Mitsubishi Montero Sport (2004+). Manual — part 215
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-273
NOTE: Check harness after checking intermediate connector
C-14, C-79 and E-45. If intermediate connectors are damaged,
repair or replace them. Refer to GROUP 00E, Harness Con-
nector Inspection
. Then go to Step 12.
Q: Is the harness wire in good condition?
YES : Go to Step 10.
NO : Repair it. Then go to Step 12.
STEP 10. Check for harness damage between right bank
heated oxygen sensor (rear) connector E-47 (terminal No.
3) and PCM connector C-89 (terminal No. 27).
AK200492
1
2
3
4
E-47(GR)
AB
CONNECTOR: E-47
HARNESS
CONNECTOR:
COMPONENT SIDE
RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)
AK103914
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
AB
CONNECTOR: C-89
C-89(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-274
NOTE: Check harness after checking intermediate connector
C-79 and E-45. If intermediate connectors are damaged, repair
or replace them. Refer to GROUP 00E, Harness Connector
Inspection
. Then go to Step 12.
Q: Is the harness wire in good condition?
YES : Go to Step 11.
NO : Repair it. Then go to Step 12.
STEP 11. Retest the system.
(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 P0141 set?
YES : Replace the PCM. Then go to Step 12.
NO : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
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 P0141 set?
YES : Repeat the troubleshooting.
NO : The procedure is complete.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-275
DTC P0150: Heated Oxygen Sensor Circuit (bank 2 sensor 1)
AK000490
Left Bank Heated Oxygen Sensor (front) Circuit
WHITE
BL
ACK
RED
BL
ACK
BL
ACK
-RED
C-91
POWERTRAIN CONTROL MODULE (PCM)
FROM MFI RELAY
TO PCM
LEFT BANK HEATED OXYGEN SENSOR (FRONT)
4
71
57
C-90
12
32
2
3
1
22
33
1 2
3 4
A-09
MU802665
71
76
77
72 73 74
75
79 80
78
81
87 88
89
91
90
92
97
98
82
93
83
94
84 85
95
86
96
C-91
(MU803782)
47
41
42 43
48 49 50 51 52 53 54 55 56 57
46
45
44
58
59
60 61 62 63
64 65 66
C-90
(MU803781)
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-71
JOINT
CONNECTOR (4)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-276
.
CIRCUIT OPERATION
• A voltage corresponding to the oxygen concen-
tration in the exhaust gas is sent to the PCM (ter-
minal No. 71) from the output terminal (terminal
No. 4) of the left bank heated oxygen sensor
(front).
• Terminal No. 2 of the left bank heated oxygen
sensor (front) is grounded with PCM (terminal
No. 57).
.
TECHNICAL DESCRIPTION
• The left bank heated oxygen sensor (front)
detects the concentration of oxygen in the
exhaust gas; it converts that data to voltage, and
sends it to the PCM.
• When the left bank heated oxygen sensor (front)
begins to deteriorate, the heated oxygen sensor
signal response deteriorates also.
• The PCM varies the air/fuel mixture to make it
leaner and richer, and checks the response
speed of the left bank heated oxygen sensor
(front). In addition, the PCM also checks for an
open circuit in the left bank heated oxygen sensor
(front) output line.
.
DESCRIPTIONS OF MONITOR METHODS
Left bank heated oxygen sensor (front) circuit is
switched to 5 volts intentionally when oxygen
sensor output is low, and detects the malfunction
if the output voltage changes to equal or greater
than 4.5 volts. The above procedure is repeated
when oxygen sensor is inactive.
.
MONITOR EXECUTION
Continuous
.
AK200495
LEFT BANK
HEATED OXYGEN
SENSOR (FRONT)
A-09(GR)
AB
CONNECTOR: A-09
AK103912AB
CONNECTOR: C-71
C-71
AK103738AE
CONNECTORS: C-90, C-91
PCM
C-91(GR)
C-90(GR)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст