Hyundai: Engine D4FA. Manual — part 142
DIESEL CONTROL SYSTEM
FLA -439
SCHEMATIC DIAGRAM
EC21A3A5
C147 Variable swirl control actuator
1
1
2
3
5
4
2
C101-1 terminal 60
MTR(+)
MTR(-)
C101-1 terminal 30
3
Power
C101-1 terminal 26
4
Feed back signal
C101-1 terminal 56
5
Feed back ground
C101-1 terminal 6
60. MTR(+)
30. MTR(-)
26. Power
56. Feed back signal
6. Feed back ground
C101-1 ECM
C147 Variable swirl control actuator
C101-2 ECM
C101-1 ECM
1
30 29
31
32
38
39
36
37
35
33
34
40
42 41
46 45 44 43
48 47
50 49
2
3
4
6
5
8
7
12 11 10 9
13
14
15
18 17
19
16
22
25
27 26
23
20
21
24
28
51
75 74
53 52
73
79 78 77 76
80
81
83 82
84
86 85
87
89 88
90
92 91
93
94
57
69 68
70
71
64
54
55
56
61
58
59
60
63 62
65
66
67
72
M
1
2
3
4
5
[CIRCUIT DIAGRAM]
[HARNESS CONNECTOR]
[CONNECTOR INFORMATION]
Terminal
Terminal
Connected to
Connected to
Function
1
2
4
3
6
5
8 7
12
13
16
17
18
23 22
20
21
19
27 26 25 24
28
29
30
14
9
10
11
15
33 32 31
34
37
41
42
40 39 38
35
36
43
44
47 46
49 48
50
53
56
58 57
54
51
52
55
59
60
45
EGNG011G
FLA -440
FUEL SYSTEM
SIGNAL WAVEFORM AND DATA
E6192CFF
Swirl valve fully closed
Swirl valve fully opened
Fig.1
Fig.2
Fig.3
Fig. 1) Waveform when variable swirl valve closed at idle. Terminal 1 is (+) and 2 is (-).
Fig. 2) Waveform when variable swirl valve opened at above 3000RPM. Terminal 1 is (-) and 2 is (+).
Fig. 3) Waveform of variable swirl control actuator motor position sensor at the point of turning engine OFF.
4.3V at swirl valve closed and 0.3V at swirl valve opened. Swirl valve is opened and closed twice at engine "OFF".
EGNG011H
COMPONENT INSPECTION
E0C565F0
1.
Check variable swirl control actuator link device operation
1)
IG KEY "OFF", ENGINE "OFF".
2)
Wait for approx. 20 sec. and check Main relay turns "OFF".
3)
Disconnect variable swirl control actuator connector.
4)
Pressing variable swirl control actuator link with hands, check if shaft stuck, tightness or problem of link device
is detected.
Specification : variable swirl control actuator link device should move smoothly.
5)
Does variable swirl control actuator move slowly?
DIESEL CONTROL SYSTEM
FLA -441
YES
▶ Go to "2. Check motor coil resistance".
NO
▶ Replace stuck or too tight parts of component(intake manifold assy’ or swirl actuator) and go to "Verification
of Vehicle Repair".
2.
Check motor coil resistance
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect variable swirl control actuator.
3)
Measure the resistance between variable swirl control actuator component terminal 1 and 2.
Specification : 15.0 ± 3 Ω (20℃)
4
3
2
1
5
EGNG011K
4)
Is the measured resistance within the specification?
YES
▶ Go to "3. Check variable swirl control actuator position sensor resistance".
NO
▶ Replace variable swirl control actuator and go to "Verification of Vehicle Repair".
3.
Check variable swirl control actuator position sensor resistance
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect variable swirl control actuator.
3)
Measure the resistance of variable swirl control actuator component terminal 3,4,5 referring "Terminal resistance
table" as follows.
Specification : Terminal resistance table
FLA -442
FUEL SYSTEM
Resistance ( KΩ 20℃ )
Detecting
terminal
valve fully
opend
valve fully
closed
Characteristic
Component
connector
shape
3(power)-
5(ground)
4.47±0.1KΩ
4.47±0.1KΩ
stable
3(power)-
4(signal)
4.81±0.1KΩ
0.85±0.1KΩ
resistance drops
variable swirl
control actuator
position sensor
4(signal)-
5(ground)
0.75±0.1KΩ
4.71±0.1KΩ
resistance rises
4
3
2
1
5
EGNG011L
4)
Is the measured resistance within the specification?
YES
▶ Go to "4. Check motor operation" as follows.
NO
▶ Replace variable swirl control actuator assy’ and go to "Verification of Vehicle Repair".
4.
Check motor operation
1)
IG KEY "ON" , ENGINE "ON".
2)
Keep engine at idle state.
3)
Monitor the waveform of variable swirl control actuator terminal 1and 2 with two channel oscilloscope.
4)
Accelerating engine to above 3000RPM, let variable swirl control actuator be opened(operates).
Specification : Refer to Signal Waveform & Data "Fig.1)", " Fig.2)".
5)
Does variable swirl control actuator operate correctly?
YES
▶ Go to "5. Check variable swirl control actuator position sensor operation".
NO
▶ Replace variable swirl control actuator assy’ and go to "Verification of Vehicle Repair".
5.
Check variable swirl control actuator position sensor operation
1)
IG KEY "ON", ENGINE "ON".
2)
Keep engine at idle state.
3)
Monitor the waveform of variable swirl control actuator terminal 4 with oscilloscope.
4)
Turning off engine, monitor the waveform of variable swirl control actuator at the point of operation stop.
Specification : Refer to Signal Waveform & Data "Fig.3)"
5)
Does variable swirl control actuator and position sensor operations are OK?
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