Mitsubishi Montero Sport (2004+). Manual — part 581

13B-1

GROUP 13B

FUEL SUPPLY

CONTENTS

GENERAL DESCRIPTION. . . . . . . . .

13B-2

FUEL SUPPLY DIAGNOSIS . . . . . . .

13B-2

INTRODUCTION TO FUEL SUPPLY
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . .

13B-2

FUEL SUPPLY DIAGNOSTIC

TROUBOLESHOOTING STRATEGY. . . . .

13B-2

SYMPTOM CHART. . . . . . . . . . . . . . . . . . .

13B-2

SYMPTOM PROCEDURES . . . . . . . . . . . .

13B-3

SPECIAL TOOLS. . . . . . . . . . . . . . . .

13B-5

FUEL TANK . . . . . . . . . . . . . . . . . . . .

13B-6

REMOVAL AND INSTALLATION . . . . . . . .

13B-6

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .

13B-7

FUEL FILTER REPLACEMENT . . . . . . . . .

13B-8

SPECIFICATIONS . . . . . . . . . . . . . . .

13B-10

FASTENER TIGHTENING
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . .

13B-10

SERVICE SPECIFICATION . . . . . . . . . . . .

13B-10

GENERAL DESCRIPTION

TSB Revision

FUEL SUPPLY

13B-2

GENERAL DESCRIPTION

M1135000100242

1. The fuel tank is located under the floor below the

rear seats.

2. A fuel cut-off valve has been adopted to prevent

fuel from leaking out in the event of a collision.

FUEL SUPPLY DIAGNOSIS

INTRODUCTION TO FUEL SUPPLY DIAGNOSIS

M1135004000300

The fuel supply device is used to supply an appropri-
ate mixture to the engine. The device is configured of
the fuel tank, fuel filter, fuel pump and the fuel pipe
that couples each part. An evaporative emission con-
trol system is also provided to prevent pollution from
the evaporated fuel.

Engine malfunctions caused by insufficient fuel sup-
ply and evaporative emission control system opera-
tion malfunctions can be caused by faults in the
vapor line, fuel pipe, hose, or fuel tank pressure con-
trol valve, etc.

FUEL SUPPLY DIAGNOSTIC TROUBOLESHOOTING STRATEGY

M1135004100211

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find a
fuel supply fault.
1. Gather information from the customer.

2. Verify that the condition described by the

customer exists.

3. Find the malfunction by following the Symptom

Chart.

4. Verify that the malfunction is eliminated.

SYMPTOM CHART

M1135004200304

AC004966

FUEL PRESSURE
REGURATOR

FUEL CUT-OFF VALVE

FUEL FILTER

AB

SYMPTOM

INSPECTION PROCEDURE REFERENCE PAGE

Engine malfunctions due to insufficient fuel supply

1

P.13B-3

FUEL SUPPLY DIAGNOSIS

TSB Revision

FUEL SUPPLY

13B-3

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1:Engine Malfunctions Due to Insufficient Fuel Supply

.

TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES
FOR THIS CASE:)

• Injector failed.

• Open or shorted injector circuit, or loose connector.

• Bent, kinked or clogged fuel pipe or hose.

• Malfunction of fuel pump module.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

STEP 1. Using scan tool MB991958, read the diagnostic
trouble code (DTC).

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 MB991911 to special tool MB991824.
(5) Connect special tool MB991911 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 MUT-III system on the personal computer.
(8) Turn the ignition switch to the "ON" position.
(9) Select "Interactive Diagnosis" from the start-up screen.
(10)Select "System select."
(11)Choose "MFI" from the "POWER TRAIN" tab.
(12)Select "MITSUBISHI."
(13)Select "Diagnostic Trouble Code."
(14)If a DTC is set, it is shown.
Q: Is the DTC set?

YES : Refer to GROUP 13A, Diagnostic Trouble Code Chart

P.13A-26

.

NO : Go to Step 2.

AK303629AB

MB991911

MB991827

MB991824

16-PIN

FUEL SUPPLY DIAGNOSIS

TSB Revision

FUEL SUPPLY

13B-4

STEP 2. Check the fuel pressure.
Refer to GROUP 13A, On-vehicle Service

− Fuel Pressure Test

P.13A-884

.

Q: Is the fuel pressure in good condition?

YES : Go to Step 6.
NO : Repair or replace. Then go to Step 3.

STEP 3. Check for bending, twisting or clogging of the fuel
pipe or hose.
Q: Are the fuel pipe and hose in good condition?

YES : Go to Step 4.
NO : Repair or replace. Then go to Step 7.

STEP 4. Check the fuel filter operation.
Q: Is the fuel filter operation in good condition?

YES : Then go to Step 5.
NO : Replace (Refer to

P.13B-8

). Then go to Step 7.

STEP 5. Check the fuel pump assembly operation.

Refer to GROUP 13A, On-vehicle Service

− Fuel Pump Opera-

tion Check

P.13A-888

.

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

YES : Then go to Step 6.
NO : Replace. Then go to Step 7.

STEP 6. Check the inside of the fuel tank for contamination
and rust.
(1) Draining fuel.

(2) Fuel tank removal (Refer to

P.13B-6

).

Q: Is the fuel tank in good condition?

YES : Go to Step 7.
NO : Replace the fuel filter, and clean the fuel tank and fuel

line. Then go to Step 7.

STEP 7. Retest the system.
Q: Is the engine malfunction eliminated?

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