Mitsubishi Eclipse. Manual - part 617

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1011

STEP 2. Check the output voltage at ECM harness side 
connector C-51 <M/T> or PCM harness side connector 
C-52 <A/T>.
(1) Disconnect the connector C-51 <M/T> or C-52 <A/T> and 

measure at the harness side.

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

(3) Measure the voltage between terminal 18 and ground.

• Voltage should be between 4.8 and 5.2 volts. (Fan 

rotates at high speed.)

(4) Connect a jumper cable between terminal No. 18 and 

ground.

• The fan should stop.

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

YES : Replace the ECM or PCM. Then confirm that the 

malfunction symptom is eliminated.

NO :  Go to Step 3.

AK300458

2

3

4

5

6

7

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11

12

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18

19

20

30

21

22

23

24

25

26

27

28

29

31

32

33

34

35

1

10

CONNECTOR: C-52 <A/T>

C-52 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300443

2

3

4

5

6

7

8

9

11

12

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16

17

18

19

20

30

21

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24

25

26

27

28

29

31

32

33

34

35

1

10

CONNECTOR: C-51 <M/T>

C-51 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK000368

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2

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5

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32

33

34

35

C-51<M/T>, C-52<A/T>
HARNESS CONNECTORS: 
COMPONENT SIDE

AE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1012

STEP 3. Check for open circuit and short circuit to ground 
and harness damage between fan controller A-30 (terminal 
No. 2) and ECM connector C-51 (terminal No. 18) <M/T> or 
PCM connector C-52 (terminal No. 18) <A/T>.

AK300451

1

2

3

CONNECTOR: A-30

AB

A-30 (GR)

HARNESS 
CONNECTOR:
COMPONENT SIDE

AK300458

2

3

4

5

6

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11

12

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16

17

18

19

20

30

21

22

23

24

25

26

27

28

29

31

32

33

34

35

1

10

CONNECTOR: C-52 <A/T>

C-52 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300443

2

3

4

5

6

7

8

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11

12

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16

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18

19

20

30

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27

28

29

31

32

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34

35

1

10

CONNECTOR: C-51 <M/T>

C-51 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1013

NOTE: Check harness after checking intermediate connector 
C-07. If intermediate connector is damaged, repair or replace 
them. Refer to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Then confirm that the malfunction symptom is elimi-

nated.
Q: Is the harness wire in good condition?

YES : Refer to 

− Engine Cooling Diagnosis − Symptom 

Chart 

P.14-3

.

NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1014

INSPECTION PROCEDURE 29: Power supply system and ignition switch 

− IG system.

AK103098

6

2 3

4 5 6

GREEN

1

1

3

2

4

1

4

8

7

2

6

3

5

5

BLA

CK-

ORANGE

BLA

CK-

ORANGE

BLA

CK-

ORANGE

RED-

WHITE

RED

RED

RED

WHITE-VIOLET

RED-

WHITE

RED-

WHITE

BLA

CK

BLA

CK

BLA

CK

BLA

CK

R

IG2

ST

LOCK

ACC

IG1

C-87

    C-111
MU801331

IGNITION
SWITCH

2

6

1

JUNCTION
BLOCK

99 <M/T>*2
98 <A/T>*4

     C-07
MU801333

C-07

60 <M/T>*1
66 <A/T>*3

MFI RELAY

1

2

4

3

57 <M/T>*1
49 <A/T>*3

BATTERY
BACKUP

47 <M/T>*1
47 <A/T>*3

59 <M/T>*1
41 <A/T>*3

POWER
SOURCE

58 <M/T>*1
48 <A/T>*3

46 <M/T>*1
42 <A/T>*3

ENGINE CONTROL MODULE (ECM) <M/T> OR POWERTRAIN CONTROL MODULE (PCM) <A/T>

3

3

NOTE
*1:ECM connector C-58 <M/T>
*2:ECM connector C-62 <M/T>
*3:PCM connector C-55 <A/T>
*4:PCM connector C-59 <A/T>

65

43
50

42
49

41

48
60 61

64

46 47
58 59
67 68

45

56
66

52

51

44

53

62

54

63

57

55

C-58 <M/T> (MU803782)

C-55 <A/T> (MU803781)

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

98

78

71

88 89

76 77

72
79

91

73
80

74

75

81

92

82 83
93

84 85

94

86 87

95 96

90

80

87

81

94

85

82

84

93

86

98

99

74

92

73

83

88

91

95

97

96

100

89

78

71

90

76 77

75

72
79

97

C-62 <M/T> (MU803783)

C-59 <A/T> (MU803782)

15 16

26 27 28 29

32 33 34

17 18 19 20 21 22 23 24 25

30 31

36 37

35

38

10

11 12 13

1 2 3

4 5 6 7 8 9

14

C-89

C-89

WHITE

WHITE

BATTERY

RELAY
BOX

9 20A

7.5A

RED-

WHITE

RED-

WHITE

8

C-07

Power Supply and Ignition Switch-IG Circuit

3 4

1 2

A-18X

BLA

CK

1

6

4 5

11

10

12 13 14

8 9

7

2 3

C-112

MU801857

17