Mitsubishi Eclipse. Manual — part 197

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-281

STEP 2. Measure the sensor output voltage at heated
oxygen sensor (rear) connector C-23 by backprobing.
(1) Do not disconnect the connector C-23.
(2) Start the engine and run at idle.

(3) Measure the voltage between terminal No. 3 and ground by

backprobing.

• Warming up the engine. When the engine is revved, the

output voltage should repeat 0 volt and 0.6 to 1.0 volt
alternately.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?

YES : Go to Step 3.
NO : Go to Step 7.

AK300405

2

1

6 5 4 3

AB

C-23

HEATED OXYGEN
SENSOR (REAR)

CONNECTOR: C-23

HARNESS
CONNECTOR:
HARNESS SIDE

AK000291

1

2

3 4 5 6

C-23 HARNESS
CONNECTOR:
HARNESS SIDE

AK000291AG

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-282

STEP 3. Measure the sensor output voltage at ECM
connector C-60 <M/T> or PCM connector C-57 <A/T> by
backprobing.
(1) Do not disconnect the connector C-60 <M/T> or C-57

<A/T>.

(2) Start the engine and run at idle.

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

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-283

(3) Measure the voltage between terminal No. 75 <M/T> or No.

73 <A/T> and ground by backprobing.

• Warming up the engine. When the engine is 2,500 r/min,

the output voltage should repeat 0 volt and 0.6 to 1.0
volt alternately.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?

YES : Go to Step 4.
NO : Go to Step 6.

STEP 4. Check connector C-23 at heated oxygen sensor
(rear) and connector C-60 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 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 14.

AK000292

7172 73 74 75 76 77 78 79 80 81

82 83 84 85 86 87 88 89 90

92

91

AI

<M/T>

C-60 HARNESS
CONNECTOR:
HARNESS SIDE

AK000293

71 72 73 74

75 76 77

78 79 80 81 82 83 84

86 87 88 89

90 91

92 93 94

95 96

97 98

85

C-57 HARNESS
CONNECTOR:
HARNESS SIDE

AK

<A/T>

AK300405

2

1

6 5 4 3

AB

C-23

HEATED OXYGEN
SENSOR (REAR)

CONNECTOR: C-23

HARNESS
CONNECTOR:
HARNESS SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-284

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

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