Mitsubishi Pajero Pinin. Manual - part 91

GDI  – 

On-vehicle Service

13A-113

5.

Use a jumper wire to connect terminal 1 (red clip) of the
oxygen sensor connector to the battery (+) terminal and
terminal 3 (blue clip) to the battery (–) terminal.

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

6.

Connect a digital voltage meter between terminal 2 (black
clip) and terminal 4 (white clip).

7.

While repeatedly racing the engine, measure the oxygen
sensor output voltage.

Standard value:

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 nor-
mal oxygen sensor will
output a voltage of 0.6 –
1.0 V.

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.

<Oxygen sensor (rear)>

1.

Disconnect the oxygen sensor connector and connect the
special tool (test harness set) to the connector on the
oxygen sensor side.

2.

Make sure that there is continuity (11 – 18 

Ω

 at 20



C)

between terminal 1 (red clip of special tool) and terminal
3 (blue clip of special tool) on the oxygen sensor connector.

3.

If there is no continuity, replace the oxygen sensor.

NOTE
(1) If the MUT-

II

 does not display the standard value

although no abnormality is found by the above
mentioned continuity test and harness check, replace
the oxygen sensor (rear).

(2) For removal and installation of the oxygen sensor,

refer to GROUP 15 – Exhaust Pipe and Main Muffler.

White

Black

Red

Blue

MD9998464

Oxygen sensor (rear)

Equipment side connector

Red

MD998464

Blue

GDI  – Fuel Pump (High Pressure)

13A-114

FUEL PUMP (HIGH PRESSURE)

REMOVAL AND INSTALLATION

Pre-removal and Post-installation Operation



Engine Cover Removal and Installation (Refer to
GROUP 11A – Camshaft and Camshaft Oil Seal.)



Prevention of Fuel Discharge <before removal only>



Fuel Leak Check <after installation only>



High-pressure Fuel Line Air Bleeding 
<after installation only> (P.13A-116.)



Resonance Tank Removal and Installation

2

3

1

23 Nm

5

6

4

7

8

9

10

10  – 12 Nm

5.0 Nm 

→

 17 Nm

10  – 13 Nm

Apply engine oil to all
O-rings during installation.

5.0 Nm

10  – 13 Nm

Removal steps



A



1. Fuel pump protector
2. Furl return hose connection



C



3. Fuel pressure hose connection



C



4. O-ring



B



5. Fuel pipe



B



6. Back-up ring A



B



7. O-ring



B



8. Back-up ring B



A



9. Fuel pump (high-pressure)

10. O-ring

GDI  – Fuel Pump (High Pressure)

13A-115

REMOVAL SERVICE POINT



A



FUEL PUMP PROTECTOR REMOVAL

Jack up the transmission, and create sufficient clearance
between the engine and the front deck. Then remove the
fuel pump protector.

INSTALLATION SERVICE POINTS



A



FUEL PUMP (HIGH-PRESSURE) INSTALLATION

1.

Apply clean engine oil to the O-ring and the roller of the
fuel pump (high-pressure).

2.

Insert the fuel pump (high-pressure) into the cylinder head
mounting hole squarely, and finger-tighten the mounting
bolts. The mounting bolts should be tightened securely
at step 



B



.



B



BACK-UP RING B/O-RING/BACK-UP RING A/FUEL
PIPE INSTALLATION

1.

Install the back-up rings and the O-ring as shown in the
illustration.

Caution
(1) Install the back-up ring B facing its cutaway

surface toward the opposite side of the O-ring
as shown in the illustration.

(2) Confirm the outer diameter of the back-up ring

A. Take care not to install the back-up ring for
the fuel pressure sensor by mistake. (Outer
diameter of the back-up ring A: 14.8 mm)

2.

Apply a small amount of fresh engine oil to the O-ring.

Caution
Take care not to let any of the engine oil get inside
the fuel pump (high-pressure) or the delivery pipe
assembly.

3.

Install the fuel pipe into the fuel pump (high pressure) and
the delivery pipe ports squarely. Insert the pipe securely,
being careful not to twisting it, and then tighten the mounting
bolts to the specified torque.

Tightening torque: 10 – 13 Nm

A

A

Cutaway
surface

Back-up ring A
(either side)

O-ring

Back-up 
ring B

Section A –  A

GDI  – Fuel Pump (High Pressure)

13A-116

4.

Tighten the fuel pump (high-pressure) mounting bolts to
5.0 Nm in the order shown.

5.

Tighten the mounting bolts to 17 Nm in the sequence
shown as second stage. The final tightening torques should
not vary more than 2.0 Nm. 



C



O-RING/FUEL PRESSURE HOSE INSTALLATION

1.

Apply a small amount of fresh engine oil to the O-ring.

Caution
Take care not to let any of the engine oil get inside
the fuel pump (high pressure).

2.

While being careful not to damage the O-ring, turn the
fuel pressure hose to the left and right and connect it
to the fuel pump (high pressure). After connecting, check
that the hose turns smoothly.

3.

If the hose does not turn smoothly, the cause may be
that the O-ring is getting caught. Disconnect the hose,
check the O-ring for damage and re-connect the hose
to the fuel pump (high pressure) and then re-check.

4.

Tighten the fuel pressure hose mounting bolts to the
specified toque.

Tightening torque: 5.0 Nm

AIR-BLEEDING HIGH-PRESSURE FUEL LINE

1.

Run the engine at 2000 r/min for at least 15 seconds
in order to bleed air from the high-pressure fuel line. 

NOTE
If air is trapped in the high-pressure fuel line due to the
removal of fuel pipe, diagnosis code No. P.0190 will be
set as abnormal fuel pressure.

2.

Finally confirm diagnosis code by using the MUT-

II

. If

diagnosis code, which indicates defective fuel pressure
sensor system, has been set, erase the code. 

1

3

4

2