Mitsubishi Outlander (2003+). Manual — part 564

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-71

STEP 4. Connector check: C-27 A/C-ECU
connector and C-123 photo sensor connector.

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Repair or replace the connector.

STEP 5. Check the wiring harness between C-123
photo sensor connector (terminal 1, 2) and C-27
A/C-ECU connector (terminal 19, 9).

•

Check the photo sensor signal lines for open or
short circuit.

Q: Is the check result normal?

YES :

Replace the Photo sensor.

NO :

Repair the wiring harness.

AC308718

Connector: C-27

AU

C-27(B)

<LHD>

8

2

10 9

1

5

3

4

6

7

20191817161514131211

Harness side

AC308735

Connector: C-27

BB

C-27(B)

Harness side

<RHD>

8

2

10 9

1

5

3

4

6

7

20191817161514131211

AC308716

Connector: C-123

AZ

C-123

Harness side

<LHD>

1

2

AC308769

BE

C-123

Connector: C-123

<RHD>

1

2

Harness side

AC308718

Connector: C-27

AU

C-27(B)

<LHD>

8

2

10 9

1

5

3

4

6

7

20191817161514131211

Harness side

AC308735

Connector: C-27

BB

C-27(B)

Harness side

<RHD>

8

2

10 9

1

5

3

4

6

7

20191817161514131211

AC308716

Connector: C-123

AZ

C-123

Harness side

<LHD>

1

2

AC308769

BE

C-123

Connector: C-123

<RHD>

1

2

Harness side

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-72

INSPECTION PROCEDURE 7: The A/C indicator flashes.

CIRCUIT OPERATION
If the A/C indicator flashes then the possible causes
may be due to a defective A/C pressure system or
insufficient refrigerant gas.

TROUBLESHOOTING HINTS

•

Malfunction of the A/C pressure sensor

•

Malfunction of the outside thermo sensor

•

Malfunction of the A/C-ECU

DIAGNOSIS

STEP 1. Check the A/C pressure sensor
operation.

Refer to GROUP 55A, On vehicle service

−

A/C

pressure sensor check

P.55A-51

.

Q: Is the A/C pressure sensor operating properly?

YES :

Go to Step 2.

NO :

Replace the A/C pressure sensor.

STEP 2. Check the outside thermo sensor.

Refer to

P.55B-105

.

Q: Is the outside thermo sensor in good condition?

YES :

Go to Step 3.

NO :

Replace the air thermo sensor.

STEP 3. Check the refrigerant level.

Refer to GROUP 55A, On vehicle service

−

sight

glass refrigerant level test

P.55A-51

.

Q: Is the refrigerant level correct?

YES :

Replace the automatic air conditioner

control panel (A/C-ECU).

NO :

Correct the refrigerant level. (Refer to
GROUP 55A, On-vehicle Service

P.55A-56

).

A/C-ECU

A/C PRESSURE
SENSOR

OUTSIDE
THERMO
SENSOR

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

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-73

INSPECTION PROCEDURE 8: The inside/outside air changeover is impossible.

COMMENTS ON TROUBLE SYMPTOM
When inside air cannot be changed to outside air
vice versa even if its changeover switch is on, the
outside/inside air selection damper control motor
system may be defective.

Possible causes

•

Malfunction of the outside/inside air selection
damper control motor

•

Damaged the wiring harness or connectors

•

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

DIAGNOSIS

Step 1. MUT-II/III actuator test

Carry out the actuator test.

•

Item 13, 14: outside/inside air selection damper
control motor

Q: Does the blower motor work normally?

YES :

Replace the automatic air conditioner

control panel (A/C-ECU)

NO :

Go to Step 2.

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

(1) Disconnect the connector, and measure at the

wiring harness side.

A/C-ECU

IGNITION
SWITCH (IG2)

MOTOR DRIVE
CIRCUIT

OUTSIDE/INSIDE AIR
SELECTION DAMPER
CONTROL MOTOR

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 Circuit

AC308739

AH

C-311

Connector: C-311

<LHD>

Harness side

6

2

7

3

5 4

1

AC308739

AG

C-311

Connector: C-311

<RHD>

Harness side

6

2

7

3

5 4

1

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-74

(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

AH

C-311

Connector: C-311

<LHD>

Harness side

6

2

7

3

5 4

1

AC308739

AG

C-311

Connector: C-311

<RHD>

Harness side

6

2

7

3

5 4

1