Mitsubishi L200. Manual - part 855

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-36

Inspection Procedure 5: Condenser Fan does not Operate. <Vehicles with Condenser Fan>

Condenser Fan Motor Circuit

IGNITION 
SWITCH (IG2)

RELAY 
BOX

A/C CONDENSER 
FAN RELAY

CONDENSER 
FAN MOTOR

ENGINE-ECU

FUSIBLE 
LINK

20

Wire colour code 
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue 
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet     PU : Purple     SI : Silver

COMMENTS ON TROUBLE SYMPTOM
If the condenser fan does not function at all, the con-
denser fan motor circuit may be defective.

PROBABLE CAUSES

• Malfunction of A/C condenser fan motor

• Malfunction of A/C condenser fan relay

• Damaged harness wires and connectors

• Malfunction of engine-ECU

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-37

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-105 engine-ECU 
connector

AC509613 CD

Harness side

C-105 (B)

Connector: C-105 <LHD>

35

40

41

42

1817

38

39

15

16

14

3736

12

13

11

32

8

3433

9

10

30

31

7 6

29

5

4

28

3

27

2

26

1

25

19
43

2120

22

23

46

47

4544

24
48

76

52

86

62

63

64

65

66

67

68

69

70

71

72

92

95

96

93

94

89

90

91

8887

53

54

55

56

57

58

59

60

61

83

8584

8281

78

79

80

77

49

50

51

74

75

73

AC509930 CA

C-105 (B)

Connector: C-105 <RHD>

Harness side

35

40

41

42

1817

38

39

15

16

14

3736

12

13

11

32

8

3433

9

10

30

31

7 6

29

5

4

28

3

27

2

26

1

25

19
43

2120

22

23

46

47

4544

24
48

76

52

86

62

63

64

65

66

67

68

69

70

71

72

92

95

96

93

94

89

90

91

8887

53

54

55

56

57

58

59

60

61

83

8584

8281

78

79

80

77

49

50

51

74

75

73

Q:  Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the connector.

STEP 2. Check of the condenser fan motor circuit

AC509613 CD

Harness side

C-105 (B)

Connector: C-105 <LHD>

35

40

41

42

1817

38

39

15

16

14

3736

12

13

11

32

8

3433

9

10

30

31

7 6

29

5

4

28

3

27

2

26

1

25

19
43

2120

22

23

46

47

4544

24
48

76

52

86

62

63

64

65

66

67

68

69

70

71

72

92

95

96

93

94

89

90

91

8887

53

54

55

56

57

58

59

60

61

83

8584

8281

78

79

80

77

49

50

51

74

75

73

AC509930 CA

C-105 (B)

Connector: C-105 <RHD>

Harness side

35

40

41

42

1817

38

39

15

16

14

3736

12

13

11

32

8

3433

9

10

30

31

7 6

29

5

4

28

3

27

2

26

1

25

19
43

2120

22

23

46

47

4544

24
48

76

52

86

62

63

64

65

66

67

68

69

70

71

72

92

95

96

93

94

89

90

91

8887

53

54

55

56

57

58

59

60

61

83

8584

8281

78

79

80

77

49

50

51

74

75

73

ACA00423

35

40

41

42

1817

38

39

15

16

14

3736

12

13

11

32

8

3433

9

10

30

31

7 6

29

5

4

28

3

27

2

26

1

25

19
43

2120

22

23

46

47

4544

24
48

76

52

86

62

63

64

65

66

67

68

69

70

71

72

92

95

96

93

94

89

90

91

8887

53

54

55

56

57

58

59

60

61

83

8584

8281

78

79

80

77

49

50

51

74

75

73

Connector C-105 
(Harness side)

AC

(1) Disconnect the C-105 connector, and connect the 

terminal No. 21 on the harness side to the body 
earth.

(2) Turn the ignition switch to the "ON" position.
(3) Check that the condenser fan operates normally.

Q: Is the check result normal?

YES : 

Replace the engine-ECU.

NO : 

 Go to Step 3.

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-38

STEP 3. Connector check: A-14X A/C condenser 
fan relay connector

AC502574

AB

Connector: A-14X

Harness side

Q:  Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the connector.

STEP 4. Check the A/C condenser fan relay 
continuity.
 Refer to 

P.55A-66

.

Q: Is the A/C condenser fan relay in good condition?

YES : 

Go to Step 5.

NO : 

Replace the A/C condenser fan relay.

STEP 5. Voltage measurement at A-14X A/C 
condenser fan relay connector.

AC502574

AB

Connector: A-14X

Harness side

(1) Remove the relay, and measure at the junction 

block side.

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

AC402679

Connector A-14X 
(Harness side)

CJ

(3) Voltage between terminal 1 and body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

 Go to Step 7.

NO : 

 Go to Step 6.

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-39

STEP 6. Check the wiring harness between A-14X 
A/C condenser fan relay connector terminal No.1 
and the ignition switch (IG2).

AC502574

AB

Connector: A-14X

Harness side

NOTE: 

AC509934 AX

Connectors: C-207, C-210 <LHD>

Harness side

C-207

C-210

Junction block (Front view)

Harness side

C-207

C-210

AC509936 AU

Connectors: C-207, C-210 <RHD>

Harness side

C-207

C-210

Junction block (Front view)

Harness side

C-207

C-210

Prior to the wiring harness inspection, check junction 
block connectors C-210 and C-207, and repair if nec-
essary.

• Check the condenser fan relay 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 ).

NO : 

Repair the wiring harness.

STEP 7. Voltage measurement at A-14X A/C 
condenser fan relay connector.

AC502574

AB

Connector: A-14X

Harness side

(1) Remove the relay, and measure at the junction 

block side.

AC402679

Connector A-14X 
(Harness side)

CK

(2) Voltage between terminal 4 and body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

 Go to Step 9.

NO : 

 Go to Step 8.

STEP 8. Check the wiring harness between A-14X 
A/C condenser fan relay connector terminal No.4 
and the fusible link (20).

AC502574

AB

Connector: A-14X

Harness side

• Check the condenser fan relay 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 ).

NO : 

Repair the wiring harness.