Mitsubishi Pajero Pinin. Manual - part 130

 

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Mitsubishi Pajero Pinin. Manual - part 130

 

 

MPI <4G9> – 

On-vehicle Service

13C-106

INJECTOR CHECK

Measurement of Resistance between Terminals

1.

Remove the injector connector.

2.

Measure the resistance between terminals.

Standard value: 13 – 16 

 (at 20

_

C)

3.

Install the injector connector.

Checking 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 P.13C-100.)

2.

Remove the injector.

3.

Arrange the special tool (injector test set), adaptor, fuel
pressure regulator and clips as shown in the illustration
below.

MB991607

High-pressure fuel hose

MD998741

MD998706

Return hose

Battery

Injector

Pressure regulator
(MD116395)

Clip (MB991608)

4.

Connect the MUT-

II

 to the diagnosis connector.

5.

Turn the ignition switch to ON. (But do not start the engine.)

6.

Select “Item No.7” 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.

Injectors

Main hose

Battery

Injector

Return hose

MPI <4G9> – 

On-vehicle Service

MPI <4G9> – 

On-vehicle Service

13C-107

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

Checking the Operation Sound

1.

Check that the engine coolant temperature is 20

_

C or

below.

NOTE
Disconnecting the engine coolant temperature sensor
connector and connecting the harness-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 switched ON. (But do not
start 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 control
unit.

Checking the Coil Resistance

1.

Disconnect the idle speed control servo connector.

2.

Measure the resistance between terminal 2 and either
terminal 1 or terminal 3 of the connector at the idle speed
control servo side.

Standard value: 27 – 33 

 (at 20

_

C)

3.

Measure the resistance between terminal 5 and either
terminal 6 or terminal 4 of the connector at the idle speed
control servo side.

Standard value: 27 – 33 

 (at 20

_

C)

Idle speed 
control servo

MPI <4G9> – 

On-vehicle Service

13C-108

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 (approx.
6 V) to the terminals 2 and 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 red and black clip.

(2) Connect the negative (–) terminal of the power supply

to the blue and black clip.

(3) Connect the negative (–) terminal of the power supply

to the blue and yellow clip.

(4) Connect the negative (–) terminal of the power supply

to the red and yellow clip.

(5) Connect the negative (–) terminal of the power supply

to the red and black clip.

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

6.

If, as a result of these tests, vibration is detected, the
stepper motor can be considered to be normal.

PURGE CONTROL SOLENOID VALVE CHECK
<Vehicles with catalytic converter>

Refer to GROUP 17 – Emission Control System.

EGR CONTROL SOLENOID VALVE CHECK

Refer to GROUP 17 – Emission Control System.

MPI <4G9> – 

Injector

13C-109

INJECTOR

REMOVAL AND INSTALLATION

Pre-removal Operation

D

Fuel Discharge Prevention (Refer to P.13C-100)

D

Air Cleaner and Air Intake Pipe Removal 
(Refer to GROUP 15.)

Post-installation Operation

D

Air Cleaner and Air Intake Pipe Installation 
(Refer to GROUP 15.)

D

Accelerator Cable Adjustment 
(Refer to GROUP 17 – On-vehicle Service.)

11

O-ring

5, 8

15

14

O-ring

Engine oil

1

2

3

4

12

13

11

10

5

8

7

6

14

15

9

12 

±

 1 N·m

9.0 

±

 2.0 N·m

5.0 

±

 1.0 N·m

9.0 

±

 2.0 N·m

9.0 

±

 2.0 N·m

Removal steps

1. Accelerator cable connection
2. PCV hose
3. Injector connector
4. Injector harness clamp

"

A

A

5. High-pressure fuel hose connection
6. Fuel return hose connection
7. Vacuum hose connection

"

A

A

8. Fuel pressure regulator

9. Fuel hose

10. Fuel return pipe

A

A

"

11. Delivery pipe

12. Insulator
13. Insulator

A

A

" "

A

A

14. Injector
15. Grommet

 

 

 

 

 

 

 

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