Dtc P205C Reductant Tank Temperature Sensor Circuit Low


DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS

READ VALUE USING GTS (CHECK FOR OPEN IN WIRE HARNESS)

REPLACE UREA PUMP

CLEAR DTC

CHECK WHETHER DTC OUTPUT RECURS

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

REPLACE UREA PUMP CONTROL ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR

READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS)

CHECK WIRE HARNESS AND CONNECTOR (UREA PUMP - UREA PUMP CONTROL ECU)

DTC P205C Reductant Tank Temperature Sensor Circuit Low

DTC P205D Reductant Tank Temperature Sensor Circuit High


DESCRIPTION

Refer to DTC P202B (LandCruiser RM000005UUE000X_01.html).

P205C
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Engine switch on (IG) and wait for 10 seconds or more.
An open or short circuit occurs in the temperature sensor circuit for 10 seconds or more.
(1 trip detection logic)
  1. Open or short in temperature sensor circuit
  2. Temperature sensor (Urea Pump)
  3. Urea pump control ECU

P205D
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Engine switch on (IG) and wait for 10 seconds or more.
An open or short circuit occurs in the temperature sensor circuit for 10 seconds or more.
(1 trip detection logic)
  1. Open or short in temperature sensor circuit
  2. Temperature sensor (Urea Pump)
  3. Urea pump control ECU

Related Data List
DTC No.
Data List
P205C
P205D
Reductant Temperature

MONITOR DESCRIPTION

The urea pump control ECU calculates the temperature of the urea solution based on the output voltage of the temperature sensor. When the temperature sensor output voltage is outside the normal range, there may be a malfunction, short or open circuit in the temperature sensor. In this case, the urea pump control ECU determines that there is a malfunction in the temperature sensor, and then illuminates the MIL and stores a DTC through the ECM.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P205C Reductant Tank Temperature 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

  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 / Reductant Temperature.

  1. Read the values.

Standard:
Reductant temperature is the same as the ambient temperature of urea tank assembly.

Result:

Result
Proceed to
-40°C (-40°F)
A
80°C (176°F)
B
HINT:
  1. When the GTS indicates -40°C (-40°F), there is a open circuit.
  2. When the GTS indicates 80°C (176°F), there is a short circuit.


B
Go to step 9
A


2.READ VALUE USING GTS (CHECK FOR OPEN IN WIRE HARNESS)

  1. Disconnect the urea pump connector.


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P205C Reductant Tank Temperature Sensor Circuit Low


Text in Illustration
*1
Temperature Sensor (Urea Pump)
*2
Urea Pump Control ECU
*a
Front view of wire harness connector
(to Urea Pump)
-
-

  1. Connect terminals 1 (TUW) and 2 (ETUW) of the urea pump connector on the wire harness side.

  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 Temperature.

  1. Read the values.

OK:
80°C (176°F)


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 30 seconds or more.

  1. Read the DTCs.


NEXT


5.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the GTS to the DLC3.

  1. Turn the GTS on.

  1. Turn the engine switch on (IG) and wait for 10 seconds or more.

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

  1. Confirm that the DTCs are not output again.


NEXT

END

6.CHECK HARNESS AND CONNECTOR (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 P205C Reductant Tank Temperature Sensor Circuit Low


Text in Illustration
*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.

  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
s2-1 (TUW) - s3-54 (THU)
Always
Below 1 Ω
s2-2 (ETUW) - s3-53 (ETHU)
Always
Below 1 Ω


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 the harness or connector.



NEXT
Go to step 4

9.READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS)
Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P205C Reductant Tank Temperature Sensor Circuit Low

  1. Disconnect the urea pump assembly connector.

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Reductant Temperature.

  1. Read the values.

OK:
-40°C (-40°F)
Text in Illustration
*1
Temperature Sensor (Urea Pump)
*2
Urea Pump Control ECU


NG
Go to step 10
OK

REPLACE UREA PUMP

Go to step 3

10.CHECK WIRE HARNESS AND CONNECTOR (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 P205C Reductant Tank Temperature Sensor Circuit Low


Text in Illustration
*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.

  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
s2-1 (TUW) and s3-54 (THU) - Body ground and other terminals
Always
10 kΩ or higher


NG
Go to step 8
OK

REPLACE UREA PUMP CONTROL ECU