Mitsubishi Galant 9G. Manual — part 792
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-610
STEP 4. Using scan tool MB991958, check actuator test
item 29: 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
29, 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 5.
STEP 5. 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 − Procedure 1 −
Evaporative Emission System Leak Monitor
(2) Read the diagnostic trouble code.
Q: Is DTC P0441 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-611
DTC P0442: Evaporative Emission System Leak Detected (Small Leak)
.
AC306277
A
B
C
D
E
F
G
H
P
Q
R
O
N
M
I
J
K
L
AB
INTAKE MANIFOLD
FUEL TANK
EVAPORATIVE EMISSION
VENTILATION SOLENOID
CHECK VALVE
EVAPORATIVE EMISSION
PURGE SOLENOID
EVAPORATIVE
EMISSION CANISTER
ONBOARD REFUELING
VAPOR RECOVERY(ORVR)
VENT VALVE MODULE
SYSTEM DIAGRAM
CHAMBER
AC306400
AB
EVAPORATIVE EMISSION CANISTER
AC305066AC
EVAPORATIVE EMISSION
PURGE SOLENOID
INTAKE
MANIFOLD
AC305053AC
EVAPORATIVE EMISSION
VENTILATION SOLENOID
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-612
TECHNICAL DESCRIPTION
• The PCM monitors the Evaporative Emission
(EVAP) System pressure.
• The PCM 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 PCM 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
.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-613
LOGIC FLOW CHARTS (Monitor Sequence)
.
DTC SET CONDITIONS
Remaining fuel amount is 15
− 40 percent of capacity
(fuel level sensor output signal voltage is 1.4
− 2.4
volts).
Check Conditions A: At Start up
• Intake air temperature is 36°C (97°F) or less
when the engine is started.
• The engine coolant temperature is 36 °C (97 °F)
or less when the engine is started.
AC306649
0.04in, 0.02in GROSS LEAK MONITOR
START
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
MONITORING
CONDITIONS?
DEPRESSURIZE FUEL TANK PRESSURE
GROSS LEAK
MONITORING CONDITIONS
SHUT PURGE LINE
MEASURE REVERTING
PRESSURE : PFT
PFT > PT
SPECIFIED TIMES
MONITORED
MALFUNCTION
END
SPECIFIED TIMES
HAVE PASSED
MALFUNCTION
(GROSS LEAK)
GOOD
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