Dtc P2454 Diesel Particulate Filter Pressure Sensor A Circuit Low

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Kd-Ftv Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIRE HARNESS (DIFFERENTIAL PRESSURE SENSOR ASSEMBLY - ECM)

CHECK TERMINAL VOLTAGE (VC)

REPLACE DIFFERENTIAL PRESSURE SENSOR ASSEMBLY

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P2454 Diesel Particulate Filter Pressure Sensor "A" Circuit Low

DTC P2455 Diesel Particulate Filter Pressure Sensor "A" Circuit High


DESCRIPTION

HINT:
  1. For more information on the differential pressure sensor assembly and Diesel Particulate Filter (DPF), refer to the following procedures (HILUX_TGN26 RM000000XSN02CX.html).
  2. If P2454 and/or P2455 is present, refer to the DTC chart for DPF system (HILUX_TGN26 RM000000XSN02CX.html).

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P2454 Diesel Particulate Filter Pressure Sensor A Circuit Low

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 or P2455, and illuminates the MIL.
HINT:
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 (Diesel Particulate Filter Pressure Sensor "A" Circuit Range/Performance) is stored and the MIL illuminates.

P2454
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch ON for 5 seconds
differential pressure sensor assembly output voltage is below 0.4 V for 3 seconds or more.
(1 trip detection logic)
  1. Open or short in differential pressure sensor assembly circuit
  2. Incorrect Differential pressure sensor Assembly hose routing
  3. Differential pressure sensor Assembly
  4. ECM

P2455
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch ON for 5 seconds
differential pressure sensor assembly output voltage is higher than 4.8 V for 3 seconds or more.
(1 trip detection logic)
  1. Open or short in differential pressure sensor assembly circuit
  2. Incorrect Differential pressure sensor Assembly hose routing
  3. Differential pressure sensor Assembly
  4. ECM

Related Data List
DTC No.
Data List
P2454
DPF Differential Pressure
P2455

HINT:
  1. DTC P2453 (Diesel Particulate Filter Pressure Sensor "A" Circuit Range / Performance) will be stored if there is incorrect vacuum hose routing to the differential pressure sensor assembly.
  2. After confirming DTC P2454 and P2455, check the differential pressure in the "Powertrain / Engine and ECT / Data List / DPF Differential Pressure" menu 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 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.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P2454 Diesel Particulate Filter Pressure Sensor A Circuit Low


INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses of circuits related to this system before performing the following inspection procedure.
  2. After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK070X.html) and initialization (HILUX_TGN26 RM000000TIN057X.html).
  3. After replacing the fuel supply pump assembly, the ECM needs initialization (HILUX_TGN26 RM000000TIN057X.html).
  4. After replacing an injector assembly, the ECM needs registration (HILUX_TGN26 RM0000012XK070X.html).
HINT:
Read freeze frame data using the intelligent tester. 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.
1.CHECK WIRE HARNESS (DIFFERENTIAL PRESSURE SENSOR ASSEMBLY - ECM)

  1. Disconnect the differential pressure sensor assembly connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C125-2 (PEX) - C114-7 (PEX)
    		Always
    		Below 1 Ω
    C125-3 (VC) - C114-13 (VC)
    		Always
    		Below 1 Ω
    C125-1 (E2) - C114-14 (E2)
    		Always
    		Below 1 Ω
    C125-2 (PEX) or C114-7 (PEX) - Body ground
    		Always
    		10 kΩ or higher
    C125-3 (VC) or C114-13 (VC) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the differential pressure sensor assembly connector.

  1. Reconnect the ECM connector.



NG
Go to step 5
OK


2.CHECK TERMINAL VOLTAGE (VC)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P2454 Diesel Particulate Filter Pressure Sensor A Circuit Low

  1. Disconnect the differential pressure sensor assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C125-3 (VC) - Body ground
    		Ignition switch ON
    		4.5 to 5.5 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Differential Pressure Sensor Assembly)

  1. Reconnect the differential pressure sensor assembly connector.



NG
Go to step 4
OK


3.REPLACE DIFFERENTIAL PRESSURE SENSOR ASSEMBLY

  1. Replace the differential pressure sensor assembly (HILUX_TGN26 RM000003TI200JX.html).



NEXT
Go to step 6

4.REPLACE ECM

  1. Replace the ECM (HILUX_TGN26 RM0000013Z001HX.html).



NEXT
Go to step 6

5.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.


NEXT


6.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK11ZX.html).

  1. Turn the ignition switch to ON and wait for 5 seconds.

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

  1. Confirm that the DTC is not output again.


NEXT

END