Mitsubishi Montero Sport (2004+). Manual — part 347

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-801

DIAGNOSIS

STEP 1. Check harness connector C-90 at PCM for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

STEP 2. Measure the output voltage at PCM harness side
connector C-90.
(1) Disconnect the connector C-90 and measure at the harness

side.

(2) Start the engine and run at idle.
(3) Turn the A/C switch "ON."

(4) Measure the voltage between terminal No. 61 and ground.

• If atmospheric air temperature is 15°C (59°F) or less,

the voltage should measure 1 volt or less.

• If atmospheric air temperature is 18°C (64.4°F) or more,

the voltage should measure battery positive voltage.

(5) Turn the A/C switch "OFF."
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage within the specified range?

YES : Replace the PCM. Then confirm that the malfunction

symptom is eliminated.

NO : Refer to GROUP 55, Introduction to Heater, Air

Conditioning and Ventilation Diagnosis

P.55-5

.

AK103762

42

43

48

49

50

51

52

53

54

55

56

57

46 45 44

58

59

60

61

62

63

64

65

66

47

41

AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK103762

42

43

48

49

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51

52

53

54

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46 45 44

58

59

60

61

62

63

64

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66

47

41

AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01505AN

C-90 HARNESS CONNECTOR:
COMPONENT SIDE

41

42

43

44

45

46

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50

51

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66

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-802

INSPECTION PROCEDURE 27: A/C condenser fan is inoperative

.

CIRCUIT OPERATION

• The battery positive voltage is applied on the

PCM (terminal No. 18) from the condenser fan
control relay.

• When the PCM switches on its power transistor,

the condenser fan control relay coil is energized,
causing current to flow in the circuit.

.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )

• Malfunction of the condenser fan control relay.

• Malfunction of the condenser fan motor.

• Improper connector contact, open or short-cir-

cuited harness wire.

• PCM failed.

GREEN-

ORANGE

GREEN-

ORANGE

AK000629

A/C Condenser Fan Circuit

1 2 3 4 5
6 7 8 9 10

CONDENSER FAN
MOTOR RELAY

18

POWERTRAIN CONTROL
MODULE (PCM)

7

A-17
MU802645

10

2

3 4

5 6

7 8

9

11 12 13 14 15 16 17 18 19 20

30

21 22 23

24

25

26 27 28 29

31 32 33

34 35

1

C-89
(MU803784)

AK200044AB

CONNECTOR: A-17

A-17(B)

AK103738AD

CONNECTOR: C-89

PCM

C-89(GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-803

DIAGNOSIS

STEP 1. Check harness connector C-89 at PCM for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

STEP 2. Measure the output voltage at PCM harness side
connector C-89.
(1) Disconnect the connector C-89 and measure at the harness

side.

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

(3) Measure the voltage between terminal No. 18 and ground.

• Voltage should be battery positive voltage.

(4) Check the condenser fan condition.

• When the terminal No. 18 is disconnected, the fan

should step.

• When the terminal No. 18 is grounded by the jumper

cable, the fan should run.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage and fan condition normal?

YES : Replace the PCM. Then confirm that the malfunction

symptom is eliminated.

NO : Refer to GROUP 55, Introduction to Heater, Air

Conditioning and Ventilation Diagnosis

P.55-5

.

AK103914

2

3

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5

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11

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30

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26

27

28

29

31

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33

34

35

1

10

AB

CONNECTOR: C-89

C-89(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK103914

2

3

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5

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18

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20

30

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27

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31

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34

35

1

10

AB

CONNECTOR: C-89

C-89(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01506AE

C-89 HARNESS CONNECTOR:
COMPONENT SIDE

1

2

3

4

5

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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-804

INSPECTION PROCEDURE 28: Power supply system and ignition switch-IG system.

AK200195

Power Supply and Ignition Switch-IG Circuit

BLA

CK

BLA

CK

BLA

CK

WHITE-

BLA

CK

BLUE-GREEN

RED

RED

RED

WHITE-

BLA

CK

WHITE-

BLA

CK

WHITE-BLA

CK

BLA

CK-WHITE

BLA

CK-WHITE

4

LOCK

ACC

IG1

R

2

IG2

ST

IGNITION SWITCH

3

13

2

1

C-90

41

42

49

48

47

12

3

4

14

JUNCTION
BLOCK

66

98

C-91

JOINT
CONNEC-
TOR (5)

POWERTRAIN
CONTROL
MODULE (PCM)

MFI RELAY

POWER
SOURCE

BATTERY
BACKUP

FUSIBLE LINK(12)

71

76

77

72 73 74

75

79 80

78

81

87 88

89

91

90

92

97

98

82

93

83

94

84 85

95

86

96

C-91
(MU803782)

47

41

42 43

48 49 50 51 52 53 54 55 56 57

46

45

44

58

59

60 61 62 63

64 65 66

C-90
(MU803781)

1

10

2 3 4 5 6 7 8 9

11

12 13 14 15 16 17 18 19 20 21 22

23 24 25 26 27 28 29 30 31 32 33

C-14

C-59

1
3

2
4

D-08
(MU801342)

1 2 3
4 5 6

D-15

1

2

3

4