Dtc P0711 Transmission Fluid Temperature Sensor A Performance


DESCRIPTION

MONITOR DESCRIPTION

INSPECTION PROCEDURE

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0711)

CHECK TRANSMISSION FLUID LEVEL

DTC P0711 Transmission Fluid Temperature Sensor "A" Performance


DESCRIPTION

The No. 1 ATF temperature sensor converts the fluid temperature into a resistance value for use by the ECM.
The ECM applies a voltage to the temperature sensor through terminal THO1 of the ECM.
The sensor resistance changes with the ATF temperature. As the temperature becomes higher, the sensor resistance decreases.
One terminal of the sensor is grounded so that the sensor resistance decreases and the voltage goes down as the temperature becomes higher.
The ECM calculates the fluid temperature based on the voltage signal.

DTC No.
DTC Detection Condition
Trouble Area
P0711
Either condition is met: (2 trip detection logic)
  1. (a) Certain monitor enabling conditions are met and the No. 1 ATF temperature is below 20°C (68°F)
  1. (b) Certain monitor enabling conditions are met and the No. 1 ATF temperature is 110°C (230°F) or higher
No. 1 ATF temperature sensor (transmission wire)

MONITOR DESCRIPTION

This DTC indicates that there is a problem with output signals from the No. 1 ATF temperature sensor and that the sensor itself is defective. The No. 1 ATF temperature sensor converts the ATF temperature into an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature and detects an open or short in the No. 1 ATF temperature sensor circuit or a fault of the No. 1 ATF temperature sensor.
After running the vehicle for a certain period, the ATF temperature should increase. If the ATF temperature is below 20°C (68°F) after running the vehicle for a certain period, the ECM interprets this as a malfunction, illuminates the MIL and stores the DTC.
When the ATF temperature is 110°C (230°F) or higher and the engine coolant temperature takes 10 seconds or more to reach 60°C (140°F) after a cold start, the ECM also determines this as a malfunction, illuminates the MIL and stores the DTC.

INSPECTION PROCEDURE

NOTICE:
Perform registration and/or initialization when parts related to the automatic transmission are replaced (LandCruiser RM000000O7H0HLX.html).
HINT:
After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
  1. Start the engine.*1
  2. Drive the vehicle 27 km (16.8 miles) or more over a period of 12 minutes and 30 seconds or more.*2
  3. After 55 minutes or more have elapsed since performing step (*1), turn the ignition switch off.*3
  4. Perform steps (*1) through (*3) again.
  5. Check for DTCs again (LandCruiser RM000000W7711DX.html).

DATA LIST
HINT:
Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.
NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

  1. Warm up the engine.

  2. Turn the ignition switch off.

  3. Connect the GTS to the DLC3.

  4. Turn the ignition switch to ON.

  5. Turn the GTS on.

  6. Enter the following menus: Powertrain / Engine and ECT / Data List.

  7. According to the display on the GTS, read the Data List.

    Engine and ECT
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    A/T Oil Temperature 1
    		No. 1 ATF temperature sensor value/
    Min.: -40°C (-40°F)
    Max.: 150°C (302°F)
    1. Approx. 80°C (176°F): After stall test
    2. Equal to ambient temperature when cold soak
    		If the value -40°C (-40°F) or 150°C (302°F), No. 1 ATF temperature sensor circuit is open or shorted.

    HINT:
    When DTC P0712 is output and the GTS indicates 150°C (302°F) or higher, there is a short circuit.
    When DTC P0713 is output and the GTS indicates -40°C (-40°F), there is an open circuit.
    Check the temperature displayed on the GTS in order to check if a malfunction exists.

    Temperature Displayed
    		Malfunction
    -40°C (-40°F)
    		Open circuit
    150°C (302°F) or higher
    		Short circuit
    HINT:
    If a circuit related to the No. 1 ATF temperature sensor becomes open, P0713 is immediately stored (in 0.5 seconds). When P0713 is stored, P0711 cannot be stored.
    It is not necessary to inspect the circuit when P0711 is stored.
1.CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0711)

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the GTS on.

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

  1. Read the DTCs using the GTS.

    Result
    Result
    		Proceed to
    Only DTC P0711 is output
    		A
    P0711 and other DTCs are output
    		B

    HINT:
    If any other codes besides P0711 are output, perform troubleshooting for those DTCs first.


B
GO TO DTC CHART (LandCruiser RM000000W710Q6X.html)
A


2.CHECK TRANSMISSION FLUID LEVEL

  1. Check the transmission fluid level (LandCruiser RM0000013BU0D3X.html).

OK:
Automatic transmission fluid level is correct.


NG
ADJUST FLUID LEVEL (LandCruiser RM0000013BU0D3X.html)
OK

REPLACE NO. 1 ATF TEMPERATURE SENSOR (TRANSMISSION WIRE) (LandCruiser RM000000ODV01OX.html)