Mitsubishi Lancer Evolution IX. Manual - part 434

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-211

STEP 5. Connector check: C-117 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check intermediate connector B-27, and 

repair if necessary. If intermediate 
connector is normal, check and repair 
harness between B-30 (terminal No. 1) 
transmission oil temperature sensor 
connector and C-117 (terminal No. 96) 
engine-ECU connector.

• Check output line for open circuit.

NO : 

Repair or replace the connector.

STEP 6. Connector check: C-117 engine-ECU 
connector

Q: Is the check result normal? 

YES : 

Go to Step 7 .

NO : 

Repair or replace the connector.

AK501996

80

87

81

94

85

82

84

93

86

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>

AK502000

1

2

AB

Connector: B-30

B-30 (B)

Harness side 
connector

AK501996

80

87

81

94

85

82

84

93

86

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>

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-212

STEP 7. Check harness between B-30 (terminal 
No. 1) transmission oil temperature sensor 
connector and C-117 (terminal No. 96) 
engine-ECU connector.

NOTE: Before checking harness, checking interme-
diate connector B-27, and repair if necessary.

• Check output line for short circuit.

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair the damaged harness wire.

STEP 8. Check the trouble symptoms.

Q: Does trouble symptom persist? 

YES : 

Replace the engine-ECU.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

P.00-5

).

STEP 9. Perform resistance measurement at B-30 
transmission oil temperature sensor connector.

• Disconnect connector and measure at harness 

side.

• Resistance between terminal No. 2 and earth.

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Go to Step 10 .

AK502000

1

2

AB

Connector: B-30

B-30 (B)

Harness side 
connector

AK501996

80

87

81

94

85

82

84

93

86

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>

AK502000

1

2

AB

Connector: B-30

B-30 (B)

Harness side 
connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-213

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.

STEP 11. Check harness between B-30 (terminal 
No. 2) transmission oil temperature sensor 
connector and C-119 (terminal No. 49) 
engine-ECU connector.

NOTE: Before checking harness, checking interme-
diate connector B-27, and repair if necessary.

• Check earthing line for open circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair the damaged harness wire.

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>

AK502000

1

2

AB

Connector: B-30

B-30 (B)

Harness side 
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>

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-214

STEP 12. Perform voltage measurement at B-30 
transmission oil temperature sensor connector.

• Use special tool test harness (MB991658) to con-

nect connector, and measure at pick-up harness.

• Ignition switch: "ON"

• Voltage between terminal No. 1 and earth.

OK:

Transmission oil temperature at 

−20°C: 3.9 − 

4.5 V

Transmission oil temperature at 0

°C: 3.2 − 3.8 

V

Transmission oil temperature at 20

°C: 2.3 − 2.9 

V

Transmission oil temperature at 40

°C: 1.3 − 1.9 

V

Transmission oil temperature at 60

°C: 0.7 − 1.3 

V

Transmission oil temperature at 80

°C: 0.3 − 0.9 

V

Q: Is the check result normal?

YES : 

Go to Step 14 .

NO : 

Go to Step 13 .

STEP 13. Connector check: C-117 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check intermediate connector B-27, and 

repair if necessary. If intermediate 
connector is normal, check harness 
between B-30 (terminal No. 1) transmission 
oil temperature sensor connector and C-117 
(terminal No. 96) engine-ECU connector.

• Check output line for damage.

NO : 

Repair or replace the connector.

AK502000

1

2

AB

Connector: B-30

B-30 (B)

Harness side 
connector

AK501996

80

87

81

94

85

82

84

93

86

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>

AK502000

1

2

AB

Connector: B-30

B-30 (B)

Harness side 
connector