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.

P203C
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine switch on (IG) for 3 seconds or more

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
P203D
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine switch on (IG) for 3 seconds or more

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
Related Data List
DTC No. Data List

P203C

P203D

 Reductant Level

WIRING DIAGRAM

B001E64E06

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.


    NG

    REPLACE UREA PUMP Click here

    OK

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

    B001GJ1E03
    Text in 1llustration
    *a

    Front view of wire harness connector

    (to Level Sensor (Urea Pump))

    		 *b

    Front view of wire harness connector

    (to Urea Pump Control ECU)

    1. Disconnect the level sensor (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
      s3-13 (VLV1) - s4-60 (VCLU) Always Below 1 Ω
      s3-14 (LV1) - s4-59 (LVU) Always Below 1 Ω
      s3-6 (ELV1) - s4-58 (ELU) Always Below 1 Ω
      s3-13 (VLV1) or s4-60 (VCLU) - Body ground and other terminals Always 10 kΩ or higher
      s3-14 (LV1) or s4-59 (LVU) - Body ground and other terminals Always 10 kΩ or higher
      s3-6 (ELV1) or s4-58 (ELU) - Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the urea pump control ECU connector.

    5. Reconnect the level sensor (urea pump) connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P203C OR P203D)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

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

    6. Turn the engine switch on (IG) and wait for 3 seconds or more.

    7. Turn the GTS on.

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

    9. Read the DTCs.

      Result:
      Result Proceed to
      DTC P203C or P203D is output A
      DTC is not output B

    B

    END

    A

  4. REPLACE UREA PUMP CONTROL ECU


    1. Replace the urea pump control ECU Click here.


    NEXT

  5. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs Click here.

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

    5. Turn the engine switch on (IG) and wait for 3 seconds or more.

    6. Turn the GTS on.

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

    8. Confirm that the DTC is not output again.


    NEXT

    END

  6. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace harness or connector.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  7. REPLACE UREA PUMP


    1. Replace the urea pump Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here