ECD SYSTEM(w/ DPF), Diagnostic DTC:P0192, P0193

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

DESCRIPTION

The ECM monitors the internal fuel pressure of the common rail using the fuel pressure sensor, and controls the suction control valve to regulate the internal pressure to the target pressure. The pressure sensor is a semiconductor that varies electrical resistance when pressure is applied to its silicon chip.

This sensor outputs the voltage in proportion to the internal fuel pressure.

P0192
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 5 seconds

Fuel pressure sensor output voltage 0.189 V or less for 0.5 seconds

(1 trip detection logic)

  • Open or short in fuel pressure sensor (common rail assembly) circuit

  • Fuel pressure sensor (common rail assembly)

  • ECM
P0193
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 5 seconds

Fuel pressure sensor output voltage 4.8 V or higher for 0.5 seconds

(1 trip detection logic)

  • Open or short in fuel pressure sensor circuit (common rail assembly)

  • Fuel pressure sensor (common rail assembly)

  • ECM
Related Data List
DTC No. Data List
P0192

  • Target Common Rail Pressure

  • Common Rail Pressure
P0193

Tech Tips


  • If DTC P0192 or P0193 is stored, the following symptoms may appear:


    • Lack of power

  • When DTC P0192 or P0193 is stored, check the internal fuel pressure of the common rail by entering the following menus on the GTS: Powertrain / Engine and ECT / Data List / Common Rail Pressure and Target Common Rail Pressure.

  • Under a stable operating condition such as idling, Common Rail Pressure is within +/-10000 kPa of Target Common Rail Pressure.

WIRING DIAGRAM

A01VL1EE05

CAUTION / NOTICE / HINT

Note

When replacing the ECM, the ECM needs Registration and Initialization Click here.

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. READ VALUE USING GTS (TARGET COMMON RAIL PRESSURE AND COMMON RAIL PRESSURE)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Target Common Rail Pressure and Common Rail Pressure.

    5. Check that the internal fuel pressure of the common rail is within the specification below.

      Standard
      Common Rail Pressure is within +/-10000 kPa of Target Common Rail Pressure when engine is idling and running at 3000 rpm without load.

    NG

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

    OK

  2. CHECK WHETHER DTC OUTPUT RECURS (DTC P0192, P0193)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Turn the ignition switch off and wait for 30 seconds or more.

    6. Turn the ignition switch to ON and wait for 5 seconds or more.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    8. Read the DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P0192 or P0193 is output B

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE ECM Click here

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


    1. Disconnect the B34 fuel pressure sensor connector.

    2. Disconnect the B104 ECM connector (for LHD).

    3. Disconnect the B103 ECM connector (for RHD).

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      B34-2 (PCR1) - B104-85 (PC) Always Below 1 Ω
      B34-3 (VC1) - B104-70 (VCS) Always Below 1 Ω
      B34-1 (E1) - B104-117 (E2S) Always Below 1 Ω
      B34-2 (PCR1) or B104-85 (PC) - Body ground Always 10 kΩ or higher
      B34-3 (VC1) or B104-70 (VCS) - Body ground Always 10 kΩ or higher
      B34-1 (E1) or B104-117 (E2S) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      B34-2 (PCR1) - B103-85 (PC) Always Below 1 Ω
      B34-3 (VC1) - B103-70 (VCS) Always Below 1 Ω
      B34-1 (E1) - B103-117 (E2S) Always Below 1 Ω
      B34-2 (PCR1) or B103-85 (PC) - Body ground Always 10 kΩ or higher
      B34-3 (VC1) or B103-70 (VCS) - Body ground Always 10 kΩ or higher
      B34-1 (E1) or B103-117 (E2S) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  4. CHECK TERMINAL VOLTAGE (VC VOLTAGE)


    1. A01VE71E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Fuel Pressure Sensor)

      Disconnect the fuel pressure sensor connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B34-3 (VC1) - B34-1 (E1) Ignition switch ON 4.5 to 5.5 V

    NG

    REPLACE ECM Click here

    OK

  5. REPLACE COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR)


    1. Replace the common rail assembly Click here.


    NEXT

  6. BLEED AIR FROM FUEL SYSTEM


    1. Bleed air from fuel system Click here.


    NEXT

  7. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Turn the ignition switch off and wait for 30 seconds or more.

    6. Turn the ignition switch to ON and wait for 5 seconds or more.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    8. Read the DTCs.

      Result
      Result Proceed to
      DTC P0192 or P0193 is output A
      DTC is not output B

    B

    END

    A

  8. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  9. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

  10. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Turn the ignition switch off and wait for 30 seconds.

    6. Turn the ignition switch to ON and wait for 5 seconds or more.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    8. Confirm that the DTC is not output again.


    NEXT

    END