Hyundai: Engine D4FA. Manual - part 91

 

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Hyundai: Engine D4FA. Manual - part 91

 

 

DIESEL CONTROL SYSTEM

FLA -235

DTC P0262 CYLINDER 1-INJECTOR CIRCUIT HIGH
DTC P0265 CYLINDER 2-INJECTOR CIRCUIT HIGH
DTC P0268 CYLINDER 3-INJECTOR CIRCUIT HIGH
DTC P0271 CYLINDER 4-INJECTOR CIRCUIT HIGH

COMPONENT LOCATION

E44F9928

EGNG008C

GENERAL DESCRIPTION

E8B438C7

Injectors spray fuel in the highly compressed combustion chamber, and power generates through combustion process.Fuel
pressure is raised to 1600bar in common rail diesel engine for the purpose of making fuel into minute particles. And fuel
devided into minute particles leads smoke reduction, high power generation, and improved fuel efficiency. To control
pressure of 1600bar with solenoid, oil pressure surbo is applied. And injector solenoids is actuated by solenoid oper-
ating voltage raised to 80V with the method of current control. Niddle valve inside of injector is located between A and
B chamber. If applied pressure to B chamber is relived by injector solenoid, niddle valve is raised by the pressure of A
chamber then, fuel is injected. If same pressure is applied to A and B chamber, niddle valve closes by the elasticity then,
fuel injection stops.As electronically controlled injector is applied instead of mechanical injector, pilot and post injection,
injeciton duration and quantity control are achieved. And engine performance is improved by these control.

 

ChamberB

ChamberA

niddle

spring

solenoid

B chamber press. 

Released

(injection performed)

B chamber press. 

loaded

(injection disabled)

returning fuel

EGNG008D

FLA -236

FUEL SYSTEM

DTC DESCRIPTION

EEE36708

P0262 is set when short between injector power circuit(High side) and control circuit(Low side), short to battery in control
circuit. This code is due to 1)the detection of over current from opened injector circuit or 2)short of coil inside of injector.

DTC DETECTING CONDITION

E60A3BBC

Item

Detecting Condition

Possible Cause

DTC Strategy

• Current monitoring

Enable Conditions

• IG KEY "ON"

ThresholdValue

• Short in injector circuit

DiagnosticTime

• Immediately

Fuel Cut

YES

EGR Off

NO

Fuel Limit

NO

Fail Safe

MIL

YES

• Short in injector circuit
• Injector component

SPECIFICATION

E6D4B7EA

Injector Component

Resistance

Injector Operating Voltage

Injector Operating

Current

Injector Control Type

0.255Ω ±0.04 (20℃).

80V

Peak current : 18±1A

Hold in current : 12±1A

Recharging current : 7A

Current control

DIESEL CONTROL SYSTEM

FLA -237

SCHEMATIC DIAGRAM

E01A823E

1

1

1

1

1

2

2

2

2

2

C101-1 terminal 16

Injector #1 Low side 

Injector #1 High side

C101-1 terminal 47

16. Injector #1 Low side

33. Injector #4 High side

47. Injector #1 High side

31. Injector #2 High side

46. Injector #3 High side

17. Injector #4 Low side

1. Injector #3 Low side

2. Injector #2 Low side

C101-1 ECM

C113-4 Injector #4

[C113-1 Injector #1]

1

2

C101-1 terminal 2

Injector #2 Low side

Injector #2 High side

C101-1 terminal 31

[C113-2 Injector #2]

1

2

C101-1 terminal 1

Injector #3 Low side

Injector #3 High side

C101-1 terminal 46

[C113-3 Injector #3]

1

2

C101-1 terminal 17

Injector #4 Low side

Injector #4 High side

C101-1 terminal 33

[C113-4 Injector #4]

C113-3 Injector #3

C113-2 njector #2

C113-1 Injector #1

1

2

C113-1 

Injector 

#1

1

2

C113-2 

Injector 

#2

1

2

C113-3 

Injector 

#3

1

2

C113-4 

Injector 

#4

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

[CIRCUIT DIAGRAM]

[HARNESS CONNECTOR]

[CONNECTOR INFORMATION]

Terminal

Terminal

Connected to

Connected to

Function

Terminal

Terminal

Connected to

Connected to

Function

Terminal

Terminal

Connected to

Connected to

Function

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

EGNG008E

FLA -238

FUEL SYSTEM

SIGNAL WAVEFORM AND DATA

E46BDD7E

Pilot injection1

Pilot injection2

Main injection

Injector current waveform

Fig.1

Fig.2

Fig.3

Fig.4

Fig.1) Injector operating waveform at Low side, It shows 2 pilot and 1 main injection. 
Fig.2) Magnified waveform of main injection at Fig.1)
Fig.3) Injector voltage and current waveforms are measured at the same time using current prove of scope meter.
Fig.4) Magnified waveform of pilot injection at Fig.3)

EGNG008F

TERMINAL AND CONNECTOR INSPECTION

EAC80A3D

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?

 

 

 

 

 

 

 

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