Hyundai: Engine D4FA. Manual - part 93

DIESEL CONTROL SYSTEM

FLA -243

SPECIFICATION

EEE6F4B2

Sensor Type

Output Signal
Characteristic

Air Gab

Low RPM Minimum

Detecting Voltage

High RPM Minimum

Detecting Voltage

Magnetic inductive

A/C waveform

1.8mm

230mV

2769 mV

SCHEMATIC DIAGRAM

E2C69115

1

1

2

2

3

3

C101-1 terminal 7

Sensor signal

Shield ground

Sensor signal

C101-1 terminal 12(A/T)

C101-1 terminal 27(M/T)

C101-1 terminal 27(A/T)

C101-1 terminal 12(M/T)

C101-1 ECM

C106 CKPS

27 Sensor signal(-) (A/T)
12 Sensor signal(-) (M/T)

M

12 Sensor signal(+) (A/T) 
27 Sensor signal(+) (M/T)

7. Shield ground

C106 CKPS

1

2

3

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

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

EGNG005T

FLA -244

FUEL SYSTEM

SIGNAL WAVEFORM AND DATA

E645DF76

Fig.1

Fig.2

Fig.1) This shows waveform of Crank Shaft Position Sensor and Cam Shaft Position Sensor simulatneously. 
          The middle area indicates reference points of Crank Shaft Position Sensor and Cam Shaft Position Sensor. 

Fig.2) Crank Shaft Position Sensor and Cam Shaft Position Sensor signal are measured simultaneously.  
          Cam Shaft Position Sensor signal is outputted once when Crank Shaft Position sensor signal is outputted twice. 
          LOW and HIGH output of Cam Shaft Position sensor reference point is detected at Crank Shaft Position sensor reference 
          point.
          ( Injection sequence is determined based on LOW and HIGH signal of Cam Shaft Position Sensor reference point as 
           detecting cylinder position.)              

EGNG005U

※ SIGNAL ANALYSIS

CKPS signal recognition below 1000RPM

CKPS signal recognition above 1000RPM

EGNG005V

1.

The output voltage of CKPS signal varies according to rpm(the speed of tone wheel passing by sensor)
( low voltage is inducted for low speed and high voltage is inducted for high speed. )

2.

CKPS should detect from low rpm at cranking to above 5000rpm. If minimum detecting voltage is set low for the ease
of signal detection at low rpm, 1) the abnormal signal at high rpm from which high voltage generates or 2) electrical
NOise through circuit can be recognized as Crank signal. Thus minimum detecting voltages at low rpm and high rpm
are set differently.

3.

ECM convert analog signal like the waveform illustrated above into digital signal with A/D converter.The voltage above
minimum detecting voltage of crank signal and "-"voltage below 0.0V is meaningless at converting process. RPM is
detected as Hz.(signal detecting period)

MONITOR SCANTOOL DATA

E716DA8B

1.

Connect Scantool to Data Link Connector (DLC).

DIESEL CONTROL SYSTEM

FLA -245

2.

Warm engine up to normal operating temperature.

3.

Turn "OFF" electrical devices and A/C.

4.

Monitor "ENGINE SPEED SENSOR" parameter on the Scantool.

Specification : 800±50RPM at idle

Fig.1) Check "ENGINE SPEED SENSOR" parameter carefully after warming engine up, also check engine stall and rpm instability 
          or engine shut down.

Fig.1

EGNG005M

TERMINAL AND CONNECTOR INSPECTION

EBF78CF9

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 "Signal Circuit Inspection ".

SIGNAL CIRCUIT INSPECTION

E93F7435

1.

Check signal circuit voltage

FLA -246

FUEL SYSTEM

1)

IG KEY "OFF", ENGINE "OFF".

2)

Disconnect CKPS connector.

3)

IG KEY "ON".

4)

Measure the voltage of CKPS connector terminal 2 and 3.

Specification : 2.4V~2.6V

5)

Is the measured voltage within the specification?

YES

▶ Go to "3.Check short between signal circuits."

NO

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

2.

Check open in signal circuit

1)

IG KEY "OFF", ENGINE "OFF".

2)

Disconnect CKPS connector and ECM connector.

3)

Check continuity between CKPS connector terminal 2 and ECM connector terminal 12(A/T),27(M/T).

4)

Check continuity between CKPS connector terminal 3 and ECM connector terminal 27(A/T),12(M/T).

Specification : continuity ( below 1.0Ω )

5)

Is the measured resistance within the specification?

YES

▶ Go to "3. Check short between signal circuits".

NO

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

3.

Check short between signal circuits

1)

IG KEY "OFF", ENGINE "OFF".

2)

Disconnect CKPS connector and ECM connector.

3)

Check continuity between CKPS connector terminal 2 and 3.

Specification : Discontinuity ( Infinite Ω )

4)

Is the measured resistance within the specification?

YES

▶ Go to "4. Check short to ground in signal circuit" as follows.