Mitsubishi Montero Sport (2004+). Manual — part 235
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-353
STEP 2. Check for short circuit to ground and harness
damage between left bank heated oxygen sensor (rear)
connector E-48 (terminal No. 4) and PCM connector C-91
(terminal No. 73).
NOTE: Check harness after checking intermediate connector
C-79 and E-45. If intermediate connector C-79 and E-45 is
damaged, repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 3.
Q: Is the harness wire in good condition?
YES : Go to Step 3.
NO : Repair it. Then go to Step 3.
AK200498
1
2
3
4
E-48(B)
AB
CONNECTOR: E-48
HARNESS
CONNECTOR:
COMPONENT SIDE
LEFT BANK
HEATED OXYGEN
SENSOR (REAR)
AK104028
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
CONNECTOR: C-91
C-91(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-354
STEP 3. 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 P0158 set?
YES : Repeat the troubleshooting.
NO : The procedure is complete.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-355
DTC P0159: Heated Oxygen Sensor Circuit Slow Response (bank 2, sensor 2)
AK303392
Left Bank Heated Oxygen Sensor (rear) Circuit
BL
ACK
BL
ACK
BL
ACK
BL
ACK
WHITE
BL
ACK
BL
ACK
BL
ACK
WHITE
WHITE
BL
ACK
-RED
BL
ACK
-RED
POWERTRAIN CONTROL MODULE (PCM)
1
10
15
2
11
3
12
4
13 14
5
16
6
17
7
18
8
19
9
20
E-44
73
57
19
5
16
10
12
8
2
7
4
2
3
1
C-91
C-90
FROM MFI RELAY
TO PCM
LEFT BANK HEATED
OXYGEN SENSOR (REAR)
1
10
15
2
11
3
12
4
13 14
5
16
6
17
7
18
8
19
9
20
E-45
E-45
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
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)
1 2
3 4
E-48
MU802605
6
10
2
7
8
3 4 5
9
11 12 13
1
C-79
MU801553
JOINT
CONNECTOR (4)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-356
.
AK200497
LEFT BANK
HEATED OXYGEN
SENSOR (REAR)
E-48(B)
AB
CONNECTOR: E-48
AK103738AE
CONNECTORS: C-90, C-91
PCM
C-91(GR)
C-90(GR)
AK200018 AB
CONNECTOR: E-44
E-44
AK103912AB
CONNECTOR: C-71
C-71
AK200018 AC
CONNECTOR: E-45
E-45(B)
AK103911AC
CONNECTOR: C-79
C-79
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