19 ± 3 N⋅m (14 ± 2 ft-lb)
<4G6> 10 ± 2 N⋅m (87 ± 17 ft-lb)
10.Install the oil pressure switch terminal.
AKX00294
MD998054
AD
AKX00295AD
AKX00294
MD998054
AD

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

SPECIAL TOOLS
ENGINE COOLING14-4
MB991955
A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991825
F: MB991826MUT-III sub assembly
A: Vehicle
communication
interface (V.C.I.)
B: MUT-III USB cable
C: MUT-III main
harness A (Vehicles
with CAN
communication
system)
D: MUT-III main
harness B (Vehicles
without CAN
communication
system)
E: MUT-III
measurement
adapter
F: MUT-III trigger
harnessChecking the A/T
(Diagnosis display using the
MUT-III) Tool Number Name Use
MB991910
MB991826
MB991955
MB991911
MB991824
MB991827
MB991825
A
B
C
D
E
F
DO NOT USE

TROUBLESHOOTING
ENGINE COOLING14-7
CIRCUIT OPERATION
•The cooling fan motor drive control unit is
powered from fusible link (2).
•The engine-ECU or engine-A/T-ECU
uses input signals from the A/C switch, the
water temperature sensor unit and the vehicle
speed sensor or the output shaft speed
sensor to control the speed of the cooling
fan motor (L.H.) and the cooling fan motor (R.H.)
<4G1 (Vehicles with A/C)> or A/C condenser fan
motor <4G6>.
•The engine-ECU or engine-A/T-ECU
controls the cooling fan motor drive control
unit to activate the cooling fan motor (L.H.) and
the cooling fan motor (R.H.) <4G1 (Vehicles with
A/C)> or A/C condenser fan motor <4G6>.
TECHNICAL DESCRIPTION
•The cause could be a malfunction of the cooling
fan motor drive control unit power supply or earth
circuit.
•If the communication line wiring harness between
the cooling fan motor drive control unit and the
engine-ECU or engine-A/T-ECU is
short-circuited to earth, the cooling fan motor
(L.H.) and the cooling fan motor (R.H.) <4G1
(Vehicles with A/C)> or the A/C condenser fan
motor <4G6> will not rotate.
•The cause could also be a malfunction of the
cooling fan motor (L.H.).
•The cause could also be a malfunction of imput
signal from the A/C switch, the water temperature
sensor unit and the vehicle speed sensor
or the output shaft speed sensor to the
engine-ECU or engine-A/T-ECU .
•The cause could also be a malfunction of the
cooling fan motor drive control unit or the
engine-ECU or engine-A/T-ECU .
TROUBLESHOOTING HINTS
•Malfunction of fusible link (2)
•Malfunction of fan control relay
•Malfunction of cooling fan motor (L.H.) without A/C>
•Malfunction of cooling fan motor drive control unit
•Malfunction of engine-ECU or
engine-A/T-ECU
•Damaged wiring harness or connector
DIAGNOSIS
STEP 1. Check the cooling fan motor (L.H.).

Refer to P.14-25.
Q: Is the cooling fan motor (L.H.) in good condition?
YES :
Go to Step 2 .
NO : Replace the cooling fan motor (L.H.) (Refer
to P.14-35). Then go to Step 24 .
STEP 2. Measure the power supply voltage at
cooling fan motor drive control unit connector
A-18.
(1) Disconnect cooling fan motor drive control unit
connector A-18 and measure wiring harness side
connector.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between cooling fan motor
drive control unit connector A-18 terminal 3 and
body earth.
•The voltage should measure system voltage.
(4) Turn the ignition switch to the "LOCK" (OFF)
position.
(5) Connect cooling fan motor drive control unit
connector A-18.
Q: Is the measured voltage system voltage?
YES :
Go to Step 17 .
NO : Go to Step 3 .
AC100293
A-18
321
Connector: A-18
AD
AC000246AF
A-18 Connector
(Component side)

