СИСТЕМА ECD, Diagnostic DTC:P0087, P0088, P1092, P1094

DTC Code DTC Name
P0087 Fuel Rail / System Pressure - Too Low
P0088 Fuel Rail / System Pressure - Too High
P1092 Maximum Positive Deviation of Rail Pressure Exceeded Concerning Set Flow of Fuel
P1094 Rail Pressure below Threshold during Start

DESCRIPTION

Refer to P0192 Click here.

DTC No. DTC Detection Condition Trouble Area
P0087

Common rail internal pressure is less than 17000 to 20000 kPa (varies with engine speed) for 0.3 to 0.9 seconds.

(1 trip detection logic)

  • Fuel quantity control valve (fuel supply pump assembly)

  • Open or short in fuel quantity control valve (fuel supply pump assembly) circuit

  • Fuel filter element clogged

  • Fuel leak

  • Injector assembly

  • Lack of fuel

  • Fuel line (air bleeding)

  • ECM
DTC No. DTC Detection Condition Trouble Area
P0088

Common rail internal pressure is 175000 kPa or more for 0.3 to 2.0 seconds.

(1 trip detection logic)

  • Fuel quantity control valve (fuel supply pump assembly)

  • Open or short in fuel quantity control valve (fuel supply pump assembly) circuit

  • Fuel filter element clogged

  • Fuel leak

  • Injector assembly

  • Lack of fuel

  • Fuel line (air bleeding)

  • ECM
DTC No. DTC Detection Condition Trouble Area
P1092

When positive control deviation is more than 20000 kPa and volumetric flow via fuel quantity control valve reaches or exceeds the threshold

(3 trip detection logic)

  • Fuel quantity control valve (fuel supply pump assembly)

  • Open or short in fuel quantity control valve (fuel supply pump assembly) circuit

  • Fuel filter element clogged

  • Fuel leak

  • Injector assembly

  • Lack of fuel

  • Fuel line (air bleeding)

  • ECM
DTC No. DTC Detection Condition Trouble Area
P1094

When the common rail internal pressure is 18000 kPa or lower regardless of whether the engine speed is 160 rpm or higher after the engine is started, a counter is increased every 10 msec. If the counter exceeds a predetermined value, this DTC is stored.

(3 trip detection logic)

  • Fuel quantity control valve (fuel supply pump assembly)

  • Open or short in fuel quantity control valve (fuel supply pump assembly) circuit

  • Fuel filter element clogged

  • Fuel leak

  • Injector assembly

  • Lack of fuel

  • Fuel line (air bleeding)

  • ECM
Related Data List
DTC No. Data List

P0087

P0088

P1092

P1094

  • Target Common Rail Pressure

  • Common Rail Pressure

INSPECTION PROCEDURE

Note


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

  • After replacing the fuel supply pump assembly, the ECM needs initialization Click here.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

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. CHECK ANY OTHER DTCS 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
      DTC P0087, P0088, P1092 or P1094 A
      DTC P0087, P0088, P1092 or P1094 and other DTCs B

      Tech Tips

      If any DTCs other than P0087, P0088, P1092 to P1094 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. CHECK FUEL RECEIVER GAUGE (AMOUNT OF FUEL)


    1. Check if the fuel level is low.

      Result
      Result Proceed to
      The indicator (fuel warning light) is illuminated A
      The indicator (fuel warning light) is not illuminated B

    B

    CLEAR DTC Click here

    A

  3. ADD FUEL


    NEXT

  4. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK


    1. Check the fuel pump operation and for fuel leak Click here.

      Tech Tips

      If the fuel pump operation cannot be performed, inspect the fuel pump control circuit Click here.


    NEXT

  5. CHECK WHETHER DTC OUTPUT RECURS (DTC P0087, P0088, P1092 or P1094)


    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: Engine and ECT / Trouble Codes.

    8. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      DTC P0087, P0088, P1092 or P1094 B

    B

    CLEAR DTC Click here

    A

    DTC CAUSED BY RUNNING OUT OF FUEL

  6. CLEAR DTC


    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.


    NEXT

  7. CHECK ENGINE STARTING CONDITION

    OK
    The engine can be started within 4 seconds.

    Note

    Just after starting the engine, visually check for fuel leaks from the fuel supply pump assembly, the injector assemblies, the common rail assembly, and the fuel pipes in high-pressure areas.


    OK

    READ VALUE USING GTS (COMMON RAIL PRESSURE AND TARGET COMMON RAIL PRESSURE) Click here

    NG

    CHECK FUEL PRESSURE Click here

  8. CHECK FUEL PRESSURE


    1. Check the fuel pressure Click here.


    OK

    READ VALUE USING GTS (COMMON RAIL PRESSURE AND TARGET COMMON RAIL PRESSURE) Click here

    NG

    CHECK AND REPLACE FUEL INLET PIPE Click here

  9. CHECK AND REPLACE FUEL INLET PIPE


    1. Check the following items (fuel line from fuel tank to supply pump), and repair or replace the malfunctioning part if necessary.


      1. Check for fuel filter clogging.

      2. Check for fuel freezing in the fuel line when the cold condition.

      3. Check for clogging or leaks in the fuel pipe and hose between the fuel tank and fuel supply pump assembly.


    NEXT

  10. 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

    REPLACE FUEL SUPPLY PUMP ASSEMBLY Click here

    OK

  11. CHECK WHETHER DTC OUTPUT RECURS (DTC P0087, P0088, P1092 or P1094)


    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: Engine and ECT / Trouble Codes.

    8. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      DTC P0087, P0088, P1092 or P1094 B

    B

    REPLACE FUEL SUPPLY PUMP ASSEMBLY Click here

    A

    END

  12. REPLACE FUEL SUPPLY PUMP ASSEMBLY


    1. Replace the fuel supply pump assembly Click here.

    2. Perform the supply pump learning value reset Click here.


    NEXT

  13. 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: Engine and ECT / Trouble Codes.

    8. Confirm that the DTC is not output again.


    NEXT

    END