СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ, Diagnostic DTC:P0712, P0713

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

DESCRIPTION

The ATF temperature sensor converts the fluid temperature into a resistance value for use by the TCM.

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

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 TCM calculates the fluid temperature based on the voltage signal.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0712

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

  2. ATF temperature sensor resistance is below 79 Ω

  3. 0.5 seconds

  4. 1 trip detection logic

  • Short in ATF temperature sensor circuit

  • ATF temperature sensor (transmission wire)

  • TCM
P0713

  1. Either of the following conditions is met:


    • (A) 389 sec.*1 or 15min.*2 or more have elapsed after engine start when engine coolant temperature or intake air temperature is -29.375°C (-20.875°F) or less

    • (B) 10 sec. or more have elapsed after engine start when engine coolant temperature and intake air temperature are higher than -29.375°C (-20.875°F)

  2. ATF temperature sensor resistance is higher than 156 kΩ

  3. 0.5 seconds

  4. 1 trip detection logic

  • Open in ATF temperature sensor circuit

  • ATF temperature sensor (transmission wire)

  • TCM

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 below 79 Ω*1 or higher than 156 kΩ*2, the TCM interprets this as a fault in the ATF sensor or wiring. The TCM will illuminate the MIL and store the DTC.

Tech Tips


  • *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.

WIRING DIAGRAM

A01FFYAE01

INSPECTION PROCEDURE

Note

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


  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.

    Tech Tips

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

      ECT
      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.

      Tech Tips


      • 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

      Tech Tips

      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.

PROCEDURE


  1. READ VALUE USING GTS (A/T OIL TEMPERATURE 1)


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

      ECT
      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
      Result
      Result Proceed to
      Data List value is not within the normal condition A
      Data List value is within the normal condition B

    B

    REPLACE TCM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (ATF TEMPERATURE SENSOR - TCM)


    1. A01FF0QE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to TCM)

      Disconnect the TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F72-12 (THO1) - F72-13 (E2) Always 79 Ω to 156 kΩ
      F72-13 (E2) - Body ground Always 10 kΩ or higher
      F72-12 (THO1) - Body ground Always 10 kΩ or higher

      Tech Tips

      If the resistance is out of the specified range at any of the ATF temperatures 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

    NG

    CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM) Click here

    OK

  3. REPLACE TCM


    1. Replace the TCM Click here.


    NEXT

    PERFORM A/T CODE REGISTRATION Click here

  4. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)


    1. Disconnect the F73 transmission wire connector.

    2. Disconnect the F72 TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F73-8 (OIL) - F72-12 (THO1) Always Below 1 Ω
      F73-9 (E2) - F72-13 (E2) Always Below 1 Ω
      F73-8 (OIL) or F72-12 (THO1) - Body ground Always 10 kΩ or higher
      F73-9 (E2) or F72-13 (E2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ATF TEMPERATURE SENSOR (TRANSMISSION WIRE) Click here