Mitsubishi Outlander (2003+). Manual - part 527

GENERAL INFORMATION

HEATER, AIR CONDITIONER AND VENTILATION

55A-3

GENERAL INFORMATION

M1552000100403

The heater and air conditioner system incorporating 
the heater and cooling units has reduced ventilation 
resistance to increase air volume and reduce noise. 
The manual air conditioner is installed for 
LHD-Comfort model.

GENERAL SPECIFICATION

SERVICE SPECIFICATIONS

M1552000300399

LUBRICANTS

M1552000400363

Item

Specification

Heater unit type

Two-layer full blow air mix method

Heater control type

Rotary type

Air conditioner switch type

Push button type

Compressor type

Standard type

MSC90CA

Large capacity type

MSC105CA

Cooling output

5.5 kW

Heating output

5.0 kW

Item

Standard value

Idle speed r/min

2000

750 

±

 50

2400

700 

±

 50

Idle-up speed r/min 

850 

±

 50

Resistor (for blower motor) 

Ω

LO

2.54

ML

1.24

MH

0.6

Air gap (magnetic clutch) mm

0.3 

−

 0.5

Item

Specified lubricant

Quantity

Compressor refrigerant unit lubricant

MSC105CA

SUN PAG 56

140 mL

MSC90CA

SUN PAG 56

120 mL

Each connection of refrigerant line

SUN PAG 56

As required

Refrigerant

R134a (HFC-134a)

550 

±

 20 g

SPECIAL TOOLS

HEATER, AIR CONDITIONER AND VENTILATION

55A-4

SPECIAL TOOLS

M1552000600301

TROUBLESHOOTING

DIAGNOSIS TROUBLESHOOTING FLOW

M1552009600353

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

P.00-6

.

SYMPTOM CHART

M1552009900439

NOTE: Refer to GROUP 14, Trouble shooting for the 
condenser fan.

Tool

Tool number

Name

Application

MB991367

Special spanner

Armature mounting nut of 
compressor removal and 
installation

MB991386

Pin

MB991223
A:MB991219
B:MB991220
C:MB991221
D:MB991222

Harness set
A: Test harness
B: LED harness
C: LED harness adapter
D: Probe

Continuity check and voltage 
measurement at harness wire or 
connector
A: For checking connector pin 
contact pressure
B: For checking power supply 
circuit
C: For checking power supply 
circuit
D: For connecting a locally 
sourced tester

B991367

MB991223

A

B

C

D

AC

Symptom

Inspection 
Procedure

Reference 
Page

When the ignition switch is "ON" the A/C does not operate.

1

P.55A-5

Inside/outside air selection is not possible.

2

P.55A-6

When the A/C is operating, temperature inside the passenger 
compartment does not decrease (cool air is not emitted).

3

P.55A-10

Blower fan and motor do not turn.

4

P.55A-29

Blower air amount cannot be changed.

5

P.55A-36

The A/C indicator flashes.

6

P.55A-39

Defogger function does not operate.

7

P.55A-40

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-5

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: When the Ignition Switch is "ON" the A/C does not Operate.

COMMENTS ON TROUBLE SYMPTOM
The blower system or the compressor system may 
be defective if there is no cool air coming from the 
spit hole.

TROUBLESHOOTING HINTS

•

Malfunction of blower motor

•

Malfunction of A/C compressor

DIAGNOSIS

Check that the blower motor operation when the 
blower switch is moved to the "HI" position.
(1) Turn the ignition switch to the "ON" position.
(2) Turn the blower switch to the "HI" position.

Q: Does the blower motor operate when the blower 

switch is moved to the "HI" position?
YES : 

Refer to Inspection procedure 3 "When the 

A/C is operating, temperature inside the 
passenger compartment does not decrease 
(cool air not emitted) 

P.55A-10

."

NO : 

Refer to Inspection procedure 4 "Blower fan 
and motor do not turn 

P.55A-29

."

Defogger Timer function does not operate.

8

P.55A-46

Malfunction of the A/C-ECU power supply system.

9

P.55A-47

Condenser Fan does not operate.

10

Refer to 
GROUP 14 

P.14-3

Symptom

Inspection 
Procedure

Reference 
Page

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-6

INSPECTION PROCEDURE 2: Outside/Inside Air Selection is not possible.

COMMENTS ON TROUBLE SYMPTOM
If the outside/inside air selection damper motor does 
not operate normally, the outside/inside air selection 
damper motor system may be defective.

TROUBLESHOOTING HINTS

•

Malfunction of the outside/inside air selection 
damper motor

•

Damaged the wiring harness or connectors

•

Malfunction of the manual air conditioner control 
panel (A/C-ECU)

DIAGNOSIS

STEP 1. Check the defogger and A/C operations.

Q: Do the defogger and A/C work normally?

YES : 

Go to Step 2.

NO : 

Refer to Inspection procedure 9 
"Malfunction of the A/C-ECU power supply 
system 

P.55A-47

."

STEP 2. Measure the voltage at the C-311 
outside/inside air selection damper control motor 
connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

IGNITION 
SWITCH (IG2)

OUTSIDE/INSIDE 
AIR SELECTION 
DAMPER CONTROL MOTOR

A/C-ECU

Wire colour 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        

Outside/Inside Air Selection Damper Control Motor Circit

AC308739

Connector: C-311

Harness side

AI

6

2

7

3

5 4

1