Mitsubishi Outlander (2003+). Manual — part 57

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-91

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

œ

Engine: Idling

œ

Transmission: Neutral

œ

Voltage between terminal No. 1 and earth.

OK: Waveforms should be display on
Inspection 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-92

Code No. P0202: No. 2 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-93

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. 14) 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 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. 2 injector

œ

Open/short circuit in No. 2 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 02: No. 2 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-02 No. 2 injector
connector

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair.

STEP 3. Measure at resistance B-02 No. 2 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. 2 injector.

AK300265

M

1

2

Harness side connector

Connector: B-02

B-02 (GR)

AD

B-02 (GR)

AK300265

M

1

2

Harness side connector

Connector: B-02

B-02 (GR)

AD

B-02 (GR)

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-94

STEP 4. Measure voltage at B-02 No. 2 injector
connector.

œ

Disconnect connector, and measure at harness
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 5 .

STEP 5. Connector check: B-17X engine control
relay connector

Q: Is the check result normal?

YES :

Check and repair 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
open/short circuit and damage.

NO :

Repair.

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

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Repair.

AK300265

M

1

2

Harness side connector

Connector: B-02

B-02 (GR)

AD

B-02 (GR)

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)

AK300255

2

1

3

4

Relay box’s
triangle marks

AB

CONNECTOR: B-17X

B-17X

Harness side
connector