Mitsubishi Eclipse. Manual - part 507

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-571

AK300462

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

CONNECTOR: C-55 <A/T>

C-55 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300748

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

CONNECTOR: C-58 <M/T>

AB

C-58 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-572

STEP 11. Check 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.

AK300448

1

2

3

CRANKSHAFT
POSITION
SENSOR

CONNECTOR: B-20 <WITHOUT INTAKE 
MANIFOLD TUNING  SYSTEM>

AB

B-20 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AK300449

1

2

3

CONNECTOR: B-20 <WITH INTAKE 
MANIFOLD TUNING  SYSTEM>

AB

B-20 (B)

CRANKSHAFT
POSITION
SENSOR

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-573

(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.

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.

AKX01417AG

2 1

3

B-20 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK300454

2

1

3

4

CONNECTOR: A-18X

AB

A-18X

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-574

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.

AK300448

1

2

3

CRANKSHAFT
POSITION
SENSOR

CONNECTOR: B-20 <WITHOUT INTAKE 
MANIFOLD TUNING  SYSTEM>

AB

B-20 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AK300449

1

2

3

CONNECTOR: B-20 <WITH INTAKE 
MANIFOLD TUNING  SYSTEM>

AB

B-20 (B)

CRANKSHAFT
POSITION
SENSOR

HARNESS CONNECTOR:
COMPONENT SIDE