Mitsubishi Outlander GS45X. Manual - part 761

 

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Mitsubishi Outlander GS45X. Manual - part 761

 

 

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-867

FUEL TANK PUMP OPERATION CHECK

M1131002002438

Required Special Tool:
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

1. Using the scan tool MB991958, activate the fuel tank pump 

(integrated in the fuel tank pump module) to check the fuel 
tank pump operation.

2. If the fuel tank pump does not operate, follow the procedure 

below to check the pump for operation. If it is normal, check 
the driving circuit.

(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Remove the second seat assembly (Refer to GROUP 

52A, Second Seat Assembly 

P.52A-25

) and turn up the 

floor carpet.

(3) Remove the floor inspection lid (LH).

(4) Disconnect the fuel pump module connector.

(5) When the battery is connected to the fuel pump module 

connector (fuel pump module side), check that the pump 
operating sound can be heard. When the pump operating 
sound cannot be heard, replace the fuel pump module 
(Refer to GROUP 13C, On-Vehicle Service 

− Fuel Pump 

Module Replacemen

P.13C-9

) <FWD> or (Refer to 

GROUP 13C, On-Vehicle Service 

− Fuel Pump Module 

Replacement 

P.13C-11

) <AWD>.

NOTE: The operating sound of the fuel pump is difficult to 
be heard because the pump is in-tank type. Therefore, 
remove the fuel filler cap to check the sound from the fuel 
filler port.

(6) Connect the fuel pump module connector.
(7) Install the floor inspection lid (LH).

AC710046AB

Floor inspection lid (LH)

AC703400AB

Fuel pump module
connector

AC710087AB

Fuel pump module 
connector

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-868

(8) Return the floor carpet to the original condition and install 

the second seat assembly (Refer to GROUP 52A, 
Second Seat Assembly 

P.52A-25

).

FUEL PRESSURE TEST

M1131001901963

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

• MB991981: Fuel Pressure Gauge Set

• MB992001: Hose Adapter

• MB992049: Quick Connector

• MB992076: Injector Test Set

• MD998709: Hose Adapter

1. Release residual pressure from the fuel pipe line to prevent 

fuel spray. (Refer to 

P.13A-866

.)

WARNING

To prevent a fire, cover the hose connection with 
shop towels to prevent splashing of fuel that could be 
caused by some residual pressure in the fuel pipe 
line.

2. Disconnect the fuel high-pressure hose at the fuel rail side.

3. Assemble the special tool MB992076 (injector test set) as 

shown in figure according to the following procedure.

(1) Remove the injector installation adapter from the hose. 

Remove another hose together with the adapter and 
remove the adapter from the remaining hose.

(2) Install the special tool MB992049 (quick connector) and 

the special tool MB992001 (hose adapter) to the hose 
without the adapter.

(3) Remove the nipple of the bolt of the special tool 

MD998709 (hose adapter).

(4) Install the special tool prepared in the procedure (3) to 

the nipple that was removed together with hose in the 
procedure (1).

4. Install the special tool assembled in step 3 between the fuel 

rail and the fuel high-pressure hose.

AK502612AD

AKA00404 AE

MD998709

MB992001

MB992049

MB992076

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-869

<When using the fuel pressure gauge>

a. Via a suitable O-ring or gasket, install the fuel pressure 

gauge to the special tool that has already assembled as 
described.

<When using the special tool MB991981 (fuel pressure 

gauge set)>

a. Via a gasket, install the special tool MB991981 (fuel pres-

sure gauge set) into the special tool that has already 
assembled as described.

b. Connect the leads from the fuel pressure gauge set to the 

power supply (cigarette lighter socket) and special tool 
MB991824 (V.C.I).

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
5. Connect scan tool MB991958 to the data link connector.
6. Turn the ignition switch to the ON position (But do not start 

the engine).

7. Use Actuator test "item number 9" to drive the fuel pump. 

Check that there is no fuel leaking from any section when 
the fuel pump is operating.

8. Finish the actuator test or turn the ignition switch to the 

LOCK (OFF) position.

9. Start the engine and run at idle.
10.Measure fuel pressure while the engine is running at idle.

Standard value: Approximately 324 kPa (47 psi) at 
curb idle

11.Check to see that fuel pressure at idle does not drop even 

after the engine has been revved several times.

12.If any of fuel pressure measured in Step 10 to 11 is out of 

specification, troubleshoot and repair according to the table 
below.

AKA00405 AE

High-pressure
fuel hose

Fuel rail

O-ring or gasket

Fuel pressure
gauge set

AKA00406 AD

High-pressure
fuel hose

Fuel rail

Gasket

MB991981

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-870

13.Stop the engine and observe fuel pressure gauge reading. It 

is normal if the reading does not drop within two minutes. If it 
does, observe the rate of drop and troubleshoot and repair 
according to the table below. Start, then stop the engine.

14.Release residual pressure from the fuel pipe line. (Refer to 

P.13A-866

.)

WARNING

To prevent a fire, cover the hose connection with 
shop towels to prevent splash of fuel that could be 
caused by some residual pressure in the fuel pipe 
line.

15.Remove the fuel pressure gauge and special tool from the 

fuel rail.

16.Fit the fuel high-pressure hose to the fuel rail.
17.Check for fuel leaks.

(1) Use scan tool MB991958 to operate the fuel pump.
(2) Check the fuel line for leaks and repair as needed.

18.Disconnect scan tool MB991958.

SYMPTOM

PROBABLE CAUSE

REMEDY

• Fuel pressure too low

• Fuel pressure drops after 

revving

Clogged fuel filter

Replace fuel filter

Fuel leaking to return side due to 
poor fuel regulator valve seating or 
settled spring

Replace fuel pressure regulator 
(integrated in the fuel tank pump 
module)

Low fuel pump delivery pressure

Replace fuel pump

Fuel pressure too high

Binding valve in fuel pressure 
regulator

Replace fuel pressure regulator 
(integrated in the fuel tank pump 
module)

SYMPTOM

PROBABLE CAUSE

REMEDY

Fuel pressure drops gradually after 
engine is stopped

Leaky injector

Replace injector

Leaky fuel regulator valve seat

Replace fuel pressure regulator 
(integrated in the fuel tank pump 
module)

Fuel pressure drops sharply 
immediately after engine is 
stopped

Check valve in fuel pump is held 
open

Replace fuel pump

 

 

 

 

 

 

 

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