Mitsubishi Outlander (2003+). Manual — part 104

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-279

STEP 20. Connector check: C-135 engine-ECU
connector

Q: Is the check result normal?

YES :

Check intermediate connectors C-105 and

C-116, and repair if necessary. If
intermediate connectors are normal, check
and repair harness between A-02 (terminal
No. 2) A/C pressure sensor connector and
C-135 (terminal No. 42) engine-ECU
connector.

œ

Check power line for open circuit and
damage.

NO :

Repair.

STEP 21. Connector check: C-135 engine-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 8 .

NO :

Repair.

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

AK300340

1

2

3

Harness side
connector

A-02 (B)

AB

Connector: A-02

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-280

Inspection Procedure 30: Ignition Circuit System

3

4 5 6

1 2

1 2 3

1 2 3

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

AK300341

LOCK

ACC

IG1

R

IG2

ST

1

10A

Ignition coil 1

Engine-ECU

B-110

Ignition coil 2

B-111

2

1

1

3

3

2

10

23

1

Capacitor

B-107

16

26

Ignition switch

C-303

L-B

W

W

W

W

W

B-L

B

B

B

W-L

2

6

10

C-205

C-116

A-14

C-203

J/B

Ignition circuit

C-134

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

AB

Spark
plug

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-281

OPERATION

œ

The battery voltage is applied to the ignition coil
(terminal No. 1) from the ignition switch and is
earthed to the vehicle body from the ignition coil
(terminal No. 2).

œ

A power voltage of 12 V is applied to the ignition
coil output terminal (terminal No. 3) from the
engine-ECU (terminal No. 10 and No. 23).

FUNCTION

œ

When the engine-ECU makes the power transis-
tor in the unit be in "OFF" position, the battery
voltage in the unit is applied to the power transis-
tor unit, and that makes the power transistor unit
be in "ON" position. The engine-ECU makes the
power transistor in the unit be in "ON", and that
makes the power transistor unit be in "OFF" posi-
tion.

œ

In response to the signal from the engine-ECU,
the power transistor unit is in "ON" position. The
primary current is going to the ignition coil. When
the power transistor unit is in "OFF" position, the
primary current is interrupted and high voltage is
generated in the secondary coil.

PROBABLE CAUSE

œ

Failed ignition coil

œ

Failed spark plug

œ

Failed spark plug cable

œ

Open/short circuit in ignition primary circuit or
loose connector contact

œ

Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check spark plug cable itself.

œ

Check spark plug cable itself (Refer to GROUP
16

-

Ignition System

-

On-vehicle Service

3

16

).

Q: Is the check result normal?

YES :

Go to

Step 2 .

NO :

Replace spark plug cable.

STEP 2. Check spark plug.

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Replace spark plug.

STEP 3. Connector check: B-111 and B-110
ignition coil connectors

Q: Is the check result normal?

YES :

Go to Step 4 .

NO :

Repair.

STEP 4. Check ignition coil itself.

œ

Check ignition coil itself (Refer to GROUP 16

-

Ignition System

-

On-vehicle Service

3

16

).

Q: Is the check result normal?

YES :

Go to Step 5 .

NO :

Replace ignition coil.

STEP 5. Measure voltage at B-111 and B-110
ignition coil connectors.

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 7 .

NO :

Go to Step 6 .

AK300308

1

2

3

AB

Harness side
connector

B-111 (GR)

B-110 (GR)

Connector: B-110, B-111

AK300308

1

2

3

AB

Harness side
connector

B-111 (GR)

B-110 (GR)

Connector: B-110, B-111

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-282

STEP 6. Connector check: C-303 ignition switch
connector

Q: Is the check result normal?

YES :

Check intermediate connectors A-14, C-

203, C-205 and C-116, and repair if
necessary. If intermediate connectors are
normal, check and repair harness between
C-303 (terminal No. 2) ignition switch
connector and B-111 (terminal No. 1)
ignition coil connector, also between C-303
(terminal No. 2) ignition switch connector
and B-110 (terminal No. 1) ignition coil
connector.

œ

Check power supply line for
open/short circuit.

NO :

Repair.

STEP 7. Measure voltage at B-111 and B-110
ignition coil connectors.

œ

Disconnect connector, and measure at harness
side.

œ

Engine: Cranking

œ

Voltage between terminal No. 3 and earth.

OK: 0.5

-

4.0 V

Q: Is the check result normal?

YES :

Go to Step 13 .

NO :

Go to Step 8 .

1

2

3

4

5

6

AK300304

CONNECTOR: C-303

C-303

Harness side
connector

AB

AK300308

1

2

3

AB

Harness side
connector

B-111 (GR)

B-110 (GR)

Connector: B-110, B-111

AK300308

1

2

3

AB

Harness side
connector

B-111 (GR)

B-110 (GR)

Connector: B-110, B-111