Mitsubishi Lancer Evolution X. Manual — part 356
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-489
STEP 5. Check for leaks in evaporative emission hoses C
and D.
Use a hand vacuum pump to test each hose C and D.
Q: Do the hoses hold vacuum?
YES : Go to Step 6 .
NO : Replace any damaged hose. Then go to Step 14 .
STEP 6. Using scan tool MB991958, check actuator test
item 15: Evaporative emission ventilation solenoid.
(1) Remove the canister cover.
(2) Remove the evaporative emission ventilation solenoid. Do
not disconnect the connector.
(3) Connect the hose of the hand vacuum pump to the canister
side nipple of the evaporative emission ventilation solenoid.
(4) Turn the ignition switch to the "ON" position.
(5) Set scan tool MB991958 to actuator test mode.
• Item 15: Evaporative Emission Ventilation Solenoid.
• While the evaporative emission ventilation solenoid
is energized, operate the hand vacuum pump and
confirm that the solenoid holds vacuum.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
(7) Disconnect the hand vacuum pump, and reinstall the
evaporative emission ventilation solenoid.
(8) Reinstall the canister cover.
Q: Did the evaporative emission ventilation solenoid hold
vacuum?
YES : Go to Step 7 .
NO : Replace the evaporative emission ventilation
solenoid. Then go to Step 14 .
AK704689
Hose C
AB
AK704690 AB
Hose D
AK704699 AB
Evaporative emission
ventilation solenoid
Canister
side nipple
Evaporative emission
ventilation solenoid
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-490
STEP 7. Perform the pressure test on the evaporative
emission system.
(1) Disconnect hose E from the canister while holding the
release buttons indicated in the illustration pressed by
fingers.
(2) Plug the disconnected end of hose E.
(3) Confirm that the evaporative emission system pressure
pump (Miller number 6872A) is operating properly. Perform
the self-test as described in the pump manufacturer's
instructions.
(4) Remove the fuel cap.
(5) Connect the evaporative emission system pressure pump
(Miller number 6872A) to the fuel tank filler tube by using
fuel tank adapter (MLR-8382).
(6) Pressure test the system to determine whether any leaks
are present.
NOTE: The "Pressure test" in this procedure refers to the
I/M240 Simulation Test. The eight steps of this test are
described in the manufacturer's instructions for the evapo-
rative emission system pressure pump, Miller number
6872A.
(7) Remove the evaporative emission system pressure pump
(Miller number 6872A) and the fuel tank adapter
(MLR-8382), and reinstall the fuel cap.
(8) Connect hose E to the evaporative emission canister.
Q: Is the evaporative emission system line free of leaks?
YES : Go to Step 12 .
NO : Go to Step 8 .
AK704691
AB
Hose E
AK704692 AB
Plug
Hose E
AK704700
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-491
STEP 8. Check for leaks in evaporative emission hoses E
and F.
Use a hand vacuum pump to test each hose E and F.
Q: Do the hoses hold vacuum?
YES : Go to Step 9 .
NO : Replace any damaged hose. Then go to Step 14 .
STEP 9. Check for leaks in evaporative emission hoses G
and H.
(1) Remove the fuel tank assembly.
(2) Use a hand vacuum pump to test each hose G and H.
Q: Do the hoses hold vacuum?
YES : Go to Step 10.
NO : Replace any damaged hose and reinstall the fuel tank
assembly. Then go to Step 14 .
STEP 10. Check for leaks in evaporative emission hoses I
and J.
(1) Remove the fuel tank assembly.
(2) Use a hand vacuum pump to test each hose I and J.
Q: Do the hoses hold vacuum?
YES : Go to Step 11 .
NO : Replace any damaged hose and reinstall the fuel tank
assembly. Then go to Step 14 .
AK704693AB
Hose E
AK704694
AB
Hose F
AK704696
Hose G
Hose H
AB
AK704697
Hose J
Hose I
AC
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-492
STEP 11. Check for leaks in the fuel tank.
(1) Visually check for cracks or other leaks in the fuel tank.
NOTE: Carefully check the fuel pump module and the fuel
tank differential pressure sensor installation in the fuel tank.
(2) Connect the evaporative emission system pressure pump
(Miller number 6872A) to the fuel filler hose.
(3) Plug the hose and the nipple shown in the illustration.
NOTE: If these items are not securely plugged now, the fuel
could leak in the next step.
(4) Pressurize the fuel tank with the evaporative emission
system pressure pump.
(5) In the pressurized state, check for leaks by applying a
soapy water solution to each section and look for bubbles.
Q: Are any leaks found?
YES <When there is a leak from the attachment points of
the fuel pump module, fuel tank differential pressure
sensor, fuel level sensor or leveling valve.> :
Reassemble the leaked parts and check again that
there are no leaks. Then reinstall the fuel tank. Then
go to Step 14 .
YES <When there is a leak from the fuel tank.> : Replace
the fuel tank. Then go to Step 14 .
NO : When there is no leak, reinstall the fuel tank. Then go
to Step 13 .
AK704698
AK704701
AK704701AB
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