Mitsubishi Eclipse. Manual — part 187
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-241
DTC P0132: Heated Oxygen Sensor Circuit High Voltage (sensor 1)
AK000657
4
1 2
3
BL
ACK
BL
ACK
WHITE
B-17
MU802605
ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>
HEATED OXYGEN
SENSOR (FRONT)
FROM MFI RELAY
TO ECM
OR PCM
1
2
3
4
92 <M/T>
57 <A/T>*1
76 <M/T>
71 <A/T>*2
C-60 <M/T>
(MU803772)
C-54 <A/T>
(MU803781)
C-57 <A/T>
(MU803782)
NOTE
*1:PCM connector C-54 <A/T>
*2:PCM connector C-57 <A/T>
98
78
71
88 89
76 77
72
79
91
73
80
74
75
81
92
8283
93
8485
94
8687
9596
90
97
82
78
81
80
89 90 91 92
79
87
71
74
73
72
76
75
77
85
88
83 84
86
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
Heated Oxygen Sensor (front) Circuit
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-242
.
CIRCUIT OPERATION
• A voltage corresponding to the oxygen concen-
tration in the exhaust gas is sent to the ECM (ter-
minal No. 76) <M/T> or PCM (terminal No. 71)
<A/T> from the output terminal (terminal No. 4) of
the heated oxygen sensor (front).
• Terminal No. 2 of the heated oxygen sensor
(front) is grounded with ECM (terminal No. 92)
<M/T> or PCM (terminal No. 57) <A/T>.
.
TECHNICAL DESCRIPTION
• The heated oxygen sensor (front) detects the
concentration of oxygen in the exhaust gas; it
converts those data to voltage, and inputs the
resulting signals to the ECM <M/T> or PCM
<A/T>.
• When the heated oxygen sensor (front) begins to
deteriorate, the heated oxygen sensor signal
response becomes poor.
• The ECM <M/T> or PCM <A/T> forcibly varies
the air/fuel mixture to make it leaner and richer,
and checks the response speed of the heated
oxygen sensor (front). In addition, the ECM
<M/T> or PCM <A/T> also checks for an open
circuit in the heated oxygen sensor (front) output
line.
.
DESCRIPTIONS OF MONITOR METHODS
Heated oxygen sensor (front) output voltage 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
• Misfire monitor
• Fuel system monitor
Sensor (The sensor below is determined to be
normal)
• Volume airflow sensor
• Engine coolant temperature sensor
• Intake air temperature sensor
• Barometric pressure sensor
• Throttle position sensor
.
AK300051AB
B-17 (B)
HEATED OXYGEN
SENSOR (FRONT)
CONNECTOR: B-17
AK300060
ECM
CONNECTOR: C-60 <M/T>
AE
C-60 (G)
AK300060
PCM
CONNECTORS: C-54, C-57 <A/T>
AI
C-57 (GR)
C-54 (GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-243
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• 2 seconds or more have passed since the start-
ing sequence was completed.
Judgment Criteria
• Heated oxygen sensor (front) output voltage has
continued to be 1.2 volts or higher for 2 seconds.
.
OBD-ll DRIVE CYCLE PATTERN
Refer to Diagnosis Function
− OBD-ll Drive Cycle −
Procedure 6
.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• Short circuit in heated oxygen sensor (front) out-
put line.
• Connector damage.
• ECM failed. <M/T>
• PCM failed. <A/T>
DIAGNOSIS
Required Special Tools:
• MB991958 (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
START
END
NO
NO
YES
YES
MALFUNCTION
GOOD
2secs HAVE PASSED?
OUTPUT VOLTAGE > 1.2V
NO
YES
MONITORING
CONDITIONS
AK301437
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-244
STEP 1. 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 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 3.
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
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст