СИСТЕМА ECD, Diagnostic DTC:P244B

DTC Code DTC Name
P244B Diesel Particulate Filter Differential Pressure Too High

DESCRIPTION

Refer to DTC P244A.

Click hereНажмите здесь

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P244B Diesel Particulate Filter Differential Pressure Too High While driving, Catalyst Differential Pressure becomes more than 0.47 for 3 seconds (1 trip detection logic).

  • DPF catalytic converter (exhaust manifold converter sub-assembly)

  • Differential pressure sensor assembly

Common Inspection Item:

  • Fuel injection system

  • Intake/Exhaust system

  • After treatment control system

 Comes on DTC stored
Table 1. Related Data List
DTC No. Data List
P244B

  • DPF Differential Pressure

  • Catalyst Differential Press

  • Exhaust Fuel Addition FB

MONITOR DESCRIPTION

The ECM compares pressure upstream and downstream of the DPF catalyst to monitor the differential pressure. If the differential pressure is large, the ECM determines that the DPF catalyst is contaminated or has deteriorated and illuminates the MIL.

A012FD5E06

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P244B Engine is running at 4000 rpm with no load for 10 seconds or more.

CAUTION / NOTICE / HINT

Note:

  • After turning ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here Нажмите здесь

  • After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click hereНажмите здесь).

  • After replacing the suction control valve, the ECM needs initialization.

    Click hereНажмите здесь

  • After replacing an injector assembly, the ECM needs registration.

    Click hereНажмите здесь

  • After replacing the exhaust manifold converter sub-assembly (DPF catalyst), clear the thermal deterioration data stored in the ECM.

    Click hereНажмите здесь

Tip:

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. READ DTC OUTPUT (RECORD STORED DTC AND FREEZE FRAME DATA)

    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. Record the stored DTC and freeze frame data.

      Powertrain > Engine and ECT > Trouble Codes

    5. Check Exhaust Fuel Addition FB and Catalyst Differential Press in the freeze frame data.

      Tip:

      • When the Exhaust Fuel Addition FB value is 1.45 or more, it indicates a high possibility of insufficient temperature increase during PM forced regeneration.

      • When the Catalyst Differential Press value is more than 0.47, it indicates a high possibility that DPF catalyst is clogged.

      Result
      Proceed to
      NEXT
    NEXT

  2. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P244B)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read the DTCs.

      Powertrain > Engine and ECT > Trouble Codes
      Result
      ResultProceed to
      DTC P244B is outputA
      DTC P244B is output at the same time as P2463*
      Other relevant DTCs are outputB
      Tip:

      *: When P244B is output at the same time as P2463, perform this diagnostic procedure. When DTC P244B is not output at the same time as P2463 is output, perform the diagnostic procedure for P244C.

      Click hereНажмите здесь

    B Нажмите здесь

    A

  3. READ VALUE USING GTS (DPF DIFFERENTIAL PRESSURE)

    1. Connect the GTS to the DLC3.

    2. Start the engine and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / DPF Differential Pressure.

      Powertrain > Engine and ECT > Data List
      Tester Display
      DPF Differential Pressure

    4. Check the DPF Differential Pressure values from idle speed to unloaded maximum engine speed.

      Result
      Result Proceed to
      DPF Differential Pressure increases as engine speed increases from idle speed A
      Except above B
      A012N8FE04
      Tip:

      If DPF Differential Pressure indicates negative pressure for approx. 1 second as shown in the illustration (A) when the engine speed increases, the differential pressure sensor piping of the DPF catalyst may be clogged.

    A Нажмите здесь

    GO TO STEP 5

    B

  4. CLEAN OR REPLACE VACUUM TRANSMITTING HOSE ASSEMBLY

    1. Even though it has been determined that the vacuum transmitting hose assembly needs to be repaired or cleaned, make sure to perform all diagnostic procedures for DTC P244B before repairing or cleaning it.

      Result
      Proceed to
      NEXT
    NEXT

  5. CHECK FOR BLACK SMOKE

    1. Start the engine and drive the vehicle until the engine coolant temperature reaches 60°C (140°F) or higher.

    2. Stop the vehicle and allow the engine to idle.

    3. Fully depress the accelerator pedal for 5 seconds, and then release it [A].

    4. Repeat the procedure [A] 10 times [B].

    5. Check for black smoke emission during the procedures [A] and [B].

      OK
      Black smoke is emitted less than 5 times.
      Tip:

      Even if the black smoke is very thin, count the number of black smoke emissions if there is any visible smoke.

      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK

  6. READ VALUE USING GTS (CATALYST DIFFERENTIAL PRESS)

    1. Connect the GTS to the DLC3.

    2. Start the engine and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Catalyst Differential Press.

      Powertrain > Engine and ECT > Data List
      Tester Display
      Catalyst Differential Press

    4. Check the value of Catalyst Differential Press at 4000 rpm without load.

      Result
      Result Proceed to
      Catalyst Differential Press is more than 0.47 A
      Except above B
    A Нажмите здесь

    GO TO STEP 8

    B

  7. PERFORM PM FORCED REGENERATION

    1. Clear the DTC and Exhaust Fuel Addition FB value by disconnecting the cable from the negative (-) battery terminal or removing the EFI-MAIN fuse for 1 minute or more.

      Tip:

      • The accumulated PM volume stored in the ECM cannot be initialized using the GTS.

      • To perform PM forced regeneration, it is necessary to perform initialization of the accumulated PM volume stored in the ECM.

    2. Connect the GTS to the DLC3.

    3. Start the engine and drive the vehicle until the engine coolant temperature reaches 60°C (140°F) or higher.

    4. Move the shift lever to neutral and set the parking brake.

    5. Turn the GTS on.

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the DPF Rejuvenate (PM) / All Data / PM Accumulation Ratio.

