check engine MITSUBISHI LANCER 2005 Repair Manual

EMISSION CONTROL <MPI>
ENGINE AND EMISSION CONTROL17-8
VACUUM HOSE CHECKM1173007300159
1. Using the piping diagram as a guide, check to be
sure that the vacuum hoses are correctly
connected.
2. Check the connection condition of the vacuum
hoses, (removed, loose, etc.) and check to be
sure that there are no bends or damage.
VACUUM HOSE INSTALLATIONM1173007200107
1. When connecting the vacuum hoses, they should
be securely inserted onto the nipples.
2. Connect the hoses correctly, using the vacuum
hose piping diagram as a guide.
CRANKCASE EMISSION CONTROL
SYSTEM
GENERAL INFORMATION (CRANKCASE
EMISSION CONTROL SYSTEM)
M1173005000237
The crankcase emission control system prevents
blow-by gases from escaping inside the crankcase
into the atmosphere.
Fresh air is sent from the air cleaner into the
crankcase through the breather hose.
The air becomes mixed with the blow-by gases
inside the crankcase.
The blow-by gas inside the crankcase is drawn into
the intake manifold through the positive crankcase
ventilation (PCV) valve.
The PCV valve lifts the plunger according to the
intake manifold vacuum so as to regulate the flow of
blow-by gas properly.
In other words, the blow-by gas flow is regulated
during low load engine operation to maintain engine
stability, while the flow is increased during high load
operation to improve the ventilation performance.
SYSTEM DIAGRAM
AK204365
Air cleaner
Air
Ventilation hose
Breather hose
PCV valve
AB

EMISSION CONTROL <MPI>
ENGINE AND EMISSION CONTROL17-9
COMPONENT LOCATION (CRANKCASE
EMISSION CONTROL SYSTEM)
M1173007400208
POSITIVE CRANKCASE VENTILATION
SYSTEM CHECK
M1173001100179
1. Remove the ventilation hose from the PCV valve.
2. Remove the PCV valve from the rocker cover.
3. Reinstall the PCV valve at the ventilation hose.
4. Start the engine and run at idle.
5. Place a finger at the opening of the PCV valve
and check that vacuum of the intake manifold is
felt.
NOTE: At this moment, the plunger in the PCV
valve moves back and forth.
6. If vacuum is not felt, clean the PCV valve or
replace it.
POSITIVE CRANKCASE VENTILATION
(PCV) VALVE CHECK
M1173001200187
1. Insert a thin rod into the PCV valve from the side
shown in the illustration (rocker cover installation
side), and move the rod back and forth to check
that the plunger moves.
2. If the plunger does not move, there is a clogging
in the PCV valve. In this case, clean or replace
the PCV valve.
EVAPORATIVE EMISSION CONTROL
SYSTEM
GENERAL INFORMATION (EVAPORATIVE
EMISSION CONTROL SYSTEM)
M1173005100405
The evaporative emission control system prevents
fuel vapours generated in the fuel tank from escaping
into the atmosphere.
Fuel vapours from the fuel tank flow through the fuel
tank pressure control valve and vapour pipe/hose to
be stored temporarily in the canister.
When driving the vehicle, fuel vapours stored in the
canister flow through the purge solenoid and purge
port and go into the intake manifold to be sent to the
combustion chamber.
When the engine coolant temperature is low or when
the intake air quantity is small (when the engine is at
idle, for example), the engine control unit turns the
purge solenoid off to shut off the fuel vapour flow to
the intake manifold.
This does not only insure the driveability when the
engine is cold or running under low load but also
stabilize the emission level.
AK300767
<4G1>
AB
PCV valve
AK204366
<4G6>
AC
PCV valve
AKX00336
PCV valve
AD
AK100010
PCV valve
AC

EMISSION CONTROL <MPI>
ENGINE AND EMISSION CONTROL17-10
SYSTEM DIAGRAM
COMPONENT LOCATION (EVAPORATIVE
EMISSION CONTROL SYSTEM)
M1173007500216
PURGE CONTROL SYSTEM CHECKM1173001400299
AK204367AC
Throttle body
Canister
From
fuel
tank
OFF
ONPurge
control
solenoid
valveControl
relay
BatteryEngine-ECU <4G1-M/T, 4G6>,
Engine-A/T-ECU <4G1-A/T>
Air flow sensor <4G6>
Engine coolant
temperature sensor
Intake air
temperature sensor
Barometric pressure
sensor <4G6> Manifold absolute pressure
(MAP) sensor <4G1>
AK300769
<4G1>
AB
Purge control
solenoid valve
AK300770
<4G6>
AB
Purge control
solenoid valve
AK300771
<4G1>
AB
Plug
Vacuum hose
AK300772
<4G6>
AB
Plug
Vacuum hose

