Mitsubishi Outlander GS45X. Manual - part 513

FUEL SUPPLY DIAGNOSIS

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FUEL SUPPLY

13C-7

STEP 1. Using scan tool MB991958, read the MFI system
diagnostic trouble code.

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.
(1) Ensure that the ignition switch is at the "LOCK" (OFF)

position.

(2) Start up the personal computer.
(3) Connect special tool MB991827 to special tool MB991824

and the personal computer.

(4) Connect special tool MB991910 to special tool MB991824.
(5) Connect special tool MB991910 to the data link connector.
(6) Turn the power switch of special tool MB991824 to the "ON"

position.
NOTE: When special tool MB991824 is energized, special
tool MB991824 indicator light will be illuminated in a green
color.

(7) Start the M.U.T.-III system on the personal computer.
(8) Turn the ignition switch to the "ON" position.
(9) Check for MFI system diagnostic trouble code (Refer to

GROUP 13A, Diagnostic Function

− How to Read and

Erase Diagnostic Trouble Codes

P.13A-11

) <2.4L engine>,

(Refer to GROUP 13B, Diagnostic Function

− How to Read

and Erase Diagnostic Trouble Codes

P.13B-11

) <3.0L

engine>.

(10)Turn the ignition switch to the "LOCK" (OFF) position, and

then remove scan tool MB991958 in the reverse order of
installation.

Q: Is the DTC set?

YES : Repair MFI system (Refer to GROUP 13A, Diagnostic

Trouble Code Chart

P.13A-49

) <2.4L engine>,

(GROUP 13B, Diagnostic Trouble Code Chart

P.13B-50

) <3.0L engine>. Then go to Step 6.

NO : Go to Step 2.

STEP 2. Check the fuel pressure.
Release residual pressure from the fuel line to prevent fuel
spray (Refer to GROUP 13A, On-vehicle Service

− Fuel Pres-

sure Test

P.13A-868

Q: Is the fuel pressure in good condition?

YES : Go to Step 5.
NO : Go to Step 3.

ZC501967

AC404789

AC703461AB

MB991824

MB991827

MB991910

Data link

connector

ON-VEHICLE SERVICE

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FUEL SUPPLY

13C-8

STEP 3. Check for bending, twisting or clogging of the fuel
main pipe and fuel high-pressure hose.
Q: Are the fuel main pipe and fuel high-pressure hose in

good condition?
YES : Go to Step 4.
NO : Repair or replace the fuel main pipe or fuel

high-pressure hose. Then go to Step 6.

STEP 4. Check the fuel pump module operation.
Refer to GROUP 13A, On-vehicle Service

− Fuel Pump Opera-

tion Check

P.13A-867

Q: Is the fuel pump module operation in good condition?

YES : Go to Step 5.
NO : Replace the fuel pump module (Refer to

) <AWD>. Then go to

Step 6.

STEP 5. Check the inside of the fuel tank for contamination
and rust.
(1) Drain fuel.
(2) Remove the fuel tank (Refer to

P.13C-15

) <FWD>, (Refer

P.13C-20

) <AWD>.

Q: Is the fuel tank in good condition?

YES : Go to Step 6.
NO : Replace the fuel filter, and clean the fuel tank and fuel

line. Then go to Step 6.

STEP 6. Retest the system.
Q: Is the engine malfunction eliminated?

YES : The procedure is complete.
NO : Return to Step 1.

ON-VEHICLE SERVICE

FUEL PUMP OPERATION CHECK

M1135001000602

Refer to GROUP 13A, On-vehicle Service

− Fuel Pump Opera-

tion Check

P.13A-867

FUEL LEVEL SENSOR CHECK

M1135005300111

Refer to GROUP 54A, Combination Meter

− On-vehicle Service

− Fuel Level Sensor Check

P.54A-107

AC703477AC

Fuel main pipe

Fuel high-pressure hose

ON-VEHICLE SERVICE

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FUEL SUPPLY

13C-9

FUEL PUMP MODULE REPLACEMENT <FWD>

M1135004901102

1. Remove the second seat assembly (Refer to GROUP 52A,

Second Seat Assembly

P.52A-25

) and turn up the floor

carpet.

2. Remove the floor inspection lid (LH).

3. Disconnect the fuel pump module connector and fuel tank

differential pressure sensor connector.

4. Release the fuel pressure in the fuel line. [Refer to GROUP

13A, On-vehicle Service - Fuel Pump Connector
Disconnection (How to Reduce Pressurized Fuel Lines)

P.13A-866

5. Insert a flat-tip screwdriver [6mm (0.24 inch) wide and 1mm

(0.04 inch) thick] into the retainer of the fuel main pipe.

6. Turn the flat-tip screwdriver about 90 degrees to push up the

retainer, and disconnect the fuel main pipe from the fuel
pump module.

AC703469 AB

Floor inspection lid (LH)

AC506219

AC703470

Fuel pump
module
connector

Fuel main pipe

Fuel tank differential
pressure sensor
connector

AC703457AB

Fuel main pipe

Retainer

Fuel pump module

Flat-tip
screwdriver

AC703458AB

Retainer

Fuel main pipe

Fuel pump module

Flat-tip screwdriver

ON-VEHICLE SERVICE

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FUEL SUPPLY

13C-10

7. Remove the mounting nuts of fuel pump module.

CAUTION

Pay attention not to damage the fuel level sensor and float
of the fuel pump module when removing the fuel pump
module from the fuel tank.
8. Remove the fuel pump module from service hole.
9. Replace the fuel pump module gasket with a new one.

CAUTION

• Pay attention not to damage the fuel level sensor and

the float of the fuel pump module when installing it to
the fuel tank.

• When installing the fuel pump module to the fuel tank,

check that the fuel level sensor moving area moves
smoothly.

10.Install the fuel pump module to the fuel tank through the

service hole, and tighten the mounting nuts to the specified
torque.

Tightening torque: 2.5

± 0.4 N⋅m (22 ± 4 in-lb)

11.Before the installation, push up the retainer of the fuel main

pipe.

12.Connect the connector of fuel main pipe to the fuel pump

module securely and push down the retainer of the
connector to lock it firmly.

13.After the installation, slightly pull the fuel main pipe to check

that it is connected securely. At this time, also check that
there is approximately 1 mm (0.04 inch) play.

14.Connect the fuel pump module connector and fuel tank

differential pressure sensor connector.

AC703471AB

Fuel pump module

AC703459AB

Fuel main pipe

Retainer

AC703460AB

Retainer

Fuel pump module

Fuel main pipe

AC506219

AC703470

Fuel pump
module
connector

Fuel main pipe

Fuel tank differential
pressure sensor
connector

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