Mitsubishi Montero (2004+). Manual - part 656

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-113

STEP 3. Measure the voltage at condenser motor 
connector A-26. 

(1) Disconnect A/C compressor connector A-26 and measure 

the voltage at the harness side.

(2) Disconnect powertrain control module connector D-132.
(3) Turn the ignition switch to the "ON" position.

(4) Ground powertrain control module connector D-132 

(terminal 17). 

(5) Measure the voltage between terminal 1 and ground.

• The measured value should be approximately 12 volts 

(battery positive voltage).

Q: Does the measured voltage correspond with this range?

YES :  Go to Step 14.
NO :   Go to Step 4.

AC204167

CONNECTOR : A-26

AX

A-26(B)

A-26(B)

1

2

HARNESS SIDE

AC204171

CONNECTOR : D-132

D-132(GR)

D-132(GR)

AS

HARNESS SIDE

8

23

1110

24

9

6

22

7

16

17

15

3

4

1312

19

20
2726

2

1
5

14
21

25

18

AC205177

8

23

1110

24

9

6

22

7

16

17

15

3

4

13 12

19

20
27 26

2

1
5

14

21

25

18

HARNESS SIDE : D-132

AB

AC204738 CX

HARNESS SIDE : A-26

1

2

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-114

STEP 4. Measure the voltage at condenser fan control 
relay connector A-09X. 

(1) Disconnect condenser fan control relay connector A-09X 

and measure the voltage at the relay box side.

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

(3) Measure the voltage between terminal 3 and ground.

• The measured value should be approximately 12 volts 

(battery positive voltage).

Q: Does the measured voltage correspond with this range?

YES :  Go to Step 7.
NO :   Go to Step 5.

STEP 5. Check condenser fan control relay connector 
A-09X for damage.

Q:  Is condenser fan control relay connector A-09X in good 

condition?
YES : Go to Step 6.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. Check 

that the condenser motor works normally.

STEP 6. Check the wiring harness between condenser fan 
control relay connector A-09X (terminal 3) and the ignition 
switch (IG1).

AC204183

CONNECTOR : A-09X

AO

2 1

5

4

3

RELAY BOX SIDE

AC204738 CD

RELAY BOX SIDE : A-09X

2 1

5

4

3

AC204183

CONNECTOR : A-09X

AO

2 1

5

4

3

RELAY BOX SIDE

AC204183

CONNECTOR : A-09X

AO

2 1

5

4

3

RELAY BOX SIDE

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-115

NOTE: Also check intermediate connector D-28, joint connec-
tor (2) A-15, junction block connectors D-210 and D-208. If 
intermediate connector D-28, joint connector (2) A-15, junction 
block connectors D-210 or D-208 is damaged, repair or replace 
the connector as described in GROUP 00E, Harness Connec-
tor Inspection 

P.00E-2

.

Q: Is the wiring harness between condenser fan control 

relay connector A-09X (terminal 3) and the ignition 
switch (IG1) in good condition?
YES : Check that the air conditioning works normally.
NO :  Repair the wiring harness. Check that the air 

conditioning works normally.

AC204167

CONNECTOR : A-15

AD

14

13

4

1112

5

3

10

8 9

2

7

1

6

AC204170

CONNECTOR : D-28

AI

2 3

27

32

28

33

16

15

4 5

19

18

29

17

34

7 8

35

22

21

9 10

30

36

31

37

25

24

23

6

20

1

14

26

11

13

12

38

AC204191

CONNECTORS: D-208, D-210

D-208

AC

HARNESS SIDE

HARNESS SIDE

D-210

D-208

D-210

1

2

3

5

6

4

1

2

7 6

3

9

4

11

12

10

13

5

8

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-116

STEP 7. Measure the voltage at condenser fan control 
relay connector A-09X.
(1) Disconnect condenser fan control relay connector A-09X 

and measure the voltage at the relay box side.

(2) Measure the voltage between terminal 5 and ground.

• The measured value should be approximately 12 volts 

(battery positive voltage).

Q: Does the measured voltage correspond with this range?

YES :  Go to Step 10.
NO :   Go to Step 8.

STEP 8. Check condenser fan control relay connector 
A-09X for damage.

Q:  Is condenser fan control relay connector A-09X in good 

condition?
YES : Go to Step 9.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. Check 

that the air conditioning works normally.

STEP 9. Check the wiring harness between condenser fan 
control relay connector A-09X (terminal 5) and the fusible 
link (1).

AC204183

CONNECTOR : A-09X

AO

2 1

5

4

3

RELAY BOX SIDE

AC204738 CU

RELAY BOX SIDE : A-09X

2 1

5

4

3

AC204183

CONNECTOR : A-09X

AO

2 1

5

4

3

RELAY BOX SIDE

AC204183

CONNECTOR : A-09X

AO

2 1

5

4

3

RELAY BOX SIDE