Mitsubishi Galant (2004+). Manual — part 976
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-721
STEP 13. Check for clogging in evaporative emission
system hoses I through K.
(1) Remove the fuel tank filler tube protector (Refer to GROUP
13C, Fuel Tank
(2) Use a hand vacuum pump on each hose from hoses I to K.
Q: Are the hoses in good condition?
YES : Go to Step 14.
NO : Replace the damaged hose, and the fuel tank filler
tube protector (Refer to GROUP 13C, Fuel Tank
). Then go to Step 19.
STEP 14. Test check valve.
(1) Check valve is a one-way check valve.
(2) Check valve should allow air to flow in only one direction.
Q: Does check valve allow air to pass in one direction
only?
YES : Go to Step 15.
NO : Replace check valve, and reinstall the fuel tank filler
tube protector (Refer to GROUP 13C, Fuel Tank
). Then go to Step 19.
AC306401
HOSE I
AC
AC306800
AB
HOSE J
HOSE K
AC306800
AD
CHECK VALVE
AC306332
AB
CHECK VALVE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-722
STEP 15. Check for clogging in evaporative emission
hoses L and M.
Use a hand vacuum pump to test each hose L and M.
Q: Are the hoses in good condition?
YES : Go to Step 16.
NO : Replace any damaged hose. Then go to Step 19.
STEP 16. Check the evaporative emission canister for
leaks and clogging.
(1) Remove the evaporative emission canister (Refer to
GROUP 17, Evaporative Emission Canister and Fuel Tank
Pressure Relief Valve
(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) When the plugs are removed, check for air leakage.
(5) Disconnect the hand vacuum pump and install the
evaporative emission canister (Refer to GROUP 17,
Evaporative Emission Canister and Fuel Tank Pressure
Relief Valve
Q: Is the evaporative emission canister in good condition?
YES : Go to Step 17.
NO : Replace the evaporative emission canister (Refer to
GROUP 17, Evaporative Emission Canister and Fuel
Tank Pressure Relief Valve
). Then go to Step
19 .
AC306776
AB
HOSE M
HOSE L
<EXCEPT VEHICLES FOR CALIFORNIA
EMISSION REGULATION>
AC306776
AC307258AB
HOSE M
HOSE L
<VEHICLES FOR CALIFORNIA EMISSION
REGULATION>
AC305682
AB
PLUGS
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-723
STEP 17. Check for clogging in evaporative emission hose
N.
(1) Remove the fuel tank assembly (Refer to GROUP 13C,
Fuel Tank
(2) Use the hand vacuum pump to check the hose N.
Q: Is the hose in good condition?
YES : Reinstall the fuel tank assembly (Refer to GROUP
13C, Fuel Tank
). Then go to Step 18.
NO : Replace any damaged hose and reinstall the fuel tank
assembly (Refer to GROUP 13C, Fuel Tank
). Then go to Step 19.
AC305683AB
HOSE N
<EXCEPT VEHICLES FOR CALIFORNIA
EMISSION REGULATION>
AC307255AB
HOSE N
<VEHICLES FOR CALIFORNIA EMISSION
REGULATION>
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-724
STEP 18. 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
). Then go to
Step 19 .
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 19 .
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 18.
STEP 19. 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
).
(2) Read the DTC.
Q: Is DTC P0455 set?
YES : Repeat the troubleshooting from Step 1.
NO : The procedure is complete.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
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