Hyundai Santa Fe (2006 year). Manual - part 395

FL -190

FUEL SYSTEM

DTC P0192 FUEL RAIL PRESS. SENSOR-LOW INPUT

COMPONENT LOCATION

E739C00E

RPS

LFIG249A

GENERAL DESCRIPTION

EEC13490

RPS(Rail Pressure Sensor), consists of piezzo electric element, measures rail pressure inside of common rail. ECM
determines optimum fuel injection quantity at specific engine condition based on RPS signal. RPS signal is also used as
rail pressure regualtor feed back signal in order to achieve optimum rail pressure at certain engine condition.

DTC DESCRIPTION

E67297D6

P0192 is set when RPS output voltage is below the minimum value of 0.254V for more than 0.2 sec.. This code is due to
the open in power circuit or the short to ground in signal circuit.

DTC DETECTING CONDITION

EB5D921E

Item

Detecting Condition

Possible Cause

DTC Strategy

• Voltage monitoring

Enable Conditions

• Engine running

Threshold Value

• Output sinal below minimum value (below 0.254V)

Diagnostic Time

• 0.2 sec.

Fuel cut

NO

EGR Off

NO

Fuel Limit

YES

Fail Safe

Check

Lamp

YES

• Rail press. Sensor value

fixed at 330bar

• RPS circuit
• RPS component

DTC TROUBLESHOOTING PROCEDURES

FL -191

SPECIFICATION

E0AA2EF8

4.8V

4.5V

Output

voltage

(V)

0.5V

0.2V

1800 bar

Pressure (bar)

0 bar

at idle : 1.3V (260bar)

EGNG010O

SCHEMATIC DIAGRAM

EB6FDAB0

RPS

C203

1

2

ECM C230-A (43)

Reference Voltage (+5V)

RPS Signal

ECM C230-A (28)

3

Sensor Signal

ECM C230-A (8)

ECM (C230-A)

RPS (C203)

 P

2

1

3

8 - GND

28 - Reference Voltage (+5V)

43 - RPS Signal

[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

SCMFL6124L

FL -192

FUEL SYSTEM

SIGNAL WAVEFORM AND DATA

E72D43DF

Fig.1

Fig.1) APS 1 and RPS signals are measured simultaneously.  
          This waveform shows the rise of RPS output voltage at rapid acceleration. 

RPS

APS1

LFIG251A

MONITOR SCANTOOL DATA

EE9EB2BC

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 "FUEL PRESSURE MEASURED", "INJ. PUMP REGULATOR","RAIL PRESS. REGULATOR1" parameter on
the Scantool.

SPECIFICATION :

Idle(without load)

Accelerating(stall test)

Diagnosis

FUEL PRESSURE

MEASURED

27 ± 5 Mpa

above 75 Mpa

press. increases

INJ. PUMP REGULATOR

34 ± 3%

38 ± 3%

duty increases

RAIL PRESS.

REGULATOR1

16 ± 3%

45 ± 3%

duty increases

DTC TROUBLESHOOTING PROCEDURES

FL -193

Fig.1

Fig.2

Fig.2) Fuel pressure and Fuel pressure regulator valve data at idle.
Fig.3) Fuel pressure and Rail pressure regulator valve data at idle.
Fig.4) Fuel pressure and Fuel pressure regulator valve data at acceleration.
Fig.5) Fuel pressure and Rail pressure regulator valve data at acceleration.

Fig.3

Fig.4

LFIG375A

NOTE

The waveform of fuel pressure regulator valve installed at high pressure pump(fuel detecting MPROP) shows 34 ±
3% duty at idle, duty rises to approx. 38% at acceleration to raise rail pressure.

The waveform of rail pressure regulator valve installed at common rail shows 16 ± 3% duty at idle, duty rises to
approx. 45% at acceleration to raise rail pressure.

TERMINAL AND CONNECTOR INSPECTION

E7C78F86

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.