Mitsubishi Eclipse. Manual — part 440
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-303
STEP 4. Check for short circuit to ground between right
bank heated oxygen sensor (rear) connector B-28
(terminal No. 4) and ECM connector C-62 (terminal No. 74)
<M/T> or PCM connector C-59 (terminal No. 74) <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.
AK300445
80
87
81
94
85
82
84
93
86
98
99
74
92
73
83
88
91
95
97 96
100
89
78
71
90
76
77
75
72
79
CONNECTOR: C-62 <M/T>
C-62 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300429
1
2
3
4
RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)
CONNECTOR: B-28
AB
B-28 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-304
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 P0137 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK300460
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-59 <A/T>
C-59 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300445
80
87
81
94
85
82
84
93
86
98
99
74
92
73
83
88
91
95
97 96
100
89
78
71
90
76
77
75
72
79
CONNECTOR: C-62 <M/T>
C-62 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-305
DTC P0138: Heated Oxygen Sensor Circuit High Voltage (bank 1, sensor 2)
AK103015
BLA
CK
BLA
CK
PINK
BLUE
3 4
1 2
FROM MFI RELAY
RIGHT BANK HEATED
OXYGEN SENSOR (REAR)
TO ECM
OR PCM
74<M/T>*2
74<A/T>*4
49<M/T>*1
57<A/T>*3
1
3
2
4
B-28
MU802665
NOTE
*1: ECM connector C-58 <M/T>
*2: ECM connector C-62 <M/T>
*3: PCM connector C-55 <A/T>
*4: PCM connector C-59 <A/T>
ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>
65
43
50
42
49
41
48
60 61
64
46 47
58 59
67 68
45
56
66
52
51
44
53
62
54
63
57
55
C-58 <M/T>
(MU803782)
C-55 <A/T>
(MU803781)
42 43
48 49 50 51 52 53 54 55 56 57
46
45
44
58 59
60 61 62 63
64 65 66
47
41
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
80
87
81
94
85
82
84
93
86
98
99
74
92
73
83
88
91
95
97
96
100
89
78
71
90
76 77
75
72
79
97
C-62 <M/T>
(MU803783)
C-59 <A/T>
(MU803782)
Right Bank Heated Oxygen Sensor (rear) Circuit
S142
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-306
.
CIRCUIT OPERATION
• A voltage corresponding to the oxygen concen-
tration in the exhaust gas is sent to the ECM (ter-
minal No. 74) <M/T> or PCM (terminal No. 74)
<A/T> from the output terminal (terminal No. 4) of
the right bank heated oxygen sensor (rear).
• Terminal No. 2 of the right bank heated oxygen
sensor (rear) is grounded with ECM (terminal No.
49) <M/T> or PCM (terminal No. 57) <A/T>.
.
TECHNICAL DESCRIPTION
• The output signal of the right bank heated oxygen
sensor (front) is compensated by the output sig-
nal of the right bank heated oxygen sensor (rear).
• The ECM <M/T> or PCM <A/T> checks for an
open circuit in the right bank heated oxygen sen-
sor (rear) output line.
.
DESCRIPTIONS OF MONITOR METHODS
Right bank heated oxygen sensor (rear) output volt-
age is over 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)
• Heated oxygen sensor heater (front) monitor
• Heated oxygen sensor heater (rear) monitor
• Air/fuel ratio feedback monitor
Sensor (The sensor below is determined to be
normal)
• Volume airflow sensor
• Engine coolant temperature sensor
• Intake air temperature sensor
• Barometric pressure sensor
.
AK300075
RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)
CONNECTOR: B-28
AB
B-28 (GR)
AK300091
CONNECTORS: C-58, C-62 <M/T>
ECM
AD
C-58 (GR)
C-62 (GR)
AK300244
CONNECTORS: C-55, C-59 <A/T>
AD
PCM
C-55 (GR)
C-59 (GR)
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