Mitsubishi Montero Sport (2004+). Manual — part 166
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-77
STEP 16. Check connector C-91 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 17.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 18.
STEP 17. Check for short circuit to ground and harness
damage between manifold absolute pressure sensor
connector A-12 (terminal No. 1) and PCM connector C-91
(terminal No. 91).
Q: Is the harness wire in good condition?
YES : Replace the manifold absolute pressure sensor. Then
go to Step 18.
NO : Repair it. Then go to Step 18.
AK104028
98
78
71
88
89
76
77
72
79
91
73
80
74
75
81
92
82
83
93
84
85
94
86
87
95
96
90
97
AB
CONNECTOR: C-91
C-91(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK200034
2 1
3
AB
CONNECTOR: A-12
A-12(B)
HARNESS
CONNECTOR:
COMPONENT
SIDE
AK104028
98
78
71
88
89
76
77
72
79
91
73
80
74
75
81
92
82
83
93
84
85
94
86
87
95
96
90
97
AB
CONNECTOR: C-91
C-91(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-78
STEP 18. 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 6 −
Other Monitor
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0107 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
DTC P0108: Manifold Absolute Pressure Circuit High Input
BL
ACK
BL
ACK
2 3
1
GREEN-
YELL
OW
YELL
OW
AK301860
Manifold Absolute Pressure Sensor Circuit
A-12
(MU802723)
1
POWERTRAIN CONTROL MODULE (PCM)
3
2
MANIFOLD ABSOLUTE
PRESSURE SENSOR
12
17
91
57
46
5V
C-90
71
76
77
72 73 74
75
79 80
78
81
87 88
89
91
90
92
97
98
82
93
83
94
84 85
95
86
96
C-91
(MU803782)
47
41
42 43
48 49 50 51 52 53 54 55 56 57
46
45
44
58
59
60 61 62 63
64 65 66
C-90
(MU803781)
1
10
2 3 4 5 6 7 8 9
11
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
C-71
C-91
JOINT
CONNEC-
TOR (4)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-79
.
CIRCUIT OPERATION
• A 5-volt voltage is supplied to the manifold abso-
lute pressure sensor power terminal (terminal No.
3) from PCM (terminal No. 46). The ground termi-
nal (terminal No. 2) is grounded with PCM (termi-
nal No. 57).
• A voltage that is proportional to the intake mani-
fold pressure is sent to the PCM (terminal No. 91)
from the manifold absolute pressure sensor out-
put terminal (terminal No. 1).
.
TECHNICAL DESCRIPTION
• The manifold absolute pressure sensor outputs a
voltage which corresponds to the intake manifold
pressure.
• The PCM checks whether this voltage is within a
specified range.
.
DESCRIPTIONS OF MONITOR METHODS
Manifold absolute pressure sensor output voltage is
out of specified range.
.
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
• Throttle position sensor
.
AK200033AC
CONNECTOR: A-12
MANIFOLD
ABSOLUTE
PRESSURE
SENSOR
A-12(B)
AK103738AE
CONNECTORS: C-90, C-91
PCM
C-91(GR)
C-90(GR)
AK103912AB
CONNECTOR: C-71
C-71
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-80
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• 8 minutes or more have passed since the starting
sequence was completed, when the engine cool-
ant temperature at engine start is 0
°C (32°F) or
lower.
Judgement Criteria
• Manifold Absolute pressure is 117 kPa (34.6
in.Hg) or higher for 2 seconds.
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
Procedure 6
.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• Manifold Absolute pressure sensor failed.
• Open manifold absolute pressure sensor circuit,
or connector damage.
• PCM failed.
YES
YES
YES
YES
NO
NO
NO
NO
MONITORING
CONDITIONS
PRESSURE < 4.9kPa (1.4in.Hg)
PRESSURE > 117kPa (34.6in.Hg)
CONTINUOUS
FAILURE FOR 2secs
MALFUNCTION
END
GOOD
START
AK301416
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