Hyundai: Engine D4FA. Manual — part 100
DIESEL CONTROL SYSTEM
FLA -271
DTC P0489 EXHAUST GAS RECIRCULATION CONTROL CIRCUIT LOW
VOLTAGE
COMPONENT LOCATION
E5327A73
Electric EGR control valve
EGNG004V
GENERAL DESCRIPTION
EED8163E
Receiving ECM signal, linear solenoid type electronic EGR actuator operates Electric EGR control valve directly.ECM
performs EGR system feed back control with the information of measured mass air flow (The role of MAFS in diesel
engine is different from gasoline engine. Fuel injection quantity is decided by MAFS signal in gasoline engine.)When EGR
gas(contains no oxygen) flowing into combustion chamber increases, the air passing through MAFS(contains oxygen)
decreases. Thus, with the output signal change of MAFS accompanied by Electric EGR control valve actuation, ECM
determine the amount of recirculated EGR gas quantity.
NOTE
NOx is produced from the reaction of nitrogen and oxygen. Controlling EGR gas(contains no oxyger) which is recir-
culated to combustion chamber, if least intake air required for complete combustion flows into combustion chamber,
NOx decreases because there is no supplementary oxygen to react with nitrogen.
EGNG004W
FLA -272
FUEL SYSTEM
DTC DESCRIPTION
E1F52904
P0489 is set when ’0’A is detected in Electric EGR control valve circuit for more than 0.5 sec.. This code is due to open
or short to ground in Electric EGR control valve circuit or internal open in Electric EGR control valve component.
DTC DETECTING CONDITION
E295D65E
Item
Detecting Condition
Possible Cause
DTC Strategy
• Signal monitoring
Enable Conditions
• Engine run
ThresholdValue
• short to GND, wiring open
DiagnosticTime
• 500ms
Fuel Cut
NO
EGR Off
YES
Fuel Limit
NO
Fail Safe
MIL
YES
• Electric EGR control
valve circuit
• Electric EGR control valve
component
SPECIFICATION
E1119B59
Electric EGR control vavle
component resistance
Electric EGR control vavle
operating Hz
Electric EGR control vavle
operating duty
14.7 ~ 16.1Ω (20℃)
142Hz
5%(closed)~39%(opened)
SCHEMATIC DIAGRAM
EDA5ED22
1
1
2
2
C101-1 terminal 59 Electric EGR control valve control
15A Main relay power
C142 J/C terminal 7
59. Electric EGR control
valve control
15A INJ FUSE (Main relay power)
C101-1 ECM
C137 Electric EGR control valve
C137 Electric EGR control valve
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
1
2
[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
EGNG004X
DIESEL CONTROL SYSTEM
FLA -273
SIGNAL WAVEFORM AND DATA
E620352D
Fig.1
Fig.2
Fig.1) Approx. 6% duty signal waveform of Electric EGR control valve (with EEGR valve closed)
Fig.2) Approx. 40% duty signal waveform of Electric EGR control valve(with EEGR valve opened)
EGNG004Y
NOTE
The output of approx. 6% duty is mainly for the diagnosis of Electric EGR control valve circuit than actuating EEGR.
MONITOR SCANTOOL DATA
E22F4AD7
1.
Connect scantool to Data Link Cable. (DLC)
2.
Warm engine up to normal operating temperature.
3.
Turn "OFF" electrical devices and A/C.
4.
Monitor "AIR MASS PERCYLINDER" parameter on the Scantool.
Specification : When Electric EGR control valve does not operate 6% duty) at idle : 340mg/st ± 50 mg/st
When Electric EGR control valve operates(Approx. 50% duty) at idle : 200ms/st ± 50 mg/st
FLA -274
FUEL SYSTEM
Fig.1
Fig.2
Fig.1) Check if "AIR MASS PERCYLINDER"l is 340mg/st
50mg/st without EEGR operation at warm idle
(Electric EGR control valve 6% duty)
Fig.2) Check if "AIR MASS PERCYLINDER"l is 200mg/st 50mg/st with EEGR operation at warm idle
(Electric EGR control valve approx. 50% duty)
Electric EGR control valae operates as decelerating after rapid acceleration when idle EEGR does not operate, Electric
EGR control valve operating duty decreases as time goes by. This controlling process lasts for about 3 min. and Electric
EGR control valve turns "OFF" (duty 6% ) after 3 min..
EGNG012R
TERMINAL AND CONNECTOR INSPECTION
E7AA7A35
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 or
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 "Power Circuit Inspection".
POWER CIRCUIT INSPECTION
E244A549
1.
Check power circuit voltage
1)
IG KEY "OFF", ENGINE "OFF".
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