Mitsubishi Outlander (2003+). Manual - part 528

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-7

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 7 and 

body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

 Go to Step 5.

NO : 

 Go to Step 3.

STEP 3. Connector check: C-311 outside/inside 
air selection damper control motor connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the connector.

AC301541

6

2

7

3

5 4

1

BT

Connector C-311
(Harness side)

AC308739

Connector: C-311

Harness side

AI

6

2

7

3

5 4

1

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-8

STEP 4. Check the wiring harness between C-311 
outside/inside air selection damper control motor 
connector terminal No.7 and the ignition switch 
(IG2).

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connector C-10, junction block connectors 
C-205 and C-203, and repair if necessary.

•

Check the outside/inside air selection damper 
control motor power supply line for open circuit.

Q: Is the check result normal?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00, How to 
Cope with Intermittent Malfunction 

P.00-6

).

NO : 

Repair the wiring harness.

STEP 5. Check the outside/inside air selection 
damper control motor

Refer to 

P.55A-67

.

Q: Does outside/inside air selection damper control 

motor work normally?

YES : 

Go to Step 6.

NO : 

Replace the outside/inside air selection 
damper control motor.

STEP 6. Connector check: C-311 outside/inside 
air selection damper control motor connector 
and C-06 A/C-ECU

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the connector.

AC308739

Connector: C-311

Harness side

AI

6

2

7

3

5 4

1

AC301397

Connector: C-10

AM

4

3

5 6

1

7

2

AC210475

Connectors: C-203, C-205

AR

Junction Block (Front View)

C-205

C-203

Harness side

C-203

C-205

4

6 5

3

2

1

21

7

16 15

17

18

20 19

1

2

3

4

5

6

23 22

24

25

28

26

27

9

8

10

11

14

12

13

AC308739

Connector: C-311

Harness side

AI

6

2

7

3

5 4

1

AC301397

Connector: C-06

AN

9

1

15

7

4

12 1110

2

3

13

5

14

6

16

8

C-06(B)

Harness side

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-9

STEP 7. Check the wiring harness between C-311 
outside/inside air selection damper control motor 
connector (terminals 6 and 4) and A/C-ECU C-06 
(terminals 2 and 3).

NOTE: Prior to the wiring harness inspection, check 
intermediate connector C-10, and repair if necessary.

•

Check the outside/indside air selection damper 
control motor earth line for open or short circuit.

Q: Is the check result normal?

YES : 

Replace the manual air conditioner control 

panel (A/C-ECU).

NO : 

Repair the wiring harness.

AC308739

Connector: C-311

Harness side

AI

6

2

7

3

5 4

1

AC301398

Connectors: C-06, C-10

4

3

5 6

1

7

2

BD

9

1

15

7

4

12 1110

2

3

13

5

14

6

16

8

C-06(B)

Harness side

C-10

C-06

C-10

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-10

INSPECTION PROCEDURE 3: When the A/C is Operating, Temperature Inside the Passenger 
Compartment does not Decrease (Cool Air is not Emitted).

COMMENTS ON TROUBLE SYMPTOM
If cool air is not distributed when the A/C switch is on, 
the air thermo sensor or the A/C compressor relay 
system may be defective.

TROUBLESHOOTING HINTS

•

Improper amount of refrigerant

•

Malfunction of the air thermo sensor 

•

Malfunction of the A/C pressure sensor

•

Malfunction of the A/C compressor relay

•

Malfunction of the A/C refrigerant temperature 

switch

NOTE

: 4G63
: 4G69

BATTERY

A/C COMPRESSOR
RELAY

ENGINE-
ECU

A/C
COMPRESSOR 
ASSEMBLY

AIR THERMO
SENSOR

AIR THERMO
SENSOR

A/C
REFRIGERANT
TEMPERATURE
SWITCH

MAGNETIC
CLUTCH

A/C-ECU

A/C
PRESSURE
SENSOR

(OUTLET SIDE)

(INLET SIDE)

RESISTOR

IGNITION 
SWITCH (IG2)

RELAY
BOX

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   

A/C Compressor and Air Thermo Sensor Circuit

2400

2000