ECD SYSTEM(w/ Urea SCR System), Diagnostic DTC:P205B

DTC Code DTC Name
P205B Reductant Tank Temperature Sensor Circuit Range/Performance

DESCRIPTION

Refer to DTC P202B Click here.

P205B
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
After the engine has soaked for an appropriate length of time, start the engine and idle it for 4 seconds or more.

After the system has soaked for an appropriate length of time after the previous trip (while the engine coolant temperature has not yet increased after the engine has started), the temperature difference between the engine coolant and the urea solution (absolute value) is equal to or greater than a fixed value for 4 seconds or more.

(1 trip detection logic)

 Temperature sensor (Urea pump)
Related Data List
DTC No. Data List
P205B Reductant Pressure

CAUTION / NOTICE / HINT

Note

Handling the urea injector set


  • The urea injector set is a precision instrument. Take necessary precautions for installation and shipping. Do not use the part if it has been struck or dropped.

  • If the urea solution remaining inside the urea injector set dries out, it may become unable to inject urea solution. Therefore, conduct urea tube with heater assembly installation and removal quickly.

  • If the urea solution dries out and deposition occurs, urea may cling to the O-ring of the pipe and cause seal problems. Therefore, clean the urea tube with heater assembly and intake port of the urea injector set with water before attaching them.

  • Perform this procedure in an environment where urea solution will not freeze.

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 DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG) and turn the GTS on.

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

    4. Read the DTCs.

      Result
      Result Proceed to
      DTC P205B is output A
      DTC P205B and other DTCs are output* B

      Tech Tips

      If any other DTCs (CAN communication malfunctions or open/short circuits) are output, perform troubleshooting for those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. CHECK AROUND BOTTOM OF VEHICLE


    1. Check around the bottom of the vehicle.

      Tech Tips

      If the urea solution dries on an object, deposition occurs and leaves behind a white powder.

      Area to check:


      • Areas connecting the urea pump and urea injector set.

      • Perforations in the urea tank sub-assembly.

      • Connectors not connected properly.

      • Clogging of the cooling fins of the urea injector set.

        Tech Tips

        If the cooling fins are clogged with foreign matter, remove the foreign matter and clean the cooling fins.

    2. Repair any trouble areas.


    NEXT

  3. READ VALUE USING GTS (REDUCTANT TEMPERATURE)


    1. Prepare a bucket or other receptacle for collecting urea solution.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG) and turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Reductant Pump Check (Backward).

    5. Perform the Active Test.

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Reductant Purge.

    7. Perform the Active Test.

      Tech Tips

      Perform the Reductant Purge to draw the urea solution back into the urea tank sub-assembly from the urea injector set.

    8. After performing the Active Test, remove the urea tube with heater assembly from the urea injector set.

      Note

      If the urea solution remaining inside the urea injector set dries out, it may become unable to inject urea solution. Therefore, seal the urea injector set with an item such as a cover or rubber cap so that the inside does not dry out.

    9. Prepare a bucket or other receptacle for collecting urea solution from the urea tube with heater assembly.

    10. Enter the following menus: Powertrain / Engine and ECT / Active Test / Reductant Discharge.

    11. Perform the Active Test.

    12. According to the display on the GTS, perform the Active Test.

      Note

      When the Active Test is executed, urea solution will come out of the urea tube with heater assembly. Collect the urea solution with a bucket or other receptacle.

    13. After completing the Active Test, refill approximately 1 L of urea solution.

      Tech Tips

      Check the temperature of the urea solution to be used for refilling.

    14. Enter the following menus: Powertrain / Engine and ECT / Data List / Reductant Temperature.

    15. Read the Data List according to the display on the GTS.

      OK
      Within +/-5°C (9°F) of urea solution used for refilling.

    OK

    CHECK CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

    NG

  4. REPLACE UREA PUMP


    1. Replace the urea pump Click here.


    NEXT

  5. CHECK CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Stop the engine and allow it to soak.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG) and turn the GTS on.

    4. Clear the DTCs Click here.

    5. Turn the engine switch off for 30 seconds or more.

    6. Turn the engine switch on (IG) and turn the GTS on.

    7. Start the engine.

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

    9. Confirm that the DTC is not output again.


    NEXT

    END