Mitsubishi Galant (2004+). Manual — part 816
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-81
(3) Measure the voltage between terminal No. 102 and ground.
• When altitude is 0 m (0 foot), voltage should be 3.7 and
4.3 volts.
• When altitude is 600 m (1,969 feet), voltage should be
3.4 and 4.0 volts.
• When altitude is 1,200 m (3,937 feet), voltage should be
3.2 and 3.8 volts.
• When altitude is 1,800 m (5,906 feet), voltage should be
2.9 and 3.5 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage normal?
YES : Go to Step 12.
NO : Repair harness wire between manifold absolute
pressure sensor connector B-02 (terminal No. 1) and
PCM connector B-22 (terminal No. 102) because of
harness damage. Then go to Step 13.
STEP 12. Using scan tool MB991958, check data list item
95: Manifold Absolute Pressure Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991958 to the data reading mode for item
95, Manifold Absolute Pressure Sensor.
• When altitude is 0 m (0 foot), 101 kPa (29.8 in.Hg).
• When altitude is 600 m (1,969 feet), 95 kPa (28.1 in.Hg).
• When altitude is 1,200 m (3,937 feet), 88 kPa (26.0
in.Hg).
• When altitude is 1,800 m (5,906 feet), 81 kPa (23.9
in.Hg).
(3) Start the engine.
• When the engine is idling, 19 − 33 kPa (5.6 − 9.7 in.Hg).
• When the engine is suddenly revved, manifold absolute
pressure varies.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
NO : Replace the PCM. Then go to Step 13.
STEP 13. 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 P0106 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
104
96
94
95
93 92 91
99 98 97
103 102 101 100
108 107 106 105
113 112 111 110 109
AK203035AB
POWER PLANT ECU
CHECK HARNESS
CONNECTOR
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-82
DTC P0107: Manifold Absolute Pressure Circuit Low Input
.
1
2
3
52
51
53 54 55 56
57
58 59 60 61 62
63
64 65 66 67 68 69
70
71 72 73 74 75
76
77 78 79 80 81 82
83
100
99
92
91
93 94 95
96 97 98
101 102 103 104
105 106 107 108
109 110 111 112 113
AK303807
GREEN-YELLO
W
BLUE-RED
BLA
CK
POWERTRAIN CONTROL
MODULE (PCM)
5 V
MANIFOLD ABSOLUTE
PRESSURE SENSOR
3
1
2
Manifold Absolute Pressure Sensor Circuit
68
69
102
B-21
B-22
B-02
(MU802723)
AK303808AB
CONNECTOR: B-02
MANIFOLD
ABSOLUTE
PRESSURE
SENSOR
B-02 (B)
AK303013
CONNECTORS: B-21, B-22
PCM
AB
AIR CLEANER
B-22 (B)
B-21 (B)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-83
CIRCUIT OPERATION
• A 5-volt voltage is supplied to the manifold abso-
lute pressure sensor power terminal (terminal No.
3) from the PCM (terminal No. 68). The ground
terminal (terminal No. 2) is grounded with PCM
(terminal No. 69).
• A voltage that is proportional to the intake mani-
fold pressure is sent to the PCM (terminal No.
102) 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)
• Engine coolant temperature sensor
• Throttle position sensor
.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-84
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
• 8 minutes or more have passed since the engine
starting sequence was completed, when the
engine coolant temperature at engine start is 0
°C
(32
°F) or lower.
• Throttle position sensor output voltage is 1.25
volts or higher.
Judgement Criteria
• Manifold Absolute pressure is 5 kPa (1.5 in.Hg)
or lower 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 or shorted manifold absolute pressure sen-
sor circuit, harness damage or connector dam-
age.
• PCM failed.
YES
YES
YES
YES
NO
NO
NO
NO
MONITORING
CONDITIONS
PRESSURE
< 5kPa (1.5in.Hg)
PRESSURE
> 117kPa (34.6in.Hg)
CONTINUOUS
FAILURE FOR 2secs
MALFUNCTION
END
GOOD
START
AK302011
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