Mitsubishi Galant 9G. Manual — part 826

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-746

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

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) 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

P.17-95

).

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

P.17-95

). 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-747

STEP 17. Check for clogging in evaporative emission hose
N.
(1) Remove the fuel tank assembly (Refer to GROUP 13C,

Fuel Tank

P.13C-10

).

(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

P.13C-10

). Then go to Step 18.

NO : Replace any damaged hose and reinstall the fuel tank

assembly (Refer to GROUP 13C, Fuel Tank

P.13C-10

). 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-748

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

P.13A-1140

). 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

P.13A-6

).

(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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-749

DTC P0456: Evaporative Emission System Leak Detected (Very Small Leak)

.

AC306277

A

B

C

D

E

F

G

H

P

Q

R

O

N

M

I

J

K

L

AB

INTAKE MANIFOLD

FUEL TANK

EVAPORATIVE EMISSION
VENTILATION SOLENOID

CHECK VALVE

EVAPORATIVE EMISSION
PURGE SOLENOID

EVAPORATIVE
EMISSION CANISTER

ONBOARD REFUELING
VAPOR RECOVERY(ORVR)
VENT VALVE MODULE

SYSTEM DIAGRAM

CHAMBER

AC306400

AB

EVAPORATIVE EMISSION CANISTER

AC305066AC

EVAPORATIVE EMISSION
PURGE SOLENOID

INTAKE
MANIFOLD

AC305053AC

EVAPORATIVE EMISSION
VENTILATION SOLENOID