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ECD SYSTEM (w/ DPF), Diagnostic DTC:P2454, P2455, P2460, P2461

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DTC Code DTC Name
P2454 Diesel Particulate Filter Pressure Sensor "A" Circuit Low
P2455 Diesel Particulate Filter Pressure Sensor "A" Circuit High
P2460 Diesel Particulate Filter Pressure Sensor "B" Circuit Low
P2461 Diesel Particulate Filter Pressure Sensor "B" Circuit High
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DESCRIPTION

Tip:

  • For more information on the differential pressure sensor assembly and Diesel Particulate Filter (DPF), refer to the following procedures (Click here).

  • If P2454 P2455, P2460 or P2461 is present, refer to the DTC chart for DPF system (Click here).

The two sensing chambers of the differential pressure sensor assembly are mounted to monitor the pressure before and after the DPF catalytic converter. The sensor itself is not located on the engine assembly in order to reduce the influence of vibration.

The ECM compares the exhaust gas pressure before and after the DPF catalytic converter by monitoring the pressure using the upstream and downstream sensing chambers of the differential pressure sensor assembly. If the difference in pressure 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.

When the output voltage of the sensor deviates from the normal operating range, the ECM interprets this as a malfunction of the sensor circuit, and sets DTC P2454 P2455, P2460 or P2461, and illuminates the MIL.

Tip:

If the vacuum hoses of the differential pressure sensor assembly are incorrectly connected (crossed), the ECM interprets this as an abnormal pressure difference, DTC P2453 or P245F is stored and the MIL illuminates.

Table 1. P2454 (Bank 1), P2460 (Bank 2)
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine switch on (IG) for 5 seconds

The differential pressure sensor assembly output voltage is below 0.4 V for 3 seconds or more.

(1 trip detection logic)

  • Open or short in differential pressure sensor assembly circuit

  • Incorrect differential pressure sensor assembly hose routing

  • Differential pressure sensor assembly

  • ECM
Table 2. P2455 (Bank 1), P2461 (Bank 2)
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine switch on (IG) for 5 seconds

The differential pressure sensor assembly output voltage is higher than 4.8 V for 3 seconds or more.

(1 trip detection logic)

  • Open or short in differential pressure sensor assembly circuit

  • Incorrect differential pressure sensor assembly hose routing

  • Differential pressure sensor Assembly

  • ECM
Table 3. Related Data List
DTC No. Data List

P2454

P2455

 DPF Differential Pressure

P2460

P2461

 DPF Differential Pressure #2
Tip:

  • DTC P2453 or P245F will be stored if there is incorrect vacuum hose routing to the differential pressure sensor assembly.

  • After confirming DTC P2454 P2455, P2460 or P2461, check the differential pressure in the "Engine and ECT / Data List / DPF Differential Pressure and DPF Differential Pressure #2" menu using the GTS.

Table 4. Reference:
Condition Differential Pressure Output Sensor Condition
Engine switch on (IG) 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
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MONITOR DESCRIPTION

In order to detect abnormality in the differential pressure sensor assembly, the ECM always monitors the output voltage from the sensor. When the sensor output voltage deviates from the normal operating range (between 0.4 V and 4.8 V) for more than 3 seconds, the ECM interprets this as a malfunction in the sensor circuit and illuminates the MIL.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

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

  • After replacing the fuel supply pump assembly, the ECM needs initialization (Click here).

  • After replacing an injector assembly, the ECM needs registration (Click here).

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.

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PROCEDURE


  1. Click here

    CHECK WIRE HARNESS (DIFFERENTIAL PRESSURE SENSOR ASSEMBLY - ECM)


    1. Disconnect the differential pressure sensor assembly connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Table 5. for LHD
      Tester Connection Condition Specified Condition
      N16-2 (PEX) - C45-69 (PEX) Always Below 1 Ω
      N16-3 (VC) - C45-91 (VC) Always Below 1 Ω
      N16-1 (E2) - C45-92 (E2) Always Below 1 Ω
      C157-2 (PE2X) - C45-70 (PEX2) Always Below 1 Ω
      C157-3 (VC) - C45-91 (VC) Always Below 1 Ω
      C157-1 (E2) - C45-92 (E2) Always Below 1 Ω
      N16-2 (PEX) or C45-69 (PEX) - Body ground Always 10 kΩ or higher
      N16-3 (VC) or C45-91 (VC) - Body ground Always 10 kΩ or higher
      C157-2 (PE2X) or C45-70 (PEX2) - Body ground Always 10 kΩ or higher
      C157-3 (VC) or C45-91 (VC) - Body ground Always 10 kΩ or higher
      Standard Resistance
      Table 6. for RHD
      Tester Connection Condition Specified Condition
      N16-2 (PEX) - C46-69 (PEX) Always Below 1 Ω
      N16-3 (VC) - C46-91 (VC) Always Below 1 Ω
      N16-1 (E2) - C46-92 (E2) Always Below 1 Ω
      C157-2 (PE2X) - C46-70 (PEX2) Always Below 1 Ω
      C157-3 (VC) - C46-91 (VC) Always Below 1 Ω
      C157-1 (E2) - C46-92 (E2) Always Below 1 Ω
      N16-2 (PEX) or C46-69 (PEX) - Body ground Always 10 kΩ or higher
      N16-3 (VC) or C46-91 (VC) - Body ground Always 10 kΩ or higher
      C157-2 (PE2X) or C46-70 (PEX2) - Body ground Always 10 kΩ or higher
      C157-3 (VC) or C46-91 (VC) - Body ground Always 10 kΩ or higher

    4. Reconnect the differential pressure sensor assembly connector.

    5. Reconnect the ECM connector.


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    CHECK TERMINAL VOLTAGE (VC)


    1. A0155AHE32

      Disconnect the differential pressure sensor assembly connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N16-3 (VC) - Body ground Engine switch on (IG) 4.5 to 5.5 V
      C157-3 (VC) - Body ground Engine switch on (IG) 4.5 to 5.5 V
      Table 7. Text in Illustration
      *A for Bank 1
      *B for Bank 2
      *a

      Front view of wire harness connector

      (to Differential Pressure Sensor Assembly)

    3. Reconnect the differential pressure sensor assembly connector.


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    REPLACE DIFFERENTIAL PRESSURE SENSOR ASSEMBLY

    When DTC P2454 or P2455 is output:


    • Replace the differential pressure sensor assembly (for bank 1) (Click here).

    When DTC P2460 or P2461 is output:


    • Replace the differential pressure sensor assembly (for bank 2) (Click here).


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    REPLACE ECM


    1. Replace the ECM (Click here).


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    REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


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    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs (Click here).

    3. Turn the engine switch on (IG) and wait for 5 seconds.

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

    5. Confirm that the DTC is not output again.


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    END