Mitsubishi Montero (2004+). Manual — part 227
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-395
STEP 8. Check the fuel pressure.
Refer to On-vehicle Service
− Fuel Pressure Test
Q: Are there any abnormalities?
YES : Repair it. Then go to Step 10.
NO : Go to Step 9.
STEP 9. 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) Read in the diagnostic trouble code (DTC).
Q: Is DTC P0175 set?
YES : Replace the PCM. Then go to Step 10.
NO : The inspection is complete.
STEP 10. 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 output?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK201292
1
2
B-11(GR)
B-35(GR)
B-33(GR)
CONNECTORS: B-11, B-33, B-35
AB
HARNESS
CONNECTORS:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-396
DTC P0181: Fuel Tank Temperature Sensor Circuit Range/Performance
POWERTRAIN CONTROL
MODULE (PCM)
Fuel Tank Temperature Sensor Circuit
2
16
3
2
7
1
BLA
C
K
BLA
C
K
LIGHT
GREEN-
RED
G-03
MU802337
1 2 3
AK201139
81
FUEL TANK TEMPERATURE SENSOR
(INTEGRATED IN FUEL LEVEL SENSOR)
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
D-111
8
7
6
5
1 2 3 4
F-07
MU802609
11
1
9 10
13
2
12
3 4
7
5
14
6
8
E-113
5 V
LIGHT
GREEN-
RED
LIGHT
GREEN-
RED
LIGHT GREEN-
RED
61
656667686970 717273
74757677787980 8182
8384
858687
8889
62
6364
D-134
(MU803804)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-397
.
CIRCUIT OPERATION
• 5-volt voltage is applied to the fuel tank tempera-
ture sensor output terminal (terminal No. 3) from
the PCM (terminal No. 81) 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. 2) 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 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
.
AK201038
CONNECTOR: D-134
AD
PCM
D-134(GR)
AK201053
E-113
AB
CONNECTOR: E-113
AK201055
CONNECTOR: D-111
D-111
AB
AK201040 AB
CONNECTOR: G-03
G-03(B)
FUEL TANK TEMPERATURE SENSOR
(INTEGRATED IN FUEL
LEVEL SENSOR)
AK304350
F-07 (B)
AB
CONNECTOR: F-07
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-398
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 (96.8°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 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 (9mph)
MAX.VEHICLE SPEED
> 30km/h (9mph)
AK302939
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