EMISSION CONTROL <MPI>
ENGINE AND EMISSION CONTROL17-11
1. Disconnect the vacuum hose (red stripe) from
throttle body and connect it to a hand vacuum
pump.
2. Plug the nipple from which the vacuum hose was
removed.
3. When the engine is cold or hot, apply a vacuum of
53 kPa, and check the condition of the vacuum.
When engine is cold
(Engine coolant temperature: 40°C or less)
When engine is hot
(Engine coolant temperature: 80°C or higher)
PURGE PORT VACUUM CHECKM1173001500177
1. Disconnect the vacuum hose (red stripe) from the
throttle body and connect a hand vacuum pump to
the nipple.
2. Plug the vacuum hose (red stripe).3. Start the engine.
4. Check that a fairly constant negative pressure is
generated regardless of the engine speed.
5. If no negative pressure is generated, the port is
probably blocked and should be cleaned.
PURGE CONTROL SOLENOID VALVE
CHECK
M1173001700193
NOTE: When disconnecting the vacuum hose,
always make a mark so that it can be reconnected at
original position.
1. Disconnect the vacuum hose from the solenoid
valve.
2. Disconnect the harness connector.
3. Connect a hand vacuum pump to nipple (A) of the
solenoid valve (refer to the illustration at left). Engine condition Normal condition
At idle Vacuum is maintained.
3,000 r/min
Engine condition Normal condition
At idle Vacuum is maintained.
3,000 r/min (within 3
minutes after engine
starts)Vacuum will leak.
AK300773
<4G1>
AB
Plug
Vacuum hose
AK300774
<4G6>
AB
Plug
Vacuum hose
AK100011AC
Vac-
uum
Engine speed (r/min)
AK100012AC
Battery A
AK100013

EMISSION CONTROL <MPI>
ENGINE AND EMISSION CONTROL17-12
4. Check airtightness by applying a vacuum with
voltage applied directly from the battery to the
purge control solenoid valve and without applying
voltage.
5. Measure the resistance between the terminals of
the solenoid valve.
Standard value: 30 − 34 Ω (at 20°C)
FUEL VAPOUR CANISTER REMOVAL
AND INSTALLATION
M1173004200153
Battery voltage Normal condition
Applied Vacuum leaks
Not applied Vacuum maintained
Pre-removal and Post-installation Operation
Air Cleaner Assembly Removal and Installation (Refer to
GROUP 15 P.15-3).
AC208253
1 2 3
4
56
78
AD
Removal steps
1. Emission vacuum hose connection
2. Fuel vapour control line hose
3. Fuel vapour control check valve
4. Fuel vapour control line hose5. Fuel vapour control line clamp
6. Fuel vapour canister
7. Fuel high-pressure hose clamp
8. Fuel vapour canister bracketRemoval steps (Continued)

EMISSION CONTROL <MPI>
ENGINE AND EMISSION CONTROL17-15
EGR SYSTEM CHECKM1173002600348
1. Disconnect the vacuum hose (Green stripe) from
the EGR valve, and then connect a hand vacuum
pump via the three-way terminal.
2. When the engine is hot or cold, check the
condition of vacuum by racing the engine.
When engine is cold
(Engine coolant temperature: 20°C or less)
When engine is hot
(Engine coolant temperature: 80°C or higher)
3. Disconnect the three-way terminal.4. Connect the hand vacuum pump to the EGR
valve nipple.
5. Check whether the engine stalls or the idling is
unstable when a vacuum of 30 kPa or higher is
applied during idling.
EGR VALVE CHECKM1173002800223
1. Remove the EGR valve and inspect for sticking,
carbon deposits, etc. If found, clean with a
suitable solvent so that the valve seats correctly.
2. Connect a hand vacuum pump to the EGR valve.
3. Apply 67 kPa of vacuum, and check that the
vacuum is maintained.
4. Apply a vacuum and check the passage of air by
blowing through one side of the EGR passage. Throttle valve Normal vacuum condition
Open quickly No vacuum will generate (the
same as barometric pressure.)
Throttle valve Normal vacuum condition
Open quickly It will momentarily rise over 13
kPa
AK300780AB
<4G1>
EGR valve
Green stripe
Three-way
terminal
AK300781AB
<4G6>
EGR valve
Green stripe
Three-way
terminal
Vacuum Passage of air
5.3 kPa or less Air is not blown out
27 kPa or more Air is blown out
AK300782AB
<4G1>
EGR valve
Green stripe
AK300783AB
<4G6>
EGR valve
Green stripe
AKX00348

