Mitsubishi Eclipse. Manual - part 312

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-741

.

CIRCUIT OPERATION

• A diagnostic output is made from the ECM (termi-

nal No. 62) <M/T> or PCM (terminal No. 85) 
<A/T> to the diagnostic output terminal (terminal 
No. 7) of the data link connector.

.

COMMENT

• No power supply to ECM <M/T> or PCM <A/T>.

• Defective ground circuit of ECM <M/T> or PCM 

<A/T>.

• Defective ECM <M/T> or PCM <A/T>.

• Improper communication line between ECM 

<M/T> or PCM <A/T> and scan tool.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this case: ) 

• Malfunction of ECM <M/T> or PCM <A/T> power 

supply circuit. 

• Malfunction of the ECM <M/T> or PCM <A/T>. 

• Open circuit between ECM <M/T> or PCM <A/T> 

and data link connector. 

AK300060

PCM

CONNECTOR: C-57 <A/T>

AG

C-57 (GR)

AK300119

CONNECTOR: C-28

AB

C-28

AK300070

CONNECTOR: C-77

AB

C-77

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-742

DIAGNOSIS

STEP 1. Check connector C-56 at ECM <M/T> or connector 
C-57 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES :  Go to Step 2.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

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

AK300735

98

78

71

88

89

76

77

72
79
91

73
80

74

75

81
92

82

83

93

84

85

94

86

87

95

96

90

97

CONNECTOR: C-57 <A/T>

C-57 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-743

STEP 2. Check for open circuit, short circuit to ground and 
harness damage between data link connector C-29 
(terminal No. 7) and ECM connector C-56 (terminal No. 62) 
<M/T> or PCM connector C-57 (terminal No. 85) <A/T>.

AK300450

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

CONNECTOR: C-29

AB

C-29 (B)

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

AK300735

98

78

71

88

89

76

77

72
79
91

73
80

74

75

81
92

82

83

93

84

85

94

86

87

95

96

90

97

CONNECTOR: C-57 <A/T>

C-57 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-744

NOTE: Check harness after checking intermediate connectors 
C-28 and C-77. If intermediate connectors are damaged, repair 
or replace them. Refer to GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. Then check that the malfunction is elimi-

nated.
Q: Is the harness wire in good condition?

YES :  Refer to, INSPECTION PROCEDURE 29 

− Power 

Supply System and Ignition Switch 

− IG System 

P.13A-837

.

NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.