Mitsubishi Montero Sport (2004+). Manual — part 301

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-617

STEP 14. Using scan tool MB991958, check 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
transmission is set to "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" and press the "YES" key.
(7) Select "Evap Leak Mon" and press the "YES" key.
(8) During this test, keep the accelerator pedal at the idling

position.
NOTE: If the engine speed does not reach 2,000 r/min dur-
ing the monitor test, adjust the Speed Adjusting Screw
(Refer to

P.13A-883

), and adjust to the standard value.

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

Set" displayed on scan tool MB991958?
YES : Replace the PCM. 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. Then
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 monitor test.

AK303629AB

MB991911

MB991827

MB991824

16-PIN

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-618

STEP 15. Pressure test for clogging in evaporative
emission system line between hose E and L.
(1) Disconnect hose E from the canister side, and plug the

hose.

(2) Remove the fuel cap.
(3) Confirm that the evaporative emission system pressure

pump (Miller number 6872A) is operating properly. Perform
the self-test as described in the manufacturer's instructions.

(4) Connect the evaporative emission system pressure pump

to the fuel filler neck.

(5) 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.

(6) After it is confirmed that pressure maintained, unplug hose

E.

(7) Disconnect the evaporative emission system pressure

pump, 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 18 .
NO : Go to Step 16 .

STEP 16. Check for clogging in the evaporative emission
system line hose E.
Perform a leakage test with a hand vacuum pump on hose E.
Q: Does the air should pass through the hose I?

YES : Go to Step 17 .
NO : Replace the damaged hose. Then go to Step 19 .

AC005140

HOSE E

AC

ACX01358

AC005141

AC004932

HOSE E

AH

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-619

STEP 17. Check for clogging in the evaporator line from
hoses F.
(1) Remove the fuel filler neck protector. (Refer to GROUP

13B, Fuel Tank

P.13B-6

).

(2) Perform a leakage test with a hand vacuum pump on hose

E.

Q: Are the hoses in good condition?

YES : Go to Step 19 .
NO : Replace the damaged hose and reinstall the fuel filler

neck protector. (Refer to GROUP 13B, Fuel Tank

P.13B-6

). Then go to Step 19 .

STEP 18. 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.17-116

).

(2) Connect a hand vacuum pump to the canister instead of

hose, and plug the other nipples.

(3) Apply vacuum with the hand vacuum pump and confirm that

the canister holds vacuum.

Q: Does the evaporative emission canister hold vacuum?

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.17-116

). Then go to

Step 19 .

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-4

).

(2) Read the DTC.
Q: Is DTC P0455 set?

YES : Return to Step 1 .
NO : The procedure is complete.

AC004933AD

HOSE I

HOSE G

HOSE H

HOSE J

HOSE F

AC004931

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-620

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

.

AC005137

AB

A

Q

O

N

P

B

C

M*

M*

E

A

D

M

E

L

K

F

G

I

H

FUEL TANK

EVAPORATIVE
EMISSION
CANISTER

EVAPORATIVE
EMISSION
PURGE SOLENOID

EVAPORATIVE
EMISSION
VENTILATION
SOLENOID

CHECK VALVE A

CHECK VALVE B

INTAKE MANIFOLD

SYSTEM DIAGRAM

J

VENT VALVE MODULE

NOTE
*: Manifold port

FUEL TANK DIFFERENTIAL
PRESSURE SENSOR

ACX01347AB

EVAPORATIVE EMISSION
PURGE SOLENOID

AC004938AB

EVAPORATIVE EMISSION
VENTILATION SOLENOID

AC005146

EVAPORATIVE EMISSION CANISTER

AB