Mitsubishi Eclipse. Manual — part 483
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-475
STEP 6. Check the fuel pressure.
Refer to Fuel Pressure Test
.
Q: Is the fuel pressure normal?
YES : Go to Step 7.
NO : Repair or replace it. Then go to Step 8.
STEP 7. Replace the left bank injector.
(1) Replace the left bank injector.
(2) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− OBD-II Drive Cycle − Procedure 2 −
Fuel Trim Monitor
(3) Check the diagnostic trouble code (DTC).
Q: Is DTC P0175 set?
YES : Replace the ECM or PCM. Then go to Step 8.
NO : The inspection is complete.
STEP 8. 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 2 −
Fuel Trim Monitor
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0175 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK300753
1
2
CONNECTORS: B-02, B-06, B-25
AB
B-02 (GR)
B-06 (GR) B-25 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-476
DTC P0181: Fuel Tank Temperature Sensor Circuit Range/Performance
5 V
ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>
FUEL TEMPERATURE SENSOR
(INTEGRATED IN FUEL PUMP MODULE)
Fuel Temperature Sensor Circuit
12
3
1
37
BL
ACK
GRA
Y
-
GREEN
42 43
48 49 50 51 52 53 54 55 56 57
46
45
44
58 59
60 61 62 63
64 65 66
47
41
C-55 <A/T>
(MU803781)
AK101604
96 <M/T>
51 <A/T>
4
17
1
12 13 14
18
30
41
34
3
16
10
6 7
19
31
42
20
32
43
21
33
25
24
26
36
35
37
29
28
15
27
38
8 9
39 40
11
2
22
5
23
C-90
C-28
7 8
5
3 4
35
34
10 11 12
2122 23 24
13 14 15
25 26 27
16
28
17
18 19 20
29
30 31
32 33
36 37
38
9
1 2
6
1 2 3
4 5
D-17
(MU802058)
GRA
Y
-
GREEN
GRA
Y
-
GREEN
80
87
81
94
85
82
84
93
86
98
99
74
92
73
83
88
91
95
97
96
100
89
78
71
90
76 77
75
72
79
C-62 <M/T>
(MU803783)
AK300244
CONNECTOR: C-55 <A/T>
AG
PCM
C-55 (GR)
AK300094
CONNECTOR: C-62 <M/T>
ECM
AB
C-62 (GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-477
.
CIRCUIT OPERATION
• 5-volt voltage is applied to the fuel tank tempera-
ture sensor output terminal (terminal No. 3) from
the ECM (terminal No. 96) <M/T> or PCM (termi-
nal No. 51) <A/T> via the resistor in the ECM
<M/T> or PCM <A/T>.
• The fuel tank temperature sensor output voltage
increases when the resistance increases and
decreases when the resistance decreases. The
ground terminal (terminal No. 1) is grounded to
the vehicle body.
.
TECHNICAL DESCRIPTION
• The fuel tank temperature sensor converts the
fuel tank temperature to a voltage.
• The ECM <M/T> or PCM<A/T> detects the fuel
tank temperature in the fuel tank with this output
voltage.
.
DESCRIPTIONS OF MONITOR METHODS
Fuel tank temperature at engine start is higher than
engine coolant temperature at engine start by
specified value when engine is cold start condi-
tion.
.
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)
• Engine coolant temperature sensor
• Intake air temperature sensor
.
AK300119
CONNECTOR: C-28
AB
C-28
AK300118
CONNECTOR: C-90
AB
C-90
AK300120AB
D-17 (GR)
CONNECTOR: D-17
FUEL TEMPERATURE
SENSOR
(INTEGRATED IN
FUEL PUMP MODULE)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-478
Logic Flow Chart
.
Check Conditions
• The engine coolant temperature − intake air tem-
perature is 5
°C (9°F) or less when the engine is
started.
• The engine coolant temperature is between
−10°C (14°F) and 36°C (97°F) when the engine is
started.
• Engine coolant temperature is higher than 60°C
(140
°F).
• Maximum vehicle speed is higher than 30 km/h
(17 mph) after the starting sequence has been
completed.
Judgement Criteria
• The fuel tank temperature − engine coolant tem-
perature is 15
°C (27°F) or more when the engine
is started.
.
START
NO
YES
YES
YES
YES
NO
NO
NO
END
NO
YES
YES
NO
MALFUNCTION
GOOD
MONITORING
CONDITIONS
“FUEL TEMP. AT
ENGINE START” -
“ENGINE COOLANT TEMP. AT
ENGINE START”
> 15˚C (27˚F)
ENGINE COOLANT TEMP.
> =60˚C (140˚F)
ENGINE COOLANT TEMP.
> =60˚C (140˚F)
MAX.VEHICLE SPEED
> 30km/h (17mph)
MAX.VEHICLE SPEED
> 30km/h (17mph)
AK301444
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