СИСТЕМА ECD (для CCo), Diagnostic DTC:P0087, P0190, P0192, P0193

DTC Code DTC Name
P0087 Fuel Rail / System Pressure - Too Low
P0190 Fuel Rail Pressure Sensor Circuit
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.

A01IPPSE02
P0087
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
After idling for 60 seconds, repeat quick engine speed accelerations (to 2500 rpm) for 30 seconds

Fuel pressure sensor output voltage stays at fixed value for 90 seconds.

(1 trip detection logic)


  • Open or short in fuel pressure sensor circuit

  • Fuel pressure sensor (common rail)

  • Ran out of fuel

  • Fuel frozen

  • ECM

P0190
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 1 second

Fuel pressure sensor output voltage is 0.55 V or less, or 4.9 V or higher for 0.5 seconds.

(1 trip detection logic)


  • Open or short in fuel pressure sensor circuit

  • Fuel pressure sensor (common rail)

  • ECM

Tech Tips

Trouble areas are related to the electrical system only (pumps are not involved)

P0192
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 1 second

Fuel pressure sensor output voltage is 0.55 V or less for 0.5 seconds.

(1 trip detection logic)


  • Open or short in fuel pressure sensor circuit

  • Fuel pressure sensor (common rail)

  • ECM

Tech Tips

Trouble areas are related to the electrical system only (pumps are not involved)

P0193
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 1 second

Fuel pressure sensor output voltage is 4.9 V or higher for 0.5 seconds.

(1 trip detection logic)


  • Open or short in fuel pressure sensor circuit

  • Fuel pressure sensor (common rail)

  • ECM

Tech Tips

Trouble areas are related to the electrical system only (pumps are not involved)

Related Data List
DTC No. Data List
P0087
  • Fuel Press

  • Target Common Rail Pressure

P0190
P0192
P0193

Tech Tips


  • Check Fuel Press compared to Target Common Rail Pressure in the Data List by entering the following menus: Powertrain / Engine and ECT / Data List / Fuel Press, Target Common Rail Pressure. Under stable conditions, the difference between Fuel Press and Target Common Rail Pressure is within +/-5000 kPa.

  • For more information on the fuel pressure sensor and common rail system, refer to the System Description Click here.

  • If DTC P0087 is stored, the following symptoms may appear:


    • Black smoke

    • Poor drivability

    • Lack of power

    • Lack of power due to accelerator restriction of fail-safe function

  • If DTC P0190, P0192 and/or P0193 is stored, the following symptoms may appear.


    • Lack of power due to accelerator restriction of fail-safe function

  • If DTC P0190, P0192 and/or P0193 is stored, "Fuel Press" always displays 0 kPa or 200000 kPa.

MONITOR DESCRIPTION

P0087 (Fuel pressure sensor output stays at fixed value):
P0190, P0192 and P0193 (Open or short in fuel pressure sensor circuit):

These DTCs are stored if the fuel pressure sensor output voltage is out of the standard range due to an open or short malfunction of the sensor circuit.

If these DTCs are stored, the ECM enters fail-safe mode and limits the engine power. The fail-safe mode continues until the ignition switch is turned off.

WIRING DIAGRAM

A01IPCWE17

INSPECTION PROCEDURE

Note

After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

Tech Tips


  • If DTCs relating to different systems are stored and they share terminal E2 as their ground, check this ground circuit first.

  • Read freeze frame data using the intelligent tester. 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. CHECK DTC OUTPUT


    1. Connect the intelligent tester to the DLC3.

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

    3. Enter the following menus: Powertrain / Engine and ECT / DTC.

    4. Read the DTCs.

      Result
      Result Proceed to
      P0190, P0192, P0193 A
      P0087 B

    B
    A
  2. CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM)


    1. A01IR87E12
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Fuel Pressure Sensor)

      *b

      Front view of wire harness connector

      (to ECM)

      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 (Check for Open)
      Tester Connection Condition Specified Condition
      C55-5 (PR) - C69-66 (PCR1) Always Below 1 Ω
      C55-2 (PR2) - C69-114 (PCR2) Always Below 1 Ω
      C55-1 (VCS) - C69-69 (VCS) Always Below 1 Ω
      C55-6 (VC) - C69-68 (VCM) Always Below 1 Ω
      C55-4 (E2) - C69-67 (E2M) Always Below 1 Ω
      C55-3 (E2S) - C69-91 (E2S) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      C55-5 (PR) or C69-66 (PCR1) - Body ground Always 10 kΩ or higher
      C55-2 (PR2) or C69-114 (PCR2) - Body ground Always 10 kΩ or higher
      C55-1 (VCS) or C69-69 (VCS) - Body ground Always 10 kΩ or higher
      C55-6 (VC) or C69-68 (VCM) - Body ground Always 10 kΩ or higher
      C55-4 (E2) or C69-67 (E2M) - Body ground Always 10 kΩ or higher
      C55-3 (E2S) or C69-91 (E2S) - Body ground Always 10 kΩ or higher
    4. Reconnect the fuel pressure sensor connector.

    5. Reconnect the ECM connector.


    NG
    OK
  3. CHECK ECM (FUEL PRESSURE SENSOR VOLTAGE)

    A01IS5WE28
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Fuel Pressure Sensor)


    1. 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
      C55-6 (VC) - C55-4 (E2) Ignition switch ON 4.5 to 5.5 V
      C55-1 (VCS) - C55-3 (E2S) Ignition switch ON 4.5 to 5.5 V
    3. Reconnect the fuel pressure sensor connector.


    NG
    OK
  4. REPLACE FUEL PRESSURE SENSOR (COMMON RAIL)


    1. Replace the common rail Click here.


    NEXT
  5. BLEED AIR FROM FUEL SYSTEM


    1. Bleed the air from the fuel system Click here.


    NEXT
  6. CHECK WHETHER DTC OUTPUT RECURS (DTC P0087, P0190, P0192, P0193)


    1. Connect the intelligent tester to the DLC3.

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

    3. Clear the DTCs Click here.

    4. Let the engine idle for 60 seconds, and then repeat quick engine speed accelerations (to 2500 rpm) for 30 seconds.

    5. Enter the following menus: Powertrain / Engine and ECT / DTC.

    6. Read the DTCs.

      Result
      Result Proceed to
      P0087, P0190, P0192 or P0193 is output A
      No DTC is output B

    B
    A
  7. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT
  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 intelligent tester to the DLC3.

    2. Clear the DTCs Click here.

    3. Turn the ignition switch off for 30 seconds or more.

    4. Turn the ignition switch to ON.

    5. Let the engine idle for 60 seconds, and then repeat quick engine speed accelerations (to 2500 rpm) for 30 seconds.

    6. Confirm that the DTC is not output again.

      Tech Tips

      Perform the following procedure using the tester to determine whether or not the DTC judgment has been carried out.


      1. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

      2. Input DTC P0087, P0190, P0192 and/or P0193.

      3. Check that STATUS is NORMAL. If STATUS is INCOMPLETE or UNKNOWN, increase the idling time.


    NEXT