ECU MITSUBISHI LANCER EVOLUTION X 2008 User Guide

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)
TSB Revision
CIRCUIT DIAGRAMS90-186
MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)M1901007500123
FUSIBLE
LINK34
ETACS-
ECUFUSIBLE
LINK
36
AUDIO AMPLIFIER
AUDIO VISUAL NAVIGATION UNIT RELAY BOX
ENGINE
COMPARTMENT
HANDS FREE
SYSTEM REFER TO POWER
DISTRIBUTION
SYSTEM
AUDIO AMPLIFIER>
JOINT
CONNECTOR (3)

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)
TSB Revision
CIRCUIT DIAGRAMS90-187
ACC
RELAY 2 FUSIBLE
LINK
37
ROOF ANTENNA
ANTENNA AMPLIFIER
ANTENNA FEEDER CABLE ANTENNA FEEDER CABLE
ETACS-
ECU
SATELLITE RADIO
TUNER> IGNITION
SWITCH (ACC)
SATELLITE
RADIO TUNER
WIRE COLOR CODE
B : BLACK LG : LIGHT GREEN G : GREEN L : BLUE W : WHITE Y : YELLOW SB : SKY BLUE
BR : BROWN O : ORANGE GR : GRAY R : RED P : PINK V : VIOLET PU : PURPLE
REFER TO
POWER
DISTRIBUTION
SYSTEM
JOINT
CONNECTOR (3)

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)
TSB Revision
CIRCUIT DIAGRAMS90-189
INTERFACE
CIRCUITCAN DRIVE
CIRCUIT
DATA LINK
CONNECTOR ETACS-ECU
INTERFACE
CIRCUIT CAN DRIVE
CIRCUIT
ETACS-ECU
(FUSE )
5
WIRE COLOR CODE
B : BLACK LG : LIGHT GREEN G : GREEN L : BLUE W : WHITE Y : YELLOW SB : SKY BLUE
BR : BROWN O : ORANGE GR : GRAY R : RED P : PINK V : VIOLET PU : PURPLEJOINT
CONNECTOR
(CAN1)FUSIBLE
LINK
34IGNITION
SWITCH (IG1)
IG1
RELAY
REFER TO
POWER
DISTRIBUTION
SYSTEM
JOINT
CONNECTOR
(4)
FRONT SIDE

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)
TSB Revision
CIRCUIT DIAGRAMS90-191
SATELLITE
RADIO
TUNER (FUSE )
7ETACS-ECU
POWER
SUPPLY
WIRE COLOR CODE
B : BLACK LG : LIGHT GREEN G : GREEN L : BLUE W : WHITE Y : YELLOW SB : SKY BLUE
BR : BROWN O : ORANGE GR : GRAY R : RED P : PINK V : VIOLET PU : PURPLE
JOINT
CONNECTOR (CAN1)

55-1
GROUP 55
HEATER, AIR
CONDITIONING AND
VENTILATION
CONTENTS
GENERAL DESCRIPTION. . . . . . . . .55-2
HEATER AND AIR CONDITIONING
SYSTEM . . . . . . . . . . . . . . . . . . . . . . .55-4
HEATER CONTROL . . . . . . . . . . . . .55-6
A/C-ECU . . . . . . . . . . . . . . . . . . . . . . .55-7
A/C COMPRESSOR . . . . . . . . . . . . . .55-9
CONDENSER . . . . . . . . . . . . . . . . . . .55-9
DUCT. . . . . . . . . . . . . . . . . . . . . . . . . .55-10
VENTILATION SYSTEM . . . . . . . . . . .55-11

