Mitsubishi Eclipse. Manual - part 314

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-749

STEP 5. Check connector C-53 at ECM <M/T> or connector 
C-50 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES :  Go to Step 6.
NO :   Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

AK300417

34 33 32

36 35

37

42

45

31

39

38

46

40

41

43

44

CONNECTOR: C-53 <M/T>

C-53 (G)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300414

2

3

4

5

6

7

8

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11

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20

30

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22

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28

29

31

32

33

34

35

1

10

C-50 (GR)

CONNECTOR: C-50 <A/T>

AB

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-750

STEP 6. Measure the power supply voltage ECM connector 
C-53 <M/T> or PCM connector C-50 <A/T>.
(1) Disconnect the connector C-53 <M/T> or C-50 <A/T> and 

measure at the harness side.

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

AK300417

34 33 32

36 35

37

42

45

31

39

38

46

40

41

43

44

CONNECTOR: C-53 <M/T>

C-53 (G)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300414

2

3

4

5

6

7

8

9

11

12

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19

20

30

21

22

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28

29

31

32

33

34

35

1

10

C-50 (GR)

CONNECTOR: C-50 <A/T>

AB

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-751

(3) Measure the voltage between terminal No. 36 <M/T> or No. 

22 <A/T> and ground.

•  Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts) 

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

malfunction symptom is eliminated.

NO :  Check harness connectors C-28 at intermediate 

connector for damage, and repair or replace as 
required. Refer to GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. If intermediate connectors is in 

good condition, repair harness wire between 
combination meter connector C-41 (terminal No. 41) 
and ECM connector C-53 (terminal No. 36) <M/T> or 
PCM connector C-50 (terminal No. 22) <A/T> 
because of open circuit. Then confirm that the 
malfunction symptom is eliminated.

AK000381

<M/T>

C-53 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK

31

32

33

34

35

36

37

38

39

40

41

42

43

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45

46

AK000377AN

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31

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33

34

35

<A/T>

C-50 HARNESS 
CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-752

INSPECTION PROCEDURE 4: The Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check 
Engine Lamp) Remains Illuminated and Never Goes Out.

AK201266

44 45

41

46 47

42 43

49 50 5152

48

55 56

54

53

3

2

4 5 6

1 2 3
4 5 6

GREEN

1

RED-

YELLO

W

RED-

YELLO

W

BLA

CK-

WHITE

R

IG2

ST

LOCK

ACC

IG1

    C-111
MU801331

IGNITION
SWITCH

Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) Circuit

C-87

2

6

25

JUNCTION
BLOCK

52

C-41

41

C-28

MALFUNCTION INDICATOR LAMP 
(SERVICE ENGINE SOON OR 
 CHECK ENGINE LAMP)

C-53 <M/T>

(MU803771)

C-50 <A/T>

(MU803784)

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

21

36 <M/T>
22 <A/T>

7 8

5

3 4

35

34

10 11 12

2122 23 24

13 14 15

25 26 27

16

28

17

18 19 20

29

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36 37

38

9

1 2

6

34

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32

36

35

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43 44

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11 12 13 14 15 16 17 18 19 20

30

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3132 33

34 35

1

10

1

6

4 5

11

10

1213

15

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14

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18

8 9

7

20

2 3

2122 23 2425 26 27 28

C-108

23

7.5A