Mitsubishi Outlander (2003+). Manual - part 40

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-23

STEP 25. Check harness between B-08 (terminal 
No. 3) air flow sensor connector and C-137 
(terminal No. 90) engine-ECU connector.

œ

Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 26 .

NO : 

Repair.

STEP 26.Connector check: C-135 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check intermediate connector C-16, and 

repair if necessary. If intermediate 
connector is normal, check and repair 
harness between B-08 (terminal No. 5) air 
flow sensor connector and C-135 (terminal 
No. 40) engine-ECU connector.

œ

Check earthing line for damage.

No : 

Repair.

AK300253

3

4

5

1

2

6

7

AB

Harness side connector

B-08 (B)

Connector: B-08

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

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

AK300253

3

4

5

1

2

6

7

AB

Harness side connector

B-08 (B)

Connector: B-08

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-24

Code No. P0105: Barometric Pressure Sensor System

OPERATION

œ

A power voltage of 5 V is applied to the baromet-
ric pressure sensor power terminal (terminal No. 
1) of the air flow sensor connector from the 
engine-ECU (terminal No. 81) and earthed to the 
engine-ECU (terminal No. 40) from the air flow 
sensor (terminal No. 5).

œ

The sensor signal is inputted to the engine-ECU 
(terminal No. 85) from the barometric pressure 
sensor output terminal (terminal No. 2) of the air 
flow sensor connector.

FUNCTION

œ

The barometric pressure sensor converts the bar-
ometric pressure into a voltage signal and inputs 
the signal to the engine-ECU.

œ

In response to the signal, the engine-ECU cor-
rects the fuel injection amount, etc.

TROUBLE JUDGMENT

Check Condition

œ

2 seconds later after the ignition switch has been 
in "ON" position or the engine has started up.

œ

The battery voltage is 8 V or more.

Judgment Criterion

œ

The sensor output voltage is 4.5 V or more (Baro-
metric pressure of above 114 kPa or equivalent) 
for 2 seconds.

Or 

œ

The sensor output voltage is 0.2 V or less (Baro-
metric pressure of below 53kpa or equivalent) for 
2 seconds.

AK300258

7

4 5 6

1 2 3

34

33

32

36

35

37

42

45

31

39

38

46

40 41

43 44

82

78

81

80

89 90 9192

79

87

71

74

73

72

76

75

77

85

88

83 84

86

5 V

Engine-ECU

81

Y-B

G-W

B-W

B-W

85

40

B-08

Barometric pressure sensor 
(Incorporated in air flow sensor)

1

2

5

Barometric pressure sensor circuit 

20

17

J/C (1)
C-16

AB

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

C-135

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-25

PROBABLE CAUSE

œ

Failed barometric pressure sensor

œ

Open/short circuit in barometric pressure sensor 
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 25: Barometric pressure sensor

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-08 air flow sensor 
connector

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Repair.

STEP 3. Measure voltage at B-08 air flow sensor 
connector.

œ

Disconnect connector, and measure at harness 
side.

œ

Ignition switch: ON

œ

Voltage between terminal No. 1 and earth.

OK: 4.9 

-

 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Go to Step 4 .

STEP 4. Measure voltage at C-137 engine-ECU 
connector.

œ

Measure engine-ECU terminal voltage.

œ

Ignition switch: ON

œ

Voltage between terminal No. 81 and earth.

OK: 4.9 

-

 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Go to Step 6 .

AK300253

3

4

5

1

2

6

7

AB

Harness side connector

B-08 (B)

Connector: B-08

AK300253

3

4

5

1

2

6

7

AB

Harness side connector

B-08 (B)

Connector: B-08

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-26

STEP 5. Connector check: C-137 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check and repair harness between B-08 

(terminal No. 1) air flow sensor connector 
and C-137 (terminal No. 81) engine-ECU 
connector.

œ

Check power supply line for open 
circuit.

NO : 

Repair.

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

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Repair.

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

AK300253

3

4

5

1

2

6

7

AB

Harness side connector

B-08 (B)

Connector: B-08

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