Mitsubishi Outlander (2003+). Manual - part 58

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-95

STEP 7. Check harness between B-17X (terminal 
No. 1) engine control relay connector and B-02 
(terminal No. 1) No. 2 injector connector.

œ

Check power supply line for damage.

Q: Is the check result normal? 

YES : 

Go to Step 8 .

NO : 

Repair.

STEP 8. Connector check: C-134 engine-ECU 
connector

Q: Is the check result normal? 

YES : 

Go to Step 9 .

NO : 

Repair.

STEP 9. Check harness between B-02 (terminal 
No. 2) No. 2 injector connector and C-134 
(terminal No. 14) engine-ECU connector.

œ

Check output line for open/short circuit and dam-
age.

Q: Is the check result normal? 

YES : 

Go to Step 10 .

NO : 

Repair.

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-02

B-02 (GR)

AD

B-02 (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

AK300265

M

1

2

Harness side connector

Connector: B-02

B-02 (GR)

AD

B-02 (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-96

STEP 10. Measure signal waveform at C-134 
engine-ECU connector (Use oscilloscope).

œ

Engine: Idling

œ

Transmission: Neutral

œ

Voltage between terminal No. 9 and earth.

OK: Waveform should be display on Inspec-
tion procedure using an oscilloscope (Refer 
to 

3

13A



).

Q: Is the check result normal? 

YES : 

Intermittent malfunction (Refer to GROUP 

00 

-

 How to Use 

Troubleshooting/Inspection Service Points 

3

00



).

NO : 

Replace engine-ECU.

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-97

Code No. P0203: No. 3 Injector System

AK300272

2

1

2

1

2

1

2

1

1

2

3

4

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

B-17X

Engine control relay

Injector 
No. 1

Injector 
No. 2

Injector 
No. 3

Injector 
No. 4

B-01

B-02

B-04

B-05

1

1

1

1

1

2

Y

Y-R

Y-G

L

2

2

2

2

Engine-ECU

1

14

2

15

Injector circuit

Battery

4

W-B

W-B

R

R

R

R

R

3

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-134

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-98

OPERATION

œ

Power is supplied to the injector (terminal No. 1) 
from the engine control relay (terminal No. 1).

œ

The engine-ECU (terminal No. 2) makes the 
power transistor in the unit be in "ON" position, 
and that makes currents go on the injector (termi-
nal No. 2).

FUNCTION

œ

The engine-ECU controls the power supply inter-
val of the injector.

œ

The fuel injection amount of the injector depends 
on the power supply interval.

TROUBLE JUDGMENT

Check Conditions

œ

The engine speed is 50 

-

 1,000 r/mim.

œ

The throttle position sensor output voltage is 1.15 
V or less.

œ

Injector not in forced drive (actuator test) mode

Judgment Criteria

œ

No surge voltage of the injector coil is detected 
for 2 seconds.

PROBABLE CAUSE

œ

Failed No. 3 injector

œ

Open/short circuit in No. 3 injector circuit or loose 
connector contact

œ

Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. MUT-II actuator test

œ

Refer to Actuator test reference table list 

3

13A





.

a. Item 03: No. 3 injector

OK: Idling state varies.

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-04 No. 3 injector 
connector

Q: Is the check result normal? 

YES : 

Go to Step 3 .

NO : 

Repair.

STEP 3. Measure resistance at B-04 No. 3 injector 
connector.

œ

Disconnect connector, and measure at injector 
side.

œ

Resistance between terminal No. 1 and No. 2.

OK: 10.5 

-

 13.5 

W

Q: Is the check result normal? 

YES : 

Go to Step 4 .

NO : 

Replace No. 3 injector.

AK300265

M

1

2

Harness side connector

Connector: B-04

AE

B-04 (GR)

AK300265

M

1

2

Harness side connector

Connector: B-04

AE

B-04 (GR)