Mitsubishi Montero Sport (2004+). Manual — part 273
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-505
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• ON duty cycle of the evaporative emission purge
solenoid is 0 percent.
• 20 seconds have elapsed from the time the duty
cycle of the evaporative emission purge solenoid
has turned to 0 percent.
Judgment Criteria
• The pressure in the fuel tank is −2 kPa (-0.59
in.Hg) or less.
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
Procedure 1
− Evaporative Emission System
Leak Monitor
.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• Evaporative emission purge solenoid failed.
• Evaporative emission ventilation solenoid failed.
• Choking up of hose between evaporative emis-
sion canister and evaporative emission ventila-
tion solenoid.
• Fuel tank differential pressure sensor circuit
related part(s) failed.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I
• MB991827: USB Cable
• MB991911: Main Harness B
START
END
NO
NO
NO
NO
YES
YES
YES
NO
MALFUNCTION
GOOD
CONTINUOUS
FAILURE FOR 100msecs
MONITORING CONDITIONS FOR
MALFUNCTION DETECTION
AK204004
FUEL-TANK PRESSURE
< -2kPa (-0.58in.Hg)
MONITORING CONDITIONS FOR
PASS JUDGEMENT?
REVERTING PRESSURE
DETECTED DURING
EVAP MONITOR?
YES
YES
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-506
STEP1. 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 73:
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
73, Fuel Tank Differential Pressure Sensor.
• The fuel tank differential pressures should be -3.3 to 3.3
kPa (-0.97 to 0.97 in.Hg).
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the fuel tank pressure between
−3.3 and 3.3 kPa
(
−0.97 to 0.97 inHg)?
YES : Go to Step 3.
NO : Refer to DTC P0451
− Evaporative Emission Control
System Pressure Sensor Range/Performance
AK303629AB
MB991911
MB991827
MB991824
16-PIN
AK303629AB
MB991911
MB991827
MB991824
16-PIN
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-507
STEP 3. Using scan tool MB991958, check actuator test
item 08: 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
08, 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 5.
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.
AK303629AB
MB991911
MB991827
MB991824
16-PIN
AK303629AB
MB991911
MB991827
MB991824
16-PIN
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-508
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 : Go to Step 1.
NO : The procedure is complete.
DTC P0442: Evaporative Emission Control System Leak Detected (Small Leak)
AC005137
AB
A
Q
O
N
P
B
C
M*
M*
E
A
D
M
E
L
K
F
G
I
H
FUEL TANK
EVAPORATIVE
EMISSION
CANISTER
EVAPORATIVE
EMISSION
PURGE SOLENOID
EVAPORATIVE
EMISSION
VENTILATION
SOLENOID
CHECK VALVE A
CHECK VALVE B
INTAKE MANIFOLD
SYSTEM DIAGRAM
J
VENT VALVE MODULE
NOTE
*: Manifold port
FUEL TANK DIFFERENTIAL
PRESSURE SENSOR
ACX01347AB
EVAPORATIVE EMISSION
PURGE SOLENOID
AC004938AB
EVAPORATIVE EMISSION
VENTILATION SOLENOID
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