Mitsubishi Eclipse. Manual - part 408

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-175

STEP 10. Check connector C-58, C-62 at ECM <M/T> or 
connector C-55, C-59 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Go to Step 11.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 14.

AK300440

2

3

4

5

6

7

8

9

11

12

13

14

15

16

17

18

19

20

30

21

22

23

24

25

26

27

28

29

31

32

33

34

35

1

10

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

CONNECTORS: C-51, C-58 <M/T>

C-51 (GR)

C-58 (GR)

AB

C-58 HARNESS CONNECTOR:
COMPONENT SIDE

C-51 HARNESS CONNECTOR:
COMPONENT SIDE

AK300441

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

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

CONNECTORS: C-58, C-62 <M/T>

C-58 (GR)

C-62 (GR)

AB

C-62 HARNESS CONNECTOR:
COMPONENT SIDE

C-58 HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-176

STEP 11. Check for harness damage between throttle 
position sensor connector B-07 (terminal No. 3) and ECM 
connector C-62 (terminal No. 78) <M/T> or PCM connector 
C-59 (terminal No. 78) <A/T>.
Q: Is the harness wire in good condition?

YES : Go to Step 12.
NO :  Repair it. Then go to Step 14.

STEP 12. Check the maladjusted throttle position sensor.
Refer to, Throttle Position Sensor Adjustment 

P.13B-1103

.

Q: Is the output voltage normal?

YES : Go to Step 13.
NO :  Adjust it. Then go to Step 14.

AK300434

2 1

3

4

CONNECTOR: B-07

AB

B-07 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AK300460

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-59 <A/T>

C-59 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300445

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

CONNECTOR: C-62 <M/T>

C-62 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-177

STEP 13. Using scan tool MB991958, check data list item 
14: Throttle Position Sensor.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item 

14, Throttle Position Sensor.

• With the throttle valve in the idle position, voltage should 

be between 0.535 and 0.735 volt.

• With the throttle valve in the full-open position, voltage 

should be between 4.5 and 5.5 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use Troubleshooting/ 
Inspection Service Points 

P.00-6

.

NO :  Replace the ECM or PCM. Then go to Step 14.

STEP 14. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Procedure 6 − 

Other Monitor 

P.13B-7

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0121 set?

YES : Retry the troubleshooting.
NO :  The inspection is complete.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-178

DTC P0122: Throttle Position Sensor Circuit Low Input

AK000689

2 3 4

1

GREEN-

YELL

O

W

YELL

O

W

Y

ELL

OW

BL

ACK

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

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

97

49
<M/T>*1
57
<A/T>*3

78
<M/T>*2
78
<A/T>*4

42
<M/T>*1
46
<A/T>*3

5V

AUTO-CRUISE
CONTROL SYSTEM

      B-07
(MU802724)

THROTTLE POSITION
SENSOR

4

3

1

ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>

C-62 <M/T>
(MU803783)

C-59 <A/T>
(MU803782)

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

C-58 <M/T>
(MU803782)

C-55 <A/T>
(MU803781)

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

NOTE
*1:ECM connector C-58 <M/T>
*2:ECM connector C-62 <M/T>
*3:PCM connector C-55 <A/T>
*4:PCM connector C-59 <A/T>

Throttle Position Sensor (TPS) Circuit

AK300080

CONNECTOR: B-07

THROTTLE
POSITION
SENSOR

AB

B-07 (B)

AK300244

CONNECTORS: C-55, C-59 <A/T>

AD

PCM

C-55 (GR)

C-59 (GR)