Mitsubishi L200. Manual — part 89

TROUBLESHOOTING

DIESEL FUEL

13A-152

STEP 15. Perform voltage measurement at C-105
engine-ECU connector.

• Measure engine-ECU terminal voltage.

• Engine: Idle (after warning up)

• Voltage between terminal No. 64 and earth.

OK: 1.15

− 1.75 V

Q: Is the check result normal?

YES :

Go to Step 17 .

NO :

Go to Step 16 .

STEP 16. Connector check: C-105 engine-ECU
connector

Q: Is the check result normal?

YES :

Check intermediate connector A-131, and

repair if necessary. If intermediate
connector is normal, check and repair check
harness between A-44 (terminal No. 2) rail
pressure sensor connector and C-105
(terminal No. 64) engine-ECU connector.

• Check output line for open circuit and

damage.

NO :

Repair or replace the connector.

AKA00089

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

43

44

45

46

47

48

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

AKA00089

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

43

44

45

46

47

48

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

AK501327

1

2

3

AB

A-44 (B)

Harness side
connector

Connector: A-44

TROUBLESHOOTING

DIESEL FUEL

13A-153

STEP 17. Connector check: C-105 engine-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Repair or replace the connector.

AKA00089

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

43

44

45

46

47

48

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

TROUBLESHOOTING

DIESEL FUEL

13A-154

Code No. P0193: Rail Pressure Sensor Circuit High Input

OPERATION

• A power voltage of 5 V is applied to the rail pres-

sure sensor power terminal (terminal No. 1) from
the engine-ECU (terminal No. 70) and earthed to
the engine-ECU (terminal No. 88) from the rail
pressure sensor (terminal No. 3).

• The sensor signal is inputted to the engine-ECU

(terminal No. 64) from the rail pressure sensor
output terminal (terminal No. 2).

FUNCTION

• The rail pressure sensor converts the rail pres-

sure into a voltage signal and inputs the signal to
the engine-ECU.

• In response to the signal, the engine-ECU cor-

rects the fuel injection quantity.

TROUBLE JUDGMENT

Check Conditions

• Battery positive voltage is 8 − 16 V

• 2 seconds later after the ignition switch has been

in "ON" position or the engine has started up.

Judgment Criterion

• The rail pressure sensor output voltage is 4.85 V

or more for 0.5 second.

PROBABLE CAUSES

• Failed rail pressure sensor

• Open circuit in rail pressure sensor circuit or

loose connector contact

• Failed engine-ECU

AKA00196

1

2

3

1

2

3

4

5 6 7 8 9

10 1112 13 14 15 16 17 18 19 20 21 22 23 24

25 26

27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72

43 44 45 46 47 48

73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96

Engine-ECU

W

R

B

W

R

B

B

A-44

(MU802408)

Rail pressure
sensor

2

1

3

5

6

4

A-131

64

70

88

Rail Pressure Sensor Circuit

AD

Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Grey
R: Red P: Pink V:Violet PU: Purple SI: Silver

C-105

5 V

TROUBLESHOOTING

DIESEL FUEL

13A-155

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

• Refer to Data List Reference Table

P.13A-542

.

a. Item 63: Rail pressure sensor

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use Troubleshooting/

Inspection Service Points

− How to Cope

with Intermittent Malfunctions ).

NO :

Go to Step 2 .

STEP 2. Connector check: A-44 rail pressure
sensor connector

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair or replace the connector.

STEP 3. Perform resistance measurement at A-44
rail pressure sensor connector.

• Disconnect connector, and measure at harness

side.

• Resistance between terminal No. 3 and earth.

OK: Continuity (2

Ω or less)

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Go to Step 4 .

STEP 4. Connector check: C-105 engine-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 5 .

NO :

Repair or replace the connector.

AK501327

1

2

3

AB

A-44 (B)

Harness side
connector

Connector: A-44

AK501327

1

2

3

AB

A-44 (B)

Harness side
connector

Connector: A-44

AKA00089

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

43

44

45

46

47

48

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB