2008 MITSUBISHI LANCER EVOLUTION X heater

A/C-ECU
HEATER, AIR CONDITIONING AND VENTILATION55-8
COMMUNICATION
A/C-ECU performs the signal transmission and
reception with each ECU via CAN (Controller Area
Network)*
1. Also, with the heater control panel, it
transmits and receives signals via serial communica
-
tion.
NOTE: : For details of CAN communication, refer to
GROUP 54C
− Controller Area Network P.54C-2.
CAN COMMUNICATION INPUT SIGNALS TABLE
DIAGNOSTIC FUNCTION
A/C-ECU has the following functions for easier sys-
tem checks.
•DIAGNOSTIC FUNCTION
•Service data output
•Actuator test
NOTE: For each item, refer to the Workshop Manual.
AC506202
ETACS-ECU Heater control panelSRS-ECU
Engine-ECU
Combination meter A/C-ECU
: Interactive communicationCAN communication
SERIAL communication
AC
SignalTransmitter ECU
Engine coolant temperature signalENGINE-ECU
Vehicle speed signal
Engine speed signal
Ambient temperature signalETACS-ECU
Wiper signal
Ignition key signal
Average ambient temperature signalCOMBINATION METER

A/C COMPRESSOR
HEATER, AIR CONDITIONING AND VENTILATION55-9
A/C COMPRESSORM2551001100268
HIGH EFFICIENCY COMPRESSOR WITH
INTEGRATED OIL SEPARATOR
High efficiency compressor with integrated oil sepa-
rator has been adopted to enhance fuel economy by
reducing the A/C operating rate.
MAGNETIC CLUTCH WITH THERMAL
FUSE
At the compressor lock, the thermal fuse integrated
in the magnet clutch is blown due to the frictional
heat against the compressor in order to reduce risk
of the drive belt breakage. The thermal fuse, together
with the coil, is coated with resin to enhance resis
-
tance to corrosion.
2-STEP PROFILE COMPRESSOR
The centre area of the scroll in the compressor pro-
vides 2-step profile, and thickness of area "B" shown
in the figure has been increased to enhance
strength. With this feature, thickness of area "A"
shown where lesser load is applied is reduced, thus
compressor performance is enhanced by compress
-
ing refrigerant even in central area, comparing to the
previous model.
CONDENSERM2551001400140
The condenser has been integrated with the radiator (cooling
module) to optimise ventilation and reduce weight.
AC507301
aa bbAA
BB
AC
Section a - aSection b - b Front viewFront view <2-step profile
compressor>
AC608768
Condenser
AB
Radiator

DUCT
HEATER, AIR CONDITIONING AND VENTILATION55-10
DUCTM2551001300358
The rear heater duct has been introduced, and the
air distribution ratio to front and rear seats has been
optimised in order to enhance the air heating perfor
-
mance for the rear seats, and to prevent the circula-
tion of cooled air back to the front seats. with rear duct>
AC608058
To front door window
(Side defroster)
Side ventilator
Center ventilatorTo windshield (Defroster)
To front door window
(Side defroster)
To passenger seat footwell
To driver seat footwell
To rear seat footwell
(Vehicle with rear duct)
To rear seat footwell
(Vehicle with rear duct)
Side ventilator
AB

VENTILATION SYSTEM
HEATER, AIR CONDITIONING AND VENTILATION55-11
VENTILATION SYSTEMM2551002000554
Fresh air is sucked from the front deck and
exhausted through the air outlet behind the rear
bumper. Optimizing areas of the outside air induction
hole and the air outlet enhances ventilated air
amount, reducing noise.
AC608060Rear ventilator ductAB

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)

13A-1
GROUP 13A
MULTIPORT FUEL
SYSTEM (MFI)
CONTENTS
GENERAL DESCRIPTION. . . . . . . . .13A-2
CONTROL UNIT. . . . . . . . . . . . . . . . .13A-6
SENSOR. . . . . . . . . . . . . . . . . . . . . . .13A-8
ACTUATOR . . . . . . . . . . . . . . . . . . . .13A-23
FUEL INJECTION CONTROL . . . . . .13A-29
IGNITION TIMING AND CONTROL FOR
CURRENT CARRYING TIME . . . . . .13A-35
THROTTLE VALVE OPENING ANGLE
CONTROL AND IDLE SPEED

