Mitsubishi Galant 9G. Manual — part 795

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-622

STEP 12. 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.

AC305683AD

<EXCEPT VEHICLES FOR CALIFORNIA
EMISSION REGULATION>

AC307255AC

<VEHICLES FOR CALIFORNIA EMISSION
REGULATION>

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-623

(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 (sub) or leveling valve.> :

Reassemble the leaked parts and check again that
there are no leaks. Then reinstall the fuel tank (Refer
to GROUP 13C, Fuel Tank

P.13C-10

). Then go to

Step 15 .

YES <When there is a leak from the fuel tank.> : Replace

the fuel tank (Refer to GROUP 13C, Fuel Tank

P.13C-10

). Go to Step 15.

NO : When there is no leak, reinstall the fuel tank (Refer to

GROUP 13C, Fuel Tank

P.13C-10

). Then go to Step

14.

AC305684

FUEL FILLER
HOSE

AD

<EXCEPT VEHICLES FOR CALIFORNIA
EMISSION REGULATION>

AC307256AB

<VEHICLES FOR CALIFORNIA EMISSION
REGULATION>

FUEL FILLER
HOSE

AC305684AE

<EXCEPT VEHICLES FOR CALIFORNIA
EMISSION REGULATION>

AC307256AC

<VEHICLES FOR CALIFORNIA EMISSION
REGULATION>

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-624

STEP 13. Check the evaporative emission canister for
vacuum leaks.
(1) Remove the evaporative emission canister (Refer to

GROUP 17, Evaporative Emission Canister and Fuel Tank
Pressure Relief Valve

P.17-95

).

(2) Connect a hand vacuum pump to the evaporative emission

canister and plug the other nipples.

(3) Apply a pressure on the hand vacuum pump, and confirm

that air is maintained.

(4) Disconnect the hand vacuum pump and remove the plugs,

and then install the evaporative emission canister (Refer to
GROUP 17, Evaporative Emission Canister and Fuel Tank
Pressure Relief Valve

P.17-95

).

Q: Is the evaporative emission canister in good condition?

YES : Go to Step 14.
NO : Replace the evaporative emission canister (Refer to

GROUP 17, Evaporative Emission Canister and Fuel
Tank Pressure Relief Valve

P.17-95

). Then go to Step

15 .

AC305682

AB

PLUGS

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-625

STEP 14. Using scan tool MB991958, check the
evaporative emission system monitor test.

CAUTION

• To prevent damage to scan tool MB991958, always turn

the ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991958.

• During this test, the PCM automatically increases the

engine speed to 1,600 r/min or greater. Check that the
transaxle is set to the "P" position.

(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Erase the DTCs using scan tool MB991958.
(4) Check that the fuel cap is securely closed (Tighten until

three clicks are heard).

(5) Start the engine.
(6) Select "System Test."
(7) Select "Evap Leak Mon."
(8) During the test, keep the accelerator pedal at the idle

position.

(9) Keep the engine speed and engine load within the specified

range. When the monitor test starts, the "In Progress" item
on scan tool MB991958 will change from "NO" to "YES."

(10)Turn the ignition switch to the "LOCK" (OFF) position.

Disconnect scan tool MB991958.

Q: Is "Evap Leak Mon. Completed. Test Failed and DTCs

Set" displayed on scan tool MB991958?
YES : Replace the PCM (Refer to

P.13A-1140

). Then go to

Step 15 .

NO <"Evap Leak Mon. Completed. Test Passed" is
displayed on scan tool MB991958.> : The evaporative

emission system is working properly at this time. Go
to Step 15 .

NO <"Evap Leak Mon. Discontinued. Retest again from
the first" is displayed on scan tool MB991958.> : The

EVAP monitor has been interrupted during the test.
Turn the ignition switch to the "LOCK" (OFF) position
once, and repeat the monitoring from Step 14.

STEP 15. Perform the OBD-II drive cycle.
(1) Confirm the repair by performing the appropriate drive cycle

(Refer to Diagnostic Function

− OBD-ll Drive Cycle −

Procedure 1

− Evaporative Emission System Leak Monitor

P.13A-6

).

(2) Read the DTC.
Q: Is DTC P0442 set?

YES : Repeat the troubleshooting from Step 1.
NO : The procedure is complete.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827