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Home >> Lexus >> 2017 >> LS 460 L, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (P0010-P0230) >> SFI System >> DTC P0192: Fuel Rail Pressure Sensor Circuit Low Input; DTC P0193: Fuel Rail Pressure Sensor Circuit High Input [09/2015 - ] >> Procedure
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DTC P0192: Fuel Rail Pressure Sensor Circuit Low Input; DTC P0193: Fuel Rail Pressure Sensor Circuit High Input [09/2015 - ]: Procedure

  1. READ VALUE USING TECHSTREAM (FUEL PRESSURE) 
    1. Connect the Techstream to the DLC3.
    2. Start the engine.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Fuel Press.
    5. Read the values.

      Pressure

      4000 to 13000 kPa (40.8 to 132.6 kgf/cm2 , 580 to 1885 psi).

      RESULT:

      Fuel Pressure (kPa) Proceed to
      19600 kPa (199.9 kgf/cm2 , 2842 psi) or more A
      Approximately 0.0 B
      OK [4000 to 13000 kPa (40.8 to 132.6 kgf/cm2 , 580 to 1885 psi)] * C

      HINT: 

      *: The value must change when the engine is running or stopped.

    Result:  B

    B 

    See step  3

    Result:  C

    C 

    CHECK FOR INTERMITTENT PROBLEMS 

    (Refer to CHECK FOR INTERMITTENT PROBLEMS [09/2015 - ] )

    Result:  A

    A 

    See step  2

  2. INSPECT ECM (VC VOLTAGE) 
    1. Disconnect the H17 fuel pressure sensor connector.
      GTY668118Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the engine switch on (IG).
    3. Measure the voltage between the terminals of the fuel pressure sensor connector.

      Standard voltage

      Tester Connection Switch Condition Specified Condition
      H17-1 (VC) - H17-3 (E2) Engine switch on (IG) 4.5 to 5.5 V

    Result:  NG

    NG 

    See step  4

    Result:  OK

    OK 

    See step  3

  3. INSPECT FUEL DELIVERY PIPE SUB-ASSEMBLY LH (FUEL PRESSURE SENSOR) 
    1. Inspect the fuel pressure sensor (Refer to INSPECTION [09/2015 - ] ).

    Result:  NG

    NG 

    REPLACE FUEL DELIVERY PIPE SUB-ASSEMBLY LH (FUEL PRESSURE SENSOR) 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  OK

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM) 
    1. Disconnect the H17 fuel pressure sensor connector.
      GTY636912Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the E1 and E3 ECM connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)

      Tester Connection Condition Specified Condition
      H17-1 (VC) - E1-18 (VC) Always Below 1 Ω
      H17-2 (PR) - E3-27 (PR) Always Below 1 Ω
      H17-3 (E2) - E1-28 (E2) Always Below 1 Ω

      Standard resistance (Check for short)

      Tester Connection Condition Specified Condition
      H17-1 (VC) or E1-18 (VC) - Body ground Always 10 kΩ or higher
      H17-2 (PR) or E3-27 (PR) - Body ground Always 10 kΩ or higher

    Result:  OK

    OK 

    REPLACE ECM 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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