Mitsubishi Outlander (2003+). Manual - part 76

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-167

DIAGNOSIS PROCEDURE

STEP 1. Connector check: B-19 intermediate 
connector

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Repair.

STEP 2. Measure voltage at B-19 intermediate 
connector.

œ

Disconnect connector, and measure at male con-
nector side.

œ

Ignition switch: ON

œ

Voltage between terminal No. 1 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Go to Step 3 .

STEP 3. Connector check: C-135 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Repair.

STEP 4. Check harness between B-19 (terminal 
No. 1) intermediate connector and C-135 
(terminal No. 41) engine-ECU connector.

œ

Check output line for short circuit.

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Repair.

AK300294

1

2

3

4

5

6

AB

CONNECTOR: B-19

B-19 (B)

Female side
connector

AK300295

1 2 3

4 5 6

AB

CONNECTOR: B-19

B-19 (B)

Male side
connector

AK300294

1

2

3

4

5

6

AB

CONNECTOR: B-19

B-19 (B)

Female side
connector

AK300295

1 2 3

4 5 6

AB

CONNECTOR: B-19

B-19 (B)

Male 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-168

STEP 5. 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



).

STEP 6. Measure voltage at B-19 intermediate 
connector.

œ

Use special tool test harness (MB991658) to con-
nect connector, and measure at pick-up harness.

œ

Ignition switch: ON

œ

Voltage between terminal No. 1 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Go to Step 7 .

STEP 7. Connector check: B-30 alternator 
connector

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair.

STEP 8. Check harness between B-30 (terminal 
No. 4) alternator connector and B-19 (terminal 
No. 1) intermediate connector.

œ

Check output line for short circuit.

Q: Is the check result normal?

YES : 

Replace alternator.

NO : 

Repair.

AK300294

1

2

3

4

5

6

AB

CONNECTOR: B-19

B-19 (B)

Female side
connector

AK300296

2

1

3

4

AB

Harness side
connector

CONNECTOR: B-30

B-30 (GR)

AK300296

2

1

3

4

AB

Harness side
connector

CONNECTOR: B-30

B-30 (GR)

AK300294

1

2

3

4

5

6

AB

CONNECTOR: B-19

B-19 (B)

Female side
connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-169

STEP 9. Measure voltage at B-19 intermediate 
connector.

œ

Use special tool test harness (MB991658) to con-
nect connector, and measure at pick-up harness.

œ

Engine: Idle after warm-up

œ

Transmission: Neutral

œ

Radiator fan: Inactive

œ

Voltage between terminal No. 1 and earth.

OK: Switching the headlamps to ON from 
OFF causes the voltage to fall.

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Go to Step 10 .

STEP 10. Connector check: B-30 alternator 
connector 

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Repair.

STEP 11. Check harness between B-30 (terminal 
No. 4) alternator connector and B-19 (terminal 
No. 1) intermediate connector pin No. 1.

œ

Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Repair.

AK300294

1

2

3

4

5

6

AB

CONNECTOR: B-19

B-19 (B)

Female side
connector

AK300296

2

1

3

4

AB

Harness side
connector

CONNECTOR: B-30

B-30 (GR)

AK300296

2

1

3

4

AB

Harness side
connector

CONNECTOR: B-30

B-30 (GR)

AK300294

1

2

3

4

5

6

AB

CONNECTOR: B-19

B-19 (B)

Female side
connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-170

STEP 12. Check harness between B-19 (terminal 
No. 1) intermediate connector and C-135 
(terminal No. 41) engine-ECU connector.

œ

Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 13 .

NO : 

Repair.

STEP 13. Check trouble symptom.

Q: Same symptoms regenerated?

YES : 

Replace alternator.

NO : 

Intermittent malfunction (Refer to Group 00 

-

 How to Use troubleshooting/Inspection 

Service Points 

3

00



).

AK300295

1 2 3

4 5 6

AB

CONNECTOR: B-19

B-19 (B)

Male 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