TROUBLESHOOTING
ENGINE COOLING14-8
STEP 3. Check the cooling fan motor drive
control unit connector A-18.
Q: Is the connector in good condition?
YES : .
Go to Step 4 .
NO : . Repair or replace the connector. Then go to
Step 24 .
STEP 4. Check the fusible link No.2.
Q: Is the fusible link No.2 in good condition?
YES : .
Go to Step 5 .
NO : . Replace the fusible link No.2. Then go to
Step 24 .
STEP 5. Measure the power supply voltage at fan
control relay connector A-09X.(1) Disconnect fan control relay connector A-09X
(remove the fan control relay) and measure relay
box side connector.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between fan control relay
connector A-09X terminal 4 and body earth.
•The voltage should measure system voltage.
(4) Turn the ignition switch to the "LOCK" (OFF)
position.
(5) Connect fan control relay connector A-09X
(install the fan control relay).
Q: Is the measured voltage system voltage?
YES :
Go to Step 8 .
NO : Go to Step 6 .
STEP 6. Check the fan control relay connector
A-09X.
Q: Is the connector in good condition?
YES :
Go to Step 7 .
NO : Repair the connector or replace the relay
box. Then go to Step 24 .
AC100293
A-18
321
Connector: A-18
AD
AC303509AB
Fusible link
No.2
Relay box
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
AC303511AB
A-09X Connector
(Relay box side)
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X

TROUBLESHOOTING
ENGINE COOLING14-9
STEP 7. Check the harness wire between fusible
link No.2 and fan control relay connector A-09X
terminal 4.
Q: Is the harness wire in good condition?
YES : .
An intermittent malfunction is suspected
(Refer to GROUP 00 - How to use
troubleshooting P.00-5).
NO : . Repair the damaged harness wire. Then go
to Step 24 .
STEP 8. Check the fan control relay.
Refer to P.14-24.
Q: Is the fan control relay in good condition?
YES :
Go to Step 9 .
NO : Replace the fan control relay. Then go to
Step 24 .
STEP 9. Check the fan control relay connector
A-09X.
Q: Is the connector in good condition?
YES :
Go to Step 10 .
NO : Repair the connector or replace the relay
box. Then go to Step 24 .
STEP 10. Check the harness wire between fan
control relay connector A-09X terminal 2 and
cooling fan motor drive control unit connector
A-18 terminal 3.
Q: Is the harness wire in good condition?
YES :
Go to Step 11 .
NO : Repair the damaged harness wire. Then go
to Step 24 .
STEP 11. Measure the terminal voltage at fan
control relay connector A-09X.
(1) Disconnect fan control relay connector A-09X
(remove the fan control relay) and measure relay
box side connector.
(2) Turn the ignition switch to the "ON" position.
AC303509AB
Fusible link
No.2
Relay box
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X
AC100293
A-18
321
Connector: A-18
AD
AC303510AB
Fan control relay
Relay boxConnector: A-09X
A-09X

TROUBLESHOOTING
ENGINE COOLING14-10
(3) Measure the voltage between fan control relay
connector A-09X terminal 1 and body earth.
•The voltage should measure system voltage.
(4) Turn the ignition switch to the "LOCK" (OFF)
position.
(5) Connect fan control relay connector A-09X
(install the fan control relay).
Q: Is the measured voltage system voltage?
YES : .
Go to Step 14 .
NO : . Go to Step 12 .
STEP 12. Check the J/C No.6 C-12 vehicles> or C-134 ,
intermediate connector A-13 vehicles> C-111 and fan
control relay connector A-09X.
AC303517AB
A-09X Connector
(Relay box side)
AC303524
Connector: C-12
AB
C-12
C-12
AC303525
Connector: C-134
AB
C-134
C-134
AC303526
Connector: A-13
AB
A-13
A-13
AC303527
Connector: C-111
AB
C-111
C-111
615
121179
810234