Mitsubishi Evolution X. Manual - part 70

NOTES

55-1

GROUP 55

HEATER, AIR 

CONDITIONING AND 

VENTILATION

CONTENTS

GENERAL DESCRIPTION. . . . . . . . .

55-2

HEATER AND AIR CONDITIONING 

 

SYSTEM . . . . . . . . . . . . . . . . . . . . . . .

55-6

HEATER CONTROL  . . . . . . . . . . . . .

55-8

A/C-ECU. . . . . . . . . . . . . . . . . . . . . . .

55-9

A/C COMPRESSOR . . . . . . . . . . . . . .

55-10

CONDENSER . . . . . . . . . . . . . . . . . . .

55-11

DUCT. . . . . . . . . . . . . . . . . . . . . . . . . .

55-11

VENTILATION SYSTEM. . . . . . . . . . .

55-12

GENERAL DESCRIPTION

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HEATER, AIR CONDITIONING AND VENTILATION

55-2

GENERAL DESCRIPTION

M2551001500084

The new HVAC unit integrates blower, and evapora-
tor, it increases the air flow but reduces air flow resis-
tance and air flow noise.

FEATURES

.

ENHANCEMENTS IN COMFORT

• With the adoption of automatic A/C system, the 

air inlets (fresh air/recirculation air), the vents, 
temperature at the vents and fan speed are auto-
matically controlled according to the outside tem-
perature and cabin temperature so that the 
optimum air conditioning is achieved.

• By the adoption of clean air filter, the air quality in 

the cabin has been kept.

.

ENHANCEMENTS IN OPERATION 
PERFORMANCE

• Operability has been enhanced by the adoption 

of large triple dial.

• Customize function has been added for the 

enhanced convenience.

.

ENHANCEMENTS IN FUEL ECONOMY

• The high efficiency compressor with a 2-step and 

the oil separator has reduced A/C system work-
load, thus enhancing 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 
moderate seasons.

• The cooling fan control depending on the refriger-

ant pressure and on the vehicle speed reduce 
alternator load, thus enhancing the fuel economy.

.

ENHANCEMENT IN SAFETY

• A/C system will shut down automatically if the air 

bags are open.

• Crushable space has been adopted into HVAC 

unit to reduce the risk of passenger injuries if a 
collision occurred.

.

GLOBAL ENVIRONMENT PROTECTION

• New refrigerant system (HFC134a) has been 

adopted.

• Clean air filter media and its cover are separated 

to reduce waste materials, when replacing the fil-
ter.

.

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

ITEM

SPECIFICATION

Air conditioning switch type

Rotary type

Compressor type

MSC90CAS

Cooling output

5.5 kw

Heating output

5.7 kw

Refrigerant

Type

R134a (HFC-134a)

Charge quantity g (oz.)

480 - 520 (16.9 - 18.3)

GENERAL DESCRIPTION

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HEATER, AIR CONDITIONING AND VENTILATION

55-3

CONSTRUCTION DIAGRAM

AC608755

AD

Interior temperature
sensor

AC608760

AB

Ambient air temperature sensor

AC708434

Heater unit

Liquid pipe

A/C pressure sensor

Suction 
flexible hose

Discharge 
flexible hose

Condenser

A/C compressor

AC

Low-pressure side valve

High-pressure 
side valve