Hyundai Santa Fe (2006 year). Manual - part 366

FL -74

FUEL SYSTEM

RAIL PRESSURE REGULATOR
VALVE

INSPECTION

EE7E3738

FUNCTION AND OPERATION PRINCIPLE

The Fuel Pressure Regulator Valve and the Rail Pressure
Regulator Valve are installed on high pressure pump and

common rail respectively. These valves control fuel inlet
(feed) from fuel tank via fuel filter and outlet (return) to fuel
tank of high pressure fuel circuit.
This system is called "Dual Fuel Pressure Control System"
and can precisely and quickly control the fuel pressure in
accordance with various engine conditions by controlling
the fuel inlet and outlet simultaneously.

Fuel Pressure

Regulator Valve

Rail Pressure Regulator Valve

EFQG114A

SPECIFICATION

Items

Specification

Coil Resistance (

Ω

)

3.42 ~ 3.78

Ω

[20

℃

(68

℉

)]

DIESEL CONTROL SYSTEM

FL -75

CIRCUIT DIAGRAM

RAIL PRESSURE REGULATOR VALVE

C277

1

2

ECM C230-A (34)

Battery Voltage (B+)

Valve Control

ECM C230-A (4)

[CIRCUIT DIAGRAM]

[HARNESS CONNECTORS]

[CONNECTION INFORMATION]

Terminal

Connected to

Function

ECM

C230-A

C230-K

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

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

2

1

34 - Valve Control

4 - Power Supply

ECM (C230-A)

RAIL PRESSURE 
REGULATOR VALVE(C277)

2

1

SCMFL6129L

SIGNAL WAVEFORM

Fig.1

Fig.2

Fig.1) Waveform of rail pressure regulator valve at idle. It shows approx. 17% duty( (-) duty ).
Fig.2) Waveform of rail pressure regulator valve as accelerating. Approx. 50% duty is outputted as engine load increases.
         ( When rail pressure increases as accelerating, rail pressure regulator valve duty(current) rises.)          

EFQG377A

COMPONENT INSPECTION

1.

Turn ignition switch OFF.

2.

Disconnect the rail pressure regulator valve connec-
tor.

3.

Measure resistance between terminal 1 and 2 of the
valve.

Specification: Refer to "SPECIFICATION".

FL -76

FUEL SYSTEM

ELECTRIC EGR CONTROL VALVE

INSPECTION

E0CD3D42

FUNCTION AND OPERATION PRINCIPLE

The Exhaust Gas Recirculation (EGR) system is used
to add the exhaust gas to intake air in order to reduce
an excess of air and the temperature in the combustion
chamber. The Electric EGR control valve is controlled by
ECM

’

s duty control signal depending on engine load

and the need of intake air and is operated by solenoid
valve not vacuum valve.

EEGR

SCMFL6006D

SPECIFICATION

Items

Specification

Coil Resistance (

Ω

)

7.3 ~ 8.3

Ω

[20

℃

(68

℉

)]

CIRCUIT DIAGRAM

EEGR

C231

2

1

ECM C230-A (59)

Battery Voltage (B+)

EEGR Control

Main Relay

[CIRCUIT DIAGRAM]

[HARNESS CONNECTORS]

[CONNECTION INFORMATION]

Terminal

Connected to

Function

ECM

C230-A

C230-K

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

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

59 - EEGR Control

ECM (C230-A)

EEGR(C231)

1

2

Main Relay

SCMFL6130L

DIESEL CONTROL SYSTEM

FL -77

SIGNAL WAVEFORM

Fig.1

Fig.2

Fig.1) Approx. 10% duty( (-)duty ) signal waveform of EEGR actuator (with EEGR valve closed) 
Fig.2) Approx. 40% duty( (-)duty ) signal waveform of EEGR actuator(with EEGR valve opened)

EFQG414A

COMPONENT INSPECTION

1.

Turn ignition switch OFF.

2.

Disconnect the electric EGR control valve connector.

3.

Measure resistance between terminal 1 and 2 of the
valve.

Specification: Refer to "SPECIFICATION".