Mitsubishi Lancer Evolution IX. Manual — part 424
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-171
STEP 10. Perform resistance measurement at
B-106 exhaust 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-106 (terminal
No. 1) 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.
AK501999
1
2
3
AB
Connector: B-106
B-106 (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>
AK501999
1
2
3
AB
Connector: B-106
B-106 (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>
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-172
STEP 13. Perform output wave pattern
measurement at B-106 exhaust 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-106 (terminal
No. 3) exhaust 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.
AK501999
1
2
3
AB
Connector: B-106
B-106 (B)
Harness side
connector
AK305003
2
1
3
4
AB
Connector : B-12X
B-12X
Harness side
connector
Relay box’s
triangle marks
AK501999
1
2
3
AB
Connector: B-106
B-106 (B)
Harness side
connector
AK305003
2
1
3
4
AB
Connector : B-12X
B-12X
Harness side
connector
Relay box’s
triangle marks
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-173
STEP 16. Connector check: C-119 and C-121
engine-ECU connectors
Q: Is the check result normal?
YES :
Go to Step 17 .
NO :
Repair or replace the connector.
STEP 17. Check harness between B-106 (terminal
No. 2) exhaust camshaft position sensor
connector and C-119 (terminal No. 50)
engine-ECU connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 18 .
NO :
Repair the damaged harness wire.
AK501998
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
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-119, C-121
C-119 (GR)
C-121 (GR)
C-119 (GR)
C-121 (GR)
C-121 Harness side connector
C-119 Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
AK501999
1
2
3
AB
Connector: B-106
B-106 (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>
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-174
STEP 18. Check harness between B-106 (terminal
No. 1) exhaust camshaft position sensor
connector and C-121 (terminal No. 34)
engine-ECU connector.
• Check earthing line for damage.
Q: Is the check result normal?
YES :
Go to Step 19 .
NO :
Repair the damaged harness wire.
STEP 19. Check the exhaust camshaft position
sensing cylinder.
Q: Is the check result normal?
YES :
Go to Step 20 .
NO :
Replace the exhaust camshaft position
sensing cylinder.
STEP 20. Check the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Replace the exhaust camshaft position
sensor.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
AK501999
1
2
3
AB
Connector: B-106
B-106 (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>
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