ECD SYSTEM, Diagnostic DTC:P2453

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

DESCRIPTION

Tip:

  • 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

A128654E14

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

Tip:

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
Table 1. Related Data List

DTC No.

Data List

P2453

DPF Differential Pressure
Tip:

  • 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.

Table 2. 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
      Tip:

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

    DTC P2453 and other DTCs are output

    GO TO DTC CHART

    Click hereClick 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 CONNECTIONClick 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 PARTSClick 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.

      Table 3. Result

      Condition

      Differential Pressure Output

      Sensor Condition

      Ignition switch ON

      Approximately 0 kPa

      Normal

    Result

    Proceed to

    OK

    NG
    OK

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick 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.

      Tip:

      • 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.

      Tip:

      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

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  8. CORRECT TO NORMAL CONNECTION

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here