Mitsubishi Eclipse. Manual - part 647

FUEL SUPPLY DIAGNOSIS

TSB Revision

FUEL SUPPLY

13C-9

STEP 5. Check the inside of the fuel tank for contamination 
and rust.
(1) Draining fuel.
(2) Fuel tank removal. (Refer to 

P.13C-13

.)

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. Check symptoms.
Q: Is the engine malfunction eliminated?

YES : Finish.
NO :  Return to Step 1.

SPECIAL TOOLS

TSB Revision

FUEL SUPPLY

13C-10

SPECIAL TOOLS

M1135000600258

TOOL

TOOL NUMBER AND 
NAME

SUPERSESSION

APPLICATION

MB991958

A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991914
F: MB991825
G: MB991826

MUT-III Sub Assembly

A: Vehicle 

Communication 
Interface

B: MUT-III USB Cable
C: MUT-III Main Harness 

A (Vehicles with CAN 
communication 
system)

D: MUT-III Main Harness 

B (Vehicles without 
CAN communication 
system)

E: MUT-III Main Harness 

C (for Daimler Chrysler 
models only)

F: MUT-III Adapter 

Harness

G: MUT-III Trigger 

Harness

• Reading diagnostic 

trouble code

• MFI system inspection

MD998709
Adaptor hose

MIT210196

Measurement of fuel 
pressure

MB991910

MB991826

MB991958

MB991911

MB991914

MB991824

MB991827

MB991825

DO NOT USE

A

B

C

D

E

F

G

DO NOT USE

ON-VEHICLE SERVICE

TSB Revision

FUEL SUPPLY

13C-11

ON-VEHICLE SERVICE

FUEL PUMP MODULE REPLACEMENT

M1135004900262

1. Remove the rear seat cushion. (Refer to GROUP 52A 

− 

Rear Seat 

P.52A-19

.)

2. Remove the protector.
3. Bleed the residual pressure from inside the fuel pipe line to 

prevent the fuel from spraying out. [Refer to GROUP 13A 
<2.4L> 

P.13A-932

, 13B <3.0L> 

P.13B-1109

 

− On-vehicle 

Service 

− Fuel Pump Connector Disconnection (How to 

Reduce Pressurized Fuel Line.)]

MD998742
Hose adaptor

MD998742-01

MB991637
Fuel pressure gauge set

Tool not available

MB991480 
Tank cap wrench

−

Cap removal and 
installation

MB991348
Test harness set

−

Fuel tank differential 
pressure sensor check

TOOL

TOOL NUMBER AND 
NAME

SUPERSESSION

APPLICATION

MB991637

MB991480

MB991348

AC000705AB

PROTECTOR

ON-VEHICLE SERVICE

TSB Revision

FUEL SUPPLY

13C-12

4. Disconnect the hose and connector connections, and then 

use special tool MB991480 to remove the fuel pump 
module.

CAUTION

Install the packing to the fuel tank, and then install the fuel 
pump module to the fuel tank. Installing the packing to the 
fuel pump module will damage the packing lip when 
installing the fuel pump module to the fuel tank, and fuel 
leakage will occur. 
5. Check that the fuel tank is not damaged or deformed, and 

then securely install the packing to the fuel tank.
NOTE: If the packing is damaged or deformed, replace with 
new packing.

CAUTION

• Do not tilt the fuel pump module when installing.
• The packing should not be folded over as shown by "A" 

in the illustration.

6. Apply soap water to the inside of the packing, and then 

install the fuel pump module.

CAUTION

When Tightening, be careful not to let the fuel pump mod-
ule turn together with the cap. If the mating marks are mis-
aligned, the float may measure a remaining amount of fuel 
in correctly, causing the low fuel warning light to malfunc-
tion.
7. Use special tool MB991480 to align the mating marks on the 

fuel tank and fuel pump module, and tighten the cap.

8. Check for leaks from the installation section of the fuel pump 

module by the following procedure.

(1) Apply soapy water to the inside diameter of the cap.
(2) Choke the vapor hose and main hose, apply an internal 

pressure of 10 kPa (1.45 psi) or less from the return hose 
and check that no bubbles form in the soapy water.

9. Connect the connector, and then install the protector.
10.Install the rear seat cushion. (Refer to GROUP 52A 

− Rear 

Seat 

P.52A-19

.)

AC000701AB

MB991480

AC000702AB

OK

A

(INCORRECT)

PACKING

AC000703

MB991480

MATING MARKS

AB