Mitsubishi Montero Sport (2004+). Manual — part 225
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-313
STEP 10. Check connector C-90, C-91 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 14.
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-314
STEP 11. Check for harness damage between left bank
heated oxygen sensor (front) connector A-09 (terminal No.
4) and PCM connector C-91 (terminal No. 71).
Q: Is the harness wire in good condition?
YES : Go to Step 12.
NO : Repair it. Then go to Step 14.
AK200496
1
2
3
4
A-09(GR)
AB
CONNECTOR: A-09
HARNESS
CONNECTOR:
COMPONENT SIDE
LEFT BANK
HEATED OXYGEN
SENSOR (FRONT)
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-315
STEP 12. Check for harness damage between left bank
injector connector and PCM connector.
a. Check the harness wire between left bank injector connec-
tor A-72 (terminal No. 2) and PCM connector C-89 (terminal
No. 9) when checking No. 2 cylinder.
b. Check the harness wire between left bank injector connec-
tor A-71 (terminal No. 2) and PCM connector C-89 (terminal
No. 2) when checking No. 4 cylinder.
c. Check the harness wire between left bank injector connec-
tor A-70 (terminal No. 2) and PCM connector C-89 (terminal
No. 25) when checking No. 6 cylinder.
Q: Is the harness wire in good condition?
YES : Go to Step 13.
NO : Repair it. Then go to Step 14.
STEP 13. Check the fuel pressure.
Refer to On - Vehicle Service - Fuel Pressure Test
Q: Is the fuel pressure normal?
YES : Replace the PCM. Then go to Step 14.
NO : Repair it. Then go to Step 14.
STEP 14. 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 P0154 set?
YES : Repeat the troubleshooting.
NO : The procedure is complete.
AK200016
1
2
AB
CONNECTORS: A-70, A-71, A-72
A-70(GR)
A-71(GR)
A-72(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
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-316
DTC P0155: Heated Oxygen Sensor Heater Circuit (bank 2 sensor 1)
AK200185
Left Bank Heated Oxygen Sensor (front) Heater Circuit
RED
RED
WHITE-
BLA
CK
RED
WHITE-
BLA
CK
WHITE-
BLA
CK
POWERTRAIN CONTROL MODULE (PCM)
1
2
22
33
1
2
4
3
4
12
29
MFI
RELAY
LEFT BANK HEATED OXYGEN
SENSOR (FRONT)
FUSIBLE LINK (12)
TO PCM TO PCM
C-59
LIGHT GREEN-RED
3
3
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)
1 2
3 4
A-09
MU802665
JOINT
CONNECTOR (5)
1
2
3
4
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