Dtc P204B Reductant Pressure Sensor Circuit Range/Performance


DESCRIPTION

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P204B)

CHECK AROUND BOTTOM VEHICLE

PERFORM ACTIVE TEST USING GTS (PRESSURE SENSOR CHECK)

REPLACE UREA PUMP

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P204B Reductant Pressure Sensor Circuit Range/Performance


DESCRIPTION

Refer to DTC P208B (LandCruiser RM000005UUM000X_01.html).

P204B
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Engine switch on (IG) for 5 seconds or more
When the urea pump is not rotating (urea pump operation check complete and not being filled), the pressure sensor value is outside of a fixed range.
(1 trip detection logic)
Pressure sensor (Urea pump)

Related Data List
DTC No.
Data List
P204B
Reductant Pressure

INSPECTION PROCEDURE

NOTICE:
Handling the urea injector set
  1. 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.
  2. 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.
  3. 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.
  4. Perform this procedure in an environment where urea solution will not freeze.
HINT:
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P204B)

  1. Connect the GTS to the DLC3.

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

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

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    DTC P204B is output
    		A
    DTC P204B and other DTCs are output*
    		B

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


B
GO TO DTC CHART (LandCruiser RM0000031HW07OX.html)
A


2.CHECK AROUND BOTTOM VEHICLE

  1. Check around the bottom of the vehicle.

    HINT:
    If the urea solution dries on an object, deposition occurs and leaves behind a white powder.
    Area to check:
    1. Areas connecting the urea pump and urea injector set.
    2. Perforations in the urea tank sub-assembly.
    3. Connectors not connected properly
    4. Clogging of the cooling fins of the urea injector set
      HINT:
      If the cooling fins are clogged with foreign matter, remove the foreign matter and clean the cooling fins.

  1. Repair any trouble areas.


NEXT


3.PERFORM ACTIVE TEST USING GTS (PRESSURE SENSOR CHECK)

  1. Connect the GTS to the DLC3.

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

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

  1. Perform the Active Test.

  1. Enter the following menus: Powertrain / Engine and ECT / Active Test / Reductant Purge / Data List / Reductant Pressure.

  1. After executing the Active Test, check the Reductant Pressure.

    Standard:
    Approximately 0 kPa

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

  1. After executing the Active Test, check the Reductant Pressure.

    HINT:
    Perform the Active Test until the pressure stabilizes (may take from 5 to 60 seconds).
    OK:
    400 to 600 kPa


OK
Go to step 5
NG


4.REPLACE UREA PUMP

  1. Replace the urea pump (LandCruiser RM000005UL0000X.html).


NEXT


5.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the GTS to the DLC3.

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

  1. Clear the DTCs (LandCruiser RM000000PDK1E5X.html).

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

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

  1. Wait for 5 seconds or more.

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

  1. Confirm that the DTC is not output again.


NEXT

END