СИСТЕМА ECD, 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 applying pressure to its silicon chip. This sensor outputs the voltage in proportion to the internal fuel pressure.

B007UHJE01
DTC No. DTC Detection Condition Trouble Area
P0087 Fuel pressure sensor output voltage stays at fixed value (1 trip detection logic)

  • Open or short in fuel pressure sensor circuit

  • Fuel pressure sensor

  • ECM
P0190 Fuel pressure sensor output voltage is 0.55 V or less, or 4.9 V or more for 0.5 seconds (1 trip detection logic)

  • Open or short in fuel pressure sensor circuit

  • Fuel pressure sensor

  • ECM
P0192 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

  • ECM
P0193 Fuel pressure sensor output voltage is 4.9 V or more for 0.5 seconds (1 trip detection logic)

  • Open or short in fuel pressure sensor circuit

  • Fuel pressure sensor

  • ECM

Tech Tips


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

  • If P0087, P0190, P0192 and/or P0193 is present, refer to the "Diagnostics Trouble Codes (DTCs) Table for Common Rail System" Click here.

  • When DTC P0087, P0190, P0192 and/or P0193 is set, 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.

Engine Speed Common Rail Pressure
Idling Approximately 25000 to 35000 kPa
3,000 rpm (No engine load) Approximately 28000 to 48000 kPa

MONITOR DESCRIPTION

P0087 (Fuel pressure sensor output stays at fixed value):

Under normal condition, the internal fuel pressure of the common rail usually fluctuates from 1000 to 2000 kPa (10 to 20 kgf/cm2, 145 to 290 psi) even when the driving condition is constant. The internal fuel pressure is approximately 25000 to 35000 kPa (255 to 357 kgf/cm2, 3,626 to 5,076 psi) when idling, and it increases to approximately 35000 to 55000 kPa (357 to 562 kgf/cm2, 5,076 to 7,991 psi) when running the engine at 3,000 rpm. This DTC is set if there is no fluctuation in the internal fuel pressure.

If this DTC is set, the ECM enters fail-safe mode and limits engine power. The fail-safe mode continues until the ignition switch is turned OFF.

B007W64E05
P0190, P0192 and P0193 (Open or short in fuel pressure sensor circuit):

These DTCs are set if the fuel pressure sensor output voltage is out of the standard range and an open or short malfunction of the sensor circuit has occurred.

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

MONITOR STRATEGY

P0087:
Required Sensors Fuel pressure sensor
Frequency of operation Continuous
Duration 1 second
MIL operation 1 driving cycle
P0190:
Required Sensors Fuel pressure sensor
Frequency of operation Continuous
Duration 0.5 second
MIL operation 1 driving cycle
P0192:
Required Sensors Fuel pressure sensor
Frequency of operation Continuous
Duration 0.5 second
MIL operation 1 driving cycle
P0193:
Required Sensors Fuel pressure sensor
Frequency of operation Continuous
Duration 0.5 second
MIL operation 1 driving cycle

TYPICAL ENABLING CONDITIONS

P0087:
Item Specification (Minimum)
Engine speed 500 rpm
Battery voltage 8 V
Fuel volume

5 mm3

The monitor will not run if the fuel pressure sensor circuit (P0190, P0192 and P0193) is malfunctioning

TYPICAL MALFUNCTION THRESHOLDS

P0087:
Detection Criteria Threshold
Changing value of fuel pressure Virtually no fluctuation
P0190:
Detection Criteria Threshold
Fuel pressure sensor output voltage Less than 0.55 V or more than 4.9 V
P0192:
Detection Criteria Threshold
Fuel pressure sensor output voltage Less than 0.55 V
P0193:
Detection Criteria Threshold
Fuel pressure sensor output voltage More than 4.9 V

WIRING DIAGRAM

B007UKUE01

INSPECTION PROCEDURE

Note

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

Tech Tips


  • After completing repairs, check that P0087, P0190, P0192 and/or P0193 is not set again.

  • Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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 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
      DTC P0190, P0192 or P0193 is output A
      DTC P0087 is output B

    B

    REPLACE COMMON RAIL ASSEMBLY Click here

    A

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


    1. Disconnect the ECM connector.

    2. Disconnect the fuel pressure sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D105-66 (PCR1) - D45-2 (PR) Always Below 1 Ω
      D105-68 (VCS) - D45-3 (VC) Always Below 1 Ω
      D105-67 (E2S) - D45-1 (E2) Always Below 1 Ω
      D105-66 (PCR1) or D45-2 (PR) - Body ground Always 10 kΩ or higher
      D105-68 (VCS) or D45-3 (VC) - Body ground Always 10 kΩ or higher
      D105-67 (E2S) or D45-1 (E2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR Click here

    OK

  3. CHECK TERMINAL VOLTAGE


    1. B007QFKE01
      *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 Condition Specified Condition
      D45-3 (VC) - D45-1 (E2) Ignition switch ON 4.5 to 5.5 V

    NG

    REPLACE ECM Click here

    OK

  4. REPLACE 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, P0193)


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.

    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 / Trouble Codes.

    6. Read the DTCs.

      Result Proceed to
      DTC P0087, P0190, P0192 or P0193 is output A
      DTC is not output B

    B

    END

    A

  7. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  8. REPAIR OR REPLACE HARNESS AND 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.

    3. Turn the GTS on.

    4. Clear the DTCs.

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

    6. Turn the ignition switch to ON.

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

    8. Turn the GTS on.

    9. Confirm that the DTC is not output.

      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 N/A, increase the idling time.


    NEXT

    END