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AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P0710, P0712, P0713

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DTC Code DTC Name
P0710 Transmission Fluid Temperature Sensor "A" Circuit
P0712 Transmission Fluid Temperature Sensor "A" Circuit Low Input
P0713 Transmission Fluid Temperature Sensor "A" Circuit High Input
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DESCRIPTION

The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance value which is input into the ECM.

The ECM applies a voltage to the temperature sensor through ECM terminal THO1.

The sensor resistance changes with the transmission fluid 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
P0710

(a) and (b) are detected momentarily within 0.5 sec. when neither P0712 nor P0713 is detected (1-trip detection logic)

(a) ATF temperature sensor resistance is less than 79 Ω.

(b) ATF temperature sensor resistance is more than 156 kΩ.

HINT:

Within 0.5 sec., the malfunction switches from (a) to (b) or from (b) to (a)

  • Open or short in ATF temperature sensor circuit

  • Transmission wire (ATF temperature sensor)

  • ECM
P0712 ATF temperature sensor resistance is less than 79 Ω for 0.5 sec. or more (1-trip detection logic)

  • Short in ATF temperature sensor circuit

  • Transmission wire (ATF temperature sensor)

  • ECM
P0713

ATF temperature sensor resistance is more than 156 kΩ when 15 minutes or more have elapsed after the engine start

DTC is detected for 0.5 sec. or more (1-trip detection logic)

  • Open in ATF temperature sensor circuit

  • Transmission wire (ATF temperature sensor)

  • ECM
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MONITOR DESCRIPTION

These DTCs indicate an open or short in the automatic transmission fluid (ATF) temperature sensor (TFT sensor) circuit. The automatic transmission fluid (ATF) temperature sensor converts ATF temperature to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects an opens or shorts in the ATF temperature circuit. If the resistance value of the ATF temperature is less than 79 Ω *1or more than 156 kΩ *2, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will turn on the MIL and store the DTC.

*1: 150°C (302°F) or more is indicated regardless of the actual ATF temperature.

*2: -40°C (-40°F) is indicated regardless of the actual ATF temperature.

Tip:

The ATF temperature can be checked on the Intelligent tester display.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Tip:

Using 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.

Note:

In the table below, the value listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether apart is faulty or not.


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  1. READ DATA LIST


    1. Warm up the engine.

    2. Turn the ignition switch off.

    3. Connect Intelligent tester to the DLC3.

    4. Turn the ignition switch on (IG).

    5. Turn on the tester.

    6. Select the item "Powertrain / Engine and ECT / Data List".

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

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      A/T Oil Temperature 1

      ATF Temp. Sensor Value/

      min.: -40°C (-40°F)

      max.: 215°C (419°F)

      After Stall Test:

      Approx. 80°C (176°F)

      Equal to ambient temperature when cold soak

      		 If the value is "-40°C (-40°F)" or "215°C (419°F)", ATF temp. sensor circuit is opened or shorted.
      Tip:

      When DTC P0712 is output and Intelligent tester output is 150°C (302°F), there is a short circuit.

      When DTC P0713 is output and Intelligent tester output is -40°C (-40°F), there is an open circuit.

      Measure the resistance between terminal THO1 (THO) and body ground.

      Temperature Displayed Malfunction
      -40°C (-40°F) Open circuit
      150°C (302°F) or more Short circuit
      Tip:

      If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately set (in 0.5 seconds).

      When P0713 is set, P0711 cannot be detected.

      It is not necessary to inspect the circuit when P0711 is set.

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PROCEDURE


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    INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)


    1. A017EZRE68

      Disconnect the transmission wire connector from the transaxle.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      1 (THO) - 7 (E2) Always 79 Ω to 156 kΩ
      1 (THO) - Body ground Always 10 kΩ or higher
      7 (E2) - Body ground Always ↑
      Tip:

      If the resistance is out of the specified range with either the ATF temperature shown in the table below, the driveability of the vehicle may decrease.

      ATF Temperature Specified Condition
      10°C (50°F) 5 to 8 kΩ
      25°C (77°F) 2.5 to 4.5 kΩ
      110°C (230°F) 0.22 to 0.28 kΩ

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    CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)


    1. A017EPLE03

      Connect the transmission wire connector to the transaxle.

    2. Disconnect the ECM connectors.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      B2-24 (THO1) - B1-28 (E2) Always 79 Ω to 156 kΩ

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

      Standard resistance (Check for short)
      Tester Connection Condition Specified Condition
      B2-24 (THO1) - Body ground Always 10 kΩ or higher
      B1-28 (E2) - Body ground

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    REPAIR OR REPLACE TRANSMISSION WIREClick here

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPLACE ECM (for 2GR-FE)Click here