EMISSION CONTROL <MPI>
ENGINE AND EMISSION CONTROL17-16
5. Replace the gasket, and tighten to the specified
torque.
Tightening torque:
<4G1> 21 ± 4 N⋅m
<4G6> 20 ± 2 N⋅m
EGR PORT VACUUM CHECK <4G1>M1173002900167
1. Disconnect the vacuum hose (Green stripe) from
the throttle body EGR vacuum nipple and connect
a hand vacuum pump to the nipple.
2. Plug the vacuum hose (Green stripe).
3. Start the engine and check that, after raising the
engine speed by racing the engine, purge vacuum
raises according to engine speed.
NOTE: If there is a problem with change in
vacuum, the throttle body purge port may be
clogged and require cleaning.
EGR PORT VACUUM CHECK <4G6>M1173002900156
1. Disconnect the vacuum hose (White stripe) from
the throttle body EGR vacuum nipple and connect
a hand vacuum pump to the nipple.
2. Plug the vacuum hose (White stripe).
3. Start the engine.
4. Check that a fairly constant negative is generated
regardless of the engine speed.
5. If no negative pressure is generated, the port is
probably blocked and should be cleaned.
EGR CONTROL SOLENOID VALVE
CHECK <4G1>
M1173003100238
NOTE: When disconnecting the vacuum hose,
always make a mark so that it can be reconnected at
original position.
1. Disconnect the vacuum hose from the solenoid
valve.
2. Disconnect the harness connector.
3. Connect a hand vacuum pump to nipple (A) of the
solenoid valve (refer to the illustration at left).
4. Check air tightness by applying a vacuum with
voltage applied directly from the battery to the
EGR control solenoid valve and without applying
voltage.
AK300784AB
Green strip
AK201224AB
Vac-
uum
Engine speed (r/min)
AK300786AB
White stripe
Battery voltage Normal condition
Applied Vacuum leaks
Not applied Vacuum maintained
AK100011AC
Vac-
uum
Engine speed (r/min)
AKX00351
A
B
AE
Battery

EMISSION CONTROL <MPI>
ENGINE AND EMISSION CONTROL17-17
5. Measure the resistance between the terminals of
the solenoid valve.
Standard value: 29 − 35 Ω (at 20°C)
EGR CONTROL SOLENOID VALVE
CHECK <4G6>
M1173003100249
NOTE: When disconnecting the vacuum hose,
always make a mark so that it can be reconnected at
original position.1. Disconnect the vacuum hose from the solenoid
valve.
2. Disconnect the harness connector.
3. Connect a hand vacuum pump to nipple (A) of the
solenoid valve (refer to the illustration at left).
4. Check air tightness by applying a vacuum with
voltage applied directly from the battery to the
EGR control solenoid valve and without applying
voltage.
5. Measure the resistance between the terminals of
the solenoid valve.
Standard value: 29 − 35 Ω (at 20°C)
AKX00352
AK201251AB
A
B
C
Battery
Battery
voltageB nipple
conditionNormal condition
Not applied Open Vacuum
maintained
Applied Open Vacuum leaks
Closed Vacuum
maintained
AK100016

