ECD SYSTEM, Diagnostic DTC:P204C, P204D

DTC Code DTC Name
P204C Reductant Pressure Sensor Circuit Low
P204D Reductant Pressure Sensor Circuit High

DESCRIPTION

Refer to DTC P208B Click here.

P204C
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 3 seconds

An open or short circuit occurs in the pressure sensor circuit for 3 seconds or more.

(1 trip detection logic)

  • Open or short in pressure sensor circuit

  • Pressure sensor (Urea pump)

  • Urea pump control ECU
P204D
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 3 seconds

An open or short circuit occurs in the pressure sensor circuit for 3 seconds or more.

(1 trip detection logic)

  • Open or short in pressure sensor circuit

  • Pressure sensor (Urea pump)

  • Urea pump control ECU
Related Data List
DTC No. Data List

P204C

P204D

 Reductant Pressure

WIRING DIAGRAM

A003HXNE04

INSPECTION PROCEDURE

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. READ VALUE USING GTS (REDUCTANT PRESSURE)


    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 and ECT / Data List / Reductant Pressure.

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

      Result
      Result Proceed to
      -50 kPa A
      900 kPa B

    B

    READ VALUE USING GTS (CHECK FOR SHORT) Click here

    A

  2. READ VALUE USING GTS (CHECK FOR OPEN)


    1. A003I9AE02

      Disconnect the pressure sensor (urea pump) connector.

    2. Connect terminals 4 (VPSE) and 5 (PSE) of the pressure sensor (urea pump) wire harness side connector.

    3. Connect the GTS to the DLC3.

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

    5. Enter the following menus: Powertrain / Engine and ECT / Data List / Reductant Pressure.

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

      OK
      900 kPa
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Pressure Sensor (Urea Pump))

    NG

    CHECK HARNESS AND CONNECTOR (PRESSURE SENSOR (UREA PUMP) - UREA PUMP CONTROL ECU) Click here

    OK

  3. REPLACE UREA PUMP


    1. Replace the urea pump Click here.


    NEXT

  4. CLEAR DTC


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs Click here.

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


    NEXT

  5. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

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

    3. Turn the GTS on.

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

    5. Confirm that the DTC is not output again.


    NEXT

    END

  6. CHECK HARNESS AND CONNECTOR (PRESSURE SENSOR (UREA PUMP) - UREA PUMP CONTROL ECU)

    A003DOKE14
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Pressure Sensor (Urea Pump))

    		 *b

    Front view of wire harness connector

    (to Urea Pump Control ECU)

    1. Disconnect the pressure 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
      A47-4 (VPSE) - A45-57 (VCPU) Always Below 1 Ω
      A47-5 (PSE) - A45-56 (PU) Always Below 1 Ω
      A47-6 (EPSE) - A45-55 (EPU) Always Below 1 Ω
      A47-4 (VPSE) or A45-57 (VCPU) - Body ground and other terminals Always 10 kΩ or higher
      A47-5 (PSE) or A45-56 (PU) - Body ground and other terminals Always 10 kΩ or higher
      A47-6 (EPSE) or A45-55 (EPU) - Body ground and other terminals Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  7. REPLACE UREA PUMP CONTROL ECU


    1. Replace the urea pump control ECU Click here.


    NEXT

    CLEAR DTC Click here

  8. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace harness or connector.


    NEXT

    CLEAR DTC Click here

  9. READ VALUE USING GTS (CHECK FOR SHORT)


    1. Disconnect the pressure sensor (urea pump) connector.

    2. Connect the GTS to the DLC3.

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

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Reductant Pressure.

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

      OK
      -50 kPa

    OK

    CLEAR DTC Click here

    NG

  10. CHECK HARNESS AND CONNECTOR (PRESSURE SENSOR (UREA PUMP) - UREA PUMP CONTROL ECU)

    A003DOKE14
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Pressure Sensor (Urea Pump))

    		 *b

    Front view of wire harness connector

    (to Urea Pump Control ECU)

    1. Disconnect the pressure 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
      A47-4 (VPSE) - A45-57 (VCPU) Always Below 1 Ω
      A47-5 (PSE) - A45-56 (PU) Always Below 1 Ω
      A47-6 (EPSE) - A45-55 (EPU) Always Below 1 Ω
      A47-4 (VPSE) or A45-57 (VCPU) - Body ground and other terminals Always 10 kΩ or higher
      A47-5 (PSE) or A45-56 (PU) - Body ground and other terminals Always 10 kΩ or higher
      A47-6 (EPSE) or A45-55 (EPU) - Body ground and other terminals Always 10 kΩ or higher

    OK

    REPLACE UREA PUMP CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here