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".