ECD SYSTEM (w/o DPF), 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 so that it reaches the target pressure. The pressure sensor is a semiconductor that varies electrical resistance when pressure is applied to its silicon chip. This sensor outputs a voltage in proportion to the internal fuel pressure.

A003AJOE05
P0087
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
After idling for 60 seconds, quickly increase engine speed to 2500 rpm repeatedly 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 assembly)

  • 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 assembly)

  • 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 assembly)

  • 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 assembly)

  • ECM

Tech Tips

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

Related Data List
DTC No. Data List
P0087
  • Common Rail Pressure

  • Target Common Rail Pressure

P0190
P0192
P0193

Tech Tips


  • Check Common Rail Pressure and compare it to Target Common Rail Pressure in the Data List by entering the following menus: Powertrain / Engine and ECT / Data List / Common Rail Pressure, Target Common Rail Pressure. Under stable conditions, the difference between Common Rail Pressure and Target Common Rail Pressure is 5000 kPa or less.

  • For more information on the fuel pressure sensor and common rail system, refer to 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 performed by fail-safe function

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


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

  • If DTC P0190, P0192 and/or P0193 is stored, "Common Rail Pressure" 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 ECM continues operating in fail-safe mode until the ignition switch is turned off.

WIRING DIAGRAM

A003ASHE38

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 which share terminal E2 as their ground are stored, check this ground circuit first.

  • 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. CHECK DTC OUTPUT


    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 / Trouble Codes.

    4. Read the DTCs.

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

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


    1. Disconnect the fuel pressure sensor connector.

    2. Disconnect the ECM connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D69-5 (PR) - D98-66 (PCR1) Always Below 1 Ω
      D69-2 (PR2) - D98-114 (PCR2) Always Below 1 Ω
      D69-1 (VCS) - D98-68 (VCS) Always Below 1 Ω
      D69-6 (VC) - D98-69 (VCM) Always Below 1 Ω
      D69-4 (E2) - D98-91 (E2M) Always Below 1 Ω
      D69-3 (E2S) - D98-67 (E2S) Always Below 1 Ω
      D69-5 (PR) or D98-66 (PCR1) - Body ground Always 10 kΩ or higher
      D69-2 (PR2) or D98-114 (PCR2) - Body ground Always 10 kΩ or higher
      D69-1 (VCS) or D98-68 (VCS) - Body ground Always 10 kΩ or higher
      D69-6 (VC) or D98-69 (VCM) - Body ground Always 10 kΩ or higher
      D69-4 (E2) or D98-91 (E2M) - Body ground Always 10 kΩ or higher
      D69-3 (E2S) or D98-67 (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)

    A003ICWE10
    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
      D69-6 (VC) - D69-4 (E2) Ignition switch ON 4.5 to 5.5 V
      D69-1 (VCS) - D69-3 (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 ASSEMBLY)


    1. Replace the common rail assembly 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 or 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. Let the engine idle for 60 seconds, and then quickly increase the engine speed to 2500 rpm repeatedly for 30 seconds.

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

    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 GTS 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 quickly increase the engine speed to 2500 rpm repeatedly for 30 seconds.

    6. Confirm that the DTC is not output again.

      Tech Tips

      Perform the following procedure using the GTS 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