Mitsubishi Outlander GS45X. Manual — part 577
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-131
STEP 4. Check harness connector A-33X at MFI relay for
damage.
Q: Is the harness connector in good condition?
YES : Repair harness wire between MFI relay connector
A-33X (terminal No. 2) and mass airflow sensor
connector A-07 (terminal No. 2) because of open
circuit or short circuit to ground. Then go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
P.00E-2
. Then go to Step 10.
STEP 5. Check harness connector B-10 at ECM for
damage.
Q: Is the harness connector in good condition?
YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
P.00E-2
. Then go to Step 10.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-132
STEP 6. Measure the sensor output voltage at ECM
connector B-11 by using power plant ECU check harness
special tool MB992110.
(1) Disconnect all ECM connectors. Connect the power plant
ECU check harness special tool MB992110 between the
separated connectors.
(2) Start the engine.
(3) Measure the voltage between terminal No. 87 and ground.
• When the engine is revved, voltage should be increase
in response to revving.
Q: Is the measured voltage normal?
YES : Go to Step 9.
NO : Go to Step 7.
STEP 7. Check for open circuit and short circuit to ground
between mass airflow sensor connector A-07 (terminal No.
3) and ECM connector B-11 (terminal No. 87).
Q: Is the harness wire in good condition?
YES : Go to Step 8.
NO : Repair it. Then go to Step 10.
AK604171
ECM
AB
Body side harness
MB992110
82 81 80 79 78 77 76 75 74 73 72 71
94 93 92 91 90 89 88 87 86 85 84 83
99 98 97 96 95
100
101
102
103
104
105
106
112
113
114
109 108
107
110
111
115
116
117
118
AK604176 AB
Power plant ECU
check harness connector
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-133
STEP 8. Replace the mass airflow sensor.
(1) Replace the mass airflow sensor.
(2) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− OBD-II Drive Cycle − Pattern 23
(3) Check the diagnostic trouble code (DTC).
Q: Is DTC P0102 set?
YES : Replace the ECM. When the ECM is replaced,
register the ID code. Refer to GROUP 42B, Diagnosis
− ID Code Registration Judgment Table <Vehicles
with KOS>
P.42B-15
or GROUP 42C, Diagnosis
− ID
Codes Registration Judgment Table <Vehicles with
WCM>
P.42C-10
. Then go to Step 10.
NO : The inspection is complete.
STEP 9. Using scan tool MB991958, check data list item 10:
Mass Airflow Sensor.
(1) Start the engine and run at idle.
(2) Set scan tool MB991958 to the data reading mode for item
10, Mass Airflow Sensor.
(3) Warm up the engine to normal operating temperature: 80
°C
to 95
°C (176°F to 203°F).
• The standard value during idling should be between
1,350 and 1,670 millivolts.
• When the engine is revved, the mass airflow rate should
increase according to the increase in engine speed.
(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
− How to
Cope with Intermittent Malfunctions
P.00-15
.
NO : Replace the ECM. When the ECM is replaced,
register the ID code. Refer to GROUP 42B, Diagnosis
− ID Code Registration Judgment Table <Vehicles
with KOS>
P.42B-15
or GROUP 42C, Diagnosis
− ID
Codes Registration Judgment Table <Vehicles with
WCM>
P.42C-10
. Then go to Step 10.
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 − Pattern 23
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0102 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK700568AB
MB991824
MB991827
MB991910
Data link
connector
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-134
DTC P0103: Mass Airflow Circuit High Input
AK604114
71 72 73 74 75 76 77 78 79 80 81 82
83 84 85 86 87 88 89 90 91 92 93 94
95 96 97 98 99
100 101 102 103 104
112 113 114
109
108
107
110 111
115 116
106
105
118
117
1
3
2
4
3 4
2
1
AC
MASS AIRFLOW SENSOR CIRCUIT
MASS AIRFLOW SENSOR
87
88
3
2
HEAT
SENSITIZING
RESISTANCE
BLUE
A-07
(MU805110)
4
20A
WHITE
WHITE
WHITE
A-33X
4
3
1
2
22
B-11
36
FUSIBLE LINK
OFF
ON
RELAY BOX
(ENGINE COMPARTMENT)
ENGINE
CONTROL
MODULE
TO ECM
MFI
RELAY
BLA
CK-WHITE
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