Mitsubishi Eclipse. Manual — part 192
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-261
STEP 10. Check for harness damage between injector
connector B-01, B-02, B-05, B-06 and ECM connector C-49
<M/T> or PCM connector C-50 <A/T>.
a. Check the harness wire between injector connector B-01
(terminal No. 2) and ECM connector C-49 (terminal No. 1)
<M/T> or PCM connector C-50 (terminal No. 1) <A/T> when
checking No. 1 cylinder.
b. Check the harness wire between injector connector B-02
(terminal No. 2) and ECM connector C-49 (terminal No. 14)
<M/T> or PCM connector C-50 (terminal No. 9) <A/T> when
checking No. 2 cylinder.
c. Check the harness wire between injector connector B-05
(terminal No. 2) and ECM connector C-49 (terminal No. 2)
<M/T> or PCM connector C-50 (terminal No. 24) <A/T>
when checking No. 3 cylinder.
d. Check the harness wire between injector connector B-06
(terminal No. 2) and ECM connector C-49 (terminal No. 15)
<M/T> or PCM connector C-50 (terminal No. 2) <A/T> when
checking No. 4 cylinder.
Q: Is the harness wire in good condition?
YES : Go to Step 11.
NO : Repair it. Then go to Step 12.
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
AK300737
1
2
CONNECTORS: B-01, B-02, B-05, B-06
AB
B-02 (GR)
B-01 (GR)
B-05 (GR)
B-06 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK300413
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
21
23
26
24
25
3
10
11
12
13
CONNECTOR: C-49 <M/T>
C-49 (G)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-262
STEP 11. Check the fuel pressure.
Refer to, Fuel Pressure Test
.
Q: Is the fuel pressure normal?
YES : Replace the ECM or PCM. Then go to Step 12.
NO : Repair it. Then go to Step 12.
STEP 12. 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 P0134 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK300414
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
C-50 (GR)
CONNECTOR: C-50 <A/T>
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-263
DTC P0135: Heated Oxygen Sensor Heater Circuit (sensor 1)
AK101513
3 4
1 2
57 58
60 61
53
52
51
55
54
56
59
62
RED
-
WHITE
RED
-
WHITE
RED
-
WHITE
RED
BROWN-
WHITE
BATTERY
1
2
4
3
HEATED OXYGEN
SENSOR (FRONT)
B-17
MU802605
1
2
3
4
TO ECM
OR PCM
TO ECM
OR PCM
ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>
60 <M/T>
3 <A/T>
C-50 <A/T>
(MU803784)
C-56 <M/T>
(MU803770)
MFI
RELAY
2
3 4
5 6
7 8
9
11 12 13 14 15 16 17 18 19 20
30
21 22 23
24 25
26 27 28 29
3132 33
34 35
1
10
Heated Oxygen Sensor (front) Heater Circuit
3 4
1 2
A-18X
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-264
.
CIRCUIT OPERATION
• Power is supplied from the MFI relay (terminal
No. 4) to the heated oxygen sensor (front) heater.
• The ECM (terminal No. 60) <M/T> or PCM (termi-
nal No. 3) <A/T> controls continuity to the heated
oxygen sensor (front) heater by turning the power
transistor in the ECM <M/T> or PCM <A/T> "ON"
and "OFF".
.
TECHNICAL DESCRIPTION
• The ECM <M/T> or PCM <A/T> checks whether
the heater current is within a specified range
when the heater is energized.
.
DESCRIPTIONS OF MONITOR METHODS
Heated oxygen sensor heater (front) current is out of
specified range when engine coolant temperature
is over 20
°C (68°F).
.
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
.
AK300060
ECM
CONNECTOR: C-56 <M/T>
AF
C-56 (G)
AK300060AD
C-50 (GR)
PCM
CONNECTOR: C-50 <A/T>
AK300051AB
B-17 (B)
HEATED OXYGEN
SENSOR (FRONT)
CONNECTOR: B-17
AK300121
MFI RELAY
CONNECTOR: A-18X
AB
A-18X
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