CONTROL . . . . . . . . . . . . . . . . . . . . .13A-38
MIVEC (Mitsubishi Innovative Valve
Timing Electronic Control System) .13A-40
MULTIPORT FUEL INJECTION (MFI)
RELAY CONTROL . . . . . . . . . . . . . . .13A-45
FUEL PUMP RELAY CONTROL . . . .13A-46
STARTER RELAY CONTROL . . . . . .13A-47
HEATED OXYGEN SENSOR HEATER
CONTROL . . . . . . . . . . . . . . . . . . . . . .13A-49
A/C COMPRESSOR RELAY
CONTROL . . . . . . . . . . . . . . . . . . . . . .13A-50
GENERATOR CONTROL . . . . . . . . . .13A-51
EVAPORATIVE EMISSION CONTROL
SYSTEM INCORRECT PURGE FLOW
MONITOR . . . . . . . . . . . . . . . . . . . . . .13A-52
EXHAUST GAS RECIRCULATION
CONTROL . . . . . . . . . . . . . . . . . . . . . .13A-53
CONTROLLER AREA NETWORK
(CAN) . . . . . . . . . . . . . . . . . . . . . . . . .13A-53
EVAPORATIVE EMISSION PURGE
CONTROL . . . . . . . . . . . . . . . . . . . . . .13A-53
HC TRAP CATALYTIC CONVERTER
DETERIORATION MONITOR . . . . . . .13A-53
ON-BOARD DIAGNOSTICS . . . . . . . .13A-53

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

GENERAL DESCRIPTION
MULTIPORT FUEL SYSTEM (MFI)13A-4
Control System Diagram

AK604117
Fuel level
sensorFuel tank Air
inlet
2 Exhaust engine
oil control valve
1 Intake engine
oil control valve4 Manifold absolute pressure sensor
2 Intake air
temperature sensor
1 Mass airflow sensor
6 Intake
camshaft
position
sensor
7 Exhaust
camshaft
position
sensor
3 Throttle position
sensor (main/sub)
5 Evaporative emission
purge solenoid
3 Throttle actuator
control motor
12 Fuel tank differential
pressure sensor
13 Fuel tank
temperature
sensor10 Heated oxygen sensor (front)
11 Heated oxygen
sensor (rear)
8 Crankshaft position sensor5 Engine coolant
temperature sensor
9 Knock sensor
4 Injector
Fuel pump Fuel pressure
regulator Evaporative
emission
canister
6 Evaporative
emission
ventilation
solenoid
1 Mass airflow sensor
2 Intake air temperature sensor
3 Throttle position sensor (main/sub)
4 Manifold absolute pressure sensor
5 Engine coolant temperature sensor
6 Intake camshaft position sensor
7 Exhaust camshaft position sensor
8 Crankshaft position sensor
9 Knock sensor
10 Heated oxygen sensor (front)
11 Heated oxygen sensor (rear)
12 Fuel tank differential pressure sensor
13 Fuel tank temperature sensor
Ignition switch-IG
Ignition switch-ST
Power supply
CAN communication (input signal)1 Intake engine oil control valve
2 Exhaust engine oil control valve
3 Throttle actuator control motor
4 Injector
5 Evaporative emission purge solenoid
6 Evaporative emission ventilation
solenoid
Ignition coil, ignition power transistor
Multiport fuel injection (MFI) relay
Fuel pump relay
Starter relay
Throttle actuator control motor relay
Generator G terminal
Heated oxygen sensor heater
A/C compressor relay
Diagnostic output
CAN communication (output signal) SenseAct
Engine oil pressure switch
Power steering pressure switch
Generator FR terminal
Generator L terminal
Vehicle speed sensor Accelerator pedal position sensor (main/sub)
Decide
ECM
(with barometric
pressure sensor)
AB