Mitsubishi Outlander (2003+). Manual - part 547

SPECIAL TOOL

AUTOMATIC AIR CONDITIONER

55B-3

MB991955
A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991825
F: MB991826

MUT-III 
sub-assembly
A: Vehicle 
Communication 
Interface (V. C. I.)
B: MUT-III USB 
cable
C: MUT-III main 
harness A (Vehicles 
with CAN 
communication 
system)
D: MUT-III main 
harness B (Vehicles 
without CAN 
communication 
system)
E: MUT-III 
measurement 
adapter
F: MUT-III trigger 
harness

Automatic A/C check

CAUTION

MUT-III main harness B 
(MB991911) should be used. 
MUT-III main harness A should 
not be used for this vehicle.

MB991529

Diagnosis code 
check harness

Automatic A/C check with a 
voltmeter

Tool

Number

Name

Use

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

A

B

C

D

E

F

DO NOT USED

MB991529

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-4

TROUBLESHOOTING

DIAGNOSIS TROUBLESHOOTING FLOW

M1554004700102

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

P.00-6

.

DIAGNOSIS FUNCTION

M1554004800176

How to read diagnosis code

Connect the MUT-II/III to the 16-pin diagnosis 
connector to read diagnosis code (Refer to GROUP 
00, How to Use Troubleshooting/Inspection Service 
Points 

P.00-6

).

How to erase diagnosis code

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

P.00-6

.

DIAGNOSIS CODE CHART

M1554004900140

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

Tool

Number

Name

Use

MB991223

Code No.

Diagnostic item

Reference page

11

Interior temperature senor system (open circuit)

P.55B-5

12

Interior temperature sensor system (short circuit)

13

Outside thermo sensor system (open circuit)

P.55B-7

14

Outside thermo sensor system (short circuit)

15

Heater water temperature sensor system (open circuit)

P.55B-10

16

Heater water temperature sensor system (short circuit)

21

Air thermo sensor system (open circuit)

P.55B-13

22

Air thermo sensor system (short circuit)

31

Air mixing damper control motor and potentiometer sensor system

P.55B-16

32

Mode selection damper control motor and potentiometer sensor system

P.55B-19

41

Air mixing damper control motor and potentiometer activating system

P.55B-22

42

Mode selection damper control motor and potentiometer activating system

P.55B-25

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-5

DIAGNOSTIC TROUBLE CODE PROCEDURES

Diagnosis code No.11, 12: Interior temperature sensor system

COMMENTS ON TROUBLE SYMPTOM
This code is set when the interior temperature sensor 
circuit is open (Code No.11) or is short (Code No.12).

Possible causes

•

Malfunction of the interior temperature sensor

•

Damaged the wiring harness or connectors

•

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

DIAGNOSIS

Step 1. Check the interior temperature sensor.

Refer to 

P.55B-104

.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Replace the interior temperature sensor.

A/C-ECU

INTERIOR 
TEMPERATURE 
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   

Interior Temperature Sensor Circuit

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-6

Step 2. Connector check: C-27 A/C-ECU 
connector and C-127 interior temperature sensor 
connector

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the connector.

Step 3. Check the wiring harness between C-27 
A/C-ECU connector (terminals 1 and 20) and 
C-127 interior temperature sensor connector 
(terminals 2 and 1).

•

Check the sensor signal line and earth line for 
open or short circuit.

Q: Is the check result normal?

YES : 

Replace the automatic air conditioner 

control panel (A/C-ECU)

NO : 

Repair the wiring harness.

AC301397

Connector: C-27 
<LHD>

AX

C-27(B)

Harness side

8

2

10 9

1

5

3

4

6

7

20191817161514131211

AC308735

Connector: C-27 <RHD>

AY

C-27(B)

Harness side

8

2

10 9

1

5

3

4

6

7

20191817161514131211

AC301395AT

Connector: C-127 <LHD>

Harness side

2 1

AC308769

BB

Connector: C-127 <RHD>

Harness side

2 1

AC301397

Connector: C-27 
<LHD>

AX

C-27(B)

Harness side

8

2

10 9

1

5

3

4

6

7

20191817161514131211

AC308735

Connector: C-27 <RHD>

AY

C-27(B)

Harness side

8

2

10 9

1

5

3

4

6

7

20191817161514131211

AC301395AT

Connector: C-127 <LHD>

Harness side

2 1

AC308769

BB

Connector: C-127 <RHD>

Harness side

2 1