Mitsubishi Lancer Evolution IX. Manual - part 458

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-307

STEP 9. Perform voltage measurement at C-119 
engine-ECU connector.

• Disconnect connector, and measure at harness 

side.

• Voltage between terminal No. 60 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

• Check intermediate connector A-13

*1

 or 

C-31

*2

 and repair if necessary. If 

intermediate connector is normal, check 
and repair harness between C-119 
(terminal No. 60) engine-ECU connector 
and battery. 

• Check power supply line for short 

circuit.

STEP 10. Connector check: C-119 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Repair or replace the connector.

AK501994

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

AB

Connector: C-119

C-119 (GR)

C-119 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

AK501994

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

AB

Connector: C-119

C-119 (GR)

C-119 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-308

STEP 11. Perform resistance measurement at 
C-119 engine-ECU connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal No. 46 and earth, 

and No. 58 and earth.

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Check and repair harness between C-119 

(terminal No. 46 and No. 58) engine-ECU 
connector and body earth.

• Check earthing line for open circuit 

and damage. 

STEP 12. Connector check: C-119 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 13 .

NO : 

Repair or replace the connector.

AK501994

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

AB

Connector: C-119

C-119 (GR)

C-119 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

AK501994

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

AB

Connector: C-119

C-119 (GR)

C-119 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-309

STEP 13. Perform voltage measurement at C-119 
engine-ECU connector.

• Disconnect connector, and measure at harness 

side.

• Voltage between terminal No. 57 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 14 .

NO : 

Check and repair harness between B-12X 

(terminal No. 3) engine control relay 
connector and C-119 (terminal No. 57) 
engine-ECU connector.

• Check earthing line for open/short 

circuit.

STEP 14. Perform voltage measurement at C-119 
engine-ECU connector.

• Disconnect connector, and measure at harness 

side.

• Using jumper wire, connect C-119 (terminal No. 

57) engine-ECU connector and earth.

• Voltage between terminal No. 47 and earth, and 

No. 59 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 15 .

NO : 

Check intermediate connector C-105 and 

repair if necessary. If intermediate 

connector is normal, check and repair 

harness between C-119 (terminal No. 47 

and No. 59) engine-ECU connector and 

B-12X (terminal No. 4) engine control relay 

connector.

AK501994

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

AB

Connector: C-119

C-119 (GR)

C-119 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

AK305003

2

1

3

4

AB

Connector : B-12X

B-12X

Harness side 
connector

Relay box’s
triangle marks

AK501994

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

AB

Connector: C-119

C-119 (GR)

C-119 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

AK305003

2

1

3

4

AB

Connector : B-12X

B-12X

Harness side 
connector

Relay box’s
triangle marks

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-310

STEP 15. Check harness between C-208 (terminal 
No. 2) ignition switch connector and C-117 
(terminal No. 99) engine-ECU connector.

NOTE: Before checking harness, check intermediate 
connectors C-123, C-210 and C-211, and repair if 
necessary.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 16 .

NO : 

Repair the damaged harness wire.

AK305251

1

2

3

4

5

6

Harness side connector

Connector: C-208

C-208

<L. H. drive vehicles>

<R. H. drive vehicles>

C-208

AB

AK501996

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87

81

94

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84

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98

99

74

92

73

83

88

91

95

97 96

100

89

78

71

90

76

77

75

72
79

AB

Connector: C-117

C-117 (GR)

C-117 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>