Hyundai i-30: Engine Control System / Rail Pressure Sensor (RPS)

Hyundai i30 (PD) 2018-2024 Service Manual / Engine Control / Fuel System / Engine Control System / Rail Pressure Sensor (RPS)

Description and operation
Description
Rail Pressure Sensor (RPS) is installed on the delivery pipe and 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 adjusts the fuel pressure with the fuel pressure regulator valve if the target pressure and the actual pressure calculated by the RPS output signal are different.

Specifications
Specification

Schematic diagrams
Circuit Diagram

Harness Connector

Repair procedures
Inspection
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.
Condition
Output Voltage (V)
Idle
 Approx. 1.2
1,500 rpm
2.0 - 2.2
6,300 rpm
 Approx. 2.8

Removal
1.
Release the residual pressure in fuel line.
(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")
  
When removing the fuel pump relay, a Diagnostic Trouble Code (DTC) may occur. Delete the code with the diagnostic tool after completion of "Release Residual Pressure in Fuel Line" work.
2.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
3.
Remove the intake manifold
(Refer to Engine Mechanical System - "Intake Manifold")
4.
Disconnect the rail pressure sensor connector, and then remove the sensor (A) from the delivery pipe.
Tightening Torque :
29.4 - 34.3 N.m (3.0 - 3.5 kgf.m, 21.7 - 25.3 lb-ft)

Installation
  
Install the component with the specified torques.
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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