СИСТЕМА SFI, Diagnostic DTC:P0190, P0192, P0193

DTC Code DTC Name
P0190 Fuel Rail Pressure Sensor Circuit
P0192 Fuel Rail Pressure Sensor Circuit Low Input
P0193 Fuel Rail Pressure Sensor Circuit High Input

DESCRIPTION

A01MY1DE05

The fuel pressure sensor is installed on the delivery pipe. The fuel pressure sensor changes the fuel pressure into an electrical signal and sends the signal to the ECM. Then the ECM controls the pump discharge using this feedback to maintain the fuel's target pressure between 4 and 13 MPa (40.8 and 132.6 kgf/cm2, 580 and 1886 psi). If the sensor output stops, the ECM will stop the fuel pump (for high pressure side) and supply fuel using the fuel pump (for low pressure side).

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0190 Fuel Rail Pressure Sensor Circuit Open or short in fuel pressure sensor circuit for 5 seconds or more (1 trip detection logic)

  • Open or short in fuel pressure sensor circuit

  • Fuel delivery pipe sub-assembly (fuel pressure sensor)

  • ECM

 Comes on DTC stored
P0192 Fuel Rail Pressure Sensor Circuit Low Input Open or short in fuel pressure sensor circuit for 5 seconds or more (1 trip detection logic)

  • Open or short in fuel pressure sensor circuit

  • Fuel delivery pipe sub-assembly (fuel pressure sensor)

  • ECM

 Comes on DTC stored
P0193 Fuel Rail Pressure Sensor Circuit High Input Open or short in fuel pressure sensor circuit for 5 seconds or more (1 trip detection logic)

  • Open or short in fuel pressure sensor circuit

  • Fuel delivery pipe sub-assembly (fuel pressure sensor)

  • ECM

 Comes on DTC stored

Tech Tips

After confirming DTC P0190, P0192 and/or P0193 use the GTS to confirm the fuel pressure in the delivery pipe by entering the following menus: Powertrain / Engine / Data List / All Data / Fuel Press.

Fuel Pressure (kPag) Malfunction
Approximately 0

  • PR, E2 circuit short

  • VC circuit open
Approximately 19600 or higher

  • PR, VC circuit short

  • PR circuit open

  • E2 circuit open

MONITOR DESCRIPTION

These DTCs are stored if the fuel pressure sensor output voltage is out of the standard range due to an open or short in the sensor circuit.

MONITOR STRATEGY

Required Sensors/Components Fuel pressure sensor
Frequency of Operation Continuous

TYPICAL MALFUNCTION THRESHOLDS

P0190
Fuel rail pressure sensor voltage Less than 0.25 V, or higher than 4.5 V
P0192
Fuel rail pressure sensor voltage Less than 0.25 V
P0193
Fuel rail pressure sensor voltage Higher than 4.5 V

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the engine switch off and wait for at least 30 seconds.

  5. Turn the engine switch on (IG) and turn the GTS on.

  6. Wait 3 seconds or more.

  7. Start the engine.

  8. Idle the engine for 10 seconds [A].

  9. Enter the following menus: Powertrain / Engine / Trouble Codes.

  10. Read the pending DTCs [B].

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  12. Input the DTC: P0190, P0192 or P0193.

  13. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform steps [A] and [B] again.

WIRING DIAGRAM

A01MYCWE03
*a Fuel Pressure Sensor

CAUTION / NOTICE / HINT

Tech Tips


  • If other DTCs relating to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.

  • Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. READ VALUE USING GTS (FUEL PRESS)


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / Gas General / Fuel Press.


      Powertrain > Engine > Data List
      Tester Display
      Fuel Press

    5. Read the values.

      OK
      3500 to 4500 kPag (idling, warmed up engine).
      Result
      Fuel Pressure (kPag) Proceed to
      Approximately 19600 or higher A
      Approximately 0
      (3500 to 4500)* B

      Tech Tips

      *: The value must change when the engine is moving or stationary.


    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  2. INSPECT FUEL DELIVERY PIPE SUB-ASSEMBLY (FUEL PRESSURE SENSOR) (VC VOLTAGE)


    1. A01MU7LC05
      *a

      Front view of wire harness connector

      (to Fuel Pressure Sensor)

      Disconnect the fuel pressure sensor connector.

    2. Turn the engine switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      F45-3 (VC) - Body ground Engine switch on (IG) 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (ECM - FUEL PRESSURE SENSOR) Click here

    OK

  3. INSPECT FUEL DELIVERY PIPE SUB-ASSEMBLY (FUEL PRESSURE SENSOR)


    1. Inspect the fuel pressure sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUEL DELIVERY PIPE SUB-ASSEMBLY (FUEL PRESSURE SENSOR) Click here

    OK

  4. INSPECT ECM (PR VOLTAGE)


    1. A01MU8RC01
      *a

      Component with harness connected

      (ECM)

      Start the engine.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      F4-27 (PR) - F1-28 (E2) Idling with warm engine 1.0 to 1.7 V

      Tech Tips

      The fuel pressure in the delivery pipe is 3.5 to 4.5 MPa.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

  5. CHECK HARNESS AND CONNECTOR (ECM - FUEL PRESSURE SENSOR)


    1. Disconnect the ECM connectors.

    2. Disconnect the fuel pressure sensor connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F4-27 (PR) - F45-2 (PR) Always Below 1 Ω
      F1-28 (E2) - F45-1 (E2) Always Below 1 Ω
      F4-27 (PR) or F45-2 (PR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FUEL DELIVERY PIPE SUB-ASSEMBLY (FUEL PRESSURE SENSOR) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. CHECK HARNESS AND CONNECTOR (ECM - FUEL PRESSURE SENSOR)


    1. Disconnect the fuel pressure sensor connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F1-18 (VC) - F45-3 (VC) Always Below 1 Ω
      F1-18 (VC) or F45-3 (VC) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR