lock MITSUBISHI LANCER EVOLUTION X 2008 User Guide

BASE ENGINE
ENGINE MECHANICAL11A-14
VALVE TAPPETS
To adjust the valve lift, 47 sizes of valve tappets are
available in 0.015 mm (0.0006 in) increments, from
3.000 mm (0.1181 inch) to 3.690 mm (0.1453 in).
MIVEC (MITSUBISHI INNOVATIVE VALVE TIMING ELECTRONIC CONTROL SYSTEM)
The MIVEC consists of the parts shown in the illus-
tration.
This system continuously varies and optimally con-
trols the opening and closing timing of the individual
intake and exhaust valves, in order to improve torque
and power output in all speed ranges.
AK502503
Identification
markThickness
AD
AK503014
Exhaust V.V.T. sprocket
Section A-ASection B-B
Engine oil control
valve filter
Intake V.V.T. sprocket
Cylinder head
Cylinder blockB
B
Engine oil
control valve
Cylinder head
Cylinder block A
A
AE
Engine oil
control valve

AUTO-CRUISE CONTROL SYSTEM
ENGINE AND EMISSION CONTROL17-3
AC611102 AC611098
AC611099
AC611100
AC606956
AC611101
Auto-cruise
control switch
Data link connector
Hood
lock
release
handle
AD
Clutch switch
Stoplight switch
Accelerator pedal
[Built-in accelerator
pedal position sensor
(APP sensor)] Engine control
module (ECM)"CRUISE" indicator light
Transaxle control
module (TCM)
Brake pedal
assembly
Throttle body
[Built-in throttle position sensor
(TP sensor) and
throttle actuator control motor
(TAC motor)]
Transmission
range switch

Vehicle speed
sensor

AUTO-CRUISE CONTROL SYSTEM
ENGINE AND EMISSION CONTROL17-5
CONSTRUCTION AND OPERATIONM2170002000232
SYSTEM OUTLINE
The ECM calculates the auto-cruise control system
operation status when the ECM receives input sig
-
nals from the auto-cruise control switch, vehicle
speed and cancel system [stoplight switch and clutch
switch or transmission range switch ]. The engine control section sends the target acceler
-
ator pedal opening angle value for auto-cruise con-
trol system, the TCM issues a command to transaxle
control , and the gauge issues an ON/OFF
command for the "CRUISE" indicator light.
In the engine control section, the target throttle valve
opening angle value is calculated from the target
accelerator pedal opening angle value for
auto-cruise control system and the actual accelerator
angle value.The vehicle speed is then controlled by
applying the TAC motor.
BLOCK DIAGRAM
Throttle position sensor (TP sensor)Informs the ECM of the throttle valve opening angle.
Transaxle control module (TCM) •Based on the transaxle control signal from the
ECM, it controls the transaxle.
•Outputs the signal from the secondary pulley
speed sensor to the ECM.
•Transmits the selector lever "N" position signal
from the transmission range switch to the ECM.
Vehicle speed sensor Transmits the vehicle speed signal proportional to
the vehicle speed to the ECM.
Component Function
TAC motor Target accelerator
pedal opening
angle signal
Engine control section
Cruise control section"CRUISE" indicator light
AC611103
Actual accelerator
pedal opening
angle signal
Shift control
signal
Target throttle
valve opening
angle signal
Auto-cruise control switch
ECM
Stoplight switch, clutch switch
TCM
"CRUISE"
indicator light
ON/OFF signal
APP sensor
Transmission
range switch
signal Shift control
signal
TransaxleTransmission
range switch
signal
Secondary
pulley speed
sensor signal
ON/OFF
signalON/OFF
signal
Vehicle speed
sensor
Vehicle
speed
signal
Secondary
pulley speed
sensor signal

AUTO-CRUISE CONTROL SYSTEM
ENGINE AND EMISSION CONTROL17-7
FAIL-SAFE FUNCTION
When any of the following conditions are satisfied,
the auto-cruise control system function is stopped
until the system returns to normal. Also, when any of
the conditions are satisfied during the constant
speed driving, the constant speed driving is can
-
celled immediately.
•An abnormality occurs to the auto-cruise control
switch.
•An abnormality occurs to the stoplight switch.
When any of the following conditions are satisfied,
stop the vehicle once and turn the ignition switch to
"LOCK" (OFF). Otherwise, even when the system
returns to normal, the auto-cruise control system
function will continue to be stopped. Also, when any
of the conditions are satisfied during the constant
speed driving, the constant speed driving is can
-
celled immediately.
•ECM abnormality
•TP sensor abnormality
•APP sensor abnormality
.
DIAGNOSIS FUNCTION
•The diagnostic trouble code check is possible
with the "CRUISE" indicator light.
•To facilitate the system check, check the service
data output with the M.U.T.-III.
NOTE: For diagnostic items, service data output
items, and check method, refer to the Service Man
-
ual.

