Mitsubishi Outlander GS45X. Manual — part 884
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-469
STEP 1. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P0451 set?
YES : Refer to DTC P0451
− Evaporative Emission Control
System Pressure Sensor Range/Performance
.
NO : Go to Step 2.
STEP 2. Using scan tool MB991958, check data list item 52:
Fuel Tank Differential Pressure Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Remove the fuel cap.
(3) Set scan tool MB991958 to the data reading mode for item
52, Fuel Tank Differential Pressure Sensor.
• The fuel tank differential pressures should be 1,500 and
3,500 millivolts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the fuel tank pressure between 1,500 and 3,500
millivolts?
YES : Go to Step 3.
NO : Refer to DTC P0451
− Evaporative Emission Control
System Pressure Sensor Range/Performance
.
AK700568AB
MB991824
MB991827
MB991910
Data link
connector
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-470
STEP 3. Using scan tool MB991958, check actuator test
item 10: Evaporative Emission Purge Solenoid.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991958 to the actuator test mode for item
10, Evaporative emission purge solenoid.
• An operation sound should be heard and vibration
should be felt when the evaporative emission purge
solenoid is operated.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the solenoid operating properly?
YES : Go to Step 4.
NO : Replace the evaporative emission purge solenoid.
Then go to Step 6.
STEP 4. Using scan tool MB991958, check actuator test
item 15: Evaporative Emission Ventilation Solenoid.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991958 to the actuator test mode for item
15, Evaporative emission ventilation solenoid.
• An operation sound should be heard and vibration
should be felt when the evaporative emission ventilation
solenoid is operated.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the solenoid operating properly?
YES : Repair or replace the vent hose and air filter. Then go
to Step 5.
NO : Replace the evaporative emission ventilation
solenoid. Then go to Step 6.
STEP 5. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− OBD-II Drive Cycle − Pattern 5
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0441 set?
YES : Replace the ECM. When the ECM is replaced,
register the ID code. Refer to GROUP 42B, Diagnosis
− ID Codes Registration Judgment Table <Vehicles
or GROUP 42C, Diagnosis
− ID
Codes Registration Judgment Table <Vehicles with
WCM>
NO : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunctions
.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-471
STEP 6. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− OBD-II Drive Cycle − Pattern 5
(2) Read the diagnostic trouble code.
Q: Is DTC P0441 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
DTC P0442: Evaporative Emission Control System Leak Detected (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
AK900408AC
Evaporative emission purge solenoid
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-472
.
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
.
AK700418
AC
Evaporative emission
ventilation solenoid
Spare tire
D-116 (B)
Connector: D-116
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