Mitsubishi Outlander (2003+). Manual — part 73

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-155

STEP 4.Check harness between C-137 (terminal
No. 86) engine-ECU connector and B-115
(terminal No. 3) Vehicle speed sensor connector.

NOTE: Before checking harness, check intermediate
connector C-16, and repair if necessary.

œ

Check output line for open circuit and damage.

Q: Is the check result normal?

YES :

Go to Step 5 .

NO :

Repair.

STEP 5.Check the trouble symptoms.

Q: Does trouble symptom persist?

YES :

Replacing engine-ECU.

NO :

Intermittent malfunction (Refer to GROUP
00 - How to Use Troubleshooting/Inspection
Service Points

3

00

).

AK300254

82

78

8180

89

90

91

92

79

87

71

74 73 72

76 75

77

85

88

83

84

86

AB

CONNECTOR: C-137

C-137

Harness side connector

AK300285

1

2

3

AB

Harness side
connector

CONNECTOR: B-115

B-115 (B)

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-156

Code No. P0505: Idle Speed Control Servo System

AK300286

1 2
4 5 6

3

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-105

Idle speed control servo

B-17X

Engine control relay

1

L-Y

Y-L

W

G-Y

1

R

R

R

2

2

3

4

5

6

Engine-ECU

4

17

5

18

Idle speed control servo circuit

W-B

W-B

Battery

4

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-157

OPERATION

œ

The power is supplied to the idle speed control
servo (terminal No. 2 and No. 5) from the engine
control relay (terminal No. 1).

œ

The engine-ECU (terminal No. 4, No. 5, No. 17
and No. 18) makes power transistor in the unit be
in "ON" position in order, and that makes currents
go on the idle speed control servo (terminal No.
1, No. 3, No. 4 and No. 6).

FUNCTION

œ

The idle speed control servo opens and closes
the servo valve in response to a signal from the
engine-ECU to control the intake air flow rate dur-
ing idling.

TROUBLE JUDGMENT

Check conditions

œ

The vehicle speed has reached 1.5 km/h or more
at least once.

œ

During the closed-loop idle speed control.

Judgment Criteria

œ

The actual idle speed is higher than the target
idle speed by 300 r/min or more for 10 seconds.

Check conditions

œ

The vehicle speed has reached 1.5 km/h or more
at least once.

œ

During the closed-loop idle speed control.

œ

The highest ambient temperature at the last drive
is 45

•

C or less.

œ

The engine coolant temperature is approximately.
82

•

C or higher.

œ

The battery voltage is 10 V or more.

œ

The intake air temperature is

-

10

•

C or higher.

Judgment Criteria

œ

The actual idle speed is higher than the target
idle speed by 200 r/min or more for 10 seconds.

Check conditions

œ

During the closed-loop idle speed control.

œ

The engine coolant temperature is approximately.
82

•

C or higher.

œ

The battery voltage is 10 V or more.

œ

The power steering switch is in OFF position.

œ

The charging efficiency is 40 % or less.

œ

The intake air temperature is

-

10

•

C or higher.

Judgment Criteria

œ

The actual idle speed is higher than the target
idle speed by 100 r/min or more for 10 seconds.

PROBABLE CAUSE

œ

Failed idle speed control servo

œ

Open/short circuit in idle speed control servo cir-
cuit or loose connector contact

œ

Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. 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 :

Go to Step 2 .

STEP 2. Connector check: B-105 idle speed
control servo connector

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair.

STEP 3. Check idle speed control servo itself.

œ

Check idle speed control servo itself (Refer to

3

13A

).

Q: Is the check result normal?

YES :

Go to Step 4 .

NO :

Replace idle speed control servo.

1

2

3

4

5

6

AK300287

Harness side
connector

B-105 (B)

AB

Connector: B-105

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-158

STEP 4. Measure voltage at B-105 idle speed
control servo connector.

œ

Disconnect connector, and measure at harness
side.

œ

Ignition switch: ON

œ

Voltage between terminal No. 2 and earth, also
between terminal No. 5 and earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 6 .

NO :

Go to Step 5 .

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

Q: Is the check result normal?

YES :

Check and repair 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
open/short circuit.

NO :

Repair.

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

1

2

3

4

5

6

AK300287

Harness side
connector

B-105 (B)

AB

Connector: B-105