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Home >> Lexus >> 2011 >> LS 460 RWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0010-P0300) >> SFI System >> DTC P0190: Fuel Rail Pressure Sensor Circuit; DTC P0192: Fuel Rail Pressure Sensor Circuit Low Input; DTC P0193: Fuel Rail Pressure Sensor Circuit High Input >> Procedure
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DTC P0190: Fuel Rail Pressure Sensor Circuit; DTC P0192: Fuel Rail Pressure Sensor Circuit Low Input; DTC P0193: Fuel Rail Pressure Sensor Circuit High Input: 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
      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.

    B → See step   3 

    C → See step   7 

    A: Go to next step 

  2. INSPECT ECM (VC VOLTAGE) 
    1. Disconnect the H17 fuel pressure sensor connector.
      Fig 1: Identifying H17 Fuel Pressure Sensor Connector Terminals
      GTY147556Courtesy 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

    NG → See step   4 

    OK: Go to next step 

  3. INSPECT FUEL PRESSURE SENSOR 
    1. Inspect the fuel pressure sensor. Refer to INSPECTION .

    NG → See step   5 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM) 
    1. Disconnect the H17 fuel pressure sensor connector.
      Fig 2: Identifying Connector Terminal Of Fuel Pressure Sensor
      GTY288242Courtesy 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

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   6 

  5. REPLACE FUEL PRESSURE SENSOR. Refer to  REMOVAL 
  6. REPLACE ECM. Refer to  REMOVAL 
  7. CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS 
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