Dtc P204C Reductant Pressure Sensor Circuit Low


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS (Reductant Pressure)

READ VALUE USING GTS (CHECK FOR OPEN)

REPLACE UREA PUMP

CLEAR DTC

CHECK DTC OUTPUT

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

REPLACE UREA PUMP CONTROL ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR

READ VALUE USING GTS (CHECK FOR SHORT)

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

DTC P204C Reductant Pressure Sensor Circuit Low

DTC P204D Reductant Pressure Sensor Circuit High


DESCRIPTION

Refer to DTC P208B (LandCruiser RM000005UUM000X_01.html).

P204C
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Engine switch on (IG) for 3 seconds
An open or short circuit occurs in the pressure sensor circuit for 3 seconds or more.
(1 trip detection logic)
  1. Open or short in pressure sensor circuit
  2. Pressure sensor (Urea pump)
  3. Urea pump control ECU

P204D
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Engine switch on (IG) for 3 seconds
An open or short circuit occurs in the pressure sensor circuit for 3 seconds or more.
(1 trip detection logic)
  1. Open or short in pressure sensor circuit
  2. Pressure sensor (Urea pump)
  3. Urea pump control ECU

Related Data List
DTC No.
Data List
P204C
P204D
Reductant Pressure

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P204C Reductant Pressure Sensor Circuit Low


INSPECTION PROCEDURE

HINT:
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.
1.READ VALUE USING GTS (Reductant Pressure)

  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 / Data List / Reductant Pressure.

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

    Result
    Result
    		Proceed to
    -50 kPa
    		A
    900 kPa
    		B


B
Go to step 9
A


2.READ VALUE USING GTS (CHECK FOR OPEN)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P204C Reductant Pressure Sensor Circuit Low

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

  1. Connect terminals s2-5 (VPSE) and s2-4 (PSE) of the pressure sensor (urea pump) wire harness side connector.

  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 / Data List / Reductant Pressure.

  1. 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
Go to step 6
OK


3.REPLACE UREA PUMP

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


NEXT


4.CLEAR DTC

  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 and wait for at least 30 seconds.


NEXT


5.CHECK DTC OUTPUT

  1. Connect the GTS to the DLC3.

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

  1. Turn the GTS on.

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

  1. Confirm that the DTC is not output again.


NEXT

END

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

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P204C Reductant Pressure Sensor Circuit Low


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.

  1. Disconnect the urea pump control ECU connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    s2-5 (VPSE) - s3-57 (VCPU)
    		Always
    		Below 1 Ω
    s2-4 (PSE) - s3-56 (PU)
    		Always
    		Below 1 Ω
    s2-3 (EPSE) - s3-55 (EPU)
    		Always
    		Below 1 Ω
    s2-5 (VPSE) or s3-57 (VCPU) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    s2-4 (PSE) or s3-56 (PU) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    s2-3 (EPSE) or s3-55 (EPU) - Body ground and other terminals
    		Always
    		10 kΩ or higher


NG
Go to step 8
OK


7.REPLACE UREA PUMP CONTROL ECU

  1. Replace the urea pump control ECU (LandCruiser RM000005UL6000X.html).



NEXT
Go to step 4

8.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace harness or connector.



NEXT
Go to step 4

9.READ VALUE USING GTS (CHECK FOR SHORT)

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

  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 / Data List / Reductant Pressure.

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

    OK:
    -50 kPa (Open circuit)


OK
Go to step 4
NG


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

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P204C Reductant Pressure Sensor Circuit Low


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.

  1. Disconnect the urea pump control ECU connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    s2-5 (VPSE) - s3-57 (VCPU)
    		Always
    		Below 1 Ω
    s2-4 (PSE) - s3-56 (PU)
    		Always
    		Below 1 Ω
    s2-3 (EPSE) - s3-55 (EPU)
    		Always
    		Below 1 Ω
    s2-5 (VPSE) or s3-57 (VCPU) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    s2-4 (PSE) or s3-56 (PU) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    s2-3 (EPSE) or s3-55 (EPU) - Body ground and other terminals
    		Always
    		10 kΩ or higher


OK
Go to step 7

NG
Go to step 8