Mitsubishi Outlander GS45X. Manual — part 902

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-541

STEP 8. Check for leaks in evaporative emission hose F
and G.
(1) Remove the fuel tank assembly (Refer to GROUP 13C,

Fuel Tank <FWD>

P.13C-15

or Fuel Tank <AWD>

P.13C-15

).

(2) Use a hand vacuum pump to test each hose F and G.
Q: Do the hose hold vacuum?

YES : Go to Step 9 .
NO : Replace any damaged hose. Then go to Step 12 .

STEP 9. 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.

AK704167

Hose F

Hose G

AC

AK704168

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-542

(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.> :

Repair or replace the leaked parts and check again
that there are no leaks. Then reinstall the fuel tank
(Refer to GROUP 13C, Fuel Tank <FWD>

P.13C-15

or Fuel Tank <AWD>

P.13C-20

). Then go to Step 12 .

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

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

P.13C-15

or Fuel Tank <AWD>

P.13C-20

).

Go to Step 12

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

GROUP 13C, Fuel Tank <FWD>

P.13C-15

or Fuel

Tank <AWD>

P.13C-20

). Then go to Step 11 .

STEP 10. Check the evaporative emission canister for
vacuum leaks.
(1) Connect a hand vacuum pump to the evaporative emission

canister and plug the other nipples.

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

that air is maintained.

(3) Disconnect the hand vacuum pump and remove the plugs.
Q: Is the evaporative emission canister in good condition?

YES : Go to Step 11 .
NO : Replace the evaporative emission canister (Refer to

GROUP 17, Evaporative emission canister and fuel
tank pressure relief valve removal and installation

P.17-87

). Then go to Step 12 .

AK704169

AK704170AC

AK704171

Plugs

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-543

STEP 11. Using scan tool MB991958, check the
evaporative emission system monitor test.

CAUTION

• During this test, the ECM automatically increases the

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

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

three clicks are heard).

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

position.

(8) 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".

(9) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is "Evap Leak was detected." displayed on scan tool

MB991958?
YES : Replace the ECM. When the ECM is replaced,

register the ID code. Refer to GROUP 42B, Diagnosis
− ID Code Registration Judgment Table <Vehicles

with KOS>

P.42B-15

or GROUP 42C, Diagnosis

− ID

Code Registration Judgment Table <Vehicles with
WCM>

P.42C-10

. Then go to Step 12 .

NO <"Evap Leak Monitor test passed" is displayed on
scan tool MB991958.> : The evaporative emission system

is working properly at this time. Go to Step 12 .

NO <"Evap Leak Monitor discontinued. Once turn the IG
off then retest again from the beginning." 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 11 .

STEP 12. Perform the OBD-II drive cycle.
(1) Confirm the repair by performing the appropriate drive cycle

(Refer to Diagnostic Function

− OBD-ll Drive Cycle −

Pattern 5

P.13B-11

).

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

YES : Repeat the troubleshooting.
NO : The procedure is complete.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-544

DTC P0456: Evaporative Emission Control System Leak Detected (very small leak)

.

AK901211

AB

I

A

C

E

D

F

G

H

Air filter

B

System diagram

Intake manifold

Evaporative emission
purge solenoid

Fuel tank

Evaporative
emission canister

Fuel tank differential
pressure sensor

Vent pipe

Evaporative emission
ventilation solenoid

AK704181AB

Evaporative emission canister

AK700418

AC

Evaporative emission
ventilation solenoid

Spare tire

D-116 (B)

Connector: D-116

AK900408AC

Evaporative emission purge solenoid