Mitsubishi Outlander (2003+). Manual - part 49

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-59

STEP 11. Connector check: B-17X engine control 
relay connector and B-134 engine-ECU 
connector.

Q: Is the check result normal?

YES : 

 Go to Step 12 .

NO : 

Repair.

STEP 12. Check harness between B-17X engine 
control relay connector and injector connector.

a. Check harness between B-17X (terminal No. 1) 

engine control relay connector and B-01 (terminal 
No. 1) No. 1 injector connector.

b. Check harness between B-17X (terminal No. 1) 

engine control relay connector and B-02 (terminal 
No. 1) No. 2 injector connector.

c. Check harness between B-17X (terminal No. 1) 

engine control relay connector and B-04 (terminal 
No. 1) No. 3 injector connector.

d. Check harness between B-17X (terminal No. 1) 

engine control relay connector and B-05 (terminal 
No. 1) No. 4 injector connector.

œ

Check power supply line for damage.

Q: Are the check results normal?

YES : 

 Go to Step 13 .

NO : 

Repair

AK300255

2

1

3

4

Relay box’s
triangle marks

AB

CONNECTOR: B-17X

B-17X

Harness side
connector

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

AK300255

2

1

3

4

Relay box’s
triangle marks

AB

CONNECTOR: B-17X

B-17X

Harness side
connector

AK300265

M

1

2

Harness side connector

Connector: B-01, B-02, B-04, B-05

B-02 (GR)

AB

B-01 (GR) B-02 (GR) B-04 (GR) B-05 (GR)

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-60

STEP 13. Check harness between injector 
connector and C-134 engine-ECU connector.

a. Check harness between B-01 (terminal No. 2) 

No. 1injector connector and C-134 (terminal No. 
1) engine-ECU connector.

b. Check harness between B-02 (terminal No. 2) 

No. 2 injector connector and C-134 (terminal No. 
14) engine-ECU connector.

c. Check harness between B-04 (terminal No. 2) 

No. 3 injector connector and C-134 (terminal No. 
2) engine-ECU connector.

d. Check harness between B-05 (terminal No. 2) 

No. 4 injector connector and C-134 (terminal No. 
15) engine-ECU connector.

Q: Are the check results normal?

YES : 

 Go to Step 14 .

NO : 

Repair

STEP 14. Measure fuel pressure.

œ

Measure fuel pressure (Refer to 

3

13A



).

Q: Is the check result normal?

YES : 

Repair.

NO : 

Replace engine-ECU

AK300265

M

1

2

Harness side connector

Connector: B-01, B-02, B-04, B-05

B-02 (GR)

AB

B-01 (GR) B-02 (GR) B-04 (GR) B-05 (GR)

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

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-61

Code No. P0130: Oxygen Sensor (Front) System <sensor 1>

OPERATION

œ

The sensor signal is inputted to the engine-ECU 
(terminal No. 76) from the oxygen sensor output 
terminal (terminal No. 4).

œ

The oxygen sensor (terminal No. 2) is earthed 
with engine-ECU (terminal No. 92).

FUNCTION

œ

The oxygen sensor converts the concentration of 
oxygen in the exhaust emission into a voltage 
and inputs the signal to the engine-ECU.

œ

When the air-fuel ratio is richer than the theoreti-
cal air-fuel ratio, the oxygen sensor outputs a volt-
age of about 1 V. When it is leaner than the 
theoretical air-fuel ratio, it outputs a voltage of 
about 0 V.

œ

In response to the signal, the engine-ECU con-
trols the fuel infection amount so that the air-fuel 
ratio can be equivalent to the theoretical air-fuel 
ratio.

TROUBLE JUDGMENT

Check Condition

œ

Above 3 minutes later after the engine has 
started up.

œ

The engine coolant temperature approximately 
82

•

C or more.

œ

The engine speed is 1,200 r/min or more.

œ

The volumetric efficiency 25% or more.

œ

The monitoring time is 5 seconds.

Judgment Criteria

œ

When the oxygen sensor (front) output voltage is 
0.2 V or less and a power voltage of 5 V is 
applied to the oxygen sensor (front) in the 
engine-ECU, the sensor output voltage is 4.5 V or 
more.

Check Condition

œ

The engine speed is 3,000 r/min or less.

œ

During the air-fuel ratio feedback control

AK300266

1

2

3

4

82

78

81

80

89 90 9192

79

87

71

74

73

72

76

75

77

85

88

83 84

86

AB

B-112

(MU802605)

Engine-ECU

Oxygen sensor (front)

From Engine control relay

To engine-ECU

1

2

3

4

92

B

W

B

B

76

Oxygen sensor (front) circuit

2

1

J/C (2) 
C-17

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

C-137

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-62

Judgment Criteria

œ

When the oxygen sensor (front) output frequency 
is 6 or less for 10 seconds on the average.

PROBABLE CAUSE

œ

Failed oxygen sensor

œ

Open/short circuit in oxygen sensor (front) circuit 
or loose connector contact

œ

Failed engine-ECU 

DIAGNOSIS PROCEDURE

STEP 1. MUT-II data list

œ

Refer to Data list reference table 

3

13A



.

a. Item 11: Oxygen sensor (front)

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

-

 How to Use 

Troubleshooting/Inspection Service Points 

3

00



).

NO : 

Go to Step 2 .

STEP 2. Connector check: B-112 oxygen sensor 
(front) connector

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Repair.

STEP 3. Measure voltage at B-112 oxygen sensor 
(front) connector.

œ

Disconnect connector, and measure at harness 
side.

œ

Resistance between terminal No. 2 and earth.

OK: 2 

W

 or less

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Go to Step 4 .

STEP 4. Connector check: C-137 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Repair.

AK300264

1

2

3

4

AB

B-112 (B)

Harness side connector

Oxygen sensor (front)

Connector: B-112

AK300264

1

2

3

4

AB

B-112 (B)

Harness side connector

Oxygen sensor (front)

Connector: B-112

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