Mitsubishi Outlander (2003+). Manual - part 74

 

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Mitsubishi Outlander (2003+). Manual - part 74

 

 

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-159

STEP 6. Measure voltage at C-134 engine-ECU 
connector.

œ

Disconnect connector, and measure at harness 
side.

œ

Ignition switch: ON

œ

Voltage between terminal No. 4 and earth, 
between terminal No. 5 and earth, between termi-
nal No. 17 and earth, also voltage between termi-
nal No. 18 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Check and repair harness between B-105 

idle speed control servo and C-134 engine-
ECU.

1. Harness between idle speed control 

servo terminal No. 1 and engine-
ECU connector terminal No. 4

2. Harness between idle speed control 

servo terminal No. 3 and engine-
ECU connector terminal No. 17

3. Harness between idle speed control 

servo terminal No. 4 and engine-
ECU connector terminal No. 5

4. Harness between idle speed control 

servo terminal No. 6 and engine-
ECU connector terminal No. 18

œ

Check power supply line for 
open/short circuit.

STEP 7. Connector check: C-134 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair.

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

1

2

3

4

5

6

AK300287

Harness side
connector

B-105 (B)

AB

Connector: B-105

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-160

STEP 8. Check harness between B-105 idle 
speed control servo and C-134 engine-ECU.

1. Harness between idle speed control servo termi-

nal No. 1 and engine-ECU connector terminal 
No. 4

2. Harness between idle speed control servo termi-

nal No. 3 and engine-ECU connector terminal 
No. 17

3. Harness between idle speed control servo termi-

nal No. 4 and engine-ECU connector terminal 
No. 5

4. Harness between idle speed control servo termi-

nal No. 6 and engine-ECU connector terminal 
No. 18

œ

Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair.

STEP 9. Check harness between B-105 (terminal 
No. 2 or No. 5) idle speed control servo 
connector and B-17X (terminal No. 1) engine 
control relay connector.

œ

Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Repair.

STEP 10. MUT-II Data List

œ

Refer to Data list reference table 

3

13A



.

a. Item 45: Idle speed control position

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.

1

2

3

4

5

6

AK300287

Harness side
connector

B-105 (B)

AB

Connector: B-105

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

1

2

3

4

5

6

AK300287

Harness side
connector

B-105 (B)

AB

Connector: B-105

AK300255

2

1

3

4

Relay box’s
triangle marks

AB

CONNECTOR: B-17X

B-17X

Harness side
connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-161

Code No. P0551: Power Steering Fluid Pressure Switch System

CONDITION

œ

The battery voltage is applied to the power steer-
ing fluid pressure switch (terminal No. 1) from the 
engine-ECU (terminal No. 37).

FUNCTION

œ

It is detected whether a load is applied on the 
power steering fluid pump by steering or not, and 
the signal is inputted to the engine-ECU. When 
the power steering fluid pressure switch "ON" sig-
nal (a large load on the power steering fluid 
pump) is inputted, the engine-ECU provides the 
idle-up control.

TROUBLE JUDGMENT

Check Conditions

œ

The intake air temperature is 

-

10

•

C or higher.

œ

The engine coolant temperature is approximately 
30

•

C or higher.

œ

Repeat, 10 times or more, the *1 running and 
stop also *2 running.
*1 running: engine speed of 2,500 r/min or more 

(Vehicle speed of 50 km/h or more).

*2 running: Vehicle speed of 1.5 km/h or less.

Judgment Criteria

œ

The power steering pressure switch remains in 
ON position.

PROBABLE CAUSE

œ

Failed power steering fluid pressure switch

œ

Open/short circuit in power steering fluid pres-
sure switch circuit or loose connector contact

œ

Failed engine-ECU

AK300288

1

34

33

32

36

35

37

42

45

31

39

38

46

40 41

43 44

Engine-ECU

C-135

37

Y

Power steering pressure switch

      B-28 
(MU801211)

1

Power steering pressure switch

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-162

DIAGNOSIS PROCEDURE

STEP 1. Connector check: B-28 power steering 
fluid pressure switch connector

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Repair.

STEP 2. Measure voltage at B-28 power steering 
fluid pressure switch 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 8 .

NO : 

Go to Step 3 .

STEP 3. Measure voltage at C-135 engine-ECU 
connector.

œ

Measure engine-ECU terminal voltage.

œ

Ignition switch: ON

œ

Voltage between terminal No. 37 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Go to Step 5 .

AK300289

1

AB

Harness side
connector

CONNECTOR: B-28

B-28 (B)

AK300289

1

AB

Harness side
connector

CONNECTOR: B-28

B-28 (B)

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

 

 

 

 

 

 

 

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