Hyundai Tucson: Engine Control System / Rail Pressure Sensor (RPS)

- 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.

1.In the engine control system, failure can be quickly diagnosed by using the diagnosis tool.

(1)Self diagnosis : Checking failure and code number (DTC).

(2)Current data : Checking the system input/output data state.

(3)Actuation test : Checking the system operation condition.

(4)Additional function : Controlling other features including system option setting and zero point adjustment.

1.Check the rail pressure sensor waveform using the diagnosis tool.

Specification : Refer to "DTC Diagnosis Guide"

1.Turn the ignition switch OFF and disconnect the battery negative (-) cable.

2. 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.

3.Remove the intake manifold.(Refer to Engine Mechanical System - "Intake Manifold")

4.Disconnect the rail pressure sensor connector (A).

5.Remove the rail pressure sensor (A).

Tightening Torque :29.4 - 34.3 N.m (3.0 - 3.5 kgf.m, 21.7 - 25.3 lb-ft)

• 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.

2.Reset the ECM adaptive values.