Mitsubishi Outlander (2003+). Manual - part 93

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-235

STEP 5. Measure voltage at C-134 engine-ECU 
connector.

œ

Measure engine-ECU terminal voltage.

œ

Ignition switch: ON

œ

Voltage between terminal No. 12 and earth, also 
between terminal No. 25 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Check and repair C-134 engine-ECU 

connector.

NO : 

Go to Step 6 .

STEP 6. Connector check: C-137 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Repair.

STEP 7. Measure voltage at C-137 engine-ECU 
connector.

œ

Measure engine-ECU terminal voltage.

œ

Ignition switch: ON 

œ

Voltage between terminal No. 82 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Go to Step 8 .

STEP 8. Connector check: C-137 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair.

AK300257

1

14

4

19

5

22

6

17

8

15

9

18

7

20

16

2

13 12

23

24

25

26

21

3

10

11

AB

CONNECTOR: C-134

C-134

Harness side connector

AK300254

82

78

8180

89

90

91

92

79

87

71

74 73 72

76 75

77

85

88

83

84

86

AB

CONNECTOR: C-137

C-137

Harness side connector

AK300254

82

78

8180

89

90

91

92

79

87

71

74 73 72

76 75

77

85

88

83

84

86

AB

CONNECTOR: C-137

C-137

Harness side connector

AK300254

82

78

8180

89

90

91

92

79

87

71

74 73 72

76 75

77

85

88

83

84

86

AB

CONNECTOR: C-137

C-137

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-236

STEP 9. Check ignition switch.

œ

Check ignition switch (Refer to GROUP 54A 

-

 

Ignition Switch 

-

 Ignition Switch 

3

54A



).

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Replace ignition switch.

STEP 10. Connector check: C-303 ignition switch 
connector

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Repair.

STEP 11. Check harness between C-303 (terminal 
No. 2) ignition switch connector and C-137 
(terminal No. 82) engine-ECU connector.

NOTE: Before checking harness, check intermediate 
connectors C-106, C-202 and C-203, and repair if 
necessary.

œ

Check output line for open/short circuit.

Q: Is the check result normal?

YES : 

Check and repair ignition switch IG1 power 

supply line harness and connector.

œ

Check power supply line for short 
circuit.

NO : 

Repair.

1

2

3

4

5

6

AK300304

CONNECTOR: C-303

C-303

Harness side
connector

AB

1

2

3

4

5

6

AK300304

CONNECTOR: C-303

C-303

Harness side
connector

AB

AK300254

82

78

8180

89

90

91

92

79

87

71

74 73 72

76 75

77

85

88

83

84

86

AB

CONNECTOR: C-137

C-137

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-237

STEP 12. Measure voltage at C-135 engine-ECU 
connector.

œ

Measure engine-ECU terminal voltage.

œ

Ignition switch: OFF

œ

Voltage between terminal No. 38 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 13 .

NO : 

Check and repair harness between B-17X 

(terminal No. 2) engine control relay 
connector and C-135 (terminal No. 38) 
engine-ECU connector.

œ

Check earthing line for open/short 
circuit.

STEP 13. Measure voltage at C-135 engine-ECU 
connector.

œ

Measure engine-ECU terminal voltage.

œ

Ignition switch: ON

œ

Voltage between terminal No. 38 and earth.

OK: 1 V or less

Q: Is the check result normal?

YES : 

Go to Step 17 .

NO : 

Go to Step 14 .

AK300256

34 33 32

36 35

37

42

45

31

39

38

46

40

41

43

44

AB

CONNECTOR: C-135

C-135

Harness side connector

AK300255

2

1

3

4

Relay box’s
triangle marks

AB

CONNECTOR: B-17X

B-17X

Harness side
connector

AK300256

34 33 32

36 35

37

42

45

31

39

38

46

40

41

43

44

AB

CONNECTOR: C-135

C-135

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-238

STEP 14. Connector check: C-135 engine-ECU 
connector, C-303 ignition switch connector

Q: Is the check result normal?

YES : 

Go to Step 15 .

NO : 

Repair.

STEP 15. Check harness between C-303 (terminal 
No. 2) ignition switch connector and C-137 
(terminal No. 82) engine-ECU connector.

NOTE: Before checking harness, check intermediate 
connectors C-106, C-202 and C-203 and repair if 
necessary.

œ

Check output line for open/short circuit.

Q: Is the check result normal?

YES : 

Go to Step 16 .

NO : 

Repair.

STEP 16. Check the trouble symptoms.

Q: Does trouble symptom persist?

YES : 

Replace engine-ECU.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

-

 How to Use 

Troubleshooting/Inspection Service Points 

3

00



).

AK300256

34 33 32

36 35

37

42

45

31

39

38

46

40

41

43

44

AB

CONNECTOR: C-135

C-135

Harness side connector

1

2

3

4

5

6

AK300304

CONNECTOR: C-303

C-303

Harness side
connector

AB

1

2

3

4

5

6

AK300304

CONNECTOR: C-303

C-303

Harness side
connector

AB

AK300254

82

78

8180

89

90

91

92

79

87

71

74 73 72

76 75

77

85

88

83

84

86

AB

CONNECTOR: C-137

C-137

Harness side connector