СИСТЕМА ECD, Diagnostic DTC:P2454, P2455

DTC Code DTC Name
P2454 Diesel Particulate Filter Pressure Sensor "A" Circuit Low
P2455 Diesel Particulate Filter Pressure Sensor "A" Circuit High

DESCRIPTION

The ECM compares the exhaust gas pressure before and after the DPF* catalytic converter using a semiconductor-type differential pressure sensor.

If the differential pressure exceeds a predetermined level, the ECM judges that the catalytic converter has clogged with particulate matter (PM). At that time, the ECM begins to perform DPF catalyst regeneration.

*: Diesel Particulate Filter

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2454 Diesel Particulate Filter Pressure Sensor "A" Circuit Low

Differential pressure sensor output voltage is 0.35 V or less for 2 seconds.

(2 trip detection logic)

  • Open or short in differential pressure sensor circuit

  • Incorrect vacuum transmitting hose routing

  • Differential pressure sensor

  • ECM

Comes on DTC stored
P2455 Diesel Particulate Filter Pressure Sensor "A" Circuit High

Differential pressure sensor output voltage is 4.9 V or higher for 2 seconds.

(2 trip detection logic)

  • Open or short in differential pressure sensor circuit

  • Incorrect vacuum transmitting hose routing

  • Differential pressure sensor

  • ECM

Comes on DTC stored
Table 1. DTC Detection Drive Pattern
DTC No. DTC Detection Drive Pattern
P2454 Ignition switch ON for 2 seconds
P2455
Table 2. Related Data List
DTC No. Data List
P2454 DPF Differential Pressure
P2455
Tip:

If the DPF Differential Pressure outputs a negative value when the engine is maintained at an engine speed of 3000 rpm with no load, the hose and pipe connections may be incorrect.

WIRING DIAGRAM

A012KOWE04
Table 3.
*a Differential Pressure Sensor

CAUTION / NOTICE / HINT

Note:

When replacing the ECM, perform ECM Initialization and Registration.

Click here Нажмите здесь

Tip:
  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures 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. READ VALUE USING GTS (DPF DIFFERENTIAL PRESSURE)

    1. Connect the GTS to the DLC3.

    2. Start the engine and turn the GTS on.

    3. Depress and release the accelerator pedal repeatedly several times.

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

      Powertrain > Engine and ECT > Data List
      Tester Display
      DPF Differential Pressure
    5. Read the value when depress and release the accelerator pedal.

      Result
      Result Condition Proceed to
      -5 kPa Always A
      99 kPa or higher Always B
      Between -4 to 98 kPa

      Engine running

      depress and release accelerator pedal

      C
    B Нажмите здесь

    GO TO STEP 3


    C

    CHECK FOR INTERMITTENT PROBLEMS Click hereНажмите здесь


    A
  2. CHECK CONNECTION OF VACUUM TRANSMITTING HOSE (DIFFERENTIAL PRESSURE SENSOR - VACUUM TRANSMITTING PIPE)

    1. Check if vacuum transmitting hoses routing between the differential pressure sensor and the vacuum transmitting pipe is correct.

      A012IUWC01
      *1 Differential Pressure Sensor *2 Vacuum Transmitting Hose (for upstream)
      *3 No. 2 Vacuum Transmitting Hose (for downstream) - -
      *a Marked: Yellow *b Marked: Pink
      *c Marked: Red *d Marked: Orange
    2. Check that there is no exhaust gas leak between the differential pressure sensor and the vacuum transmitting pipe.

      OK
      The vacuum transmitting hoses routing is correct and there is no exhaust gas leak.
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    GO TO STEP 10


    OK
  3. CHECK BLOCKAGE OF VACUUM TRANSMITTING HOSE AND TRANSMITTING PIPE

    ОСТОРОЖНО

    Be careful of being burned by exhaust gases during the following inspection.

    1. Disconnect both vacuum transmitting hoses (upstream and downstream) on the differential pressure sensor.

    2. Start the engine.

    3. Check if there are exhaust gas pulsations from both vacuum transmitting hoses during idling.

      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK
  4. CHECK HARNESS AND CONNECTOR (DIFFERENTIAL PRESSURE SENSOR - ECM)

    1. Disconnect the differential pressure sensor connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B131-2 (PEX) - A101-32 (PEX) Always Below 1 Ω
      B131-3 (VC) - A101-33 (VCPX) Always Below 1 Ω
      B131-1 (E2) - A101-34 (EPEX) Always Below 1 Ω
      B131-2 (PEX) or A101-32 (PEX) - Body ground Always 10 kΩ or higher
      B131-3 (VC) or A101-33 (VCPX) - Body ground Always 10 kΩ or higher
      B131-1 (E2) or A101-34 (EPEX) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK
  5. REPLACE DIFFERENTIAL PRESSURE SENSOR

    1. Replace the differential pressure sensor.

      Click here Нажмите здесь

    2. Start the engine and allow it to idle until the engine coolant temperature reaches 75°C (167°F) or higher (A).

    3. Turn the ignition switch off and wait for 30 seconds or more (B).

    4. Repeat the above procedures (A) and (B) 3 times.

      Tip:

      Procedures (A) and (B) must be repeated 3 times to complete the differential pressure sensor learning process.

      Result
      Proceed to
      NEXT
    NEXT
  6. CHECK WHETHER DTC OUTPUT RECURS (DTC P2454 OR P2455)

    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs
    4. Turn the ignition switch off and wait for 30 seconds or more.

    5. Turn the ignition switch to ON and wait for 10 seconds or more.

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

    7. Read the pending DTCs.

      Powertrain > Engine and ECT > Trouble Codes
      Result
      ResultProceed to
      DTC P2454 or P2455 is outputA
      DTC is not outputB
    B

    END


    A
  7. REPLACE ECM

    1. Replace the ECM.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT
  8. 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.

      Powertrain > Engine and ECT > Clear DTCs
    4. Turn the ignition switch off and wait for 30 seconds or more.

    5. Turn the ignition switch to ON and wait for 10 seconds or more.

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

    7. Confirm that the pending DTC is not output again.

      Powertrain > Engine and ECT > Trouble Codes
      Result
      Proceed to
      NEXT
    NEXT

    END


  9. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT
    NEXT Нажмите здесь

    GO TO STEP 8


  10. REPAIR OR REPLACE MALFUNCTIONING PARTS

    Result
    Proceed to
    NEXT
    NEXT Нажмите здесь

    GO TO STEP 8