Mitsubishi Montero Sport (2004+). Manual — part 200
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-213
STEP 5. Check the right bank heated oxygen sensor
(front).
(1) Disconnect the right bank heated oxygen sensor (front)
connector A-07 and connect test harness special tool,
MD998464 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 (front) 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
8 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.1
(red clip of special tool) and the terminal No. 3 (blue clip of
special tool) of the oxygen sensor with a (+) terminal and (-)
terminal of 8 volts power supply respectively, then check
again.
Q: Is the voltage between 0.6 and 1.0 volt?
YES : Go to Step 6.
NO : Replace the right bank heated oxygen sensor (front).
Then go to Step 13.
AK200490
1
2
3
4
A-07(B)
AB
CONNECTOR: A-07
HARNESS
CONNECTOR:
COMPONENT SIDE
RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)
AKX01624
HEATED
OXYGEN
SENSOR
COMPONENT
SIDE
CONNECTOR
MD998464
WHITE
BLACK
AL
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-214
STEP 6. Check connector A-04 at injector intermediate
connector for damage.
Q: Is the connector in good condition?
YES : Go to Step 7.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 13.
STEP 7. Check the right bank injector resistance at
intermediate connector A-04.
(1) Disconnect the injector intermediate connector A-04.
(2) Measure the resistance between each injector side
connector terminal.
a. Measure the resistance between terminal No. 3 and No.
8 when measuring No. 1 cylinder.
b. Measure the resistance between terminal No. 1 and No.
8 when measuring No. 3 cylinder.
c. Measure the resistance between terminal No. 6 and No.
8 when measuring No. 5 cylinder.
• Resistance should be between 13 and 16 ohms [at 20°C
(68
° F)].
Q: Is the resistance normal?
YES : Go to Step 10.
NO : Go to Step 8.
AK200014
7
2 1
6 5
4 3
8
CONNECTOR: A-04
AB
FEMALE SIDE
CONNECTOR
A-04(B)
AK200014
7
2 1
6 5
4 3
8
CONNECTOR: A-04
AB
FEMALE SIDE
CONNECTOR
A-04(B)
AK000452
6
3 4
7 8
1 2
5
INJECTOR
INTERMEDIATE
CONNECTOR
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-215
STEP 8. Check connector A-73, A-74, A-75 at right bank
injector for damage.
(1) Remove the intake manifold.
(2) Check the right bank injector connector, which deviates
from the standard value at Step 7.
Q: Is the connector in good condition?
YES : Go to Step 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 13.
STEP 9. Check the right bank injector.
(1) Check the right bank injector connector, which deviates
from the standard value at Step 7.
(2) Measure the resistance between injector side connector
terminal No. 1 and No. 2.
Standard value: 13
− 16 ohms [at 20°C (68°F)]
Q: Is the resistance between 13 and 16 ohms [at 20
°C
(68
°F)]?
YES : Repair harness wire between injector intermediate
connector and right bank injector connector because
of harness damage. Then go to Step 13.
NO : Replace the injector. Then go to Step 13.
AK200015
1
2
AB
CONNECTORS: A-73, A-74, A-75
A-73(GR)
A-74(GR)
A-75(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK200015
1
2
AB
CONNECTORS: A-73, A-74, A-75
A-73(GR)
A-74(GR)
A-75(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK000456
1 2
INJECTOR SIDE
CONNECTOR
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-216
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 13.
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
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