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
AK704168
AK704169
AK704170AC
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
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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
or GROUP 42C, Diagnosis
− ID
Code Registration Judgment Table <Vehicles with
WCM>
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
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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
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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 −
).
(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
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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)
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