Mitsubishi 380. Manual - part 765

SPECIFICATIONS

ENGINE LUBRICATION

12-8

13B-1

GROUP 13B

FUEL SUPPLY

CONTENTS

GENERAL DESCRIPTION. . . . . . . . .

13B-2

FUEL SUPPLY DIAGNOSIS . . . . . . .

13B-2

INTRODUCTION. . . . . . . . . . . . . . . . . . . . . 

13B-2

TROUBLESHOOTING STRATEGY . . . . . . 

13B-2

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

13B-2

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

13B-3

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

13B-5

ON-VEHICLE SERVICE. . . . . . . . . . .

13B-6

FUEL LEVEL SENSOR CHECK . . . . . . . . . 

13B-6

FUEL LEVEL SENSOR (SUB) REMOVAL . 

13B-12

FUEL PUMP OPERATION CHECK  . . . . . . 

13B-6

FUEL PUMP MODULE REPLACEMENT . . 

13B-6

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

13B-8

REMOVAL AND INSTALLATION  . . . . . . . . 

13B-8

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

13B-14

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

13B-15

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

13B-15

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

13B-15

HOME

GENERAL DESCRIPTION

FUEL SUPPLY

13B-2

GENERAL DESCRIPTION

M1135000100435

• The fuel tank is located under the floor below the 

rear seats.

• A fuel cut-off valve is utilized to prevent fuel from 

leaking out in the event of a collision.

• A fuel pump module, including fuel pump, fuel fil-

ter, reservoir and fuel level sensor, is used to 
lighten weight and improve serviceability.

CONSTRUCTION DIAGRAM

FUEL SUPPLY DIAGNOSIS

INTRODUCTION

M1135004000388

The fuel system is used to supply an appropriate fuel 
mixture to the engine. The system consists of the 
fuel tank, fuel filter, fuel pump and fuel pipes. An 
evaporative emission system is provided to prevent 
evaporated fuel from escaping into the atmosphere.

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

TROUBLESHOOTING STRATEGY

M1135004100277

Use these steps to plan your diagnostic strategy. If 
you follow them carefully, you will be sure to find 
most of the fuel supply faults.
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 malfunction is eliminated.

SYMPTOM CHART

M1135004200382

03DB142A

FUEL INJECTOR

FUEL RAIL

FUEL PIPE 

FUEL PUMP MODULE

FUEL LEVEL SENSOR (SUB)

FUEL TANK

CANISTER ASSY

SYMPTOM

INSPECTION PROCEDURE

REFERENCE PAGE

Engine Malfunctions Due to Insufficient Fuel Supply

1

P.13B-3

FUEL SUPPLY DIAGNOSIS

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, twisted or clogged fuel pipe or hose.

• Malfunction of the fuel pump module.

DIAGNOSIS

Required Special Tools:

• : Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

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

CAUTION

To prevent damage to diagnostic tool, always turn the igni-
tion switch to the "LOCK" (OFF) position before connect-
ing or disconnecting diagnostic tool.
(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 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 Diagnostic Trouble Code Chart. 

P.13A-17

 .

NO :  Turn the ignition switch to the "LOCK" (OFF) position, 

and then remove diagnostic tool in the reverse order 
of installation. Go to Step 2.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827