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-13
EXHAUST GAS RECIRCULATION (EGR) VALVE
An EGR valve is installed in the EGR valve support.The EGR
valve controls EGR flow volume using the stepper motor
method and reduces exhaust gas (NOx) and fuel consumption.
The EGR valve drives the stepper motor based on the signal
from ECM. When stepper motor rotor turns in clockwise or
anti-clockwise direction, the shaft fitted with a rotor and a screw
expands and contracts and the movement of the shaft causes
the valve to go up and down. Thus, EGR path gap is controlled
minutely. The stepper motor turns 15
° per step. The stepper
motor turns forward or back only up to the angle dictated by the
number of pulse signals (number of steps) from the ECM. In
other words, increase and decrease of the EGR flow volume
depends on the number of signals (number of steps) from
ECM. ECM changes current flow to the 4 coils (A, B, C, D) in
the stepper motor in sequence according to the phase pattern
in the following chart in order to turn the stepper motor rotor.
Open valve changes phase in order of 0
→ 1 → 2 → 3 → 0. Close
valve changes phase in order of 3
→ 2 → 1 → 0 → 3.
Phase
numberStepper motor coil
Coil ACoil BCoil CCoil D
0ONOFFOFFON
1ONOFFONOFF
2OFFONONOFF
3OFFONOFFON
AK604144
Coil
Shaft
Valve Outlet
Inlet
Rotor
Magnet
AB
AK604145
From MFI relay
EGR valve
(stepper motor)
ECM Coil
ACoil
BCoil
CCoil
DFlow rate
Step
AB

WATER PASSAGE
ENGINE COOLING14-3
WATER PASSAGEM2140004000172
NOTE: EGR: Exhaust Gas Recirculation
CVT: Continuously Variable Transmission
WAT E R P U M PM2140003000168
The water pump is the centrifugal, impeller type that
is installed in front of the cylinder block. It is driven by
the drive belt.
AK603624
Water pump
EGR
AB
Thermostat
Radiator Throttle body
CVT oil
coolerHeater
Water pump
EGR
Thermostat
Radiator Throttle body
CVT oil
cooler Heater
AK503034
Impeller
AD
ItemSpecifications
Discharge volume L/min185
Impeller diameter mm (in)62 (2.4)
Pulley outer diameter mm
(in)137 (5.4)

GENERAL DESCRIPTION
MULTIPORT FUEL SYSTEM (MFI)13A-3
System Block Diagram
AK604116
Mass airflow sensor
Intake air temperature sensor
Intake camshaft position
sensor
Exhaust camshaft position
sensor
Crankshaft position sensor Throttle position sensor (main)
Throttle position sensor (sub)
Accelerator pedal position
sensor (sub) Accelerator pedal position
sensor (main) Engine coolant temperature
sensor Manifold absolute pressure
sensor
Heated oxygen sensor (front)
Heated oxygen sensor (rear)
Power steering pressure
switch Engine oil pressure switch Generator L terminal
Ignition switch-ST
Power supply Ignition switch-IG
CAN communication
(input signal)
· A/C switch
· Vehicle speed
· Fuel level sensor
· Transmission range switch
Fuel tank differential pressure
sensor Heated oxygen sensor
(3rd)*
Knock sensor
Generator FR terminal
Fuel tank temperature sensor
Vehicle speed sensor Engine control unit Barometric pressure sensor
[1] Fuel injection control
[2] Ignition timing control
[3] Throttle valve opening angle
control and idle speed control
[4]
MIVEC (Mitsubishi Innovative
Valve timing Electronic Control
system)
[5] Power supply control
(Power supply to sensor,
actuator)
[6] Fuel pump relay control
[7] Starter relay control
[8] Heated oxygen sensor heater
control
[9] A/C compressor relay control
[10] Generator control
[11] Evaporative emission purge
control
[12] EGR control
[13] Diagnosis output
[14] RAM data transmission
CAN communication
(output signal) Intake engine oil control
valve
A/C compressor relay No. 2 injector
No. 3 injector
No. 4 injector
Heated oxygen sensor (front)
heater
Heated oxygen sensor (rear)
heater Throttle actuator control
motor
Throttle actuator control
motor relay No. 1 injector
No. 1 ignition coil
No. 2 ignition coi
No. 3 ignition coi
No. 4 ignition coi
Fuel pump relay
Generator G terminal Heated oxygen sensor (3rd)
heater*
Multiport fuel injection (MFI)
relay Exhaust engine oil control
valve
Evaporative emission ventilation
solenoid Evaporative emission purge
solenoid
EGR valve (stepper motor)*
Starter relay
AB
Sensor, switch Engine control module (ECM) Actuator
NOTE
*1: California

