СИСТЕМА ECD (для моделей с контроллером свечей накаливания), Diagnostic DTC:P252F

DTC Code DTC Name
P252F Engine Oil Level High

DESCRIPTION

In the DPF system, after the main injection and at the end of expansion stroke, the injector assembly sprays a small amount of fuel to control PM regeneration; this is called "post injection".

Because the temperature and pressure of the sprayed fuel are low, it arrives at the catalytic converter unburned. The fuel is then oxidized by the catalytic action and the temperature of the DPF catalyst bed increases to burn accumulated soot.

However, some of the unburned fuel goes down to the oil pan through clearances in the cylinder walls. This fuel is mixed into the engine oil, causing the engine oil volume to increase.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P252F Engine Oil Level High

Both of following conditions (a) and (b) are met:

(1 trip detection logic)


  • (a) Oil level upper switch is on for 20 seconds or more.

  • (b) Condition (a) is detected on 2 consecutive trips

  • Engine oil amount

  • Engine oil level sensor (oil level upper switch)

  • Open or short in oil level sensor (oil level upper switch) circuit

-

(Engine oil change reminder light [message] on)

 DTC stored
DTC Detection Drive Pattern
DTC No. DTC Detection Drive Pattern
P252F

All of the following conditions are met:


  • Engine coolant temperature is 65°C (149°F) to 90°C (194°F)

  • Vehicle being driven at a speed of 5 km/h (3.1 mph) or more

  • Engine speed between 1800 and 3000 rpm

WIRING DIAGRAM

B0042WSE02

CAUTION / NOTICE / HINT

Tech Tips

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.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P252F)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read the DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      DTC P252F is output A
      DTC P252F and P2463 are output
      DTC P252F and other DTCs are output B

      Tech Tips

      If any DTCs other than P252F are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. CONFIRM MILEAGE FROM LAST ENGINE OIL REPLACEMENT TIMING


    1. Check the mileage from the last engine oil replacement timing.

      Result
      Result Proceed to
      Less than 15000 km (9321 mile) A
      15000 km (9321 mile) or more B

    B

    CHANGE ENGINE OIL Click here

    A

  3. CHECK ENGINE OIL LEVEL

    B0043LKC01
    *a Point 1 (Minimum Level)
    *b Point 2 (Maximum Level)

    1. Check the engine oil level.


      1. Put vehicle on a flat level surface.

      2. Start the engine and warm it to up until the engine coolant temperature reaches at 75 to 86°C (167 to 187°F).

      3. Turn the ignition switch off and wait for 5 minutes or more.

      4. Take dipstick out, insert it back, wait for 5 seconds and take it out again.

      5. Check oil level on the dipstick.

      6. Measure distance from point 2 (maximum level) to current oil level.

        Result
        Result Proceed to
        More than +4 mm (+0.157 in.) A
        +4 mm (+0.157 in.) or less B

    A

    GO TO STEP 6 Click here

    B

  4. INSPECT ENGINE OIL LEVEL SENSOR (OIL LEVEL UPPER SWITCH)


    1. Inspect the engine oil level sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ENGINE OIL LEVEL SENSOR (OIL LEVEL UPPER SWITCH) Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (ENGINE OIL LEVEL SENSOR - ECM - BODY GROUND)


    1. Disconnect the engine oil level 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
      B125-3 (OIL) - B212-98 (OILH) Always Below 1 Ω
      B125-2 (E) - Body ground Always Below 1 Ω
      B125-3 (OIL) or B212-98 (OILH) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  6. PERFORM ACTIVE TEST USING GTS (FIRST TIME OF ACTIVATE THE DPF REJUVENATE (PM))


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Start the engine.

    5. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the DPF Rejuvenate (PM) / Data List / MAF, Exhaust Temperature B1S1, Exhaust Temperature B1S2, DPF Differential Pressure and DPNR/DPF Status Reju(PM).


      Powertrain > Engine and ECT > Active Test
      Active Test Display
      Activate the DPF Rejuvenate (PM)
      Data List Display
      MAF
      Exhaust Temperature B1S1
      Exhaust Temperature B1S2
      DPF Differential Pressure

      Tech Tips

      After clearing DTCs, immediately enter the Active Test and then drive the vehicle.

    7. Perform the Active Test and then drive the vehicle at a constant engine speed of 2500 to 3000 rpm or more (If DPF Differential Pressure judgment will be performed in the following step, then to keep the MAF at 30 gm/sec or more, use a higher engine rpm range than normal) (shift position: 3rd gear) at a vehicle speed between 65 to 100 km/h (40 to 62 mph).

      CAUTION:

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

      Tech Tips

      While the Active Test being performed, the accelerator pedal opening angle should be kept as constant as possible.

