Mitsubishi Eclipse. Manual — part 645
13C-1
CONTENTS
GENERAL DESCRIPTION. . . . . . . . .
FUEL SUPPLY DIAGNOSIS . . . . . . .
INTRODUCTION TO FUEL SUPPLY
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING STRATEGY . . . . . .
SYMPTOM CHART. . . . . . . . . . . . . . . . . . .
SYMPTOM PROCEDURES . . . . . . . . . . . .
SPECIAL TOOLS. . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE . . . . . . . . . . .
FUEL PUMP MODULE REPLACEMENT . .
FUEL TANK . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
DISASSEMBLY AND ASSEMBLY . . . . . . .
INSPECTION . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS . . . . . . . . . . . . . . .
FASTENER TIGHTENING
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . .
GENERAL DESCRIPTION
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FUEL SUPPLY
13C-2
GENERAL DESCRIPTION
M1135000100361
• The fuel tank is located under the floor of the rear
seats to provide increased safety and a wider lug-
gage space.
• A plastic fuel tank has been adopted to reduce
weight, and improve anti-corrosion effectiveness.
• A fuel pump module, which unifies fuel pump, fuel
filter, reservoir cup and fuel level sensor, has
been adopted to lighten weight and improve ser-
viceability.
AC004652 AC
<4G6>
FUEL PRESSURE
REGULATOR
FUEL INJECTOR
FUEL PUMP MODULE
FUEL TANK
EVAPORATIVE EMISSION
CANISTER
AC004653 AC
<6G7>
FUEL PRESSURE
REGULATOR
FUEL INJECTOR
FUEL PUMP MODULE
FUEL TANK
EVAPORATIVE EMISSION
CANISTER
FUEL SUPPLY DIAGNOSIS
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FUEL SUPPLY
13C-3
FUEL SUPPLY DIAGNOSIS
INTRODUCTION TO FUEL SUPPLY DIAGNOSIS
M1135004000355
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 sys-
tem 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.
TROUBLESHOOTING STRATEGY
M1135004100244
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 malfunction is eliminated.
SYMPTOM CHART
M1135004200263
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
• MB991637: Fuel Pressure Gauge Set
• MD998709: Adaptor Hose
• MD998742: Hose Adaptor
SYMPTOM
INSPECTION PROCEDURE
REFERENCE PAGE
Engine malfunctions due to insufficient fuel supply 1
FUEL SUPPLY DIAGNOSIS
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FUEL SUPPLY
13C-4
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) When scan tool MB991958 is used, connect it as described
below.
a. Start up the personal computer.
b. Connect special tool MB991827 to special tool
MB991824 and the personal computer.
c. Connect special tool MB991911 to special tool
MB991824.
d. Connect special tool MB991911 to the data link
connector.
e. 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 illumi-
nated in a green color.
f. Start the MUT-III system on the personal computer.
(3) Turn the ignition switch to the "ON" position.
(4) Check for MFI system diagnostic trouble code. (Refer to
GROUP 13A, Diagnostic Trouble Code Chart
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is any DTC set?
YES : Remove scan tool MB991958 in a reverse of the
installation procedure. Refer to GROUP 13A,
Diagnostic Trouble Code Chart
.
NO : Go to Step 2.
AC303127
AB
MB991911
16-PIN
MB991827
MB991824
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