SENSOR
MULTIPORT FUEL SYSTEM (MFI)13A-15
This allows ECM precise feedback control to get theoretical
air-fuel ratio with best cleaning efficiency of 3-way catalytic con
-
verter.
.
CRANKSHAFT POSITION SENSOR
A crankshaft position sensor is installed on the right side of the
cylinder block. The crankshaft position sensor monitors rotation
of crankshaft sensing ring (36 teeth including 3 missing teeth)
installed on the crankshaft and converts to voltage (pulse sig
-
nal) that is output to ECM. ECM uses crankshaft position sen-
sor's output pulse to detect crankshaft position.
.
AK602263AC
100
0HC
CONOx 50 Purge ratio
Theoretical air fuel ratio
AK602576AC
From MFI relay
Heated xygen sensor
Heater
Zirconia elementECM
0.5V
AK602737AC
Crankshaft
position
sensor Crankshaft sensing ring
(36 teeth including 3 missing teeth)

SENSOR
MULTIPORT FUEL SYSTEM (MFI)13A-17
The intake camshaft position sensor uses a magnetic resis-
tance element. When the camshaft position sensing portion
passes the front surface of the magnetic resistance element,
the flux from the magnet passes the magnetic resistance ele
-
ment. Thus, resistance of the magnetic resistance element
increases. When the camshaft position sensing portion does
not pass the front surface of the magnetic resistance element,
the flux from the magnet does not pass the magnetic resistance
element and the resistance decreases. The intake camshaft
position sensor converts this change in resistance of the mag
-
netic resistance element to a 5 V pulse signal and outputs it to
ECM
.
EXHAUST CAMSHAFT POSITION SENSOR
The exhaust camshaft position sensor is installed on the right
side of the cylinder head. The exhaust camshaft position sen
-
sor monitors shape of the half-moon sensing portion and con-
verts to voltage (pulse signal) that is output to ECM. Upon
receiving this output voltage, the ECM effects feedback control
to optimize the phase of the exhaust camshaft. The structure
and system of this sensor are basically the same as intake
camshaft position sensor.
.
.
KNOCK SENSOR
A knock sensor is installed on the left side of the cylinder block.
Knock sensor uses the piezoelectric element to convert the
vibration of the cylinder block generated when engine is in
operation to minute voltage that is output to ECM. ECM uses
the minute output voltage from the knock sensor filtered
through the cylinder block's natural frequency to detect knock
-
ing, and compensates the ignition timing lag according to the
strength of the knocking.
AK602574AC
Camshaft position sensing portion
Camshaft position sensing portionMagnetic resistance element
Magnetic resistance elementMagnet flux
Magnet flux
AK602287
5V5V Camshaft position sensorECM
Output signal Magnetic resistance element
AC
AK602739
Piezoelectric element
AC

SENSOR
MULTIPORT FUEL SYSTEM (MFI)13A-18
.
BAROMETRIC PRESSURE SENSOR
A barometric pressure sensor is built into ECM. The barometric
pressure sensor is a semiconductor diffused pressure element
which outputs voltage to ECM according to atmospheric pres
-
sure. ECM uses this output voltage to sense the altitude of the
vehicle and compensates fuel injection volume to achieve the
appropriate air-fuel ratio for that altitude.
.
ENGINE OIL PRESSURE SWITCH
The engine oil pressure switch is installed on the left side of the
cylinder block. The engine oil pressure switch detects whether
the oil pressure is high or low using the contact switch. When
the oil pressure becomes higher than the specified value after
the engine starts, the contact point of the engine oil pressure
switch opens. This allows the ECM to detect the oil pressure is
higher than the specified value. The ECM outputs the OFF sig
-
nal to the combination meter through the CAN and then turns
off the oil pressure warning lamp.
AK602226AD
5V
Knock sensor
Piezoelectric elementECM
AK602575AC
Barometric pressure sensor
(built in ECM)
AK602587AC
Oil
pressure
Contact switch