Mitsubishi Outlander (2003+). Manual — part 113

ON-VEHICLE SERVICE

MULTIPORT FUEL INJECTION (MFI)

13A-315

6. Connect a digital voltage meter between terminal

No. 3 and No. 4.

7. While repeatedly racing the engine, measure the

oxygen sensor output voltage.

Standard value:

CAUTION

œ

Be very careful when connecting the jumper
wire; incorrect connection can damage the
oxygen sensor.

œ

Be careful the heater is broken when voltage
of beyond 8V is applied to the oxygen sensor
heater.

NOTE: If the sufficiently high temperature (of
approximate 400

•

C or more) is not reached

although the oxygen sensor is normal, the output
voltage would be possibly low although the rich
air-fuel ratio. Therefore, if the output voltage is
low, use a jumper wire to connect the terminal
No.2 and the terminal No. 1 of the oxygen sensor
with a (+) terminal and (-) terminal of 8 V power
supply respectively, then check again.

8. If the sensor is defective, replace the oxygen

sensor.

NOTE: For removal and installation of the oxygen
sensor, refer to GROUP 15

-

Exhaust Pipe and

Main Muffler

3

15



.

INJECTOR CHECK

M1131005200327

Check the Operation Sound

1. Use a stethoscope to listen to the operation sound

(clicking) of the injectors while the engine is idling
or cranking.

CAUTION

Beware that the operation sounds of other injec-
tors can be heard even if the injector that is being
inspected might not be operating.
2. Verify that the operation sound increases with the

engine speed.

NOTE: If the operating sound cannot be heard,
inspect the injector actuation circuit.

Measurement of Resistance between Ter-
minals

1. Disconnect the injector connector.
2. Measure the resistance between terminals.

Standard value: 10.5

-

13.5

W

(at 20

•

C)

3. Connect the injector connector.

Check the Injection Condition

1. Following the steps below, bleed out the residual

pressure within the fuel pipe line to prevent flow of
the fuel (Refer to

3

13A

).

2. Remove the injector.
3. Assemble the following special tools as shown in

Fig.

œ

Injector test set (MD998706)

œ

Injector test harness (MB991607)

œ

Injector test adaptor (MD998741)

œ

Clip (MB991608)

Engine

Oxygen
sensor
output
voltage

Remarks

When
racing the
engine

0.6

-

1.0 V

If you make the air-fuel
ratio rich by racing the
engine repeatedly, a
normal oxygen sensor
will output a voltage of
0.6

-

1.0 V.

AK000121

Oxygen sensor

MB991658

AC

AK300358

1 2

AB

Injector

Equipment side
connector

ON-VEHICLE SERVICE

MULTIPORT FUEL INJECTION (MFI)

13A-316

4. Connect the MUT-II to the diagnosis connector.
5. Turn the ignition switch to "ON" position (But do

not start the engine).

6. Select "Item No. 07" from the MUT-II Actuator test

to drive the fuel pump.

7. Activate the injector and check the atomized

spray condition of the fuel.

The condition can be considered satisfactory
unless it is extremely poor.

8. Stop the actuation of the injector, and check for

leakage from the injector’s nozzle.

Standard value: 1 drop or less per minute

9. Activate the injector without activating the fuel

pump; then, when the spray emission of fuel from
the injector stops, disconnect the special tool and
restore it to its original condition.

10.Disconnect the MUT-II.

IDLE SPEED CONTROL (ISC) SERVO
(STEPPER MOTOR) CHECK

M1131005400417

Check the Operation Sound

1. Check that the engine coolant temperature is

20

•

C or below.

NOTE: Disconnecting the engine coolant temper-
ature sensor connector and connecting the har-
ness-side of the connector to another engine
coolant temperature sensor that is at 20

•

C or

below is also okay.

2. Check that the operation sound of the stepper

motor can be heard after the ignition is turned to
the "ON" position (but without starting the engine).

3. If the operation sound cannot be heard, check the

stepper motor’s activation circuit.

If the circuit is normal, it is probable that there is a
malfunction of the stepper motor or of the engine-
ECU.

