SFI SYSTEM(for Rear Air Fuel Ratio Sensor), Diagnostic DTC:P244B00

DTC Code DTC Name
P244B00 Particulate Filter Differential Pressure Too High Bank 1

DESCRIPTION

Tech Tips

This DTC is applicable to w/o Canister Pump Module only.

The GPF (Gasoline Particulate Filter) system is an exhaust purification system for processing the PM (Particulate Matter) discharged from the engine. The GPF catalyst has a porous ceramic structure that collects PM, and the collected PM is oxidized as it bonds with oxygen molecules under high temperature. When the fuel cut operation is performed after the GPF rises to a high temperature under high load operation, PM is oxidized, but under low temperature conditions, PM oxidation is insufficient and deposits accumulate.

A differential pressure sensor is installed to monitor the pressure before the GPF catalyst converter. The sensor is a semiconductor type that is not affected by the exhaust gas. The differential pressure sensor outputs the difference between the atmospheric pressure and the pressure before the GPF catalyst. The differential pressure sensor outputs the difference between the atmospheric pressure and the pressure before the GPF catalyst.

B007XATE02
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P244B00 Particulate Filter Differential Pressure Too High Bank 1 Differential pressure sensor (bank 1) output value at intake air flow of 30 gm/sec*1 or higher is at the threshold*2 or higher (1 trip detection logic).

  • Center exhaust pipe assembly (GPF)

  • Differential pressure sensor

  • Mass air flow meter sub-assembly

  • Wire harness or connector

  • ECM

Comes on* / Does not come on

*: The MIL is illuminated when PM or ash accumulation has progressed and protection of parts has become necessary.

 DTC stored SAE Code: P244B

*1: The total value of Mass Air Flow Sensor

*2: Threshold differs according to intake air flow

MONITOR DESCRIPTION

The differential pressure sensor outputs the difference between the atmospheric pressure and the pressure before the GPF catalyst. When the GPF differential pressure is at the threshold or higher due to PM or ash accumulation in the GPF catalyst, output is limited during high load operation. At this time, the ECM illuminates the MIL* and stores a DTC.

*: The MIL is illuminated when PM or ash accumulation has progressed and protection of parts has become necessary.

B007YSBE01

MONITOR STRATEGY

Frequency of Operation Once per driving cycle

CONFIRMATION DRIVING PATTERN

B007XXAE02

  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG).

  3. Turn the GTS on.

  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  5. Idle the engine for 5 minutes or more [A].

  6. Turn the engine switch off and wait for at least 30 seconds.

  7. Start the engine.

  8. Repeat the pattern of accelerating the vehicle from rest to approximately 60 km/h (37 mph) [depress the accelerator pedal by a large amount at 2nd shift position] and then decelerating the vehicle 5 times [B].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  9. Turn the engine switch off and wait for at least 30 seconds.

  10. Turn the engine switch on (IG).

  11. Turn the GTS on.

  12. Enter the following menus: Powertrain / Engine / Trouble Codes [C].

  13. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  15. Input the DTC: P244B00.

  16. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions

    Tech Tips


    • If the judgment result is NORMAL, the system is normal.

    • If the judgment result is ABNORMAL, the system has a malfunction.

    • If the judgment result is INCOMPLETE, perform steps [A] through [C] again.

WIRING DIAGRAM


CAUTION / NOTICE / HINT

Tech Tips


  • Clear the Vehicle Control History after completing repairs.

    Click here

  • Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P244B00)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Utility / Vehicle Control History (RoB).


      Powertrain > Engine > Utility
      Tester Display
      Vehicle Control History (RoB)

    5. Record the Vehicle Control History.

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

    7. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC P244B00 is output A
      DTC P244B00 and other DTCs are output B

      Tech Tips

      If any DTCs other than P244B00 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. READ VALUE USING GTS (ASH DEPOSITION RATIO)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / Ash Deposition Ratio Bank1.


      Powertrain > Engine > Data List
      Tester Display
      Ash Deposition Ratio Bank1

    5. Read the value displayed on the GTS.

      Standard
      GTS Display Specified Condition
      Ash Deposition Ratio Bank1 Less than 100%
      Result
      Proceed to
      OK
      NG

      Tech Tips

      Clear the GPF deterioration record using the GTS after replacing the center exhaust pipe assembly (GPF).

      Click here


    NG

    REPLACE CENTER EXHAUST PIPE ASSEMBLY (GPF) Click here

    OK

  3. READ VALUE USING GTS (PM DEPOSITION RATIO)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / PM Deposition Ratio Bank 1.


      Powertrain > Engine > Data List
      Tester Display
      PM Deposition Ratio Bank1

    5. Read the values displayed on the GTS.

      Standard
      GTS Display Specified Condition
      PM Deposition Ratio Bank1 Less than 100%
      Result
      Proceed to
      OK
      NG

      Tech Tips

      Clear the GPF deterioration record using the GTS after replacing the center exhaust pipe assembly (GPF).

      Click here


    NG

    REPLACE CENTER EXHAUST PIPE ASSEMBLY (GPF) Click here

    OK

  4. INSPECT DIFFERENTIAL PRESSURE SENSOR


    1. Inspect the differential pressure sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (DIFFERENTIAL PRESSURE SENSOR - ECM) Click here

    OK

  5. READ VALUE USING GTS (MASS AIR FLOW SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Mass Air Flow Sensor and Coolant Temperature.


      Powertrain > Engine > Data List
      Tester Display
      Engine Speed
      Mass Air Flow Sensor
      Coolant Temperature

    5. Allow the engine to idle until Coolant Temperature reaches 75°C (167°F) or higher.

    6. Read Mass Air Flow Sensor while maintaining an engine speed of 3000 rpm.

      Standard
      GTS Display Condition Specified Condition
      Mass Air Flow Sensor

      • Shift lever position: P

      • A/C: Off

      • Engine warmed up

      • Engine Speed: 3000 rpm

      		 Between 6.0 and 18.0 gm/sec
      Result
      Proceed to
      OK
      NG

      Tech Tips

      Clear the GPF deterioration record using the GTS after replacing the center exhaust pipe assembly (GPF).

      Click here


    OK

    REPLACE CENTER EXHAUST PIPE ASSEMBLY (GPF) Click here

    NG

  6. CHECK TERMINAL VOLTAGE (POWER SOURCE OF MASS AIR FLOW METER SUB-ASSEMBLY)

    B007ZMAC33
    *a

    Front view of wire harness connector

    (to Mass Air Flow Meter Sub-assembly)

    1. Disconnect the mass air flow meter sub-assembly connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D9-3 (+B) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR POWER INTEGRATION ECU - MASS AIR FLOW METER SUB-ASSEMBLY) Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)


    1. Disconnect the mass air flow meter sub-assembly connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D9-5 (VG) - D1-92 (VG) Always Below 1 Ω
      D9-4 (E2G) - D1-91 (E2G) Always Below 1 Ω
      D9-5 (VG) or D1-92 (VG) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (SENSOR GROUND)


    1. Disconnect the mass air flow meter sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D9-4 (E2G) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ECM Click here

    OK

  9. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY


    1. Inspect the mass air flow meter sub-assembly, referring to On-vehicle Inspection for Mass Air Flow Meter.

      Click here

    2. Inspect the mass air flow meter sub-assembly, referring to Inspection for Mass Air Flow Meter.

      Click here

    3. Inspect the function of the mass air flow meter sub-assembly.


      1. Connect the GTS to the DLC3.

      2. Turn the engine switch on (IG).

      3. Turn the GTS on.

      4. Enter the following menus: Powertrain / Engine / Data List / Mass Air Flow Sensor.


        Powertrain > Engine > Data List
        Tester Display
        Mass Air Flow Sensor

      5. Start the engine.

      6. Check that the Mass Air Flow Sensor value changes when the engine is raced.

        OK
        The reading changes.

        Tech Tips

        Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

        Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Click here

  10. CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR POWER INTEGRATION ECU - MASS AIR FLOW METER SUB-ASSEMBLY)


    1. Disconnect the semiconductor power integration ECU connector.

    2. Disconnect the mass air flow meter sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-1 - D9-3 (+B) Always Below 1 Ω
      1G-1 or D9-3 (+B) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SEMICONDUCTOR POWER INTEGRATION ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. CHECK HARNESS AND CONNECTOR (DIFFERENTIAL PRESSURE SENSOR - ECM)


    1. Disconnect the differential pressure sensor connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D75-3 (VC) - D1-80 (VCPX) Always Below 1 Ω
      D75-2 (PEX) - D1-78 (PEX) Always Below 1 Ω
      D75-1 (E2) - D1-79 (EPEX) Always Below 1 Ω
      D75-3 (VC) or D1-80 (VCPX) - Body ground and other terminals Always 10 kΩ or higher
      D75-2 (PEX) or D1-78 (PEX) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. REPLACE DIFFERENTIAL PRESSURE SENSOR


    1. Replace the differential pressure sensor.

      Click here

    2. Start the engine and allow it to idle until the engine coolant temperature reaches 75°C (167°F) or higher (A).

    3. Turn the engine switch off and wait for 30 seconds or more (B).

    4. Repeat the above procedures (A) and (B) 3 times.

      Tech Tips

      Procedures (A) and (B) must be repeated 3 times to complete the differential pressure sensor learning process.

      Result
      Proceed to
      NEXT

    NEXT

    END