Hyundai Palisade: Engine Control System / Rail Pressure Sensor (RPS)
Description and operation
Installed on the delivery pipe, the Rail Pressure Sensor (RPS) measures the
instantaneous fuel pressure in the delivery pipe. The sensing element (Semiconductor
element) built in the sensor converts the pressure to voltage signal. By using
this signal, the ECM can control correct injection amount and timing and adjust
the fuel pressure with the fuel pressure regulator valve if the target pressure
is different from the actual pressure calculated by the RPS output signal.

Specifications
▷ Type : Piezo-electricity type
Pressure
|
Output Voltage (V)
[Vref=5V]
|
bar
|
[MPa (kgf/cm², psi)]
|
0
|
0 (0, 0)
|
0.5
|
140
|
14 (142, 2031)
|
2.5
|
280
|
28 (286, 4061)
|
4.5
|

Troubleshooting

Schematic diagrams

Harness Connector

Repair procedures
1. |
Connect the diagnostic tool on the Data Link Connector (DLC).
|
2. |
Measure the output voltage of the RPS at idle and various engine speed.
Pressure
|
Output Voltage (V)
[Vref=5V]
|
bar
|
[MPa (kgf/cm², psi)]
|
0
|
0 (0, 0)
|
0.5
|
140
|
14 (142, 2031)
|
2.5
|
280
|
28 (286, 4061)
|
4.5
|
|
1. |
Release the residual pressure in fuel line.
(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel
Line")
|
2. |
Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
|
3. |
Remove the intake manifold.
(Refer to Engine Mechanical System - "Intake Manifold")
|
4. |
Disconnect the rail pressure sensor connector (A), and then remove the
sensor (B) from the delivery pipe.
Rail Pressure Sensor :
29.4 - 34.3 N.m (3.0 - 3.5 kgf.m, 21.7 - 25.3 lb-ft)
|

|
• |
Install the component to the specified torque.
|
• |
Note that internal damage may occur when the component is dropped.
If the component has been dropped, inspect before installing.
|
|
1. |
Install in the reverse order of removal.
|
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