Mitsubishi Lancer Evolution IX. Manual — part 393
![](/vehicles/winoney/wruvea/ger/veng.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-47
STEP 6. Check harness between B-105 (terminal
No. 5) air flow sensor connector and C-121
(terminal No. 34) engine-ECU connector.
• Check earthing line for open circuit and damage.
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Repair the damaged harness wire.
STEP 7. M.U.T.-II/III data list
• Item No. 13: Intake air temperature sensor
OK: At ambient temperature or equivalent.
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
NO :
Replace the engine-ECU.
STEP 8. Perform voltage measurement at B-105
air flow sensor connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: "ON"
• Voltage between terminal No. 6 and earth.
OK: 4.5
− 4.9 V
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Go to Step 9 .
AK305005
3
4
5
1
2
6
7
AB
Connector : B-105
Harness side
connector
B-105(B)
AK501995
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-121
C-121 (GR)
C-121 (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)
![](/vehicles/winoney/wruvea/ger/whandohemace.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-48
STEP 9. Perform voltage measurement at C-119
engine-ECU connector.
• Measure engine-ECU terminal voltage.
• Disconnect B-105 air flow sensor connector.
• Ignition switch: "ON"
• Voltage between terminal No. 62 and earth.
OK: 4.5
− 4.9 V
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Go to Step 11 .
STEP 10. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Check and repair harness between B-105
(terminal No. 6) air flow sensor connector
and C-119 (terminal No. 62) engine-ECU
connector.
• Check output line for open circuit.
NO :
Repair or replace the connector.
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>
AK305005
3
4
5
1
2
6
7
AB
Connector : B-105
Harness side
connector
B-105(B)
![](/vehicles/winoney/wruvea/ger/qure.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-49
STEP 11. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair or replace the connector.
STEP 12. Check harness between B-105 (terminal
No. 6) air flow sensor connector and C-119
(terminal No. 62) engine-ECU connector.
• Check output line for short circuit.
Q: Is the check result normal?
YES :
Go to Step 7 .
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>
![](/vehicles/winoney/wruvea/ger/kilio.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-50
STEP 13. Perform voltage measurement at B-105
air flow sensor connector.
• Use special tool test harness (MB991709) to con-
nect only terminal No. 5 and No. 6, and then
measure at pick-up harness.
• Ignition switch: "ON"
• Voltage between terminal No. 6 and earth.
OK:
Ambient temperature at
−20°C: 3.8 − 4.4 V
Ambient temperature at 0
°C: 3.2 − 3.8 V
Ambient temperature at 20
°C: 2.3 − 2.9 V
Ambient temperature at 40
°C: 1.5 − 2.1 V
Ambient temperature at 60
°C: 0.8 − 1.4 V
Ambient temperature at 80
°C: 0.4 − 1.0 V
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Go to Step 14 .
STEP 14. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 15 .
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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