Mitsubishi Lancer Evolution IX. Manual — part 391
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-39
STEP 10. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Repair or replace the connector.
STEP 11. Check harness between B-105 (terminal
No. 5) air flow sensor connector and C-119
(terminal No. 34) engine-ECU connector.
• Check earthing line for open circuit or damage.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair the damaged harness wire.
AK501994
65
43
50
42
49
41
48
60
61
64
46
47
58
59
67
68
45
56
66
52 51
44
53
62
54
63
57
55
AB
Connector: C-119
C-119 (GR)
C-119 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
AK305005
3
4
5
1
2
6
7
AB
Connector : B-105
Harness side
connector
B-105(B)
AK501994
65
43
50
42
49
41
48
60
61
64
46
47
58
59
67
68
45
56
66
52 51
44
53
62
54
63
57
55
AB
Connector: C-119
C-119 (GR)
C-119 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-40
STEP 12. Perform voltage measurement at B-105
air flow sensor connector.
• Use special tool test harness (MB991709) to con-
nect only terminal No. 1, No. 2 and No. 5, and
then measure at pick-up harness.
• Ignition switch: "ON"
• Voltage between terminal No. 1 and earth.
OK: 4.9
− 5.1 V
Q: Is the check result normal?
YES :
Go to Step 14 .
NO :
Go to Step 13 .
STEP 13. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Check and repair harness between B-105
(terminal No. 1) air flow sensor connector
and C-119 (terminal No. 42) engine-ECU
connector.
• Check power supply line for damage.
NO :
Repair or replace the connector.
AK305005
3
4
5
1
2
6
7
AB
Connector : B-105
Harness side
connector
B-105(B)
AK501994
65
43
50
42
49
41
48
60
61
64
46
47
58
59
67
68
45
56
66
52 51
44
53
62
54
63
57
55
AB
Connector: C-119
C-119 (GR)
C-119 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
AK305005
3
4
5
1
2
6
7
AB
Connector : B-105
Harness side
connector
B-105(B)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-41
STEP 14. Perform voltage measurement at B-105
air flow sensor connector.
• Use special tool test harness (MB991709) to con-
nect only terminal No. 1, No. 2 and No. 5, and
then measure at pick-up harness.
• Ignition switch: "ON"
• Voltage between terminal No. 5 and earth.
OK: 0.5 V or less
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Go to Step 15 .
STEP 15. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Check and repair harness between B-105
(terminal No. 5) air flow sensor connector
and C-119 (terminal No. 34) engine-ECU
connector.
• Check earthing line for damage.
NO :
Repair or replace the connector.
AK305005
3
4
5
1
2
6
7
AB
Connector : B-105
Harness side
connector
B-105(B)
AK501994
65
43
50
42
49
41
48
60
61
64
46
47
58
59
67
68
45
56
66
52 51
44
53
62
54
63
57
55
AB
Connector: C-119
C-119 (GR)
C-119 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
AK305005
3
4
5
1
2
6
7
AB
Connector : B-105
Harness side
connector
B-105(B)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-42
STEP 16. Perform voltage measurement at B-105
air flow sensor connector.
• Use special tool test harness (MB991709) to con-
nect only terminal No. 1, No. 2 and No. 5, and
then measure at pick-up harness.
• Ignition switch: "ON"
• Voltage between terminal No. 2 and earth.
OK:
Altitude 0 m: 3.8
− 4.2 V
Altitude 600 m: 3.5
− 3.9 V
Altitude 1,200 m: 3.3
− 3.7 V
Altitude 1,800 m: 3.0
− 3.4 V
Q: Is the check result normal?
YES :
Go to Step 19 .
NO :
Go to Step 17 .
STEP 17. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 18 .
NO :
Repair or replace the connector.
AK305005
3
4
5
1
2
6
7
AB
Connector : B-105
Harness side
connector
B-105(B)
AK501994
65
43
50
42
49
41
48
60
61
64
46
47
58
59
67
68
45
56
66
52 51
44
53
62
54
63
57
55
AB
Connector: C-119
C-119 (GR)
C-119 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
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