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