Dtc P0711 Transmission Fluid Temperature Sensor A Performance

Drivetrain. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
A750F Automatic Transmission Transaxle. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

INSPECTION PROCEDURE

CHECK DTC OUTPUT (IN ADDITION TO DTC P0711)

CHECK TRANSMISSION FLUID LEVEL

DTC P0711 Transmission Fluid Temperature Sensor "A" Performance


DESCRIPTION

The ATF (Automatic Transmission Fluid) temperature sensor converts the ATF temperature into a resistance value which is input into the TCM.
The TCM applies a voltage to the temperature sensor through TCM terminal THO1.
The sensor resistance changes with the ATF temperature.
One terminal of the sensor is grounded so that the sensor resistance and voltage decrease as the temperature becomes higher.
The TCM calculates the ATF temperature based on the voltage signal.

DTC Code
DTC Detection Condition
Trouble Area
P0711
Either condition is met:
1. (a), (b) and (c) are detected (2-trip detection logic):
(a) Vehicle has been driven normally for 39 minutes and 9.2 km (5.8 miles) or more.
(b) Intake air and engine coolant temperatures are -10°C (14°F) or higher 12 seconds after the engine is started.
(c) ATF temperature is below 20°C (68°F).
2. Both (a) and (b) are detected (2-trip detection logic):
(a) Engine coolant temperature is below 35°C (95°F) after the engine is started.
(b) ATF temperature is 95°C (203°F) or higher when the engine coolant temperature reaches 60°C (140°F) after 10 sec. or more.
No. 1 ATF temperature sensor (transmission wire)

MONITOR DESCRIPTION

This DTC indicates that there is a problem with the output from the Automatic Transmission Fluid (ATF) temperature sensor and that the sensor itself is defective. The ATF temperature sensor converts the ATF temperature to an electrical resistance value. Based on the resistance, the TCM determines the ATF temperature and detects an open or short in the ATF temperature sensor circuit or a fault in the 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 TCM interprets this as a fault, turns on the MIL and stores the DTC.
When the ATF temperature is 95°C (203°F) or higher when the engine coolant temperature reaches 60°C (140°F) after a cold start, the TCM also determines this as a fault, turns on the MIL and stores the DTC.

INSPECTION PROCEDURE


DATA LIST
HINT:
Using the intelligent tester 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 intelligent tester to the DLC3.

  4. Turn the ignition switch to ON.

  5. Turn the intelligent tester on.

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

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

    ECT
    Tester Display
    Measurement Item/Range
    Normal Condition
    Diagnostic Note
    A/T Oil Temperature 1
    No. 1 ATF temperature sensor value/
    Min.: -40.0°C (-40.0°F)
    Max.: 215.0°C (419.0°F)
    1. After stall test: Approximately 80°C (176°F)
    2. With engine cold: Equal to ambient temperature
    If the value is -40°C (-40°F) or 215°C (419°F), the No. 1 ATF temperature sensor circuit is open or shorted.

    HINT:
    When DTC P0712 is output and the intelligent tester output is 150°C (302°F) or higher, there is a short circuit.
    When DTC P0713 is output and the intelligent tester output is -40°C (-40°F), there is an open circuit.
    Check the temperature displayed on the tester 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
    If a circuit related to the ATF temperature sensor becomes open, P0713 is stored immediately (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 DTC OUTPUT (IN ADDITION TO DTC P0711)
  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the intelligent tester on.

  1. Enter the following menus: Powertrain / ECT / DTC.

  1. Read the DTCs using the tester.

    Result
    Result
    Proceed to
    Only 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 (HILUX_TGN26 RM0000030G907BX.html)
A


2.CHECK TRANSMISSION FLUID LEVEL
  1. Check the transmission fluid level (HILUX_TGN26 RM0000013BU08UX.html).

    OK:
    Automatic transmission fluid level is correct.


NG
ADD FLUID (HILUX_TGN26 RM0000013BU08UX.html)
OK

REPAIR OR REPLACE NO. 1 ATF TEMPERATURE SENSOR (TRANSMISSION WIRE) (HILUX_TGN26 RM0000013C1047X.html)