ECD SYSTEM(w/ Urea SCR System), Diagnostic DTC:P203C, P203D

DTC Code DTC Name
P203C Reductant Level Sensor Circuit Low
P203D Reductant Level Sensor Circuit High

DESCRIPTION

The urea pump has a level sensor that detects the position of the surface of the fluid inside the urea tank in order to measure the remaining quantity of urea solution.

When the remaining quantity of urea solution falls below a fixed value, a warning is displayed on the combination meter.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P203C Reductant Level Sensor Circuit Low An open or short in the level sensor (urea pump) circuit for 3 seconds or more (1 trip detection logic).

  • Open or short in the level sensor circuit

  • Level sensor (urea pump)

  • Urea pump control ECU

 Comes on DTC stored
P203D Reductant Level Sensor Circuit High An open or short in the level sensor (urea pump) circuit for 3 seconds or more (1 trip detection logic).

  • Open or short in the level sensor circuit

  • Level sensor (urea pump)

  • Urea pump control ECU

 Comes on DTC stored
Related Data List
DTC No. Data List

P203C

P203D

 Reductant Level

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern

P203C

P203D

 Ignition switch to ON for 3 seconds or more

WIRING DIAGRAM

A01SHF2E03

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. INSPECT LEVEL SENSOR (UREA PUMP)


    1. Inspect the level sensor (urea pump).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE UREA PUMP Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (LEVEL SENSOR - UREA PUMP CONTROL ECU)

    A01SGU1C13
    *a

    Front view of wire harness connector

    (to Urea Pump)

    		 *b

    Front view of wire harness connector

    (to Urea Pump Control ECU)

    1. Disconnect the urea pump connector.

    2. Disconnect the urea pump control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      g6-13 (VLV1) - g1-60 (VCLU) Always Below 1 Ω
      g6-14 (LV1) - g1-59 (LVU) Always Below 1 Ω
      g6-6 (ELV1) - g1-58 (ELU) Always Below 1 Ω
      g6-13 (VLV1) or g1-60 (VCLU) - Body ground and other terminals Always 10 kΩ or higher
      g6-14 (LV1) or g1-59 (LVU) - Body ground and other terminals Always 10 kΩ or higher
      g6-6 (ELV1) or g1-58 (ELU) - 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

  3. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.

    4. Turn the ignition switch off and wait for at least 30 seconds.

    5. Turn the ignition switch to ON and wait for 3 seconds or more.

    6. Turn the GTS on.

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


      Powertrain > Engine > Trouble Codes

    8. Read the DTCs.

      Result
      Result Proceed to
      DTC P203C or P203D is output A
      No DTC is output B

    B

    END

    A

  4. REPLACE UREA PUMP CONTROL ECU


    1. Replace the urea pump control ECU.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. 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. Clear the DTCs.

    4. Turn the ignition switch off and wait for at least 30 seconds.

    5. Turn the ignition switch to ON and wait for 3 seconds or more.

    6. Turn the GTS on.

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

    8. Confirm that the DTC is not output again.


      Powertrain > Engine > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

    END

  6. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace harness or connector.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 5 Click here

  7. REPLACE UREA PUMP


    1. Replace the urea pump.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 5 Click here