Mitsubishi Galant 9G. Manual — part 1037
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-448
STEP 8. 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 −
(3) Check the diagnostic trouble code (DTC).
Q: Is DTC P0175 set?
YES : Replace the PCM. Then go to Step 9.
NO : The inspection is complete.
STEP 9. 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 −
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0175 output?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK303075
M
1
2
CONNECTOR: B-26, B-27, B-30
B-30 (GR)
B-27 (GR)
B-26 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-449
DTC P0181: Fuel Tank Temperature Sensor Circuit Range/Performance
1
2 3
4
5
22
21
23 24 25
26 27 28 29
30 31 32 33 34
35 36 37 38
39 40 41 42 43
AK400883
POWERTRAIN CONTROL
MODULE (PCM)
Fuel Tank Temperature Sensor Circuit
7
3
2
1
BLA
C
K
D-18
(MU802058)
41
FUEL TANK TEMPERATURE SENSOR
(INTEGRATED IN FUEL PUMP MODULE)
C-25
5 V
GRA
Y
-
GREEN
GRA
Y
-
GREEN
B-20
1 2
3 4
6
5
7 8
15 16
14
13
11 12
10
9
FROM PCM
AK303085
CONNECTOR: B-20
PCM
AB
AIR CLEANER
B-20
AK303086
CONNECTOR: C-25
C-25
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-450
.
CIRCUIT OPERATION
• 5-volt voltage is applied to the fuel tank tempera-
ture sensor output terminal (terminal No. 3) from
the PCM (terminal No. 41) via the resistor in the
PCM.
• 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 PCM detects the fuel tank temperature 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
.
AK303839AB
CONNECTOR: D-18
SERVICE
HOLE
FUEL TANK TEMPERATURE SENSOR
(INTEGRATED IN FUEL PUMP MODULE)
D-18 (GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-451
DTC SET CONDITIONS
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.
• The engine coolant temperature is higher than
60
°C (140°F).
• Maximum vehicle speed is higher than 30 km/h
(19 mph) after the engine starting sequence has
been completed.
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 (59˚F)
ENGINE
COOLANT TEMP.
> =60˚C (140˚F)
ENGINE
COOLANT TEMP.
> =60˚C (140˚F)
MAX.
VEHICLE SPEED
> 30km/h (19mph)
MAX.
VEHICLE SPEED
> 30km/h (19mph)
AK401537
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