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AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P0712, P0713

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DTC Code DTC Name
P0712 Transmission Fluid Temperature Sensor "A" Circuit Low Input
P0713 Transmission Fluid Temperature Sensor "A" Circuit High Input
Table 1. *1 Resistance *2 Acceptable *3 Temperature
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DESCRIPTION

The transmission fluid pressure control circuit's fluid temperature is detected using the Automatic Transmission Fluid (ATF) temperature sensor, which is built onto the valve body. A signal that is based on the fluid temperature is then sent to the TCM.

The TCM applies voltage to the ATF temperature sensor through TCM terminal THO1 (OIL).

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 decreases as the temperature becomes higher.

The TCM calculates the ATF temperature based on the voltage signal.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0712 Transmission Fluid Temperature Sensor "A" Circuit Low Input

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


  1. The battery voltage is 8 V or more, the engine switch is on (IG) and the starter is off.

  2. ATF temperature sensor resistance is less than 79 Ω

  3. 0.5 seconds

  4. 1-trip detection logic

  • Short in ATF temperature sensor circuit

  • Transmission wire (ATF temperature sensor)

  • TCM

 Comes on DTC stored
P0713 Transmission Fluid Temperature Sensor "A" Circuit High Input

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


  1. DTC Detection Condition 1

  2. 479 seconds or more after starting engine (Engine coolant temperature and intake air temperature at engine start are -29.375°C (-20.875°F)) or less

  3. ATF temperature sensor resistance is higher than 156 kΩ

  4. 0.5 seconds

  5. 1-trip detection logic


  1. DTC Detection Condition 2

  2. 10 seconds or more after starting engine (Engine coolant temperature and intake air temperature at engine start are more than -29.375°C (-20.875°F))

  3. ATF temperature sensor resistance is higher than 156 kΩ

  4. 0.5 seconds

  5. 1-trip detection logic

  • Open in ATF temperature sensor circuit

  • Transmission wire (ATF temperature sensor)

  • TCM

 Comes on DTC stored
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MONITOR DESCRIPTION

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 circuit. If the resistance value of the ATF temperature sensor is less than 79 Ω*1 or higher than 156 kΩ*2, the TCM interprets this as a malfunction of the ATF sensor or wiring. The TCM will illuminate the MIL and store the DTC.

Tip:

  • *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.

  • The ATF temperature can be checked on the GTS display.

Table 2. *1 OIL *2 ATF Temperature Sensor *3 Transmission Wire
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

Perform registration and/or initialization when parts related to the automatic transmission are replaced.

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Tip:

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Start the engine and wait for 7 minutes or more.

  2. Check for DTCs again.

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  1. DATA LIST

    Note:

    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.

    Tip:

    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.


    1. Warm up the engine.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

    6. Enter the following menus: Powertrain / ECT / Data List / A/T Oil Temperature 1.

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


      1. Powertrain > ECT > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        A/T Oil Temperature 1 ATF temperature sensor value

        Min.: -40°C (-40°F)

        Max.: 150°C (302°F)

        • After stall speed test:

          Approximately 80°C (176°F)

        • While engine is cold: Equal to ambient temperature

        		 If value is -40°C (-40°F) or 150°C (302°F), ATF temperature sensor circuit is open or short circuited



      1. Powertrain > ECT > Data List
        Tester Display
        A/T Oil Temperature 1




      Tip:

      • When DTC P0712 is output and the GTS shows 150°C (302°F) or more, there is a short circuit.

      • When DTC P0713 is output and the GTS shows -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 more Short circuit
      Tip:

      If a circuit related to the ATF temperature sensor becomes open, P0713 will be stored in approximately 0.5 seconds. It is not necessary to inspect the circuit when P0711 is output.

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PROCEDURE


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    READ VALUE USING GTS


    1. Warm up the engine.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

    6. Enter the following menus: Powertrain / ECT / Data List / A/T Oil Temperature 1.

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


      1. Powertrain > ECT > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        A/T Oil Temperature 1 ATF temperature sensor value

        Min.: -40°C (-40°F)

        Max.: 150°C (302°F)

        • After stall speed test:

          Approximately 80°C (176°F)

        • While engine is cold: Equal to ambient temperature

        		 If value is -40°C (-40°F) or 150°C (302°F), ATF temperature sensor circuit is open or short circuited



      1. Powertrain > ECT > Data List
        Tester Display
        A/T Oil Temperature 1




      Result
      Result Proceed to
      Data List value is normal A
      Data List value is not normal B

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    CHECK HARNESS AND CONNECTOR (ATF TEMPERATURE SENSOR - TCM)


    1. B0067R2C36
      *a

      Rear view of wire harness connector

      (to TCM)

      Disconnect the F8 TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F8-12 (THO1) - F8-13 (E2) Always 79 Ω to 156 kΩ
      F8-13 (E2) - Body ground Always 10 kΩ or higher
      F8-12 (THO1) - Body ground Always 10 kΩ or higher
      Tip:

      If the resistance is out of the specified range with 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
      Result
      Proceed to
      OK
      NG

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    REPLACE TCM


    1. Replace the TCM.

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      Result
      Proceed to
      NEXT

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    CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)


    1. Disconnect the F25 transmission wire connector.

    2. Disconnect the F8 TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F25-8 (OIL) - F8-12 (THO1) Always Below 1 Ω
      F25-9 (E2) - F8-13 (E2) Always Below 1 Ω
      F25-8 (OIL) or F8-12 (THO1) - Body ground Always 10 kΩ or higher
      F25-9 (E2) or F8-13 (E2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)Click here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - TCM)