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 and TOYOTA D-CAT*1 Click here.

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

*1: Diesel Clean Advanced Technology

A01IRSQE02

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 catalytic converter 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 DPNR catalyst 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.

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

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
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 and ECT / Data List / DPF Differential Pressure" using the intelligent tester.

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.

INSPECTION PROCEDURE

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 intelligent tester to the DLC3.

    2. Turn the ignition switch to ON and turn the intelligent tester on.

    3. Enter the following menus: Powertrain / Engine and ECT / DTC.

    4. Read DTCs.

      Result
      Display (DTC output) Proceed to
      P2453 A
      P2453 and other DTCs B

      Tech Tips

      If codes other than P2453 are output, perform troubleshooting for those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  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.

      A01ITA5E03

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


    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.

    NG

    REPLACE CLOGGED PARTS Click here

    OK

  4. READ VALUE USING INTELLIGENT TESTER (DPF DIFFERENTIAL PRESSURE)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON and turn the intelligent tester on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / 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

    OK

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

    NG

    REPLACE DIFFERENTIAL PRESSURE SENSOR ASSEMBLY Click here

  5. CORRECT TO NORMAL CONNECTION


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  6. REPLACE CLOGGED PARTS


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  7. REPLACE DIFFERENTIAL PRESSURE SENSOR ASSEMBLY


    1. Replace the differential pressure sensor assembly Click here.


    NEXT

  8. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON and turn the intelligent tester on.

    3. Clear the DTCs Click here.

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

    5. Turn the ignition switch to ON and turn the intelligent tester on.

    6. Enter the following menus: Powertrain / Engine and ECT / Data List / 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
        2513 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. Confirm that the DTC is not output again.

      Tech Tips

      Perform the following procedure using the tester 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 P2453.

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


    NEXT

    END