Mitsubishi Montero (2004+). Manual — part 149
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-83
STEP 16. Check connector D-135 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 B-28 (terminal No. 1) and PCM connector D-135
(terminal No. 101).
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.
AK200947
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100
101
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120
CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
AK200975
1
2
3
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-28
B-28(B)
AK200947
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CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-84
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
AK302421
GREEN-YELLO
W
BLUE-YELLO
W
BLA
CK
POWERTRAIN CONTROL
MODULE (PCM)
5V
B-28
(MU802723)
MANIFOLD ABSOLUTE
PRESSURE SENSOR
3
1
2
Manifold Absolute Pressure Sensor Circuit
97
96
101
1
2
3
9192
939495
96979899
100
105
113114
115116117
118119120
106
107108109
110111112
101102103
104
D-135
(MU803805)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-85
.
CIRCUIT OPERATION
• A 5-volt voltage is supplied to the manifold abso-
lute pressure sensor power terminal (terminal No.
3) from PCM (terminal No. 97). The ground termi-
nal (terminal No. 2) is grounded with PCM (termi-
nal No. 96).
• A voltage that is proportional to the intake mani-
fold pressure is sent to the PCM (terminal No.
101) from the manifold absolute pressure sensor
output 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)
• Not applicable
.
AK200974
MANIFOLD
ABSOLUTE
PRESSURE
SENSOR
AD
B-28(B)
CONNECTOR: B-28
AK201038AF
CONNECTOR: D-135
PCM
D-135(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-86
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 < 5.0kPa (1.4in.Hg)
PRESSURE > 117kPa (34.6in.Hg)
CONTINUOUS
FAILURE FOR 2secs
MALFUNCTION
END
GOOD
START
AK302688
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