    8. Confirm that both Exhaust Temperature B1S1 and Exhaust Temperature B1S2 reach 250°C (482°F) or higher and the DPNR/DPF Status Reju(PM) turns from "Ready" to "Operate".

      Tech Tips


      • If the exhaust gas temperature does not reach the specified value, drive the vehicle again with a constant engine speed of 2500 to 3000 rpm or more (shift position: 3rd gear) at a vehicle speed between 65 to 100 km/h (40 to 62 mph).

      • Perform Active Test until one of the following conditions is met:


        1. DPNR/DPF Status Reju(PM) displays "Compl".

        2. DPNR/DPF Status Reju(PM) turns from "Operate" to "Ready" even if the cumulative time of "Operate" exceeds 35 minutes.

        3. DPNR/DPF Status Reju(PM) stays "Ready" even if both Exhaust Temperature B1S1 and Exhaust Temperature B1S2 have reached 250°C (482°F) or higher for more than 10 minutes with an engine speed of 2000 rpm or more. (PM regeneration could not operate.)

    9. Take a snapshot with the GTS when the Exhaust Temperature B1S1 and Exhaust Temperature B1S2 rise and become stable.

    10. Enter the following menus: Powertrain / Engine and ECT / Data List / DPNR/DPF Status Reju(PM).


      Powertrain > Engine and ECT > Data List
      Tester Display
      DPNR/DPF Status Reju(PM)

    11. Confirm the DPNR/DPF Status Reju(PM).

      Tech Tips


      • While the performing PM regeneration, the DPNR/DPF Status Reju(PM) displays "Operate".

      • If the PM regeneration is stopped (DPNR/DPF Status Reju(PM) displays "Ready") because the exhaust gas temperature is reduced due to the driving conditions, the PM regeneration is restarted automatically (DPNR/DPF Status Reju(PM) displays "Operate") when the exhaust gas temperature is recuperated by high engine speed driving.

      • If the cumulative time of DPNR/DPF Status Reju(PM) at "Operate" exceeds 35 minutes, the Active Test will be canceled. In this case, the DPNR/DPF Status Reju(PM) turns to "Ready" and the Active Test / Activate the DPF Rejuvenate (PM) will be prohibited for one hour while the engine running. Thus, perform the Active Test again after running the engine for one hour.

      DPNR/DPF Status Reju(PM) (Reference)
      GTS Display Status
      Standby Before entering "Activate the DPF Rejuvenate (PM)"
      Ready Enabling condition for "Activate the DPF Rejuvenate (PM)" is not sufficient
      Operate

      • PM regeneration is being performed.

      • If "Activate the DPF Rejuvenate (PM)" is not finished completely, the status turns to "Ready".

        For example, if the vehicle idles for more than 3 minutes while the PM regeneration is being performed, the exhaust gas temperature falls to outside of enabling condition and PM regeneration is stopped.

      • If "Activate the DPF Rejuvenate (PM)" is finished completely, the status turns to "Compl".
      Compl PM regeneration is completed (Amount of PM is 0 g)

    12. Read the values of the Data List / MAF, Exhaust Temperature B1S2 and DPF Differential Pressure in the Snapshot Review function.

      Standard
      DPNR/DPF Status Reju(PM) is "Compl" and Exhaust Temperature B1S2 is 570°C (1058°F) or higher during PM regeneration.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO DTC P2463 INSPECTION PROCEDURE Click here

    OK

  7. READ VALUE USING GTS (DPF DIFFERENTIAL PRESSURE)


    1. In the snapshot recorded in Step 6, check the DPF Differential Pressure, MAF and Exhaust Temperature B1S2 values during regeneration (DPNR/DPF Status Reju (PM) is "Operate").


      1. Check that "DPNR/DPF Status Reju (PM)" is "Compl" (Forced regeneration is complete).

      2. Change the snapshot data to graph display.

      3. Select from the parameter list "DPF Differential Pressure", "MAF" and "Exhaust Temperature B1S2".

      4. Select graph type to be "Line" and select 2 sec/div for scale.

      5. Read the DPF Differential Pressure value from a point during forced regeneration, as close as possible to completion, where the MAF has stabilized at a value of 30 gm/sec or more, and the Exhaust Temperature B1S2 value is approximately 610°C (1130°F).

      6. Check that the DPF Differential Pressure value does not exceed the value in the table.

        B00421JE02

        Tech Tips

        Read the standard value for DPF Differential Pressure from DPF mileage and MAF values.

