Mitsubishi Lancer Evolution IX. Manual — part 437
![](/vehicles/winoney/wruvea/ger/simerag.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-223
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-124 (terminal
No. 2) intake camshaft position sensor connector
and C-119 (terminal No. 53) 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>
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/xxthifitopev.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-224
STEP 18. 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 damage.
Q: Is the check result normal?
YES :
Go to Step 19 .
NO :
Repair the damaged harness wire.
STEP 19. Check the intake camshaft position
sensing cylinder.
Q: Is the check result normal?
YES :
Go to Step 20 .
NO :
Replace the intake camshaft position
sensing cylinder.
STEP 20. Check the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Replace the intake camshaft position
sensor.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
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/kerirutopimu.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-225
Code No. P1021: Oil Feeder Control Valve System
1
2
3
4
AK501822
1 2
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
3132 33
34 35
1
10
33
28
C-105
J/C (6)
AB
Engine
control
relay
R-Y
R-Y
P-B
B-12X
Oil feeder control
valve
1
2
4
1
2
32
3
Oil feeder control valve circuit
Battery
B-Y
B-Y
B-Y
C-121
(MU803784)
B-123
MU802779
Engine-ECU
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 PU: Purple
To engine-ECU
NOTE
*1: L.H. drive vehicles
*2: R.H. drive vehicles
6 <A-13> (*1) or
13 <C-31> (*2)
![](/vehicles/winoney/wruvea/ger/indery.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-226
OPERATION
• Power is supplied to the oil feeder control valve
(terminal No. 1) from the engine control relay (ter-
minal No. 4).
• The engine-ECU (terminal No. 32) makes the
power transistor in the unit be in ON position, and
that makes currents go on the oil feeder control
valve (terminal No. 2).
FUNCTION
• The oil feeder control valve controls the phase
angle of the intake camshaft by the signal from
the engine-ECU.
TROUBLE JUDGMENT
Check Condition
• The oil feeder control valve does not operate.
Judgment Criterion
• The oil feeder control valve drive terminal voltage
of the engine-ECU is not normal for 4 seconds or
more.
PROBABLE CAUSE
• Failed oil feeder control valve
• Open/short circuit in oil feeder control valve cir-
cuit or loose connector contact
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. Connector check: B-123 oil feeder
control valve connector
Q: Is the check result normal?
YES :
Go to Step 2 .
NO :
Repair or replace the connector.
STEP 2. Perform resistance measurement at
B-123 oil feeder control valve connector.
• Disconnect connector, and measure at control
valve side.
• Resistance between terminal No. 1 and No. 2.
OK: 6.9
− 7.9 Ω (at 20°C)
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Replace the oil feeder control valve.
STEP 3. Perform voltage measurement at B-123
oil feeder control valve connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 1 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Go to Step 4 .
AK502003
1
2
AB
Connector: B-123
B-123 (B)
Harness side
connector
AK502003
1
2
AB
Connector: B-123
B-123 (B)
Harness side
connector
AK502003
1
2
AB
Connector: B-123
B-123 (B)
Harness side
connector
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