Mitsubishi Lancer Evolution IX. Manual — part 436
![](/vehicles/winoney/wruvea/ger/siarshu.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-219
STEP 5. Perform voltage measurement at C-119
engine-ECU connector.
• Measure engine-ECU terminal voltage.
• Disconnect B-124 intake camshaft position sen-
sor connector.
• Ignition switch: "ON"
• Voltage between terminal No. 53 and earth.
OK: 4.9
− 5.1 V
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Go to Step 7 .
STEP 6. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Check and repair harness between B-124
(terminal No. 2) intake camshaft position
sensor connector and C-119 (terminal No.
53) engine-ECU connector.
• Check output line for open circuit.
NO :
Repair or replace the connector.
AK501994
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52 51
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53
62
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57
55
AB
Connector: C-119
C-119 (GR)
C-119 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
AK502002
1
2
3
AB
Connector: B-124
B-124 (B)
Harness side
connector
AK501994
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52 51
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53
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57
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AB
Connector: C-119
C-119 (GR)
C-119 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
AK502002
1
2
3
AB
Connector: B-124
B-124 (B)
Harness side
connector
![](/vehicles/winoney/wruvea/ger/jerryondiost.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-220
STEP 7. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair or replace the connector.
STEP 8. Check harness between B-124 (terminal
No. 2) intake camshaft position sensor connector
and C-119 (terminal No. 53) engine-ECU
connector.
• Check output line for short circuit.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair the damaged harness wire.
STEP 9. Check the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Replace the engine-ECU.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
AK501994
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61
64
46
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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>
AK502002
1
2
3
AB
Connector: B-124
B-124 (B)
Harness side
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>
![](/vehicles/winoney/wruvea/ger/cellos.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-221
STEP 10. Perform resistance measurement at
B-124 intake camshaft position sensor
connector.
• Disconnect connector, and measure at harness
side.
• Resistance between terminal No. 1 and earth.
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Go to Step 11 .
STEP 11. Connector check: C-121 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-124 (terminal
No. 1) intake camshaft position 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 9 .
NO :
Repair the damaged harness wire.
AK502002
1
2
3
AB
Connector: B-124
B-124 (B)
Harness side
connector
AK501995
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3
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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>
AK502002
1
2
3
AB
Connector: B-124
B-124 (B)
Harness side
connector
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>
![](/vehicles/winoney/wruvea/ger/our.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-222
STEP 13. Perform output wave pattern
measurement at B-124 intake camshaft position
sensor connector (Using an oscilloscope).
• Use special tool test harness (MB991709) to con-
nect connector, and measure at pick-up harness.
• Engine: Idling
• Transmission: Neutral
• Voltage between terminal No. 2 and earth.
OK: Waveforms should be displayed on
Inspection procedure using an oscilloscope
(Refer to
), its maximum value
should be 4.8 V or more, and its minimum
value should be 0.6 V or less with no noise in
waveform.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Go to Step 14 .
STEP 14. Connector check: B-12X engine control
relay connector.
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Repair or replace the connector.
STEP 15. Check harness between B-124 (terminal
No. 3) intake camshaft position sensor connector
and B-12X (terminal No. 4) engine control relay
connector.
• Check power supply line for damage.
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Repair the damaged harness wire.
AK502002
1
2
3
AB
Connector: B-124
B-124 (B)
Harness side
connector
AK305003
2
1
3
4
AB
Connector : B-12X
B-12X
Harness side
connector
Relay box’s
triangle marks
AK502002
1
2
3
AB
Connector: B-124
B-124 (B)
Harness side
connector
AK305003
2
1
3
4
AB
Connector : B-12X
B-12X
Harness side
connector
Relay box’s
triangle marks
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