Mitsubishi Colt Ralliart. Manual — part 684
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-61
STEP 5. Check for leakage of exhaust emission
from exhaust manifold.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair for leakage of exhaust emission from
exhaust manifold.
STEP 6. Check throttle body (throttle valve
portion) for contamination.
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Clean throttle body (throttle valve portion)
(Refer to
).
STEP 7. Connector check: A-122 oxygen sensor
(front) connector, A-114 engine-ECU connector.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair or replace the connector.
STEP 8. Check A-122 oxygen sensor (front) itself.
• Check oxygen sensor (front) itself (Refer to
).
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Replace the oxygen sensor (front).
AK402087
Connector: A-122
Harness side
connector
A-122(G)
AC
Oxygen sensor
AK402745
6
4
2
5
3
1
9
7
8
10
11
12
13
14
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50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
AF
A-114
Connector:
A-114
Harness side connector
Engine-ECU
Battery
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-62
STEP 9. Check harness between A-122 (terminal
No. 1) oxygen sensor (front) connector and A-114
(terminal No. 34) engine-ECU connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Repair the damaged harness wire.
STEP 10. Connector check: Injector connector
a. A-102 (No.1 injector connector)
b. A-103 (No.2 injector connector)
c. A-104 (No.3 injector connector)
d. A-105 (No.4 injector connector)
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Repair or replace the connector.
STEP 11. Check injector itself.
• Check Injector itself (Refer to
).
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Replace the injector.
AK402087
Connector: A-122
Harness side
connector
A-122(G)
AC
Oxygen sensor
AK402745
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
AF
A-114
Connector:
A-114
Harness side connector
Engine-ECU
Battery
AK600602
M
1
2
AB
A-102 (G)
A-103 (G)
A-105 (G)
A-104 (G)
Connector: A-102, A-103, A-104, A-105
Harness side
connector
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-63
STEP 12. Connector check: B-106 engine control
relay connector and A-114 engine-ECU
connector.
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Repair or replace the connector.
STEP 13. Check harness between B-106 engine
control relay connector and injector connector.
a. Check harness between B-106 (terminal No. 4)
engine control relay connector and A-102 (termi-
nal No. 1) No. 1 injector connector.
b. Check harness between B-106 (terminal No. 4)
engine control relay connector and A-103 (termi-
nal No. 1) No. 2 injector connector.
c. Check harness between B-106 (terminal No. 4)
engine control relay connector and A-104 (termi-
nal No. 1) No. 3 injector connector.
d. Check harness between B-106 (terminal No. 4)
engine control relay connector and A-105 (termi-
nal No. 1) No. 4 injector connector.
NOTE: Before checking harness, check intermediate
connectors B-112 and repair if necessary.
• Check power supply line for damage.
3
2
1
4
AK402084
J/B side
connector
B-106
Connector: B-106
J/B (front side)
AC
AK402745
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
AF
A-114
Connector:
A-114
Harness side connector
Engine-ECU
Battery
3
2
1
4
AK402084
J/B side
connector
B-106
Connector: B-106
J/B (front side)
AC
AK600602
M
1
2
AB
A-102 (G)
A-103 (G)
A-105 (G)
A-104 (G)
Connector: A-102, A-103, A-104, A-105
Harness side
connector
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-64
Q: Are the check results normal?
YES :
Go to Step 14 .
NO :
Repair the damaged harness wire.
STEP 14. Check harness between injector
connector and A-114 engine-ECU connector.
a. Check harness between A-102 (terminal No. 2)
No. 1 injector connector and A-114 (terminal No.
8) engine-ECU connector.
b. Check harness between A-103 (terminal No. 2)
No. 2 injector connector and A-114 (terminal No.
9) engine-ECU connector.
c. Check harness between A-104 (terminal No. 2)
No. 3 injector connector and A-114 (terminal No.
23) engine-ECU connector.
d. Check harness between A-105 (terminal No. 2)
No. 4 injector connector and A-114 (terminal No.
24) engine-ECU connector.
• Check earthing line for damage.
Q: Are the check results normal?
YES :
Go to Step 15 .
NO :
Repair the damaged harness wire.
STEP 15. Fuel pressure measurement.
• Fuel pressure measurement (Refer to Fuel Pres-
sure Test
Q: Is the check result normal?
YES :
Replace engine-ECU.
NO :
Repair the fuel pressure.
AK600602
M
1
2
AB
A-102 (G)
A-103 (G)
A-105 (G)
A-104 (G)
Connector: A-102, A-103, A-104, A-105
Harness side
connector
AK402745
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
AF
A-114
Connector:
A-114
Harness side connector
Engine-ECU
Battery
Main
Index
Group
TOC
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