ECD SYSTEM(w/ Urea SCR System), Diagnostic DTC:P208B, P208D, P20E9

DTC Code DTC Name
P208B Reductant Pump "A" Control Range/Performance
P208D Reductant Pump "A" Control Circuit High
P20E9 Reductant Pressure Too High

DESCRIPTION

The urea pump is a bottom entry type intake pump installed to the bottom of the urea tank sub-assembly.

This urea pump has functions that 1) pressurize and supply the urea solution, 2) thaw frozen urea solution and heat the urea solution to prevent further freezing, 3) gauge the level of remaining urea solution inside the tank and 4) filter foreign matter inside the urea tank sub-assembly.

When the engine is stopped, the urea pump operates in reverse to draw the urea solution in the pipe back into the urea tank sub-assembly.

The urea pump performs feedback control using the pressure sensor, achieving accurate urea solution volume adjustment control.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P208B Reductant Pump "A" Control Range/Performance When each pump status is "operating" (operation check, filling, pressure increase, pressure maintenance, line pressure relief), urea pump rotation malfunctions, pressure malfunctions, etc., are detected multiple times (1 trip detection logic). Urea pump Comes on DTC stored
P208D Reductant Pump "A" Control Circuit High When power is supplied to the urea pump (during normal/reverse operation, power supplied to heater, position fixed), the pump current is equal to or greater than a fixed value (1 trip detection logic). Urea pump Comes on DTC stored
P20E9 Reductant Pressure Too High After filling the urea injector with urea solution from the urea pipe, the urea pressure is continuously higher than a fixed value (1 trip detection logic). Urea pump Comes on DTC stored
Related Data List
DTC No. Data List

P208B

P208D

P20E9

 Urea Solution Pressure

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern

P208B

P208D

P20E9

 Idle engine for 5 second

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 FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P208B, P208D OR P20E9)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

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

    4. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC P208B, P208D or P20E9 is output A
      DTC P208B, P208D or P20E9 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.

      Result
      Proceed to
      NEXT

    NEXT

  3. PERFORM ACTIVE TEST USING GTS (ACTIVATES THE REDUCTANT PUMP CHECK)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Start the engine and idle it for 5 seconds or more.

    4. Clear the DTCs.

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

    6. Turn the ignition switch to ON and turn the GTS on.

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

    8. Perform the Active Test.


      Powertrain > Engine > Active Test
      Tester Display
      Reductant Pump Check (Backward)

    9. Enter the following menus: Powertrain / Engine / Active Test / Reductant Purge.

    10. Perform the Active Test.

      Tech Tips

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


      Powertrain > Engine > Active Test
      Tester Display
      Reductant Purge

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

    12. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      No DTCs are output A
      DTC P208B, P208D or P20E9 is output B

    B

    GO TO STEP 5 Click here

    A

  4. PERFORM ACTIVE TEST USING GTS (Activates the Reductant Filling (Pressure Keep))


    1. Enter the following menus: Powertrain / Engine / Active Test / Reductant Filling (Pressure Keep) / Data List / Diesel Exhaust / Reductant Pressure.

    2. Execute "Reductant Filling (Pressure Keep)


      Powertrain > Engine > Active Test
      Active Test Display
      Reductant Filling (Pressure Keep)
      Data List Display
      Reductant Pressure

    3. Check the Reductant Pressure.

      OK
      400 to 600 kPa

      Tech Tips

      During a malfunction, pressure either does not increase, or increases to 800 kPa or higher and then stops.

      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 6 Click here

    NG

  5. REPLACE UREA PUMP


    1. Replace the urea pump.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Start the engine and idle it for 5 seconds or more.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

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

    6. Turn the ignition switch to ON and turn the GTS on.

    7. Start the engine and idle it for 5 seconds or more.

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

    9. Confirm that the DTCs are not output again.


      Powertrain > Engine > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

    END