Mitsubishi Eclipse. Manual — part 232

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-421

STEP 10. Check for short circuit to ground between
crankshaft position sensor connector B-20 (terminal No. 3)
and ECM connector C-60 (terminal No. 89) <M/T> or PCM
connector C-54 (terminal No. 45) <A/T>.
Q: Is the harness wire in good condition?

YES : Replace the ECM or PCM. Then go to Step 21.
NO : Repair it. Then go to Step 21.

AK300428

1

2

3

AB

B-20 (B)

CRANKSHAFT
POSITION
SENSOR

CONNECTOR: B-20

HARNESS CONNECTOR:
COMPONENT SIDE

AK300415

82

78

8180

89

90

91

92

79

87

71

74 73 72

76 75

77

85

88

83

84

86

CONNECTOR: C-60 <M/T>

AB

C-60 (G)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-422

STEP 11. Measure the power supply voltage at crankshaft
position sensor harness side connector B-20.
(1) Disconnect the connector B-20 and measure at the harness

side.

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

(3) Measure the voltage between terminal No. 3 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 13.
NO : Go to Step 12.

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

AK300428

1

2

3

AB

B-20 (B)

CRANKSHAFT
POSITION
SENSOR

CONNECTOR: B-20

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01417AG

2 1

3

B-20 HARNESS
CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-423

STEP 12. Check connector A-18X at MFI relay for damage.
Q: Is the connector in good condition?

YES : Repair harness wire between MFI relay connector

A-18X (terminal No. 4) and crankshaft position sensor
connector B-20 (terminal No. 3) because of open
circuit or short circuit to ground. Then go to Step 21.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 21.

STEP 13. Check the continuity at crankshaft position
sensor harness side connector B-20.
(1) Disconnect the connector B-20 and measure at the harness

side.

(2) Check for the continuity between terminal No. 1 and

ground.

• Should be less than 2 ohms.

Q: Is the continuity normal?

YES : Go to Step 16.
NO : Go to Step 14.

AK300454

2

1

3

4

CONNECTOR: A-18X

AB

A-18X

HARNESS CONNECTOR:
COMPONENT SIDE

AK300428

1

2

3

AB

B-20 (B)

CRANKSHAFT
POSITION
SENSOR

CONNECTOR: B-20

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01418 AG

2 1

3

B-20 HARNESS
CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-424

STEP 14. 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 15.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 21.

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

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