ECD SYSTEM, Diagnostic DTC:P0192, P0193

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

DESCRIPTION

The ECM monitors the internal fuel pressure of the common rail using the fuel pressure sensor, and controls the fuel quantity 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.

The measuring range of approx. 0.5 to 4.5 volts corresponds to a rail pressure of between 0 kPa (0 bar) and 180 MPa (1800 bar).

A004TOEE01

For information on the fuel system, refer to System Description Click here.

DTC No. DTC Detection Condition Trouble Area
P0192

Fuel pressure sensor output voltage 0.131 V or less for 0.14 seconds

(1 trip detection logic)

  • Open or short in fuel pressure sensor circuit

  • Fuel pressure sensor

  • ECM
DTC No. DTC Detection Condition Trouble Area
P0193

Fuel pressure sensor output voltage 3.29 V or more for 0.14 seconds

(1 trip detection logic)

  • Open or short in fuel pressure sensor circuit

  • Fuel pressure sensor

  • ECM
Related Data List
DTC No. Data List

P0192

P0193

  • Target Common Rail Pressure

  • Common Rail Pressure

WIRING DIAGRAM

A004TSOE01
*a Fuel Pressure Sensor

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 (COMMON RAIL PRESSURE AND TARGET COMMON RAIL PRESSURE)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

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

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

      OK
      Common Rail Pressure is within 10000 kPa of Target Common Rail Pressure when the 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 and turn the GTS on.

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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

    8. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      DTC P0192 or P0193 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 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
      B104-2 (PCR1) - B91-101 (PC) Always Below 1 Ω
      B104-3 (VC1) - B91-54 (VCS) Always Below 1 Ω
      B104-1 (E1) - B91-102 (E2S) Always Below 1 Ω
      B104-2 (PCR1) or B91-101 (PC) - Body ground Always 10 kΩ or higher
      B104-3 (VC1) or B91-54 (VCS) - Body ground Always 10 kΩ or higher
      B104-1 (E1) or B91-102 (E2S) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (VC VOLTAGE)


    1. A004RFBE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to fuel pressure sensor)

      Disconnect the fuel pressure sensor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B104-3 (VC1) - B104-1 (E1) Ignition switch ON 4.5 to 5.5 V

    NG

    REPLACE ECM Click here

    OK

  5. REPLACE FUEL PRESSURE SENSOR


    1. Replace the fuel pressure sensor Click here.


    NEXT

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


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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

    8. Read the DTCs.

      Result
      Result Proceed to
      DTC P0192 or P0193 A
      No DTC output B

    B

    END

    A

  7. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  8. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

  9. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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

    8. Confirm that the DTC is not output again.


    NEXT

    END