Mitsubishi Outlander (2003+). Manual - part 531

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-19

STEP 18. Measure the voltage at C-06 A/C-ECU 
connector.

(1) Disconnect A/C-ECU connector C-06, and 

measure at the wiring harness side.

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

(3) Disconnect engine-ECU connector C-134, and 

earth terminal 8. <2000>

(4) Disconnect engine-ECU or engine-A/T-ECU 

connector C-139, and earth terminal 8. <2400>

AC308718

Connector: C-06 <LHD>

AZ

9

1

15

7

4

12 1110

2

3

13

5

14

6

16

8

C-06(B)

Harness side

AC309474AB

Connector: C-134 <2000>

Harness side

22

9

14

15

2 1

3

16

1918

5 4

17

6

21

7

20

8

25

12

10

23

11

24

26

13

JAE-E

AC309486

Connector: C-139 <2400-LHD>

AC

Harness side

C-139 (GR)

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-20

(5) Measure the voltage between terminal 7 and 

body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

 Go to Step 21.

NO : 

 Go to Step 19.

STEP 19. Connector check: B-18X A/C 
compressor relay connector and C-06 A/C-ECU 
connector

Q:  Is the check result normal?

YES : 

Go to Step 20.

NO : 

Repair the connector.

AC301541BX

Connector C-06
(Harness side)

9

1

15

7

4

121110

2

3

13

5

14

6

16

8

AC309476AB

Front of 
vehicle

Relay box side

1

3

2

4

B-18X

-

Connector: B-18X

AC308718

Connector: C-06 <LHD>

AZ

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-21

STEP 20. Check the wiring harness between 
B-18X A/C compressor relay connector terminal 
No.1 and C-06 A/C-ECU connector terminal No.7.

NOTE: Prior to the wiring harness inspection, check 
intermediate connector C-104, and repair if neces-
sary.

•

Check the A/C compressor relay output line for 
open or short 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.

AC309476AB

Front of 
vehicle

Relay box side

1

3

2

4

B-18X

-

Connector: B-18X

AC308719

AR

Connectors: C-06, C-104 <LHD>

C-06(B)

C-06

9

1

15

7

4

121110

2

3

13

5

14

6

16

8

Harness side

C-104(B)

15

1
8

3

10

2
9

11

4

13

12

5

14

16

7

6

C-104

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-22

STEP 21. Measure the voltage at C-06 A/C-ECU 
connector. 

(1) Disconnect the connector, and measure at the 

wiring harness side.

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

(4) Measure the voltage between terminal 8 and 

body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

 Go to Step 24.

NO : 

 Go to Step 22.

STEP 22. Connector check: C-11 resistor 
connector and C-06 A/C-ECU connector

Q:  Is the check result normal?

YES : 

Go to Step 23.

NO : 

Repair the connector.

AC308718

Connector: C-06 <LHD>

AZ

9

1

15

7

4

12 1110

2

3

13

5

14

6

16

8

C-06(B)

Harness side

AC301541BY

Connector C-06
(Harness side)

9

1

15

7

4

121110

2

3

13

5

14

6

16

8

AC308719

Connectors: C-06, C-11 <LHD>

C-06(B)

C-06

C-11

AS

9

1

15

7

4

121110

2

3

13

5

14

6

16

8

1
3

2

4

C-11

Harness side

Harness side