Mitsubishi Lancer Evolution IX. Manual — part 421
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-159
STEP 7. Check harness between B-117 (terminal
No. 2) crank angle sensor connector and C-119
(terminal No. 43) engine-ECU connector.
• Check output line for short circuit.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair the damaged harness wire.
STEP 8. M.U.T.-II/III data list
• Refer to Data List Reference Table
.
a. Item No. 22: Crank angle sensor
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 9. Perform voltage measurement at B-117
crank angle sensor connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: "ON"
• Voltage between terminal No. 3 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Go to Step 10 .
AK305020
1
2
3
AB
Connector : B-117
Harness side
connector
B-117(B)
Crank angle sensor
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>
AK305020
1
2
3
AB
Connector : B-117
Harness side
connector
B-117(B)
Crank angle sensor
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-160
STEP 10. Connector check: B-12X engine control
relay connector
Q: Is the check result normal?
YES :
Check and repair harness between B-117
(terminal No. 3) crank angle sensor
connector and B-12X (terminal No. 4)
engine control relay connector.
• Check power supply line for
open/short circuit.
NO :
Repair or replace the connector.
STEP 11. Perform resistance measurement at
B-117 crank angle 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 14 .
NO :
Go to Step 12 .
AK305003
2
1
3
4
AB
Connector : B-12X
B-12X
Harness side
connector
Relay box’s
triangle marks
AK305020
1
2
3
AB
Connector : B-117
Harness side
connector
B-117(B)
Crank angle sensor
AK305020
1
2
3
AB
Connector : B-117
Harness side
connector
B-117(B)
Crank angle sensor
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-161
STEP 12. Connector check: C-121 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-117 (terminal
No. 1) crank angle sensor connector and C-121
(terminal No. 34) engine-ECU connector.
• Check earthing line for open circuit and damage.
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>
AK305020
1
2
3
AB
Connector : B-117
Harness side
connector
B-117(B)
Crank angle sensor
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-162
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair the damaged harness wire.
STEP 14. Perform output wave pattern
measurement at B-117 crank angle sensor
connector (Using an oscilloscope).
• Use special tool test harness (MD998478) 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 8 .
NO :
Go to Step 15 .
STEP 15. Connector check: B-12X engine control
relay connector
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Repair or replace the connector.
AK305020
1
2
3
AB
Connector : B-117
Harness side
connector
B-117(B)
Crank angle sensor
AK305003
2
1
3
4
AB
Connector : B-12X
B-12X
Harness side
connector
Relay box’s
triangle marks
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