ECD SYSTEM, Diagnostic DTC:P2453

DTC Code DTC Name
P2453 Diesel Particulate Filter Pressure Sensor "A" Circuit Range/Performance

DESCRIPTION

Tech Tips


  • For more information on the differential pressure sensor assembly and TOYOTA D-CAT*1, refer to thefollowing procedures Click here.

  • If P2453 is present, refer to the DTC chart for TOYOTA D-CAT Click here.


    • *1: Diesel Clean Advanced Technology

A01QUKCE14

The two sensing chambers of the differential pressure sensor are mounted to monitor the pressure before and after the DPNR*2 catalytic converter. The sensor itself is not located on the engine assembly in order to reduce the influence of vibration. The sensor is a semiconductor-type that is not influenced by exhaust gases.

The ECM compares the exhaust gas pressure before and after the DPNR catalyst by monitoring the pressure using the upstream and downstream sensing chambers of the differential pressure sensor. If the difference between the pressure before and after the catalytic converter exceeds a predetermined level, the ECM judges that the catalytic converter is clogged with particulate matter (PM). When the ECM judges that a partially clogged condition exists, the ECM begins to perform PM forced regeneration.

*2: Diesel Particulate-NOx Reduction system

Tech Tips

If the vacuum hoses of the differential pressure sensor are incorrectly connected (crossed), the ECM interprets this as an abnormal pressure difference, DTC P2453 (Diesel Particulate Filter Pressure Sensor "A" Circuit Range/Performance) is stored and the MIL illuminates.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2453 Diesel Particulate Filter Pressure Sensor "A" Circuit Range/Performance

When the output voltage from the differential pressure sensor output voltage is reversal of positive and negative pressure (and vice versa).

(1 trip detection logic)

  • Incorrect differential pressure sensor hose routing

  • Differential pressure sensor vacuum hose is clogged

  • Blockage in vacuum transmitting pipe sub-assembly

  • Differential pressure sensor

  • ECM

 Comes on DTC stored
Related Data List
DTC No. Data List
P2453 DPF Differential Pressure

Tech Tips


  • DTC P2454 (Diesel Particulate Filter Pressure Sensor "A" Circuit Low) and/or DTC P2455 (Diesel Particulate Filter Pressure Sensor "A" Circuit High) will be stored if there is an open or short malfunction in the differential pressure sensor circuit.

  • After confirming DTC P2453, check the differential pressure in "Powertrain / Engine / Data List / DPF Differential Pressure" using the GTS.

Reference:
Condition Differential Pressure Output Sensor Condition
Ignition switch ON Approximately 0 kPa Normal
Always -5 kPa or less or higher than 99 kPa Open or short circuit
4000 rpm (No engine load) Negative output Incorrect hose routing

MONITOR DESCRIPTION

In order to detect abnormality in the differential pressure sensor, the ECM always monitors the output voltage from the sensor. When the sensor output voltage is a reversal of positive and negative pressure, the ECM interprets this as an incorrect vacuum hose arrangement of the sensor, or determines that the vacuum hoses are clogged, and illuminates the MIL.

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P2453 Engine is running at 4000 rpm with no load for 10 seconds or more.

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P2453)


    1. Connect the GTS to the DLC3.

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

    3. Enter the following menus: Powertrain / Engine / Trouble Codes.


      Powertrain > Engine > Trouble Codes

    4. Read the DTCs.

      Result
      Proceed to
      DTC P2453 is output
      DTC P2453 and other DTCs are output

      Tech Tips

      If any DTCs other than P2453 are output, troubleshoot those DTCs first.


    DTC P2453 and other DTCs are output

    GO TO DTC CHART Click here

    DTC P2453 is output

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


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

      Click here

    2. Check that there is no exhaust gas leakage between the differential pressure sensor and vacuum transmitting pipe.

      Result
      Proceed to
      OK
      NG

    NG

    CORRECT TO NORMAL CONNECTION Click here

    OK

  3. CHECK BLOCKAGE OF VACUUM HOSE AND TRANSMITTING PIPE

    CAUTION:

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


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

    2. Start the engine.

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

      OK
      Exhaust gas pulsation exists.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CLOGGED PARTS Click here

    OK

  4. READ VALUE USING GTS (DPF DIFFERENTIAL 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 / Data List / DPF Differential Pressure.


      Powertrain > Engine > Data List
      Tester Display
      DPF Differential Pressure

    4. Check that the differential pressure is as specified below.

      Result
      Condition Differential Pressure Output Sensor Condition
      Ignition switch ON Approximately 0 kPa Normal
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 6 Click here

    NG

  5. REPLACE DIFFERENTIAL PRESSURE SENSOR ASSEMBLY


    1. Replace the differential pressure sensor assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. 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 > Clear DTCs

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

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

    6. Enter the following menus: Powertrain / Engine / Data List / DPF Differential Pressure.


      Powertrain > Engine > Data List
      Tester Display
      DPF Differential Pressure

    7. Check that the differential pressure is as specified below.

      Tech Tips


      • As long as the pipe connections are correct, the displayed pressure will not be vacuum pressure.

      • For reference result of real-vehicle check is as shown in the table below:

        Condition DPF Differential Pressure
        2500 rpm without load 1.30 kPa

    8. Start the engine.

    9. Engine is running at 4000 rpm with no load for 10 seconds or more.

    10. Enter the following menus: Powertrain / Engine / Trouble Codes.


      Powertrain > Engine > Trouble Codes

    11. 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 / Utility / All Readiness.


        Powertrain > Engine > Utility
        Tester Display
        All Readiness

      2. Input DTC P2453.

      3. Check that STATUS is NORMAL. If STATUS is INCOMPLETE or N/A, run the engine at 4000 rpm with no load for 10 seconds or more.

      Result
      Proceed to
      NEXT

    NEXT

    END

  7. REPLACE CLOGGED PARTS

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 6 Click here

  8. CORRECT TO NORMAL CONNECTION

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 6 Click here