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ECD SYSTEM (for Swirl Control Valve), Diagnostic DTC:P0192, P0193

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

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
Table 1. Related Data List
DTC No. Data List

P0192

P0193

  • Target Common Rail Pressure

  • Common Rail Pressure
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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

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

Tip:

  • 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.

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PROCEDURE


  1. Click here

    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.

  2. Click here

    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.

      Table 2. Result
      Result Proceed to
      No DTC output A
      DTC P0192 or P0193 B

  3. Click here

    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
      C99-2 (PCR1) - C112-101 (PC) Always Below 1 Ω
      C99-3 (VC1) - C112-54 (VCS) Always Below 1 Ω
      C99-1 (E1) - C112-102 (E2S) Always Below 1 Ω
      C99-2 (PCR1) or C112-101 (PC) - Body ground Always 10 kΩ or higher
      C99-3 (VC1) or C112-54 (VCS) - Body ground Always 10 kΩ or higher
      C99-1 (E1) or C112-102 (E2S) - Body ground Always 10 kΩ or higher

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    CHECK HARNESS AND CONNECTOR (VC VOLTAGE)


    1. A01IRGPE01

      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
      C99-3 (VC1) - C99-1 (E1) Ignition switch ON 4.5 to 5.5 V
      Table 3. Text in Illustration
      *a

      Front view of wire harness connector

      (to fuel pressure sensor)

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    REPLACE FUEL PRESSURE SENSOR


    1. Replace the fuel pressure sensor (Click here).


  6. Click here

    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.

      Table 4. Result
      Result Proceed to
      DTC P0192 or P0193 A
      No DTC output B

  7. Click here

    REPLACE ECM


    1. Replace the ECM (Click here).


  8. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


  9. Click here

    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.


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    END

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    CHECK FOR INTERMITTENT PROBLEMSClick here