Hyundai: Engine D4FA. Manual - part 76

DIESEL CONTROL SYSTEM

FLA -175

SCHEMATIC DIAGRAM

E1E39678

C127 ECTS

1

3

2

1

2

C101-1 terminal 58

Sensor signal

Water temp. gauge (Cluster)

Sensor ground

M09-3 terminal 2

3

C101-1 terminal 41

41. Sensor ground

58. Sensor signal

C101-1 ECM

C127 ECTS

Water temp. gauge (Cluster)

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

3

2

1

[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

EGNG012F

SIGNAL WAVEFORM AND DATA

E71310F8

Fig.1

Fig.1) ECTS output signal at 80

.The higher temperature rises, the lower signal voltage becomes.

EGNG012G

MONITOR SCANTOOL DATA

E7F78564

1.

Connect Scantool to Data Link Connector (DLC).

2.

Warm engine up to normal operating temperature.

3.

Turn "OFF" electrical devices and A/C.

4.

Monitor "ECTS" parameter on the Scantool.

FLA -176

FUEL SYSTEM

Specification : Current enigne coolant temperature is displayed.

Fig.1

Fig.1) Check if 1) incorrect value is displayed 2) coolant temperature is fixed at 80

 suddenly during driving 3)coolant temperature 

          is fixed at -10

 when turning IG KEY "ON". That coolant temperature is fixed at -10

or 80

 means failure of ECTS.

          To prevent overheat of engine due to ECTS , if ECTS fails, cooling fan operates continuously.

EGNG012H

TERMINAL AND CONNECTOR INSPECTION

E2FFBEAC

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 ".

SIGNAL CIRCUIT INSPECTION

E4F37CE1

1.

Check signal circuit voltage

1)

IG KEY "OFF", ENGINE "OFF".

2)

Disconnect ECTS connector.

DIESEL CONTROL SYSTEM

FLA -177

3)

IG KEY "ON".

4)

Measure the voltage of ECTS connector terminal 1.

Specification : 4.8V~5.1V

5)

Is the measured voltage within the specification?

YES

▶ Go to "Component Inspection".

NO

▶ Go to "2.Check short to ground in signal circuit" as follows.

2.

Check short to ground in signal circuit

1)

IG KEY "OFF", ENGINE "OFF".

2)

Disconnect ECTS connector and ECM connector.

3)

Check continuity between ECTS connector terminal 1 and chassis ground.

Specification : Discontinuity ( Infinite Ω )

4)

Is the measured resistance within the specification?

YES

▶ Go to "Component Inspection".

NO

▶ Repair short to ground in signal circuit and go to "Verification of Vehicle Repair".

COMPONENT INSPECTION

ECBD402D

1.

IG KEY "OFF", ENGINE "OFF".

2.

Disconnect ECTS connector.

3.

Measure resistance between ECTS terminal 1 and 3, referring to resistance characteristic table of specification of
General information.

Specification : Refer to Specification of General Information

FLA -178

FUEL SYSTEM

1

2

3

EGNG012I

4.

Is the measured resistance at certain temperature within the specified resisance range at the temperature?

YES

▶ Go to "Verification of Vehicle Repair".

NO

▶ Replace ECTS and go to "Verification of Vehicle Repair".

VERIFICATION OF VEHICLE REPAIR

E92C8D5A

After a repair, it is essential to verify that the fault is corrected.

1.

After connecting Scantool select "DIAGNOSTIC TROUBLE CODES(DTCs)" mode.

2.

Clear recorded DTC using Scantool.

3.

Drive the vehicle within DTC "Enable conditions" in "General information".

4.

After selecting "DIAGNOSTIC TROUBLE CODES(DTCs)" mode and check if DTC is recorded again.

5.

Are any DTCs recorded ?

YES

▶ Go to the DTC guide of recorded NO. in Scantool.

NO

▶ System operates within specification.