CROSSMEMBER
POWER PLANT MOUNT32-8
INSTALLATION SERVICE POINTS
>>A<< ENGINE FRONT ROLL STOPPER
BRACKET INSTALLATION
Install the engine front roll stopper bracket so that its
hole points towards the front side of the vehicle.
>>B<< ENGINE MOUNTING CUSHION
STOPPER INSTALLATION <4G6>
Install the engine mounting cushion stopper as
shown.
CROSSMEMBER
REMOVAL AND INSTALLATIONM1321003200368
CAUTION
•Before removing the steering wheel and air bag module assembly, always refer to GROUP 52B -
Service Precautions P.52B-5, Air bag Module and Clock Spring P.52B-210. Also, set the front
wheels so that they are facing straight forward, and remove the ignition key. If you fail to do this,
the SRS clock spring will be damaged, causing the SRS air bag to be inoperative and serious
injury.
•*
1: Indicates parts which should be initially tightened, and then fully tightened after placing the
vehicle horizontally and loading the full weight of the engine on the vehicle body.
•*
2: Indicates parts which should be temporarily tightened, and then fully tightened with the vehicle
on the earth in the unladen condition.
AC005918Front of vehicleHoleACAC304315ABFront of vehicle
HoleEngine mounting
cushion stopper
Pre-removal Operation
•Centermember Removal (Refer to P.32-7).
•Front Exhaust Pipe Removal (Refer to GROUP 15,
Exhaust Pipe and Main Muffler P.15-11).
•Steering Wheel Air Bag Module Assembly Removal
(Refer to GROUP 37, Steering Wheel P.37-17).
•Power Steering Fluid Draining (Refer to GROUP 37,
On-vehicle Service P.37-13).Post-installation Operation
•Front Exhaust Pipe Installation (Refer to GROUP 15,
Exhaust Pipe and Main Muffler P.15-11).
•Centermember Installation (Refer to P.32-7).
•Clock Spring Centring (Refer to GROUP 52B, Air Bag
Modules and Clock Spring P.52B-210).
•Steering Wheel Air Bag Module Assembly Installation
(Refer to GROUP 37, Steering Wheel P.37-17).
•Power Steering Fluid Supplying (Refer to GROUP 37,
On-vehicle Service P.37-13).
•Power Steering Fluid Line Bleeding (Refer to GROUP 37,
On-vehicle Service P.37-13).
•Press the dust cover with a finger to check whether the
dust cover cracked or damaged.
•Checking Steering Wheel Position with Wheels Straight
Ahead.
•Front Wheel Alignment Check and Adjustment (Refer to
GROUP 33, On-vehicle Service P.33-5).

STABILIZER BAR
FRONT SUSPENSION33-14
STABILIZER BAR
REMOVAL AND INSTALLATIONM1332004000468
CAUTION
•Before removing the steering wheel and air bag module assembly, refer to GROUP 52B, Service
Precautions P.52B-5 and Air Bag Module and Clock Spring P.52B-210. Also, put the front wheels in
straight-ahead position. Failure to do so may damage the SRS clock spring and render the SRS air
bag inoperative, which results serious driver injury.
•
*: Indicates parts which should be initially tightened, and then fully tightened after placing the
vehicle horizontally and loading the full weight of the engine on the vehicle body.
Pre-removal Operation
•Steering Wheel and Air Bag Module Assembly Removal
(Comfort: refer to GROUP 37, Steering Wheel
P.37-17/Sport: refer to GROUP 37, Steering Wheel
P.37-19).
•Clock Spring Removal (Refer to GROUP 52B, Air Bag
Modules and Clock Spring P.52B-210).
•Centermember Removal (Refer to GROUP 32, Engine
Roll Stopper, Centermember P.32-7).
•Front Exhaust Pipe Removal (Refer to GROUP 15,
Exhaust Pipe and Main Muffler P.15-11).Post-installation Operation
•Front Exhaust Pipe Installation (Refer to GROUP 15,
Exhaust Pipe and Main Muffler P.15-11).
•Centermember Installation (Refer to GROUP 32, Engine
Roll Stopper, Centermember P.32-7).
•Clock Spring Installation (Refer to GROUP 52B, Air Bag
Modules and Clock Spring P.52B-210).
•Steering Wheel and Air Bag Module Assembly Installation
(Comfort: refer to GROUP 37, Steering Wheel
P.37-17/Sport: refer to GROUP 37, Steering Wheel
P.37-19).
•Check the dust covers for cracks or damage by pushing it
with your finger.
•Checking Steering Wheel Position with Wheels Straight
Ahead
•Front Wheel Alignment Check and Adjustment (Refer to
P.33-5).