      Powertrain > Engine and ECT > Active Test
      Active Test Display
      Activate the DPF Rejuvenate (PM)
      Data List Display
      PM Accumulation Ratio

    7. Perform the Active Test while the vehicle is driven at a constant vehicle speed within 50 to 100 km/h (31 to 62 mph) (transmission in 3rd gear) for more than 15 minutes.

      ОСТОРОЖНО

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

      Tip:

      • While the "Activate the DPF Rejuvenate (PM)" Active Test is being performed, the accelerator opening angle should be kept as constant as possible.

      • When you start driving, "DPNR/DPF Status Reju(PM)" on the Data List displays "Compl". However, continue to drive the vehicle until "PM Accumulation Ratio" drops to 0%.

      • Once "PM Accumulation Ratio" drops to 0%, regeneration is complete.

    8. Continue to drive the vehicle until "PM Accumulation Ratio" drops to 0%.

      ОСТОРОЖНО

      Be aware of excessive heat on and around the exhaust pipes during PM forced regeneration.

      Note:

      If PM forced regeneration stops, repair the malfunction that caused it to stop, and perform it again to complete the operation.

      Tip:

      • PM forced regeneration completes in 15 to 40 minutes.

      • PM forced regeneration time changes depending on PM Accumulation Ratio and driving conditions.

      • A fail-safe stops PM forced regeneration if Catalyst Differential Press increases too much during regeneration.

      • Exhaust Temperature B1S3 becomes 500°C (932°F) or higher within 20 minutes of PM forced regeneration start.

      • PM forced regeneration will be stopped if the accelerator pedal is depressed during regeneration. In this case, PM forced regeneration needs to be performed again.

      • Even if PM forced regeneration stops while it is occurring, the GTS displays Compl (complete) for DPNR/DPF Status Reju(PM).

      Result
      PM forced regeneration completes normally.
      Result
      Proceed to
      OK
      NG
    OK

    END

    NG Нажмите здесь

    GO TO STEP 10

  8. REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY

    1. Even though it has been determined that the DPF catalytic converter (exhaust manifold converter sub-assembly) needs to be replaced, make sure to perform all diagnostic procedures for DTC P244B before replacing it.

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 10

  9. GO TO DTC CHART

    1. Perform inspection and repair of relevant DTCs.

      Click here Нажмите здесь

      Result
      Proceed to
      NEXT
    NEXT

  10. CHECK FUEL INJECTION SYSTEM

    1. Check the fuel injection system.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT

  11. CHECK INTAKE / EXHAUST SYSTEM

    1. Check the intake/exhaust system.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT

  12. CHECK AFTER TREATMENT CONTROL SYSTEM

    1. Check the after treatment control system.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT

  13. REPAIR OR REPLACE MALFUNCTIONING PARTS

    Tip:

    Repair, replace or clean the following items only when it has been determined necessary based on diagnosis for DTC P244B.

    1. Clean and/or repair the hoses of the differential pressure sensor assembly.

    2. Replace the DPF catalytic converter (exhaust manifold converter sub-assembly).

      Click hereНажмите здесь

      Note:

      Perform Initialization procedure for DPF catalyst record clear.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT

  14. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    1. Clear the DTC and Exhaust Fuel Addition FB value by disconnecting the cable from the negative (-) battery terminal or removing the EFI-MAIN fuse for 1 minute or more.

      Tip:

      • The accumulated PM volume stored in the ECM cannot be initialized using the GTS.

      • To perform PM forced regeneration, it is necessary to perform initialization of the accumulated PM volume stored in the ECM.

    2. Connect the GTS to the DLC3.

    3. Start the engine and drive the vehicle until the engine coolant temperature reaches 60°C (140°F) or higher.

    4. Move the shift lever to neutral and set the parking brake.

    5. Turn the GTS on.

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the DPF Rejuvenate (PM) / All Data / PM Accumulation Ratio.

      Powertrain > Engine and ECT > Active Test
      Active Test Display
      Activate the DPF Rejuvenate (PM)
      Data List Display
      PM Accumulation Ratio

    7. Perform the Active Test while the vehicle is driven at a constant vehicle speed within 50 to 100 km/h (31 to 62 mph) (transmission in 3rd gear) for more than 15 minutes.

      ОСТОРОЖНО

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

      Tip:

      • While the "Activate the DPF Rejuvenate (PM)" Active Test is being performed, the accelerator opening angle should be kept as constant as possible.

      • When you start driving, "DPNR/DPF Status Reju(PM)" on the Data List displays "Compl". However, continue to drive the vehicle until "PM Accumulation Ratio" drops to 0%.

      • Once "PM Accumulation Ratio" drops to 0%, regeneration is complete.

    8. Continue to drive the vehicle until "PM Accumulation Ratio" drops to 0%.

      ОСТОРОЖНО

      Be aware of excessive heat on and around the exhaust pipes during PM forced regeneration.

      Note:

      If PM forced regeneration stops, repair the malfunction that caused it to stop, and perform it again to complete the operation.

      Tip:

      • PM forced regeneration completes in 15 to 40 minutes.

      • PM forced regeneration time changes depending on PM Accumulation Ratio and driving conditions.

      • A fail-safe stops PM forced regeneration if Catalyst Differential Press increases too much during regeneration.

      • Exhaust Temperature B1S3 becomes 500°C (932°F) or higher within 20 minutes of PM forced regeneration start.

      • PM forced regeneration will be stopped if the accelerator pedal is depressed during regeneration. In this case, PM forced regeneration needs to be performed again.

      • Even if PM forced regeneration stops while it is occurring, the GTS displays Compl (complete) for DPNR/DPF Status Reju(PM).

      Result
      Proceed to
      NEXT
    NEXT

    END