GENERAL DESCRIPTION
HEATER, AIR CONDITIONING AND VENTILATION55-2
GENERAL DESCRIPTIONM2551001500040
The blower, heater, and evaporator have been inte-
grated with the heater and A/C system to achieve a
greater fan power and noise reduction.
FEATURES
.
ENHANCEMENTS IN COMFORT
•With the adoption of fully-automatic A/C, the out-
side/inside air circulation switching, air outlet, and
outlet air temperature are automatically con
-
trolled according to the ambient temperature,
solar radiation, and passenger compartment tem
-
perature so that the optimum air conditioner is
achieved.
•By the adoption of clean air filter, the air quality
inside the passenger compartment has been
enhanced.
.
ENHANCEMENTS IN OPERATION
PERFORMANCE
•Operability has been enhanced by the adoption
of large triple dial.
•Customise function has been added for the
enhanced convenience.
.
ENHANCEMENTS IN FUEL ECONOMY
•The high efficiency compressor with a 2-step pro-
file oil separator has been installed, thus enhanc-
ing the fuel economy.
•The idle-up speed is controlled in two steps to
secure the air cooling performance during sum
-
mer and to enhance the fuel economy in the sea-
sons with moderate temperature.
•Enhancement of fuel economy by the cooling fan
control depending on the refrigerant pressure and
vehicle speed.
.
ENHANCEMENT IN SAFETY
•A/C system is stopped when the air bags are
deployed.
•Crushable space has been adopted to heater unit
to reduce the risk of passenger injuries in case of
a collision.
.
GLOBAL ENVIRONMENT PROTECTION
•New refrigerant system (HFC134a) has been
adopted.
•By the optimisation of A/C system, the refrigerant
charging amount has been reduced.
•Clean air filter media and its cover are separated
to reduce waste materials.
.
ENHANCEMENTS IN SERVICE QUALITY
•Reduction of refrigerant gas leakage and
enhancement in serviceability by incorporating
condenser and receiver
•Clean air filter is installed to the backside of glove
box to facilitate the filter replacement.
.
ENHANCEMENTS IN RESPONSIBILITY
Reliable information transmission is achieved by
connecting A/C-ECU and each ECU via CAN com
-
munication.
SPECIFICATIONS
ITEMSPECIFICATION
Air conditioning switch typeRotary type
Compressor typeMSC90CAS
Cooling output5.5 kw
Heating output5.7 kw
RefrigerantTy p eR134a (HFC-134a)
Charge quantity g (oz.)480 - 520 (16.9 - 18.3)

HEATER AND AIR CONDITIONING SYSTEM
HEATER, AIR CONDITIONING AND VENTILATION55-4
HEATER AND AIR CONDITIONING SYSTEMM2551001000614
HEATER UNIT ASSEMBLY
AC607858Blower motor Outside / inside air selection
damper control motor
Air mixing damper control
motor Air thermo sensorAB
Mode selection
damper control motor
A/C-ECUPower transistor Intake duct
Blower case
AC607857
Heater unit
Air mixing damper
Heater coreEvaporator Mode selection damper
Outside / inside air
selection damper
AB
Intake duct
Blower case
Clean air filter

HEATER AND AIR CONDITIONING SYSTEM
HEATER, AIR CONDITIONING AND VENTILATION55-5
The following new unit integrated blower, heater and
evaporator to increase the air flow, reduce noise, and
enhanced cooler and heater performance;:
•Integrated heater/cooling unit has been adopted
for large air flows and low noise.
•Crushable space has been secured to reduce the
risk of passenger injuries.
•Air mix damper that is also used as a reheating
prevention damper has been adopted to enhance
the air cooling performance.
•The A/C condensate water outlet (drain port) has
been installed to behind the evaporator to
restrain the clogging of drain by foreign materials.
•The outlet air temperature of the defroster has
been set lower than that of foot to prevent over
-
heating the driver’s face.
•Fin thermo sensor to directly measure evaporator
temperature reduces occurrence risk of an evap
-
orator freeze which will lead to the compressor
lock.
•Clean air filter has been introduced as standard
to protect the unit from the intrusion of foreign
materials (fallen leaves and others). and, it
removes the pollen and dust, and enhances the
air quality inside the passenger compartment.
•Clean air filter media and cover have been sepa-
rated to reduce the waste material amount gener-
ated during the filter replacement.
•The installation position of clean air filter has
been set to the backside of glove box to facilitate
the filter replacement operation. And, the
one-touch tab structure has been adopted for the
cover installation to enable the replacement oper
-
ation without tools.
OPERATION
.
CRUSHABLE SPACE
The evaporator and heater core has been longitudi-
nally installed in the vehicle length, and the crush-
able space has been adopted so that the structure
absorbs the impact in case of a collision and reduces
the risk of passenger injuries.
AC506490AB Front defroster
Side defrosterSide defrosterSide
outlet
Side
outlet Center
outlet
Heater core
Heater outlet
to compartment Recirculation
Fresh
Clean air filter
Blower motor
EvaporatorHeater outlet
AC506491
Crushable space
Crushable space
Front side
Drain port EvaporatorHeater coreAB

