Mitsubishi Outlander GS45X. Manual - part 664

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-479

STEP 10. 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.

(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 or leveling valve.> : Repair or 

replace the leaked parts and check again that there 
are no leaks. Then reinstall the fuel tank. Then go to 
Step 13 .

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

the fuel tank. Go to Step 13 .

NO :  When there is no leak, reinstall the fuel tank. Then go 

to Step 11 .

AK704168

AK704169

AK704170AC

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-480

STEP 11. 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 12 .
NO :  Replace the evaporative emission canister. Then go 

to Step 13 .

STEP 12. 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 Mon. Completed. Test Failed and DTCs 

Set" 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 13 .

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 13  .

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 12 .

AK704171

Plugs

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-481

STEP 13. 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.13A-11

).

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

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

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

AK901208

AB

K

A

B

C

E

G

F

H

I

J

Air filter

D

Chamber

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

AK704131

Evaporative emission
purge solenoid

Exhaust gas
recirculation
(EGR) valve

AB

Connector: B-07

B-07 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-482

.

TECHNICAL DESCRIPTION

• The ECM monitors the Evaporative Emission 

(EVAP) System pressure.

• The ECM controls the evaporative emission ven-

tilation solenoid. It closes the evaporative emis-
sion ventilation solenoid to seal the evaporative 
emission canister side of the system.

• The evaporative emission purge solenoid is 

opened to allow manifold vacuum to create low 
pressure (vacuum) in the EVAP system.

• When the EVAP system develops a vacuum of 2 

kPa (0.29 psi), the evaporative emission purge 
solenoid is closed and the fuel system vacuum is 
maintained at 2 kPa (0.29 psi).

• The ECM determines whether there is a leak in 

the EVAP system by monitoring the vacuum 
inside the fuel tank.

• The test is stopped when fuel vapor pressure 

exceeds predetermined limits.

.

DESCRIPTIONS OF MONITOR METHODS

• Measure reverting pressure after depressurizing 

by intake manifold negative pressure and detect 
malfunction if reverting pressure rises largely.

.

MONITOR EXECUTION

• Once per driving cycle.

.

MONITOR EXECUTION CONDITIONS 
(OTHER MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Evaporative emission purge solenoid monitor

• Evaporative emission purge system monitor

• Fuel tank differential pressure sensor monitor

• Evaporative emission ventilation solenoid monitor

• Fuel level sensor monitor

• Fuel temperature sensor monitor

Sensor (The sensors below are determined to be 

normal)

• Mass airflow sensor

• Barometric pressure sensor

• Intake air temperature sensor

• Engine coolant temperature sensor

.

AK704132

AB

Evaporative emission 
ventilation solenoid

Spare tire

Connector: D-116

D-116 (B)