Mitsubishi Lancer Evolution IX. Manual — part 449
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-271
STEP 15. Check harness between C-121 (terminal
No. 8) engine-ECU connector and B-25 (terminal
No. 1) alternator connector.
NOTE: Before checking harness, check intermediate
connector B-14 and repair if necessary.
• Check output line for open/short circuit and dam-
age.
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Repair the damaged harness wire.
STEP 16. Perform voltage measurement at C-121
engine-ECU connector.
• Measure engine-ECU terminal voltage.
• Engine: Idling after warm-up
• Transmission: Neutral
• Radiator fan: Not operating
• Voltage between terminal No. 8 and earth.
OK: Switching the head lamps to ON from
OFF causes the voltage to fall.
Q: Is the check result normal?
YES :
Go to Step 20 .
NO :
Go to Step 17 .
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>
AK305036
M
2
1
3
4
Harness side
connector
AB
Connector : B-25
B-25(GR)
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-272
STEP 17. Connector check: C-119 engine-ECU
connector and B-25 alternator connector.
Q: Is the check result normal?
YES :
Go to Step 18 .
NO :
Repair or replace the connector.
STEP 18. Check harness between C-119 (terminal
No. 52) engine-ECU connector and B-25 (terminal
No. 4) alternator connector.
NOTE: Before checking harness, check intermediate
connector B-14, and repair if necessary.
• Check output line for open/short circuit and dam-
age.
Q: Is the check result normal?
YES :
Go to Step 19 .
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>
AK305036
M
2
1
3
4
Harness side
connector
AB
Connector : B-25
B-25(GR)
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>
AK305036
M
2
1
3
4
Harness side
connector
AB
Connector : B-25
B-25(GR)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-273
STEP 19. Check the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Replace the alternator.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
STEP 20. Perform voltage measure at C-119
engine-ECU connector.
• Measure engine-ECU terminal voltage.
• Engine: Idling
• A/C switch: ON (A/C compressor ON)
• Voltage between terminal No. 65 and earth.
OK:
1 V or less (with outside air temperature sen-
sor ambient temperature at 18
°C or higher
and A/C set for maximum air flow at mini-
mum temperature)
System voltage (with A/C set for minimum air
flow at room temperature)
Q: Is the check result normal?
YES :
Go to Step 21 .
NO :
Check A/C load signal system (Refer to
Inspection Procedure 29
STEP 21. Connector check: B-103 and B-114
ignition coil connectors.
Q: Is the check result normal?
YES :
Go to Step 22 .
NO :
Repair or replace the connector.
STEP 22. Check ignition coil spark.
Q: Is the check result normal?
YES :
Go to Step 27 .
NO :
Go to Step 23 .
STEP 23. Check spark plug.
Q: Is the check result normal?
YES :
Go to Step 24 .
NO :
Replace the spark plug.
STEP 24. Check spark plug cable.
• Check spark plug cable itself (Refer to GROUP
16
− Ignition System − On-vehicle Service
).
Q: Is the check result normal?
YES :
Go to Step 25 .
NO :
Replace the spark plug cable.
STEP 25. Check ignition coil itself.
• Check ignition coil itself (Refer to GROUP 16 −
Ignition System
Q: Is the check result normal?
YES :
Go to Step 26 .
NO :
Replace the ignition coil.
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>
AK305047
1
2
3
Connector : B-103, B-114
B-114(GR)
B-103(GR)
AB
Harness side
connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-274
STEP 26. Check harness between ignition coil
connector terminal No. 2 of each cylinder and
body earth.
• Check earthing line for open/short circuit and
damage.
Q: Is the check result normal?
YES :
Check and repair harness between ignition
coil connector terminal No. 3 of each
cylinder and C-121 engine-ECU.
• Check signal line for open/short and
damage.
NO :
Repair the damaged harness wire.
STEP 27. Check injector for spray condition.
• Check each injector for spray condition (Refer to
).
Q: Is the check result normal?
YES :
Go to Step 28 .
NO :
Replace the injector.
STEP 28. Check compression pressure.
• Check compression pressure (Refer to GROUP
11A
− On-vehicle Service
).
Q: Is the check result normal?
YES :
Go to Step 29 .
NO :
Repair.
STEP 29. Check purge control solenoid valve
itself.
• Check purge control solenoid valve itself (Refer
to GROUP 17
− Emission Control System −
Evaporative Emission Control System
).
Q: Is the check result normal?
YES :
Go to Step 30 .
NO :
Replace the purge control solenoid valve.
STEP 30. Check EGR control solenoid valve
itself.
• Check EGR control solenoid valve itself (Refer to
GROUP 17
− Emission Control System −
Exhaust Gas Recirculation (EGR) System
).
Q: Is the check result normal?
YES :
Go to Step 31 .
NO :
Replace the EGR control solenoid valve.
STEP 31. Check EGR valve itself.
• Check EGR valve itself (Refer to GROUP 17 −
Emission Control System
− Exhaust Gas Recir-
culation (EGR) System
).
Q: Is the check result normal?
YES :
Go to Step 32 .
NO :
Replace the EGR valve.
STEP 32. M.U.T.-II/III actuator test
• Item No. 07: Fuel pump
OK: Operating sounds of fuel pump can be
heard.
Q: Is the check result normal?
YES :
Go to Step 33 .
NO :
Check fuel pump system (Refer to
inspection Procedure 24
AK305047
1
2
3
Connector : B-103, B-114
B-114(GR)
B-103(GR)
AB
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>
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст