Mitsubishi Eclipse. Manual — part 186
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-237
STEP 2. Check the heated oxygen sensor (front).
(1) Disconnect the heated oxygen sensor (front) connector
B-17 and connect test harness special tool, MD998464, to
the connector on the heated oxygen sensor (front) side.
(2) Warm-up the engine until engine coolant 80
°C (176°F) or
higher.
CAUTION
Be very careful when connecting the jumper wires; incor-
rect connection can damage the heated oxygen sensor
(front).
(3) Use the jumper wires to connect terminal No. 1 (red clip) to
the positive battery terminal and terminal No. 3 (blue clip) to
the negative battery terminal.
(4) Connect a digital volt meter between terminal No. 2 (black
clip) and terminal No. 4 (white clip).
(5) While repeatedly revving the engine, measure the heated
oxygen sensor (front) output voltage.
Standard value: 0.6
− 1.0 volt
Q: Is the voltage between 0.6 and 1.0 volt?
YES : Go to Step 3.
NO : Replace the heated oxygen sensor (front). Then go to
Step 5.
AK300403
1
2
3
4
AB
B-17 (B)
HEATED OXYGEN
SENSOR (FRONT)
CONNECTOR: B-17
HARNESS
CONNECTOR:
COMPONENT SIDE
AKX01625AC
BLUE
RED
BLACK
JUMPER
WIRES
WHITE
MD998464
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-238
STEP 3. Check connector B-17 at heated oxygen sensor
(front) and connector C-60 at ECM <M/T> or connector
C-57 at PCM <A/T> for damage.
Q: Is the connector in good condition?
YES : Go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 5.
AK300403
1
2
3
4
AB
B-17 (B)
HEATED OXYGEN
SENSOR (FRONT)
CONNECTOR: B-17
HARNESS
CONNECTOR:
COMPONENT SIDE
AK300415
82
78
8180
89
90
91
92
79
87
71
74 73 72
76 75
77
85
88
83
84
86
CONNECTOR: C-60 <M/T>
AB
C-60 (G)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-239
STEP 4. Check for short circuit to ground between heated
oxygen sensor (front) connector B-17 (terminal No. 4) and
ECM connector C-60 (terminal No. 76) <M/T> or PCM
connector C-57 (terminal No. 71) <A/T>.
Q: Is the harness wire in good condition?
YES : Replace the ECM or PCM. Then go to Step 5.
NO : Repair it. Then go to Step 5.
AK300735
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
CONNECTOR: C-57 <A/T>
C-57 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300403
1
2
3
4
AB
B-17 (B)
HEATED OXYGEN
SENSOR (FRONT)
CONNECTOR: B-17
HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-240
STEP 5. 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 P0131 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK300415
82
78
8180
89
90
91
92
79
87
71
74 73 72
76 75
77
85
88
83
84
86
CONNECTOR: C-60 <M/T>
AB
C-60 (G)
HARNESS CONNECTOR:
COMPONENT SIDE
AK300735
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
CONNECTOR: C-57 <A/T>
C-57 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
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