Mitsubishi Outlander GS45X. Manual — part 889
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-489
STEP 6. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− OBD-II Drive Cycle − Pattern 22
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0443 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
.
STEP 7. 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 22
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0443 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-490
DTC P0446: Evaporative Emission Control System Vent Control Circuit
AK700153
1
3
2
4
3 4
2
1
2
8
7
6
5
4
3
11
21
20
19
18
17
16
15
14
13
12
9
22
1
10
2
1
71 72 73 74 75 76 77 78 79 80 81 82
83 84 85 86 87 88 89 90 91 92 93 94
95 96 97 98 99
100 101 102 103 104
112 113 114
109
108
107
110 111
115 116
106
105
118
117
C-129
117
2
8
1
2
1
D-113
B-11
10A
WHITE
WHITE
WHITE
WHITE
GREEN
GREEN
GREEN
WHITE
A-33X
4
3
1
2
20
OFF
ON
AD
D-116
MU802779
1
36
FUSIBLE LINK
EVAPORATIVE EMISSION VENTILATION SOLENOID CIRCUIT
EVAPORATIVE EMISSION
VENTILATION SOLENOID
RELAY BOX
(ENGINE COMPARTMENT)
TO ECM
ENGINE
CONTROL
MODULE
MFI
RELAY
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-491
.
CIRCUIT OPERATION
• The evaporative emission ventilation solenoid
power is supplied from the MFI relay (terminal
No. 2).
• The ECM controls the evaporative emission ven-
tilation solenoid ground by turning the power tran-
sistor in the ECM ON and OFF.
.
TECHNICAL DESCRIPTION
• To judge if there is open circuit in the evaporative
emission ventilation solenoid drive circuit, ECM
measures the surge voltage of the evaporative
emission ventilation solenoid coil.
• The ECM drives the evaporative emission venti-
lation solenoid. After the solenoid is turned off,
the ECM will check if the solenoid coil produces a
surge voltage (battery positive voltage + 2 volts).
.
DESCRIPTIONS OF MONITOR METHODS
Off-surge does not occur after solenoid is operated
on to off.
.
MONITOR EXECUTION
Continuous
.
MONITOR EXECUTION CONDITIONS
(Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• Not applicable
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
AK700418
AC
Evaporative emission
ventilation solenoid
Spare tire
D-116 (B)
Connector: D-116
AK700402AB
ECM
B-11 (GR)
Connector: B-11
AK700399AB
MFI relay
A-33X
Connector: A-33X
AK900596
Connector: D-113
D-113
AB
AK900595
Connector: C-129
C-129
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-492
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
• Engine is being cranked.
• Battery positive voltage is between 10 and 16.5
volts.
Judgement Criteria
• The evaporative emission ventilation solenoid
coil surge voltage (battery positive voltage + 2
volts) is not detected for 0.2 second.
• The ECM monitors for this condition once during
the drive cycle.
Check Conditions
• Battery positive voltage is between 10 and 16.5
volts.
• ON duty cycle of the evaporative emission purge
solenoid is 0 percent.
• Evaporative emission ventilation solenoid is ON.
• More than 1 second has elapsed after the above
mentioned conditions have been met.
Judgement Criterion
• The evaporative emission ventilation solenoid
coil surge voltage (battery positive voltage + 2
volts) is not detected for 1 second after the evap-
orative emission ventilation solenoid is turned
OFF.
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• Evaporative emission ventilation solenoid failed.
• Harness damage
• Connector damage
• ECM failed.
End
No
No
Was surge voltage
(> VB + 2V) detected?
Good
AK604339
Malfunction
Start
Yes
Yes
Monitoring
conditions
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