Mitsubishi L200. Manual — part 175

TROUBLESHOOTING

DIESEL FUEL

13A-496

• Damaged harness (Open circuit between 1st and

2nd rail switch and engine-ECU, and open circuit
between 1st and 2nd rail switch and J/B)

• Damaged connector (Engine-ECU connector, 1st

and 2nd rail switch connector)

• Failed engine-ECU

DIAGNOSIS PROCEDURE

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

• Refer to Data List Reference Table

P.13A-542

.

a. Item 72: 1st and 2nd rail switch

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Go to Step 2 .

STEP 2. Check 1st and 2nd rail switch itself

• Check 1st and 2nd rail switch itself (Refer to

GROUP 22B

− Transmission − Transmission

Inspection <2WD>, GROUP 22C

− Transmission

− Transmission Inspection <4WD>).

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Replace the 1st and 2nd rail switch.

STEP 3. Connector check: B-06 1st and 2nd rail
switch connector

Q: Is the check result normal?

YES :

Go to Step 4 .

NO :

Repair or replace.

STEP 4. Perform voltage measurement at B-06
1st and 2nd rail switch connector.

• Disconnect connector, and measure at harness

side.

• Ignition switch: ON

• Voltage between terminal No. 1 and earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 5 .

NO :

Check intermediate connector C-30, and
repair if necessary. If intermediate
connector is normal, check and repair
harness between B-06 (terminal No. 1) 1st
and 2nd rail switch connector and C-208
(terminal No. 2) J/B connector.

AK503584

1 2

Harness side
connector

B-06 (GR)

Connector: B-06

AB

AK503584

1 2

Harness side
connector

B-06 (GR)

Connector: B-06

AB

TROUBLESHOOTING

DIESEL FUEL

13A-497

STEP 5. Connector check: C-105 engine-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 6 .

NO :

Repair or replace.

STEP 6. Perform voltage measurement at C-105
engine-ECU connector.

• Disconnect connector, and measure at harness

side.

• Ignition switch: ON

• Voltage between terminal No. 11 and earth.

OK:

System voltage (Shift lever position: 1st)
0 V (Shift lever position: Neutral)

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Check intermediate connectors A-115 and
C-29, and repair if necessary. If intermediate
connectors are normal, check and repair
harness between C-105 (terminal No. 11)
engine-ECU connector and B-06 (terminal
No. 2) 1st and 2nd rail switch connector.

STEP 7. Check the trouble symptoms.

Q: Does trouble symptom persist?

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

TROUBLESHOOTING

DIESEL FUEL

13A-498

YES :

Replace the engine-ECU. When the engine-

ECU is replaced, write the chassis number
(Refer to GROUP 00

− Precautions Before

Service

− How to Perform Chassis Number

Writing ). After replacing the engine-ECU,
register the injector identification code and
learn fuel injection (Refer to GROUP 00

−

Precautions Before Service

− What The

Common Rail Engine Learns ). After
registering the injector identification code,
the vehicle equipped with the DPF carries
out the forcible DPF regeneration. (Refer to
GROUP 17

− Emission Control − Diesel

Particulate Filter (DPF) System

− Forcible

DPF Regeneration ).

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use Troubleshooting/

Inspection Service Points

− How to Cope

with Intermittent Malfunction ).

TROUBLESHOOTING

DIESEL FUEL

13A-499

Inspection Procedure 19: Back-up Lamp Switch System <M/T>

OPERATION

• A backup lamp switch detects that a transmission

is shifted into a reverse gear position.

• An engine-ECU controls an engine speed to be 3,

000 r/min or less so that an excessive load can-
not be applied to a drive train system due to a
sudden start in a reverse gear position.

PROBABLE CAUSES

• Failed back-up lamp switch

AKB00290

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

1 2

Ignition switch (IG1)

9

13

L-B

L-Y

L-Y

R-G

R-G

R-G

Back-up Lamp Switch Circuit

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

Engine-ECU

Back-up lamp switch

21

7.5A

2

J/B

C-208

C-207

4

C-30

10

2

C-29

1

A-28

9

OFF

ON

C-105

B-02

MU802601

AB