Mitsubishi Outlander GS45X. Manual — part 646
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-407
DTC P0442: Evaporative Emission Control System Leak Detected (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)
AK704132
AB
Evaporative emission
ventilation solenoid
Spare tire
Connector: D-116
D-116 (B)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-408
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
.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-409
DTC SET CONDITIONS
Logic Flow Chart (Monitor Sequence)
.
Check Conditions
• Amount of remaining fuel is 15 − 40 percent of
capacity.
• Engine coolant temperature is 36°C (97°F) or
less when the engine is started.
• Intake air temperature is 36°C (97°F) or less
when the engine is started.
• Engine coolant temperature is higher than 60°C
(140
°F).
• Intake air temperature is higher than −10°C
(14
°F)
• Fuel tank temperature is less than 36°C (97°F)
• Power steering pressure switch: "OFF"
• When the evaporative emission purge solenoid
and evaporative emission ventilation solenoid are
closed, the pressure in the fuel tank is less than
451 Pa (0.13 in.Hg).
• The pressure fluctuation is less than 647 Pa (0.19
in.Hg).
AK604523
Start
Yes
No
Monitoring
conditions?
Depressurize fuel tank pressure
Yes
Yes
No
No
Gross leak
monitoring conditions
Shut purge line
Specified times
have passed
Malfunction
(Gross leak)
Measure reverting
pressure: PFT
Yes
Yes
No
No
PFT > PT
Specified times
monitored
Malfunction
End
Good
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-410
• Barometric pressure is higher than 76 kPa (22.4
in.Hg).
• Vehicle speed is 20 km/h (12 mph) or more.
• Fuel tank differential pressure sensor output volt-
age is 1.0
− 4.0 volts.
• At least 10 seconds have passed since the last
monitor was complete.
Judgement Criterion
• Internal pressure of the fuel tank has changed
more than 1,010 Pa (0.146 psi) in 20 seconds
after the tank and vapor lines were closed.
NOTE: The monitoring time (75
−
125 seconds)
depends on the fuel level and the temperature in the
fuel tank. The next monitoring occurs at least 10 sec-
onds later.
.
Check Conditions
• Amount of remaining fuel is 40 − 80 percent of
capacity.
• Engine coolant temperature is 36°C (97°F) or
less when the engine is started.
• Intake air temperature is 36°C (97°F) or less
when the engine is started.
• Engine coolant temperature is higher than 20°C
(68
°F).
• Intake air temperature is higher than −10°C
(14
°F)
• Fuel tank temperature is less than 36°C (97°F).
• When the evaporative emission purge solenoid
and evaporative emission ventilation solenoid are
closed, the pressure in the fuel tank is less than
324 Pa (0.09 in.Hg).
• Barometric pressure is higher than 76 kPa (22.4
in.Hg).
• Fuel tank differential pressure sensor output volt-
age is 1.0
− 4.0 volts.
• At least 10 seconds have passed since the last
monitor was complete.
Judgment Criterion
• Internal pressure of the fuel tank has changed
more than 1,922 Pa (0.279 psi) in 88 seconds
after the tank and vapor lines were closed.
NOTE: The monitoring time (10
−
14 minutes)
depends on the fuel level and the temperature in the
fuel tank. The next monitoring occurs at least 10 sec-
onds later.
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
Pattern 5
.
.
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CODE TO BE
SET ARE:)
• Loose fuel cap.
• Fuel cap relief pressure is incorrect.
• Evaporative emission canister seal is leaking.
• Fuel tank, purge line or vapor line seal is leaking.
• Evaporative emission ventilation solenoid does
not seal.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
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