AK101794

High-pressure fuel hose

MD998741

MB991607

Clip (MB991608)

Injector

MD998706

Pressure regulator

Return hose

Battery

AD

AK101795

Return hose

Injector

AC

Battery

Mainhose

AK300359

1 2

3

4 5

6

AB

Equipment side
connector

Idle speed
control servo

ON-VEHICLE SERVICE

MULTIPORT FUEL INJECTION (MFI)

13A-317

Check the Coil Resistance

1. Disconnect the idle speed control servo

connector.

2. Measure the resistance between terminal No. 2

and either terminal No. 1 or terminal No. 3 of the
connector at the idle speed control servo side.

Standard value: 28

-

33

W

(at 20

•

C)

3. Measure the resistance between terminal No. 5

and either terminal No. 6 or terminal No. 4 of the
connector at the idle speed control servo side.

Standard value: 28

-

33

W

(at 20

•

C)

Operation Check

1. Remove the throttle body.
2. Remove the stepper motor.
3. Connect the special tool Test harness

(MB991709) to the idle speed control servo
connector.

4. Connect the positive (+) terminal of a power

supply (approximately 6 V) to the terminals No. 2
and No. 5.

5. With the idle speed control servo as shown in the

illustration, connect the negative (

-

) terminal of

the power supply to each clip as described in the
following steps, and check whether or not a
vibrating feeling (a feeling of very slight vibration
of the stepper motor) is generated as a result of
the activation of the stepper motor.
(1) Connect the negative (

-

) terminal of the power

supply to the terminal No. 1 and terminal No.
4.

(2) Connect the negative (

-

) terminal of the power

supply to the terminal No. 3 and terminal No.
4.

(3) Connect the negative (

-

) terminal of the power

supply to the terminal No. 3 and terminal No.
6.

(4) Connect the negative (

-

) terminal of the power

supply to the terminal No. 1 and terminal No.
6.

(5) Connect the negative (

-

) terminal of the power

supply to the terminal No. 1 and terminal No.
4.

(6) Repeat the tests in sequence from (5) to (1).

6. If vibration is detected during the test, the stepper

motor can be considered to be normal.

AKX01561

1 2 3
4 5 6

1 2 3
4 5 6

AE

AKX01626

INJECTOR

MULTIPORT FUEL INJECTION (MFI)

13A-318

INJECTOR

REMOVAL AND INSTALLATION

M1131007100649

REMOVAL SERVICE POINT

<<A>> FUEL DELIVERY PIPE AND FUEL INJEC-
TOR ASSEMBLY REMOVAL

CAUTION

Do not drop the injector.
Remove the fuel delivery pipe with the fuel injector
assembly attached to it.

INSTALLATION SERVICE POINT

>>A<< FUEL INJECTOR ASSEMBLY/DELIVERY
PIPE PRESSURE REGULATOR/FUEL HIGH-
PRESSURE HOSE INSTALLATION

CAUTION

Do not let the engine oil get into the delivery pipe
will be damaged.
1. Apply a drop of new engine oil to the O-ring.

Pre-removal Operation

œ

Fuel Discharge Prevention (Refer to

3

13A

).

œ

Air Cleaner Removal (Refer to GROUP 15, Air Cleaner

3

15

).

Post-installation Operation

œ

Air Cleaner Installation (Refer to GROUP 15, Air Cleaner

3

15

).

œ

Fuel Leakage Inspection.

AC300484 AB

8

5.0 ± 1.0 N·m

8.9 ± 1.9 N·m

11 ± 1 N·m

1

2

3

4

5

6

6,10

7

7,11

16

10

11

19

19

9

13

15

N

N

17

18

18

15

N

N

16

Engine Oil

14

12

Removal steps

1.

PCV hose connection

2.

Injector connector

3.

Idle speed control servo connector

4.

Throttle position sensor connector

5.

Emission control equipment hose
connector

>>A<<

6.

Fuel high-pressure hose
connection

7.

O-ring

8.

Fuel return hose connection

9.

Fuel hose

>>A<<

10. Delivery pipe pressure regulator
11. O-ring

<<A>>

12. Fuel delivery pipe and fuel injector

assembly

13. Insulators

>>A<<

14. Fuel injector assembly
15. O-ring
16. Fuel injector sheets
17. Insulators
18

Fuel injectors

19. Fuel delivery pipe