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.
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