Mitsubishi Eclipse. Manual - part 296

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-677

DIAGNOSIS

STEP 1. Measure the voltage at generator intermediate 
connector B-13 by backprobing.
(1) Do not disconnect the connector B-13.
(2) Start the engine and run at idle.

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

backprobing.

a. Engine: warming up
b. Radiator fan: stopped

c. Headlight switch: OFF to ON

d. Rear defogger switch: OFF to ON
e. Stoplight switch: OFF to ON

• Voltage should be drops.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?

YES : Go to Step 2.
NO :  Go to Step 4.

STEP 2. Check connector B-13 at generator intermediate 
connector for damage.
Q: Is the connector in good condition?

YES : Go to Step 3.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 11.

STEP 3. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Procedure 6 − 

Other Monitor 

P.13A-5

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0622 set?

YES : Replace the ECM or PCM. Then go to Step 11.
NO :  It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

P.00-6

.

AK300739

CONNECTOR: B-13

AB

B-13 (B)

3

4

7

8

1

2

5

6

HARNESS CONNECTOR:
COMPONENT SIDE

AK000262

B-13 HARNESS 
CONNECTOR: 
HARNESS SIDE

1 2 3 4
5 6 7 8

AE

AK300739

CONNECTOR: B-13

AB

B-13 (B)

3

4

7

8

1

2

5

6

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-678

STEP 4. Check connector B-13 at generator intermediate 
connector for damage.
Q: Is the connector in good condition?

YES : Go to Step 5.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 11.

STEP 5. Check connector B-45 at generator connector 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 go to Step 11.

STEP 6. Measure the voltage at generator harness side 
connector B-45.
(1) Disconnect the connector B-45 and measure at the harness 

side.

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

(3) Measure the voltage between terminal No. 4 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 : Go to Step 9.
NO :  Go to Step 7.

AK300739

CONNECTOR: B-13

AB

B-13 (B)

3

4

7

8

1

2

5

6

HARNESS CONNECTOR:
COMPONENT SIDE

AK300740

2

1

3

4

CONNECTOR: B-45

AB

B-45 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK300740

2

1

3

4

CONNECTOR: B-45

AB

B-45 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000263

B-45 HARNESS
CONNECTOR:
COMPONENT SIDE

1

2

3

4

AO

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-679

STEP 7. Check connector C-53 at ECM <M/T> or connector 
C-54 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Go to Step 8.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 11.

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

AK300412

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

C-54 (GR)

CONNECTOR: C-54 <A/T>

AB

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-680

STEP 8. Check for open circuit and short circuit to ground 
between generator connector B-45 (terminal No. 4) and 
ECM connector C-53 (terminal No. 41) <M/T> or PCM 
connector C-54 (terminal No. 54) <A/T>.
Q: Is the harness wire in good condition?

YES : Replace the ECM or PCM. Then go to Step 11.
NO :  Repair it. Then go to Step 11.

AK300740

2

1

3

4

CONNECTOR: B-45

AB

B-45 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

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

AK300412

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

C-54 (GR)

CONNECTOR: C-54 <A/T>

AB

HARNESS CONNECTOR:
COMPONENT SIDE