A/C-ECU
HEATER, AIR CONDITIONING AND VENTILATION55-7
A/C-ECUM2551001200265
CONTROL
.
FORCED DEF CONTROL
When air outlet position is switched to DEF, A/C is
automatically turned ON, and outside/inside air
selection damper is set to the fresh air position to
quickly defrost the windshield screen.
.
MAX A/C CONTROL
When the temperature adjustment knob is turned to
the maximum A/C position with the blower knob at
position other than OFF, the following controls are
made by the A/C-ECU.
NOTE: "*" Manual operation is disabled during max
A/C control.
.
MAX COOL, MAX HOT CONTROL

When the set temperature is at 18.0 °C <61°F>
(MAX COOL) or at 32.0
°C <89°F> (MAX HOT) with
the air outlet and air volume at the AUTO positions,
the following controls are made automatically by the
A/C-ECU.
NOTE: "*" indicates that when the automatic control
is not cancelled using the customise function, the
manual operation is disabled.
.
REAR WINDOW DEFOGGER TIMER
CONTROL
In order to prevent battery consumption, the defog-
ger is automatically turned OFF, 20 minutes after it is
turned ON.
.
IDLE-UP CONTROL
A/C-ECU and the engine ECU communicate with
each other through the CAN communication. The
idle-up speed of the engine is controlled in two steps
depending on the A/C load to secure the air cooling
performance during summer and to enhance fuel
economy in seasons with moderate temperature.
.
DETECTION CONTROL FOR
REFRIGERANT LEAKS
A/C-ECU determines if the refrigerant amount is less
than specified or refrigerant pressure is abnormal by
using the ambient temperature (ambient temperature
sensor to measure refrigerant inflation rate) and
refrigerant pressure (measured by the A/C pressure
sensor). When refrigerant amount or refrigerant pres
-
sure is judged abnormal, the compressor is cut-off to
protect the A/C system.
NOTE: When abnormality occurs, the A/C indicator
flashes.
.
PROTECTION CONTROL AT AIR BAG
DEPLOYMENT (DURING COLLISION)
When the air bag deployment is detected, the A/C
system is stopped.
.
CUSTOMISE FUNCTION
Depending on the user's preference, the following
functions can be selected. The programmed informa
-
tion is held even when the battery is disconnected.
•Automatic control for inside/outside air selection
Press and hold (approximately for 10 seconds)
the inside/outside air selection switch to cancel
the automatic control for inside/outside air selec
-
tion.
•A/C automatic control
Press and hold (approximately for 10 seconds)
the A/C switch to cancel the A/C automatic con
-
trol.
Subject to controlMAX COOL
Air mix damperMAX COOL position
Air outlet modeSelected position
Air volumeSelected position
Outside/inside air
selection damperAir recirculation position*
Air conditioner switchON*
Subject to
controlMAX COOLMAX HOT
Air mix
damperMAX COOL
positionMAX HOT
position
Air outlet
modeFACE positionFOOT position
Air volumeMaximumMaximum
Outside/insid
e air
selection
damperAir recirculation
position*Fresh air
position*
Air
conditioner
switchON*OFF*

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