Mitsubishi Outlander (2003+). Manual — part 61

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-107

œ

The number of misfiring (that is 1.5 times the
emission standard limit) is beyond the specified
number (of 2 % on more than the two cylinders)
with the engine speed of 1000 r/min.

PROBABLE CAUSE

œ

Ignition system related part(s) failed

œ

Failed crank angle sensor

œ

Incorrect air-fuel ratio

œ

Low compression pressure

œ

Failed coolant temperature sensor

œ

Skipping of timing belt teeth.

œ

EGR system and EGR valve failed

œ

Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1.MUT-II data list

œ

Item 22: Crank angle sensor

OK: Keep the engine speed constant to
make the pulse width of output waveform
constant.

Q: Is the check result normal?

YES :

Go to Step 2 .

NO :

Check crank angle sensor system (Refer to
Code No. P0335

3

13A

).

STEP 2.MUT-II data list

œ

Refer to Data list reference table

3

13A

 .

a. Item 21: Engine coolant temperature sensor
b. Item 81: Long-term fuel compensation

c. Item 82: Short-term fuel compensation

Q: Are the check results normal?

YES :

Go to Step 3 .

NO :

Perform the diagnosis code classified check
procedure for the sensor that has shown an
abnormal data valve (Refer to, Inspection
Chart for Diagnosis Codes

3

13A

).

STEP 3.Check ignition coil spark.

Q: Is the check resuit normal?

YES :

Go to Step 4 .

NO :

Check ignition circuit system (Refer to
Inspection procedure 29

3

13A

).

STEP 4.Connector check: Injector connector

a. B-01 (No.1 injector connector)
b. B-02 (No.2 injector connector)

c. B-04 (No.3 injector connector)

d. B-05 (No.4 injector connector)

Q: Are the check results normal?

YES :

Go to Step 5 .

NO :

Repair.

STEP 5.Check injector itself.

œ

Check Injector itself (Refer to

3

13A

).

Q: Is the check result normal?

YES :

Go to Step 6 .

NO :

Replace injector.

AK300265

M

1

2

Harness side connector

Connector: B-01, B-02, B-04, B-05

B-02 (GR)

AB

B-01 (GR) B-02 (GR) B-04 (GR) B-05 (GR)

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-108

STEP 6.Connector check: B-17X engine control
relay connector and B-134 engine-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Repair.

STEP 7. Check harness between B-17X engine
control relay connector and injector connector.

a. Check harness between B-17X (terminal No. 1)

engine control relay connector and B-01 (terminal
No. 1) No. 1 injector connector.

b. Check harness between B-17X (terminal No. 1)

engine control relay connector and B-02 (terminal
No. 1) No. 2 injector connector.

c. Check harness between B-17X (terminal No. 1)

engine control relay connector and B-04 (terminal
No. 1) No. 3 injector connector.

d. Check harness between B-17X (terminal No. 1)

engine control relay connector and B-05 (terminal
No. 1) No. 4 injector connector.

œ

Check power supply line for damage.

Q: Are the check results normal?

YES :

Go to Step 8 .

NO :

Repair.

AK300255

2

1

3

4

Relay box’s
triangle marks

AB

CONNECTOR: B-17X

B-17X

Harness side
connector

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

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-01, B-02, B-04, B-05

B-02 (GR)

AB

B-01 (GR) B-02 (GR) B-04 (GR) B-05 (GR)

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-109

STEP 8. Check harness between injector
connector and C-134 engine-ECU connector.

a. Check harness between B-01 (terminal No. 2)

No. 1injector connector and C-134 (terminal No.
1) engine-ECU connector.

b. Check harness between B-02 (terminal No. 2)

No. 2 injector connector and C-134 (terminal No.
14) engine-ECU connector.

c. Check harness between B-04 (terminal No. 2)

No. 3 injector connector and C-134 (terminal No.
2) engine-ECU connector.

d. Check harness between B-05 (terminal No. 2)

No. 4 injector connector and C-134 (terminal No.
15) engine-ECU connector.

œ

Check output line for damage.

Q: Are the check results normal?

YES :

Go to Step 9 .

NO :

Repair.

STEP 9. Measure fuel pressure.

œ

Measure fuel pressure (Refer to fuel pressure
test

3

13A



)

Q: Is the check result normal?

YES :

Go to Step 10 .

NO :

Repair.

STEP 10. Check for intake of air from intake hose
and inlet manifold.

Q: Is the check result normal?

YES :

Go to Step 11 .

NO :

Repair.

STEP 11. Check for skipped timing belt teeth.

Q: Is the check result normal?

YES :

Go to Step 12 .

NO :

Repair.

STEP 12. Exhaust gas recirculation system
check.

œ

Exhaust gas recirculation system check [Refer to
GROUP 17

-

Exhaust gas recirculation (EGR)

system

3

17

].

Q: Is the check result normal?

YES :

Replace engine-ECU

NO :

Repair.

AK300265

M

1

2

Harness side connector

Connector: B-01, B-02, B-04, B-05

B-02 (GR)

AB

B-01 (GR) B-02 (GR) B-04 (GR) B-05 (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-110

Code No. P0301: No. 1 cylinder mis-fire detection system

OPERATION

œ

Refer to P0201 injector circuit

3

13A

 .

FUNCTION

œ

If a misfire occurs while the engine is running, the
engine speed changes for an instant.

œ

The engine-ECU checks for such changes in
engine speed.

TROUBLE JUDGMENT

Check Conditions

œ

5 seconds later after the engine has started up.

œ

The engine speed is 500

-

4,500 r/min.

œ

The engine coolant temperature is

-

10

•

C or

higher.

œ

The intake air temperature is

-

10

•

C or higher.

œ

The barometric pressure is 72 kPa or more.

œ

The volumetric efficiency is 30

-

60 %.

œ

The adaptive learning has been completed with
the vane that generates the crankshaft position
signals.

œ

During the engine operation except the shift
change or low speed driving and rapid accelera-
tion and deceleration, also intermittent operation
of air compressor (A/C: within the 3 seconds after
changing to ON from OFF or to OFF from ON).

œ

The throttle deviation is within the range of

-

0.059 V/10ms to 0.059 V/10ms.

Judgment Criterion

œ

The number of misfiring (in the catalyst tempera-
ture of above 950

•

C) is beyond the specified

number (of 7.3 % on more than the two cylinders)
with the engine speed of 200 r/min.

Or

œ

The number of misfiring (that is 1.5 times the
emission standard limit) is beyond the specified
number (of 2 % on more than the two cylinders)
with the engine speed of 1,000 r/min.

PROBABLE CAUSE

œ

Ignition system related part(s) failed

œ

Low compression pressure

œ

Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1.Check ignition coil spark.

Q: Is the check result normal?

YES :

Go to Step 2 .

NO :

Check ignition Circuit System (Refer to
Inspection procedure 29

3

13A

)

STEP 2.Connector check: B-01 No.1 injector
connector

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair.

STEP 3.Check No.1 injector itself.

œ

Check Injector itself (Refer to

3

13A

).

Q: Is the check result normal?

YES :

Go to Step 4 .

NO :

Replace No.1 injector.

AK300265

M

1

2

Harness side connector

AC

B-01 (GR)

Connector: B-01