        Standard
        DPF Differential Pressure value is less than or equal to the standard value.
        Result
        Proceed to
        OK
        NG

    OK

    GO TO STEP 15 Click here

    NG

  8. PERFORM ACTIVE TEST USING GTS (SECOND TIME OF ACTIVATE THE DPF REJUVENATE (PM))


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Start the engine.

    5. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the DPF Rejuvenate (PM) / Data List / MAF, Exhaust Temperature B1S1, Exhaust Temperature B1S2, DPF Differential Pressure and DPNR/DPF Status Reju(PM).


      Powertrain > Engine and ECT > Active Test
      Active Test Display
      Activate the DPF Rejuvenate (PM)
      Data List Display
      MAF
      Exhaust Temperature B1S1
      Exhaust Temperature B1S2
      DPF Differential Pressure
      DPNR/DPF Status Reju(PM)

      Tech Tips

      After clearing DTCs, immediately enter the Active Test and then drive the vehicle.

    7. Perform the Active Test and then drive the vehicle at a constant engine speed of 2500 to 3000 rpm or more (If DPF Differential Pressure judgment will be performed in the following step, then to keep the MAF at 30 gm/sec or more, use a higher engine rpm range than normal) (shift position: 3rd gear) at a vehicle speed between 65 to 100 km/h (40 to 62 mph).

      CAUTION:

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

      Tech Tips

      While the Active Test being performed, the accelerator pedal opening angle should be kept as constant as possible.

    8. Confirm that both Exhaust Temperature B1S1 and Exhaust Temperature B1S2 reach 250°C (482°F) or higher and the DPNR/DPF Status Reju(PM) turns from "Ready" to "Operate".

      Tech Tips


      • If the exhaust gas temperature does not reach the specified value, drive the vehicle again with a constant engine speed of 2500 to 3000 rpm or more (shift position: 3rd gear) at a vehicle speed between 65 to 100 km/h (40 to 62 mph).

      • Perform the Active Test until the DPNR/DPF Status Reju(PM) displays "Compl".

    9. Take a snapshot with the GTS when the Exhaust Temperature B1S1 and Exhaust Temperature B1S2 rise and become stable.

      Result
      Proceed to
      NEXT

    NEXT

  9. READ VALUE USING GTS (DPF DIFFERENTIAL PRESSURE)


    1. In the snapshot recorded in Step 8, check the DPF Differential Pressure, MAF and Exhaust Temperature B1S2 values during regeneration (DPNR/DPF Status Reju (PM) is "Operate").


      1. Check that "DPNR/DPF Status Reju (PM)" is "Compl" (Forced regeneration is complete).

      2. Change the snapshot data to graph display.

      3. Select from the parameter list "DPF Differential Pressure", "MAF" and "Exhaust Temperature B1S2".

      4. Select graph type to be "Line" and select 2 sec/div for scale.

      5. Read the DPF Differential Pressure value from a point during forced regeneration, as close as possible to completion, where the MAF has stabilized at a value of 30 gm/sec or more, and the Exhaust Temperature B1S2 value is approximately 610°C (1130°F).

      6. Check that the DPF Differential Pressure value does not exceed the value in the table.

        B00421JE02

        Tech Tips

        Read the standard value for DPF Differential Pressure from DPF mileage and MAF values.

        Standard
        DPF Differential Pressure value is less than or equal to the standard value.
        Result
        Proceed to
        OK
        NG

    OK

    GO TO STEP 15 Click here

    NG

  10. REPLACE NO. 2 EXHAUST MANIFOLD (DPF CATALYTIC CONVERTER)


    1. Replace the No. 2 exhaust manifold (DPF catalytic converter).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  11. PERFORM INITIALIZATION


    1. Clear the DPF deterioration record using the GTS.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 15 Click here

  12. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 14 Click here

  13. REPLACE ENGINE OIL LEVEL SENSOR (OIL LEVEL UPPER SWITCH)


    1. Replace the engine oil level sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  14. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    5. Start the engine and warm it up until the engine coolant temperature reaches 75 to 86°C (167 to 187°F).

    6. Drive the vehicle for 2 trips at a steady vehicle speed of 15 km/h (9.3 mph) or more (at an engine speed between 1800 and 3000 rpm or more).

      CAUTION:

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

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

    8. Confirm that the DTC is not output again.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

    END

  15. CHANGE ENGINE OIL


    1. Change the engine oil.

      Click here

      Tech Tips


      • Toyota recommends the use of approved "Toyota genuine motor oil". Another oil of matching quality can also be used.

        Oil grade: ACEA C2

      • Using engine oil other than ACEA C2 may damage the catalytic converter.

      • ACEA C2 is best choice for prevention of increasing the DPF differential pressure.

    2. Record the oil level maintenance history.

    3. Reset the oil maintenance indicator.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END