Hyundai: Engine D4FA. Manual — part 160
DIESEL CONTROL SYSTEM
FLA -511
DTC U0001 CAN COMMUNICATION MALFUNCTION
COMPONENT LOCATION
EB9C381B
ECM
EGNG014G
GENERAL DESCRIPTION
E6EC6484
Several control units are applied to electronically controlled vehicles. These units perform each control with informations
from various sensors. Thus, sharing signal information from sensors is needed, so CAN communication type whose com-
munication speed is high and insensitive to electrical noise by spark generation is adopted to controlling power-train(en-
gine, atutomatic transaxle, ABS, TCS, ECS)As sharing signals of engine speed, APS, engaged gear and torque reduction
through CAN communication, ECM and TCM modules control vehicle actively.
CAN 2.0 B communication format
NO. in box
means
scale
STANDARD ID
EXTENDED
ID
EGNG014H
DTC DESCRIPTION
EBAB6371
U0001 is set when signal transmission through CAN communication line is impossible for more than 0.1 sec. because of
open or short to ground in CAN communication line. Checking CAN communication BUS and signals from ECM, TCM
module is required.
FLA -512
FUEL SYSTEM
DTC DETECTING CONDITION
E5460F8E
Item
Detecting Condition
Possible Cause
DTC Strategy
• Signal monitoring
Enable Conditions
• IG KEY "ON"
ThresholdValue
• CAN BUS error
DiagnosticTime
• 100ms
Fuel Cut
NO
EGR Off
NO
Fuel Limit
NO
Fail Safe
MIL
NO
• CAN BUS
• CAN communication module
component
SPECIFICATION
E49E97B9
DIGITAL "0"
DIGITAL "1"( BUS IDLE )
CAN Communication Line
Resistance
Communica-
tion Format
HIGH
LOW
HIGH
LOW
Inside of ECM
Inside of
In-pannel
junction box
CAN 2.0B
3.5V
1.5V
2.5V
2.5V
120Ω (20℃)
120Ω (20℃)
DIESEL CONTROL SYSTEM
FLA -513
SCHEMATIC DIAGRAM
E3150397
84
83
I/P-E terminal 17
E16 terminal 9
E152 terminal 38
M33 terminal 3
I/P-E terminal 18
E16 terminal 17
E152 terminal 36
M33 terminal 11
CAN HIGH
CAN LOW
E16 Multipurpose
Check Connector
M33 Data Link Connector
CAN HIGH
CAN LOW
C101-2 ECM
I/P JUNTION BOX
CAN HIGH 9
CAN LOW 17
E152 TCM
CAN vertical
resistance (120 )
CAN vertical
resistance (120 )
3 CAN HIGH
11 CAN LOW
17
9
84
83
I/P-E
I/P-N
18
18
CAN HIGH 38
CAN LOW 36
M33 Data Link Connector
E16 Multipurpose Check Connector
E152 TCM
4
6
* *
*
11
9
2
3
5
1
12
13
*
*
*
5
*
*
*
9
*
*
*
*
*
*
12
*
*
*
*
17
18
19
*
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
4
5
24
23
21 22
20
19
62
61
59
58
78
74
53
52
44
17 18
38
36 37
14
12
10
9
8
7
6
1
2
3
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
* *
*
* *
* *
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
[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
EGNG014I
FLA -514
FUEL SYSTEM
SIGNAL WAVEFORM AND DATA
EE8CCCD8
Fig.1
Fig.1) CAN communication waveform
Monitoring CAN HIGH and LOW simultaneously is important in monitoring CAN communication waveform. When CAN HIGH
signal rise to 3.5V and LOW signal drops to 1.5V - voltage difference between HIGH and LOW signal is 2V - at BUS IDLE state
(DIGITAL "1") whose reference voltage is 2.5V, "0" is recognized. Besides, comparing HIGH and LOW signal if opposite waveform
is detected with the reference voltage of 2.5V, Check if current cam signal transfers correctly.
Continuous "0"signal above 6BIT means the occurence of error in CAN communication.
1BIT is easily distinguished as calculating the time when "SOF"(START OF FRAME) which notifies the start of frame occurs.
Check if "0"signal above 6BIT is detected continuously when monitoring CAN communication waveform.
CAN HIGH signal
CAN LOW signal
SOF Bit
Digital "0"
Digital "1"
BUS IDLE
EGNG014J
TERMINAL AND CONNECTOR INSPECTION
E57F8AD7
1.
Electrical systems consist of a lot of harness and connectors, poor connection of terminals can cause various prob-
lems and damge of component.
2.
Perform checking procedure as follows.
1)
Check damage of harness and terminals : Check terminals for contact resistance, corrosion and deformation.
2)
Check connecting condition of ECM and component connector : Check terminal seperation, damage of locking
device and connecting condition between terminal and wiring.
NOTE
Disconnect the pin which requires checking at male connector and insert it to the terminal at female connector for
checking connecting condition. ( after checking, reconnect the pin at correct position. )
3.
Is the problem found?
YES
▶ Repair the trouble causing part and go to "Verification of Vehicle Repair".
NO
▶ Go to "Signal Circuit Inspection".
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