Mitsubishi Outlander (2003+). Manual - part 79

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-179

SYMPTOM PROCEDURES

Inspection Procedure 1: Communication with All System is not Possible

OPERATION

œ

Battery voltage is applied to diagnosis connector 
(terminal No.16).

œ

Diagnosis connector (terminals No. 4 and 5) are 
earthed to the vehicle body.

COMMENT ON TROUBLE SYMPTOM

œ

Failure is possibly caused by failed power supply 
circuit or failed earthing circuit of diagnosis con-
nector.

PROBABLE CAUSE

œ

Failed diagnosis connector

œ

Open/short circuit in diagnosis connector circuit

œ

Failed MUT-II

AK300300

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

15

15A

Fusible link (1)

C-24

Data link connector

15

C-116

C-204

C-205

R

R

W-B

B

B

1

12

16

4

5

J/B

Data link connector circuit

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

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-180

DIAGNOSIS PROCEDURE

STEP 1: Check connector: C-24 diagnosis 
connector

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Repair.

STEP 2: Measure resistance at C-24 diagnosis 
connector.

œ

Disconnect connector, and measure at harness 
side.

œ

Resistance between terminal No. 4 and earth, 
also between terminal No. 5 and earth.

OK: 2 

W

 or less

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Check and repair harness between C-24 

(terminal No. 4) diagnosis connector and 
body earth, also between C-24 (terminal No. 
5) diagnosis connector and body earth.

œ

Check earthing line for open circuit 
and damage.

STEP 3: Measure voltage at C-24 diagnosis 
connector.

œ

Disconnect connector, and measure at the har-
ness side.

œ

Voltage between terminal No. 16 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Check intermediate connectors C-116, C-204 

and C-205, and repair if necessary. If 
connectors are normal, check and repair 
harness between C-24 (terminal No. 16) 
diagnosis connector and battery.

œ

Check power supply line for 
open/short circuit.

STEP 4: Replace MUT-II

œ

After replacing the MUT-II, re-check the trouble 
symptoms.

Q: Does trouble symptom persist?

YES : 

Go to Step 5 .

NO : 

Check end

AK203424

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

Harness side connector

AE

Connector: C-24

C-24 (B)

AK203424

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

Harness side connector

AE

Connector: C-24

C-24 (B)

AK203424

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

Harness side connector

AE

Connector: C-24

C-24 (B)

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-181

STEP 5: Check harness between C-24 (terminal 
No. 6) diagnosis connector and battery.

NOTE: Before checking harness, check intermediate 
connectors C116, C-204 and C-205, and repair if 
necessary.

œ

Check power supply line for damage.

Q: Is the check result normal?

YES : 

Check and repair harness between C-24 

(terminal No. 4 and No. 5) diagnosis 
connector and body earth.

œ

Check earthing line for damage.

NO : 

Repair.

AK203424

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

Harness side connector

AE

Connector: C-24

C-24 (B)

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-182

Inspection Procedure 2: Communication with Engine-ECU only is not Possible.

OPERATION

œ

There is data communication between diagnosis 
connector output terminal (terminal No. 7) and 
engine-ECU (terminal No. 62).

COMMENT ON TROUBLE SYMPTOM

œ

Failure is possibly caused by failed power supply 
circuit or failed earthing circuit of engine-ECU.

PROBABLE CAUSE

œ

Open/short circuit in engine-ECU power circuit

œ

Between engine-ECU and diagnosis connector 
for short circuit 

œ

Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1: Check engine warning lamp.

œ

Ignition switch: OFF 

“

 ON

Q: Is lamp illuminating for few seconds?

YES : 

Go to Step 2 .

NO : 

Check engine-ECU power supply, engine 
control relay and ignition switch IG1 system 
(Refer to Inspection Procedure 23 

3

13A





).

AK300301

57 58

60 61

53

52

51

55

54

56

59

62

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

Engine-ECU

J/C (3)
C-02

Data link connector

C-136

C-24

62

O-W

O-W

O-L

5

C-105

32

29

7

Data link connector circuit

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