Mitsubishi Lancer Evolution IX. Manual — part 438
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-227
STEP 4. Connector check: B-12X engine control
relay connector
Q: Is the check result normal?
YES :
Check intermediate connector C-105, and
repair if necessary. If intermediate
connector is normal, check and repair
harness between B-123 (terminal No. 1) oil
feeder control valve connector and B-12X
(terminal No. 4) engine control relay
connector.
• Check power line for open/short
circuit.
NO :
Repair or replace the connector.
STEP 5. Perform voltage measurement at C-121
engine-ECU connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 32 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Go to Step 6 .
AK305003
2
1
3
4
AB
Connector : B-12X
B-12X
Harness side
connector
Relay box’s
triangle marks
AK502003
1
2
AB
Connector: B-123
B-123 (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-228
STEP 6. Connector check: C-121 engine-ECU
connector
Q: Is the check result normal?
YES :
Check and repair harness between B-123
(terminal No. 2) oil feeder control valve
connector and C-121 (terminal No. 32)
engine-ECU connector.
• Check output line for open/short
circuit.
NO :
Repair or replace the connector.
STEP 7. Connector check: C-121 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair or replace the 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>
AK502003
1
2
AB
Connector: B-123
B-123 (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-229
STEP 8. Check harness between B-123 (terminal
No. 2) oil feeder control valve connector and
C-121 (terminal No. 32) engine-ECU connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair the damaged harness wire.
STEP 9. Check harness between B-123 (terminal
No. 1) oil feeder control valve connector and
B-12X (terminal No. 4) engine control relay
connector.
NOTE: Before checking harness, check intermediate
connector C-105, and repair if necessary.
• Check power supply line for damage.
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Repair the damaged harness wire.
STEP 10. 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
).
AK502003
1
2
AB
Connector: B-123
B-123 (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>
AK502003
1
2
AB
Connector: B-123
B-123 (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-230
Code No. P1603: Battery Back-up Line System
OPERATION
• Power is directly supplied to the engine-ECU (ter-
minal No. 60) from the battery.
FUNCTION
• The engine-ECU is check the open circuit of bat-
tery back-up line.
TROUBLE JUDGMENT
Check Condition
• Ignition switch: "ON"
Judgment Criterion
• The battery back-up line voltage 6 V or less.
AK501823
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
8
20A
Battery
W
W
B-Y
R-B
60
Engine-ECU
Relay box
Battery back-up circuit
Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Gray
R: Red P: Pink V: Violet
Back-up
power supply
AB
6 <A-13> (*1) or
13 <C-31> (*2)
C-119
(MU803782)
NOTE
*1: L.H. drive vehicles
*2: R.H. drive vehicles
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст