Mitsubishi Outlander (2003+). Manual — part 49
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-59
STEP 11. Connector check: B-17X engine control
relay connector and B-134 engine-ECU
connector.
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair.
STEP 12. Check harness between B-17X engine
control relay connector and injector connector.
a. Check harness between B-17X (terminal No. 1)
engine control relay connector and B-01 (terminal
No. 1) No. 1 injector connector.
b. Check harness between B-17X (terminal No. 1)
engine control relay connector and B-02 (terminal
No. 1) No. 2 injector connector.
c. Check harness between B-17X (terminal No. 1)
engine control relay connector and B-04 (terminal
No. 1) No. 3 injector connector.
d. Check harness between B-17X (terminal No. 1)
engine control relay connector and B-05 (terminal
No. 1) No. 4 injector connector.
Check power supply line for damage.
Q: Are the check results normal?
YES :
Go to Step 13 .
NO :
Repair
AK300255
2
1
3
4
Relay box’s
triangle marks
AB
CONNECTOR: B-17X
B-17X
Harness side
connector
AK300257
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13 12
23
24
25
26
21
3
10
11
AB
CONNECTOR: C-134
C-134
Harness side connector
AK300255
2
1
3
4
Relay box’s
triangle marks
AB
CONNECTOR: B-17X
B-17X
Harness side
connector
AK300265
M
1
2
Harness side connector
Connector: B-01, B-02, B-04, B-05
B-02 (GR)
AB
B-01 (GR) B-02 (GR) B-04 (GR) B-05 (GR)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-60
STEP 13. Check harness between injector
connector and C-134 engine-ECU connector.
a. Check harness between B-01 (terminal No. 2)
No. 1injector connector and C-134 (terminal No.
1) engine-ECU connector.
b. Check harness between B-02 (terminal No. 2)
No. 2 injector connector and C-134 (terminal No.
14) engine-ECU connector.
c. Check harness between B-04 (terminal No. 2)
No. 3 injector connector and C-134 (terminal No.
2) engine-ECU connector.
d. Check harness between B-05 (terminal No. 2)
No. 4 injector connector and C-134 (terminal No.
15) engine-ECU connector.
Q: Are the check results normal?
YES :
Go to Step 14 .
NO :
Repair
STEP 14. Measure fuel pressure.
Measure fuel pressure (Refer to
Q: Is the check result normal?
YES :
Repair.
NO :
Replace engine-ECU
AK300265
M
1
2
Harness side connector
Connector: B-01, B-02, B-04, B-05
B-02 (GR)
AB
B-01 (GR) B-02 (GR) B-04 (GR) B-05 (GR)
AK300257
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13 12
23
24
25
26
21
3
10
11
AB
CONNECTOR: C-134
C-134
Harness side connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-61
Code No. P0130: Oxygen Sensor (Front) System <sensor 1>
OPERATION
The sensor signal is inputted to the engine-ECU
(terminal No. 76) from the oxygen sensor output
terminal (terminal No. 4).
The oxygen sensor (terminal No. 2) is earthed
with engine-ECU (terminal No. 92).
FUNCTION
The oxygen sensor converts the concentration of
oxygen in the exhaust emission into a voltage
and inputs the signal to the engine-ECU.
When the air-fuel ratio is richer than the theoreti-
cal air-fuel ratio, the oxygen sensor outputs a volt-
age of about 1 V. When it is leaner than the
theoretical air-fuel ratio, it outputs a voltage of
about 0 V.
In response to the signal, the engine-ECU con-
trols the fuel infection amount so that the air-fuel
ratio can be equivalent to the theoretical air-fuel
ratio.
TROUBLE JUDGMENT
Check Condition
Above 3 minutes later after the engine has
started up.
The engine coolant temperature approximately
82
C or more.
The engine speed is 1,200 r/min or more.
The volumetric efficiency 25% or more.
The monitoring time is 5 seconds.
Judgment Criteria
When the oxygen sensor (front) output voltage is
0.2 V or less and a power voltage of 5 V is
applied to the oxygen sensor (front) in the
engine-ECU, the sensor output voltage is 4.5 V or
more.
Check Condition
The engine speed is 3,000 r/min or less.
During the air-fuel ratio feedback control
AK300266
1
2
3
4
82
78
81
80
89 90 9192
79
87
71
74
73
72
76
75
77
85
88
83 84
86
AB
B-112
(MU802605)
Engine-ECU
Oxygen sensor (front)
From Engine control relay
To engine-ECU
1
2
3
4
92
B
W
B
B
76
Oxygen sensor (front) circuit
2
1
J/C (2)
C-17
Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Gray
R: Red P: Pink V:Violet
C-137
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-62
Judgment Criteria
When the oxygen sensor (front) output frequency
is 6 or less for 10 seconds on the average.
PROBABLE CAUSE
Failed oxygen sensor
Open/short circuit in oxygen sensor (front) circuit
or loose connector contact
Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. MUT-II data list
Refer to Data list reference table
a. Item 11: Oxygen sensor (front)
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to GROUP
00
-
How to Use
Troubleshooting/Inspection Service Points
NO :
Go to Step 2 .
STEP 2. Connector check: B-112 oxygen sensor
(front) connector
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Repair.
STEP 3. Measure voltage at B-112 oxygen sensor
(front) connector.
Disconnect connector, and measure at harness
side.
Resistance between terminal No. 2 and earth.
OK: 2
W
or less
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Go to Step 4 .
STEP 4. Connector check: C-137 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Repair.
AK300264
1
2
3
4
AB
B-112 (B)
Harness side connector
Oxygen sensor (front)
Connector: B-112
AK300264
1
2
3
4
AB
B-112 (B)
Harness side connector
Oxygen sensor (front)
Connector: B-112
AK300254
82
78
8180
89
90
91
92
79
87
71
74 73 72
76 75
77
85
88
83
84
86
AB
CONNECTOR: C-137
C-137
Harness side connector
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