Mitsubishi Outlander GS45X. Manual — part 891
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-497
DTC P0450: Evaporative Emission Control System Pressure Sensor Malfunction
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
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-498
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
2
8
7
6
5
4
3
11
21
20
19
18
17
16
15
14
13
12
9
22
1
10
3
2
1
AK704184
3
2
1
4
2
3
114
113
112
5 V
AB
D-19
(MU802723)
C-129
B-11
ENGINE
CONTROL
MODULE
FUEL TANK DIFFERENTIAL PRESSURE SENSOR CIRCUIT
FUEL TANK DIFFERENTIAL
PRESSURE SENSOR
YELLO
W
-BLA
CK
YELLO
W
-BLA
CK
BR
O
W
N
B
R
O
WN
RED-GREEN
RED-GREEN
AK704190
ECM
B-11 (GR)
Connector: B-11
AB
AK900595
Connector: C-129
C-129
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-499
.
CIRCUIT OPERATION
• The ECM (terminal No. 114) supplies a 5-volt ref-
erence signal to the fuel tank differential pressure
sensor (terminal No. 3). The fuel tank differential
pressure sensor (terminal No. 2) is grounded
through the ECM (terminal No. 113).
• The fuel tank differential pressure sensor (termi-
nal No. 1) returns a voltage signal to the ECM
(terminal No. 112) that is proportional to the pres-
sure in the fuel tank.
.
TECHNICAL DESCRIPTION
• The ECM monitors the fuel tank differential pres-
sure sensor output voltage.
• The ECM determines whether the fuel tank differ-
ential pressure sensor signal voltage is within
normal operating parameters.
.
DESCRIPTIONS OF MONITOR METHODS
• Compare purge solenoid status with fuel tank dif-
ferential pressure sensor output voltage.
.
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)
• Evaporative emission purge solenoid monitor
• Evaporative emission ventilation solenoid monitor
• Fuel temperature sensor monitor
• Fuel level 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
• Accelerator pedal position sensor
.
AK704189
Fuel tank differential
pressure sensor
D-19
Connector: D-19
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-500
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• Intake air temperature is greater than 5°C (41°F).
• Engine speed is 1,594 r/min or greater.
• Volumetric efficiency is between 20 and 60 per-
cent.
Judgement Criteria
• When the evaporative emission purge solenoid is
off, the fuel tank differential pressure sensor out-
put voltage remains 1.0 volt or less for 10 sec-
onds.
Check Conditions
• Intake air temperature is between 5°C (41°F) and
45
°C (113°F).
• Engine speed is 1,594 r/min or greater.
• Volumetric efficiency is between 20 and 60 per-
cent.
Judgement Criterion
• When the evaporative emission purge solenoid
valve is fully operational (100 percent ratio), the
fuel tank differential pressure sensor output volt-
age remains at 4.0 volts or greater for 10 sec-
onds.
.
OBD-ll DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-ll Drive Cycle −
Pattern 5
.
.
AK704950
No
Yes
Continuous
failure for 10 secs
Start
End
No
No
No
Yes
Yes
Malfunction
Good
Monitoring
conditions
Output voltage
< 1.0V
Output voltage
> 4.0V
Yes
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