Mitsubishi Eclipse. Manual - part 194

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-269

STEP 5. Measure power supply voltage at ECM connector 
C-56 <M/T> or PCM connector C-50 <A/T> by backprobing.
(1) Do not disconnect the connector C-56 <M/T> or C-50 

<A/T>.

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

AK300416

58

60

61

53 52 51

55 54

56

59

62

57

CONNECTOR: C-56 <M/T>

C-56 (G)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300414

2

3

4

5

6

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8

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11

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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-270

(3) Measure the voltage between terminal No. 60 <M/T> or No. 

3 <A/T> and ground by backprobing.

• 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 : Go to Step 8.
NO :  Go to Step 6.

AK000289

<M/T>

C-56 HARNESS 
CONNECTOR: 
HARNESS SIDE

5152 53 54 55 56

57 58 59 60 6162

AI

AK000290

1

2

3 4

5 6

7 8

9 10 111213 1415 16 17 18 19 20 21 22 23

24 25

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30 313233

34 35

AJ

C-50 HARNESS 
CONNECTOR: 
HARNESS SIDE

<A/T>

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-271

STEP 6. Check connector C-56 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 7.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 12.

AK300416

58

60

61

53 52 51

55 54

56

59

62

57

CONNECTOR: C-56 <M/T>

C-56 (G)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300414

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

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-272

STEP 7. Check for open circuit and short circuit to ground 
between heated oxygen sensor (front) connector B-17 
(terminal No. 3) and ECM connector C-56 (terminal No. 60) 
<M/T> or PCM connector C-50 (terminal No. 3) <A/T>.
Q: Is the harness wire in good condition?

YES : Replace the ECM or PCM. Then go to Step 12.
NO :  Repair it. Then go to Step 12.

AK300403

1

2

3

4

AB

B-17 (B)

HEATED OXYGEN
SENSOR (FRONT)

CONNECTOR: B-17

HARNESS 
CONNECTOR:
COMPONENT SIDE

AK300416

58

60

61

53 52 51

55 54

56

59

62

57

CONNECTOR: C-56 <M/T>

C-56 (G)

AB

HARNESS CONNECTOR:
COMPONENT SIDE