Mitsubishi Montero Sport (2004+). Manual — part 212
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-261
Check Conditions
• Engine coolant temperature is higher than 76°C
(169
°F).
• The right bank heated oxygen sensor (front) is
active.
• The cumulative volume airflow sensor output fre-
quency is higher than 4,000 Hz.
• Repeat 3 or more times: drive
*1
, stop
*2
.
Drive
*1
:
• Engine speed is higher than 1,500 r/min.
• Volumetric efficiency is higher than 40 per-
cent.
• Vehicle speed is higher than 30 km/h (18.7
mph).
• A total of more than 10 seconds have
elapsed with the above mentioned condi-
tions, and more than 2 seconds have
elapsed with the fuel shut off.
Stop
*2
:
• Vehicle speed is lower than 1.5 km/h
(0.9mph).
Judgement Criteria
• Change in the output voltage of the right bank
heated oxygen sensor (rear) is lower than 0.313
volt.
NOTE: Monitoring stops after fuel has been shut
off for more than 38 seconds.
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
Procedure 4
− Heated Oxygen Sensor Monitor
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• Right bank heated oxygen sensor (rear) failed.
• Connector damage.
• PCM failed.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I
• MB991827: USB Cable
• MB991911: Main Harness B
• MB991316: Test Harness
STEP 1. Using scan tool MB991958, check data list item 69:
Heated Oxygen Sensor Bank 1, Sensor 2 (right rear).
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Start the engine and run at idle.
(3) Set scan tool MB991958 to the data reading mode for item
69, Heated Oxygen Sensor Bank 1, Sensor 2 (right rear).
(4) Warm up the engine.
• After increasing the output voltage 0.15 volt or more by
the engine revving, finish it. Then confirm that the output
voltage reduces to 0.15 volt or less within 3 seconds.
(5) 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
NO : Replace the heated oxygen sensor (rear). Then go to
AK303629AB
MB991911
MB991827
MB991824
16-PIN
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-262
STEP 2. Check the right bank heated oxygen sensor (rear).
(1) Disconnect the right bank heated oxygen sensor (rear)
connector E-47 and connect test harness special tool,
MB991316, to the connector on the right bank heated
oxygen sensor (front) side.
(2) Warm up the engine until engine coolant 80
°C (176°F) or
higher.
(3) Perform a tracing for 5 minutes or more with the engine
speed of 4,500 r/min.
(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 right
bank heated oxygen sensor (rear) output voltage.
Standard value: 0.6
− 1.0 volt
CAUTION
• Be very careful when connecting the jumper wire;
incorrect connection can damage the oxygen sensor.
• Be careful the heater is broken when voltage of beyond
12 volts is applied to the oxygen sensor heater.
NOTE: If the sufficiently high temperature (of approximate
400
°
C or more) is not reached although the oxygen sensor
is normal, the output voltage would be possibly low
although the rich air-fuel ratio. Therefore, if the output volt-
age is low, use a jumper wire to connect the terminal No.2
and the terminal No. 1 of the oxygen sensor with a (+) termi-
nal and (-) terminal of 12 volts power supply respectively,
then check again.
Q: Is the voltage between 0.6 and 1.0 volt?
YES : Go to Step 3.
NO : Replace the right bank heated oxygen sensor (rear).
Then go to Step 4.
AK200492
1
2
3
4
E-47(GR)
AB
CONNECTOR: E-47
HARNESS
CONNECTOR:
COMPONENT SIDE
RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)
AKX01624
HEATED
OXYGEN
SENSOR
COMPONENT
SIDE
CONNECTOR
MB991316
WHITE
BLACK
AN
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-263
STEP 3. Check harness connector E-47 at right bank
heated oxygen sensor (rear) and harness connector C-90,
C-91 at PCM for damage.
Q: Is the harness connector in good condition?
YES : Replace the PCM.Then go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 4.
STEP 4. 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 4 −
Heated Oxygen Sensor Monitor
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0139 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK200492
1
2
3
4
E-47(GR)
AB
CONNECTOR: E-47
HARNESS
CONNECTOR:
COMPONENT SIDE
RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)
AK104029
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
97
AB
CONNECTORS: C-90, C-91
C-90(GR) C-91(GR)
C-90 HARNESS CONNECTOR:
COMPONENT SIDE
C-91 HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-264
DTC P0141: Heated Oxygen Sensor Heater Circuit (bank 1 sensor 2)
AK200184
Right Bank Heated Oxygen Sensor (rear) Heater Circuit
RED
RED
WHITE-
BLA
CK
WHITE-
BLA
CK
WHITE-
BLA
CK
POWERTRAIN CONTROL MODULE (PCM)
1
2
22
33
1
3
2
4
3
4
12
28
27
MFI
RELAY
RIGHT BANK HEATED OXYGEN
SENSOR (REAR)
FUSIBLE LINK (12)
TO PCM TO PCM
C-59
1
10
2 3 4 5 6 7 8 9
11
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
C-14
10
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
C-89
(MU803784)
BLUE-
YELLO
W
RED
RED
BLUE-
YELLO
W
BLUE-
YELLO
W
10
1
11
12
1 2
3 4
E-47
MU802665
1
10
15
2
11
3
12
4
13 14
5
16
6
17
7
18
8
19
9
20
E-45
RED
6
10
2
7
8
3 4 5
9
11 12 13
1
C-79
MU801553
JOINT
CONNECTOR (5)
1
2
3
4
AK103911AB
CONNECTOR: C-14
C-14
AK103911AC
CONNECTOR: C-79
C-79
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст